<SEC-DOCUMENT>0001193125-13-189819.txt : 20130501
<SEC-HEADER>0001193125-13-189819.hdr.sgml : 20130501
<ACCEPTANCE-DATETIME>20130501080117
ACCESSION NUMBER:		0001193125-13-189819
CONFORMED SUBMISSION TYPE:	10-Q
PUBLIC DOCUMENT COUNT:		10
CONFORMED PERIOD OF REPORT:	20130331
FILED AS OF DATE:		20130501
DATE AS OF CHANGE:		20130501

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PATTERSON UTI ENERGY INC
		CENTRAL INDEX KEY:			0000889900
		STANDARD INDUSTRIAL CLASSIFICATION:	DRILLING OIL & GAS WELLS [1381]
		IRS NUMBER:				752504748
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		10-Q
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-22664
		FILM NUMBER:		13800423

	BUSINESS ADDRESS:	
		STREET 1:		4510 LAMESA HWY
		STREET 2:		P O DRAWER 1416
		CITY:			SNYDER
		STATE:			TX
		ZIP:			79549
		BUSINESS PHONE:		9155731104

	MAIL ADDRESS:	
		STREET 1:		P O DRAWER 1416
		CITY:			SNYDER
		STATE:			TX
		ZIP:			79550

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PATTERSON ENERGY INC
		DATE OF NAME CHANGE:	19940228
</SEC-HEADER>
<DOCUMENT>
<TYPE>10-Q
<SEQUENCE>1
<FILENAME>d503564d10q.htm
<DESCRIPTION>FORM 10-Q
<TEXT>
<HTML><HEAD>
<TITLE>Form 10-Q</TITLE>
</HEAD>
 <BODY BGCOLOR="WHITE">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="line-height:0px;margin-top:0px;margin-bottom:0px;border-bottom:0.5pt solid #000000">&nbsp;</P>
<P STYLE="line-height:3px;margin-top:0px;margin-bottom:2px;border-bottom:0.5pt solid #000000">&nbsp;</P> <P STYLE="margin-top:4px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="5"><B>UNITED STATES </B></FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="5"><B>SECURITIES AND EXCHANGE COMMISSION </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="3"><B>Washington,&nbsp;D.C. 20549 </B></FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P><center>
<P STYLE="line-height:6px;margin-top:0px;margin-bottom:2px;border-bottom:1pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="5"><B>Form&nbsp;10-Q </B></FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P><center>
<P STYLE="line-height:6px;margin-top:0px;margin-bottom:2px;border-bottom:1pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="3"><B></B><FONT STYLE="FONT-FAMILY:WINGDINGS">&#120;</FONT><B></B><B></B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="3"><B>QUARTERLY REPORT PURSUANT TO SECTION&nbsp;13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 </B></FONT></TD></TR></TABLE>
 <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>For the quarterly period ended March&nbsp;31, 2013 </B></FONT></P>
 <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>or </B></FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="3"><B></B><FONT STYLE="FONT-FAMILY:WINGDINGS">&#168;</FONT><B></B><B></B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="3"><B>TRANSITION REPORT PURSUANT TO SECTION&nbsp;13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 </B></FONT></TD></TR></TABLE>
<P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>For the transition period
from&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
to&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </B></FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="2"><B>Commission file number 0-22664 </B></FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P><center>
<P STYLE="line-height:6px;margin-top:0px;margin-bottom:2px;border-bottom:1pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="6"><B>Patterson-UTI
Energy, Inc. </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>(Exact name of registrant as specified in its charter) </B></FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P><center> <P STYLE="line-height:6px;margin-top:0px;margin-bottom:2px;border-bottom:1pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="50%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="48%"></TD></TR>


<TR>
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>DELAWARE</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>75-2504748</B></FONT></TD></TR>
<TR>
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(State or other jurisdiction of</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(I.R.S. Employer</B></FONT></TD></TR>
<TR>
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>incorporation or organization)</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Identification No.)</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>450 GEARS ROAD, SUITE 500</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD></TR>
<TR>
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>HOUSTON, TEXAS</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>77067</B></FONT></TD></TR>
<TR>
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(Address of principal executive offices)</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(Zip Code)</B></FONT></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>(281)&nbsp;765-7100 </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>(Registrant&#146;s telephone number, including area code) </B></FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>N/A
</B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(Former name, former address and former fiscal year, </B></FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>if changed since last report) </B></FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P><center>
<P STYLE="line-height:6px;margin-top:0px;margin-bottom:2px;border-bottom:1pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Indicate by
check mark whether the registrant (1)&nbsp;has filed all reports required to be filed by Section&nbsp;13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12&nbsp;months (or for such shorter period that the registrant was required
to file such reports), and (2)&nbsp;has been subject to such filing requirements for the past 90&nbsp;days.&nbsp;&nbsp;&nbsp;&nbsp;Yes&nbsp;&nbsp;<FONT STYLE="FONT-FAMILY:WINGDINGS">&#120;</FONT>&nbsp;&nbsp;&nbsp;&nbsp;No&nbsp;&nbsp;<FONT
STYLE="FONT-FAMILY:WINGDINGS">&#168;</FONT> </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Indicate by check mark whether the registrant has submitted electronically and
posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (section 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the
registrant was required to submit and post such files). </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">Yes&nbsp;&nbsp;<FONT STYLE="FONT-FAMILY:WINGDINGS">&#120;</FONT>&nbsp;&nbsp;&nbsp;&nbsp;No&nbsp;&nbsp;
<FONT STYLE="FONT-FAMILY:WINGDINGS">&#168;</FONT> </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Indicate by check mark whether the registrant is a large accelerated filer,
an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of &#147;large accelerated filer,&#148; &#147;accelerated filer&#148; and &#147;smaller reporting company&#148; in Rule&nbsp;12b-2 of the Exchange
Act: </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="16%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="60%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="20%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="1%"></TD></TR>


<TR>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">Large&nbsp;accelerated&nbsp;filer</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2"><FONT STYLE="FONT-FAMILY:WINGDINGS">&#120;</FONT></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">Accelerated&nbsp;filer</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2"><FONT STYLE="FONT-FAMILY:WINGDINGS">&#168;</FONT></FONT></TD></TR>
<TR>
<TD HEIGHT="8"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD>
<TD HEIGHT="8" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">Non-accelerated filer</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2"><FONT STYLE="FONT-FAMILY:WINGDINGS">&#168;</FONT></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">Smaller&nbsp;reporting&nbsp;company</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2"><FONT STYLE="FONT-FAMILY:WINGDINGS">&#168;</FONT></FONT></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Indicate by check mark whether the registrant is a shell company (as defined in Rule&nbsp;12b-2 of the
Exchange Act).&nbsp;&nbsp;&nbsp;&nbsp;Yes&nbsp;&nbsp;<FONT STYLE="FONT-FAMILY:WINGDINGS">&#168;</FONT>&nbsp;&nbsp;&nbsp;&nbsp;No&nbsp;&nbsp;<FONT STYLE="FONT-FAMILY:WINGDINGS">&#120;</FONT> </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Indicate the number of shares outstanding of each of the issuer&#146;s classes of common stock, as of the latest practicable date.
</FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">146,889,903 shares of common stock, $0.01&nbsp;par value, as of April 25, 2013 </FONT></P>
<P STYLE="font-size:8px;margin-top:0px;margin-bottom:0px">&nbsp;</P> <P STYLE="line-height:0px;margin-top:0px;margin-bottom:0px;border-bottom:0.5pt solid #000000">&nbsp;</P>
<P STYLE="line-height:3px;margin-top:0px;margin-bottom:2px;border-bottom:0.5pt solid #000000">&nbsp;</P>

<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES </B></FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B><A NAME="toc"></A>TABLE OF CONTENTS </B></FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="6%"></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD WIDTH="89%"></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="right" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1">Page</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR>
<TD VALIGN="top" COLSPAN="3" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B><A HREF="#tx503564_1">PART&nbsp;I&nbsp;&#151; FINANCIAL INFORMATION </A></B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="4"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">ITEM&nbsp;1.</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A HREF="#tx503564_2">Financial Statements</A></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A HREF="#tx503564_3">Unaudited consolidated balance sheets</A></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A HREF="#tx503564_4">Unaudited consolidated statements of operations</A></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A HREF="#tx503564_5">Unaudited consolidated statements of comprehensive income</A></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A HREF="#tx503564_6">Unaudited consolidated statements of changes in stockholders&#146; equity</A></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A HREF="#tx503564_7">Unaudited consolidated statements of cash flows</A></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A HREF="#tx503564_8">Notes to unaudited consolidated financial statements</A></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">6</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">ITEM&nbsp;2.</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A HREF="#tx503564_9">Management&#146;s Discussion and Analysis of Financial Condition and Results of
Operations</A></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">17</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">ITEM&nbsp;3.</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A HREF="#tx503564_10">Quantitative and Qualitative Disclosures About Market Risk</A></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">25</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">ITEM&nbsp;4.</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A HREF="#tx503564_11">Controls and Procedures</A></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">25</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD>
<TD HEIGHT="16" COLSPAN="4"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B><A HREF="#tx503564_12">PART&nbsp;II&nbsp;&#151; OTHER INFORMATION </A></B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="4"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">ITEM&nbsp;2.</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A HREF="#tx503564_13">Unregistered Sales of Equity Securities and Use of Proceeds</A></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">25</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">ITEM&nbsp;6.</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A HREF="#tx503564_14">Exhibits</A></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">26</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A HREF="#tx503564_15">Signature </A></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">27</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
</TABLE>

<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B><A NAME="tx503564_1"></A>PART&nbsp;I&nbsp;&#151; FINANCIAL INFORMATION </B></FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A NAME="tx503564_2"></A><B>ITEM&nbsp;1.&nbsp;</B><B><I>Financial Statements</I></B> </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>The following unaudited consolidated financial statements include all adjustments which are, in the opinion of management, necessary
for a fair statement of the results for the interim periods presented. </B></FONT></P> <P STYLE="margin-top:24px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES
</B></FONT></P>
 <P STYLE="margin-top:6px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B><A NAME="tx503564_3"></A>CONSOLIDATED BALANCE SHEETS </B></FONT></P>
 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">(unaudited, in thousands, except share data) </FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="82%"></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>March&nbsp;31,</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>December&nbsp;31,</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>ASSETS</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="top"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Current assets:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Cash and cash equivalents</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">144,031</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">110,723</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Accounts receivable, net of allowance for doubtful accounts of $3,582 and $3,513 at March&nbsp;31, 2013 and December&nbsp;31,
2012, respectively</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">491,230</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">465,517</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Inventory</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">22,954</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">26,889</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Deferred tax assets, net</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">42,505</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">52,959</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Other</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">40,593</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">43,903</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total current assets</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">741,313</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">699,991</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Property and equipment, net</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3,682,750</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3,615,383</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Goodwill and intangible assets</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">170,435</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">171,463</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Deposits on equipment purchases</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">35,913</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">43,776</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Other</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">26,821</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">26,298</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total assets</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4,657,232</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4,556,911</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>LIABILITIES AND STOCKHOLDERS&#146; EQUITY</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="top"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Current liabilities:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Accounts payable</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">233,576</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">188,823</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Federal and state income taxes payable</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,261</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">6,158</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Accrued expenses</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">141,517</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">158,632</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Current portion of long-term debt</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,500</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">6,250</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total current liabilities</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">389,854</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">359,863</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Long-term debt</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">690,000</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">692,500</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Deferred tax liabilities, net</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">871,403</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">857,302</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Other</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">6,642</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">6,589</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total liabilities</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,957,899</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,916,254</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Commitments and contingencies (see Note 9)</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Stockholders&#146; equity:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Preferred stock, par value $.01; authorized 1,000,000 shares, no shares issued</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Common stock, par value $.01; authorized 300,000,000 shares with 185,212,330 and 184,059,900 issued and 146,427,968 and
145,913,162 outstanding at March&nbsp;31, 2013 and December&nbsp;31, 2012, respectively</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,852</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,841</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Additional paid-in capital</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">890,809</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">863,558</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Retained earnings</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,597,460</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,548,542</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Accumulated other comprehensive income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">19,464</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">21,767</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Treasury stock, at cost, 38,784,362 shares and 38,146,738 shares at March&nbsp;31, 2013 and December&nbsp;31, 2012,
respectively</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(810,252</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(795,051</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total stockholders&#146; equity</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,699,333</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,640,657</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total liabilities and stockholders&#146; equity</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4,657,232</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4,556,911</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">The accompanying notes are an integral part of these unaudited consolidated financial statements.
</FONT></P>

 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">1 </FONT></P>


<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES </B></FONT></P>
 <P STYLE="margin-top:6px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B><A NAME="tx503564_4"></A>CONSOLIDATED STATEMENTS OF OPERATIONS </B></FONT></P>
 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">(unaudited, in thousands, except per share data) </FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="84%"></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Three Months
Ended</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>March&nbsp;31,</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Operating revenues:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Contract drilling</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">419,094</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">489,482</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Pressure pumping</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">231,160</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">241,722</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Oil and natural gas</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">16,785</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">14,717</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total operating revenues</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">667,039</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">745,921</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Operating costs and expenses:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Contract drilling</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">247,072</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">282,649</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Pressure pumping</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">168,156</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">166,857</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Oil and natural gas</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,922</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,730</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Depreciation, depletion, amortization and impairment</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">136,435</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">122,953</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Selling, general and administrative</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">17,397</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">13,868</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net (gain) loss on asset disposals</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">125</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2,400</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Provision for bad debts</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,600</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total operating costs and expenses</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">572,107</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">588,257</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Operating income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">94,932</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">157,664</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Other income (expense):</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Interest income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">173</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">54</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Interest expense</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(6,766</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(4,582</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Other</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">19</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">55</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total other expense</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(6,574</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(4,473</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Income before income taxes</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">88,358</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">153,191</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Income tax expense:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Current</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,573</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,510</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Deferred</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">24,555</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">48,407</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total income tax expense</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">32,128</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">55,917</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">56,230</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">97,274</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net income per common share:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Basic</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.38</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.62</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Diluted</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.38</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.62</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Weighted average number of common shares outstanding:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Basic</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">144,827</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">154,625</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Diluted</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">146,783</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">155,401</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Cash dividends per common share</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.05</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.05</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">The accompanying notes are an integral part of these unaudited consolidated financial statements.
</FONT></P>

 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">2 </FONT></P>


<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES </B></FONT></P>
 <P STYLE="margin-top:6px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B><A NAME="tx503564_5"></A>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME </B></FONT></P>
 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">(unaudited, in thousands) </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="86%"></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Three Months
Ended</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>March&nbsp;31,</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">56,230</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">97,274</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Other comprehensive income (loss), net of taxes of $0 and $0, respectively:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Foreign currency translation adjustment</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2,303</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,554</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total comprehensive income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">53,927</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">99,828</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">The accompanying notes are an integral part of these unaudited consolidated financial statements.
</FONT></P>

 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">3 </FONT></P>


<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES </B></FONT></P>
 <P STYLE="margin-top:6px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B><A NAME="tx503564_6"></A>CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS&#146; EQUITY </B></FONT></P>
 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">(unaudited, in thousands) </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="46%"></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD COLSPAN="10" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Accumulated</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Common Stock</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Additional</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Other</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Number&nbsp;of</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Paid-in</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Retained</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Comprehensive</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Treasury</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Shares</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Amount</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Capital</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Earnings</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Income</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Stock</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Total</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Balance, December&nbsp;31, 2012</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">184,060</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,841</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">863,558</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,548,542</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">21,767</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(795,051</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,640,657</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">56,230</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">56,230</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Foreign currency translation adjustment</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2,303</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2,303</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Issuance of restricted stock</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">18</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Forfeitures of restricted stock</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(16</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Exercise of stock options</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,150</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">11</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">18,611</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">18,622</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Stock-based compensation</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5,903</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5,903</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Tax benefit related to stock-based compensation</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,737</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,737</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Payment of cash dividends</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(7,312</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(7,312</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Purchase of treasury stock</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(15,201</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(15,201</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Balance, March&nbsp;31, 2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">185,212</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,852</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">890,809</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,597,460</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">19,464</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(810,252</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,699,333</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE>
 <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">The accompanying notes are an integral part of these unaudited consolidated financial statements. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">4 </FONT></P>


<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES </B></FONT></P>
 <P STYLE="margin-top:6px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B><A NAME="tx503564_7"></A>CONSOLIDATED STATEMENTS OF CASH FLOWS </B></FONT></P>
 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">(unaudited, in thousands) </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="83%"></TD>
<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Three Months
Ended</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>March&nbsp;31,</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Cash flows from operating activities:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">56,230</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">97,274</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Adjustments to reconcile net income to net cash provided by operating activities:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Depreciation, depletion, amortization and impairment</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">136,435</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">122,953</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Provision for bad debts</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,600</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Dry holes and abandonments</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">10</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">56</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Deferred income tax expense</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">24,555</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">48,407</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Stock-based compensation expense</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5,903</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5,458</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net (gain) loss on asset disposals</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">125</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2,400</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Changes in operating assets and liabilities:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Accounts receivable</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(25,220</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(38,109</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Income taxes receivable/payable</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,267</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5,807</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Inventory and other assets</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">6,672</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5,332</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Accounts payable</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">21,385</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">30,418</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Accrued expenses</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(17,698</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(12,234</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Other liabilities</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">53</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(897</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:7.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net cash provided by operating activities</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">209,717</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">263,665</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Cash flows from investing activities:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Purchase of property and equipment</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(174,161</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(263,403</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Proceeds from disposal of assets</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">707</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4,651</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:7.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net cash used in investing activities</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(173,454</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(258,752</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Cash flows from financing activities:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Purchase of treasury stock</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(15,201</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(15</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Dividends paid</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(7,312</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(7,788</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Tax benefit related to stock-based compensation</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,737</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">166</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Repayment of long-term debt</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(1,250</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2,500</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Proceeds from borrowing under revolving credit facility</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">54,500</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Repayment of borrowing under revolving credit facility</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(56,000</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Proceeds from exercise of stock options</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">18,622</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">195</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:7.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net cash used in financing activities</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2,404</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(11,442</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:7.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Effect of foreign exchange rate changes on cash</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(551</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">408</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:9.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net increase (decrease) in cash and cash equivalents</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">33,308</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(6,121</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Cash and cash equivalents at beginning of period</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">110,723</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">23,946</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Cash and cash equivalents at end of period</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">144,031</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">17,825</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Supplemental disclosure of cash flow information:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net cash paid during the period for:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Interest, net of capitalized interest of $2,281 in 2013 and $1,968 in 2012</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2"> &#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(364</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Income taxes</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(3,543</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(1,390</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Supplemental investing and financing information:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net increase in current liabilities for purchase of property and equipment</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">24,039</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,553</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:5.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net decrease in deposits on equipment purchases</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,863</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,900</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">The accompanying notes are an integral part of these unaudited consolidated financial statements.
</FONT></P>

 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">5 </FONT></P>


<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES </B></FONT></P>
 <P STYLE="margin-top:6px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B><A NAME="tx503564_8"></A>NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS </B></FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>

<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>1.</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Basis of Consolidation and Presentation </B></FONT></TD></TR></TABLE>
 <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The unaudited interim consolidated financial statements include the accounts of Patterson-UTI Energy, Inc. (the
&#147;Company&#148;) and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. Except for wholly-owned subsidiaries, the Company has no controlling financial interests in any entity which would
require consolidation. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The unaudited interim consolidated financial statements have been prepared by management of the
Company pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in
the United States of America have been omitted pursuant to such rules and regulations, although the Company believes the disclosures included either on the face of the financial statements or herein are sufficient to make the information presented
not misleading. In the opinion of management, all adjustments which are of a normal recurring nature considered necessary for a fair statement of the information in conformity with accounting principles generally accepted in the United States of
America have been included. The Unaudited Consolidated Balance Sheet as of December&nbsp;31, 2012, as presented herein, was derived from the audited consolidated balance sheet of the Company, but does not include all disclosures required by
accounting principles generally accepted in the United States of America. These unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in the Company&#146;s
Annual Report on Form&nbsp;10-K for the fiscal year ended December&nbsp;31, 2012. The results of operations for the three months ended March&nbsp;31, 2013 are not necessarily indicative of the results to be expected for the full year. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The U.S.&nbsp;dollar is the functional currency for all of the Company&#146;s operations except for its Canadian operations, which uses
the Canadian dollar as its functional currency. The effects of exchange rate changes are reflected in accumulated other comprehensive income, which is a separate component of stockholders&#146; equity. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The carrying values of cash and cash equivalents, trade receivables and accounts payable approximate fair value. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The Company provides a dual presentation of its net income per common share in its unaudited consolidated statements of operations: Basic
net income per common share (&#147;Basic EPS&#148;) and diluted net income per common share (&#147;Diluted EPS&#148;). </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Basic
EPS excludes dilution and is computed by first allocating earnings between common stockholders and holders of non-vested shares of restricted stock. Basic EPS is then determined by dividing the earnings attributable to common stockholders by the
weighted average number of common shares outstanding during the period, excluding non-vested shares of restricted stock. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Diluted EPS is based on the weighted average number of common shares outstanding plus the dilutive effect of potential common shares,
including stock options, non-vested shares of restricted stock and restricted stock units. The dilutive effect of stock options and restricted stock units is determined using the treasury stock method. The dilutive effect of non-vested shares of
restricted stock is based on the more dilutive of the treasury stock method or the two-class method, assuming a reallocation of undistributed earnings to common stockholders after considering the dilutive effect of potential common shares other than
non-vested shares of restricted stock. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">6 </FONT></P>


<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The following table presents information necessary to calculate net income per share for the
three months ended March&nbsp;31, 2013 and 2012 as well as potentially dilutive securities excluded from the weighted average number of diluted common shares outstanding because their inclusion would have been anti-dilutive (in thousands, except per
share amounts): </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="76%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="78%"></TD>
<TD VALIGN="bottom" WIDTH="6%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="6%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Three Months
Ended</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>March&nbsp;31,</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>BASIC EPS:</B></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">56,230</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">97,274</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Adjust for income attributed to holders of non-vested restricted stock</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(482</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(742</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Income attributed to common stockholders</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">55,748</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">96,532</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Weighted average number of common shares outstanding, excluding non-vested shares of restricted stock</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">144,827</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">154,625</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Basic net income per common share</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.38</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.62</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>DILUTED EPS:</B></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Income attributed to common stockholders</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">55,748</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">96,532</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Add incremental earnings related to potential common shares</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">6</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Adjusted income attributed to common stockholders</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">55,754</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">96,532</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Weighted average number of common shares outstanding, excluding non-vested shares of restricted stock</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">144,827</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">154,625</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Add dilutive effect of potential common shares</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,956</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">776</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Weighted average number of diluted common shares outstanding</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">146,783</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">155,401</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Diluted net income per common share</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.38</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.62</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Potentially dilutive securities excluded as anti-dilutive</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,874</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3,229</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE> <P STYLE="font-size:18px;margin-top:0px;margin-bottom:0px">&nbsp;</P>

<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>2.</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Stock-based Compensation </B></FONT></TD></TR></TABLE>
 <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The Company uses share-based payments to compensate employees and non-employee directors. The Company recognizes the
cost of share-based payments under the fair-value-based method. Share-based awards consist of equity instruments in the form of stock options, restricted stock or restricted stock units and have included service and, in certain cases, performance
conditions. The Company&#146;s share-based awards have also included both cash-settled and share-settled performance unit awards. Cash-settled performance unit awards are accounted for as liability awards. Share-settled performance unit awards are
accounted for as equity awards. The Company issues shares of common stock when vested stock options are exercised, when restricted stock is granted and when restricted stock units and share-settled performance unit awards vest. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Stock Options.</I>&nbsp;The Company estimates the grant date fair values of stock options using the Black-Scholes-Merton valuation
model. Volatility assumptions are based on the historic volatility of the Company&#146;s common stock over the most recent period equal to the expected term of the options as of the date the options are granted. The expected term assumptions are
based on the Company&#146;s experience with respect to employee stock option activity. Dividend yield assumptions are based on the expected dividends at the time the options are granted. The risk-free interest rate assumptions are determined by
reference to United States Treasury yields. Weighted-average assumptions used to estimate the grant date fair values for stock options granted for the three month periods ended March&nbsp;31, 2013 and 2012 follow: </FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="76%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="84%"></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Three&nbsp;Months&nbsp;Ended</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>March&nbsp;
31,</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Volatility</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">46.19</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">48.72</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Expected term (in years)</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5.00</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5.00</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Dividend yield</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1.07</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1.00</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Risk-free interest rate</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.72</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.83</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
</TABLE>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">7 </FONT></P>


<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Stock option activity from January&nbsp;1, 2013 to March&nbsp;31, 2013 follows: </FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="76%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="76%"></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Underlying</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Shares</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Weighted</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Average</B></FONT><br><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>Exercise</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Price</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Outstanding at January&nbsp;1, 2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,827,195</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">20.35</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Granted</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">60,000</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">18.63</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Exercised</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(1,150,000</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">16.19</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Cancelled</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2"> &#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Expired</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2"> &#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Outstanding at March&nbsp;31, 2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">6,737,195</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">21.04</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Exercisable at March&nbsp;31, 2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5,738,036</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">21.49</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Restricted Stock.</I>&nbsp;For all restricted stock awards to date, shares of common stock were issued
when the awards were made. Non-vested shares are subject to forfeiture for failure to fulfill service conditions and, in certain cases, performance conditions. Non-forfeitable dividends are paid on non-vested shares of restricted stock. The Company
uses the straight-line method to recognize periodic compensation cost over the vesting period. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Restricted stock activity from
January&nbsp;1, 2013 to March&nbsp;31, 2013 follows: </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="76%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="76%"></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Shares</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Weighted</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Average</B></FONT><br><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>Grant&nbsp;Date</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Fair&nbsp;Value</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Non-vested restricted stock outstanding at January&nbsp;1, 2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,279,146</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">20.03</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Granted</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">18,000</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">18.63</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Vested</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(56,668</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">22.20</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Forfeited</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(15,570</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">19.68</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Non-vested restricted stock outstanding at March 31, 2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,224,908</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">19.92</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Restricted Stock Units.</I>&nbsp;For all restricted stock unit awards made to date, shares of common
stock are not issued until the units vest. Restricted stock units are subject to forfeiture for failure to fulfill service conditions. Non-forfeitable cash dividend equivalents are paid on non-vested restricted stock units. The Company uses the
straight-line method to recognize periodic compensation cost over the vesting period. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Restricted stock unit activity from
January&nbsp;1, 2013 to March&nbsp;31, 2013 follows: </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="76%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="79%"></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Shares</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Weighted</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Average</B></FONT><br><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>Grant&nbsp;Date</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Fair&nbsp;Value</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Non-vested restricted stock units outstanding at January&nbsp;1, 2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">17,670</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">20.08</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Granted</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2"> &#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Vested</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2"> &#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Forfeited</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2"> &#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Non-vested restricted stock units outstanding at March 31, 2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">17,670</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">20.08</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%;padding-bottom:0px; "><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Performance Unit Awards.</I> In 2010, 2011 and 2012, the Company granted
stock-settled performance unit awards to certain executive officers (the &#147;Stock-Settled Performance Units&#148;). The Stock-Settled Performance Units provide for the recipients to receive a grant of shares of stock upon the achievement of
certain performance goals established by the Compensation Committee during the performance period. The performance period for the Stock-Settled Performance Units is the three year period commencing on April&nbsp;1 of the year of grant, but can
extend for an additional two years in certain circumstances. The performance goals for the Stock-Settled Performance Units are tied to the Company&#146;s total shareholder return for the performance period as compared to total shareholder return for
a peer group determined by the Compensation Committee. These goals are considered to be market conditions under the relevant accounting standards and the market conditions were factored into the determination of the fair value of the performance
units. Generally, the recipients will receive a target number of shares if the Company&#146;s total shareholder return is positive and, when compared to the peer group, is at the 50</FONT><FONT STYLE="font-family:Times New Roman" SIZE="1"><SUP
STYLE="vertical-align:baseline; position:relative; bottom:.8ex">th</SUP></FONT><FONT STYLE="font-family:Times New Roman" SIZE="2"> percentile and two times the target if at the 75</FONT><FONT STYLE="font-family:Times New Roman" SIZE="1"><SUP
STYLE="vertical-align:baseline; position:relative; bottom:.8ex">th</SUP></FONT><FONT STYLE="font-family:Times New Roman" SIZE="2"> percentile or higher. If the Company&#146;s total shareholder return is positive, and, when compared to the peer
group, is at the 25</FONT><FONT STYLE="font-family:Times New Roman" SIZE="1"><SUP STYLE="vertical-align:baseline; position:relative; bottom:.8ex">th</SUP></FONT><FONT STYLE="font-family:Times New Roman" SIZE="2"> percentile, the recipients will only
receive one-half of the target number of shares. The grant of shares when achievement is between the 25</FONT><FONT STYLE="font-family:Times New Roman" SIZE="1"><SUP STYLE="vertical-align:baseline; position:relative; bottom:.8ex">th</SUP></FONT><FONT
STYLE="font-family:Times New Roman" SIZE="2"> and 75</FONT><FONT STYLE="font-family:Times New Roman" SIZE="1"><SUP STYLE="vertical-align:baseline; position:relative; bottom:.8ex">th</SUP></FONT><FONT STYLE="font-family:Times New Roman" SIZE="2">
percentile will be determined on a </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">8 </FONT></P>


<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px;padding-bottom:0px; "><FONT STYLE="font-family:Times New Roman" SIZE="2">
pro-rata basis. The target number of shares with respect to the 2010 Stock-Settled Performance Units was 178,750. The performance period for the 2010 Stock-Settled Performance Units ended on
March&nbsp;31, 2013 and the Company&#146;s total shareholder return was at the 93</FONT><FONT STYLE="font-family:Times New Roman" SIZE="1"><SUP STYLE="vertical-align:baseline; position:relative; bottom:.8ex">rd</SUP></FONT><FONT
STYLE="font-family:Times New Roman" SIZE="2"> percentile. In April 2013, 357,500 shares were issued to settle the 2010 Stock-Settled Performance Units. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">The total target number of shares with respect to the Stock-Settled Performance Units is set forth below: </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="84%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="64%"></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Performance</B></FONT><br><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>Unit Awards</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2011</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Performance</B></FONT><br><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>Unit Awards</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2010</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Performance</B></FONT><br><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>Unit Awards</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Target number of shares</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">192,000</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">144,375</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">178,750</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Because the Stock-Settled Performance Units are stock-settled awards, they are accounted for as equity
awards and measured at fair value on the date of grant using a Monte Carlo simulation model. The fair value of the Stock-Settled Performance Units is set forth below (in thousands): </FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="84%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="64%"></TD>
<TD VALIGN="bottom" WIDTH="8%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="8%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="8%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Performance</B></FONT><br><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>Unit Awards</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2011</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Performance</B></FONT><br><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>Unit Awards</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2010</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Performance</B></FONT><br><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>Unit Awards</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Fair value at date of grant</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3,065</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5,569</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3,117</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">These fair value amounts are charged to expense on a straight-line basis over the performance period.
Compensation expense associated with the Stock-Settled Performance Units is shown below (in thousands): </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="84%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="64%"></TD>
<TD VALIGN="bottom" WIDTH="9%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="9%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="9%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Performance</B></FONT><br><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>Unit Awards</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2011</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Performance</B></FONT><br><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>Unit Awards</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2010</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Performance</B></FONT><br><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>Unit Awards</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Three months ended March&nbsp;31, 2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">255</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">464</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">260</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Three months ended March&nbsp;31, 2012</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">NA</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">464</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">260</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
</TABLE> <P STYLE="font-size:18px;margin-top:0px;margin-bottom:0px">&nbsp;</P>

<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>3.</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Property and Equipment </B></FONT></TD></TR></TABLE>
 <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Property and equipment consisted of the following at March&nbsp;31, 2013 and December&nbsp;31, 2012 (in thousands):
</FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="76%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="72%"></TD>
<TD VALIGN="bottom" WIDTH="6%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="6%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>March&nbsp;31,</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>December&nbsp;31,</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Equipment</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5,545,029</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5,387,490</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Oil and natural gas properties</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">164,824</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">156,834</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Buildings</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">67,585</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">66,490</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Land</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">11,899</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">10,413</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5,789,337</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5,621,227</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Less accumulated depreciation and depletion</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2,106,587</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2,005,844</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Property and equipment, net</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3,682,750</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3,615,383</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">9 </FONT></P>


<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>



<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>4.</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Business Segments </B></FONT></TD></TR></TABLE>
 <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The Company&#146;s revenues, operating profits and identifiable assets are primarily attributable to three business
segments: (i)&nbsp;contract drilling of oil and natural gas wells, (ii)&nbsp;pressure pumping services and (iii)&nbsp;the investment, on a non-operating working interest basis, in oil and natural gas properties. Each of these segments represents a
distinct type of business. These segments have separate management teams which report to the Company&#146;s chief operating decision maker. The results of operations in these segments are regularly reviewed by the chief operating decision maker for
purposes of determining resource allocation and assessing performance. Separate financial data for each of our business segments is provided in the table below (in thousands): </FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="76%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="78%"></TD>
<TD VALIGN="bottom" WIDTH="4%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="4%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Three Months
Ended</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>March&nbsp;31,</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Revenues:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Contract drilling</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">420,233</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">490,703</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Pressure pumping</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">231,160</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">241,722</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Oil and natural gas</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">16,785</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">14,717</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total segment revenues</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">668,178</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">747,142</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Elimination of intercompany revenues (a)</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(1,139</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(1,221</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total revenues</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">667,039</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">745,921</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Income before income taxes:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Contract drilling</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">72,549</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">111,771</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Pressure pumping</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">28,515</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">46,787</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Oil and natural gas</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">6,241</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,518</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">107,305</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">166,076</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Corporate and other</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(12,248</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(10,812</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net gain (loss) on asset disposals (b)</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(125</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,400</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Interest income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">173</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">54</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Interest expense</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(6,766</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(4,582</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Other</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">19</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">55</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Income before income taxes</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">88,358</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">153,191</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="76%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="74%"></TD>
<TD VALIGN="bottom" WIDTH="4%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="4%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>March&nbsp;31,</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>December&nbsp;31,</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Identifiable assets:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Contract drilling</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3,607,349</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3,538,289</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Pressure pumping</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">802,050</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">784,128</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Oil and natural gas</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">55,212</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">54,188</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Corporate and other (c)</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">192,621</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">180,306</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total assets</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4,657,232</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4,556,911</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE> <P STYLE="line-height:8px;margin-top:0px;margin-bottom:2px;border-bottom:0.5pt solid #000000;width:10%">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD></TD>
<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD WIDTH="95%"></TD></TR>


<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">(a)</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Consists of contract drilling intercompany revenues for drilling services provided to the oil and natural gas exploration and production segment.</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">(b)</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net gains or losses associated with the disposal of assets relate to corporate strategy decisions of the executive management group. Accordingly, the related gains or losses have
been separately presented and excluded from the results of specific segments.</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">(c)</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Corporate and other assets primarily include cash on hand and certain deferred tax assets.</FONT></TD></TR>
</TABLE>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">10 </FONT></P>



<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>



<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>5.</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Goodwill and Intangible Assets </B></FONT></TD></TR></TABLE>
 <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Goodwill </I>&#151; Goodwill by operating segment as of March&nbsp;31, 2013 and changes for the three months then
ended are as follows (in thousands): </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="84%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="72%"></TD>
<TD VALIGN="bottom" WIDTH="4%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="4%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="4%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Contract</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Drilling</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Pressure</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Pumping</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Total</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Balance December&nbsp;31, 2012</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">86,234</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">67,575</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">153,809</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Changes to goodwill</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Balance March&nbsp;31, 2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">86,234</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">67,575</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">153,809</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">There were no accumulated impairment losses as of March&nbsp;31, 2013 or December&nbsp;31, 2012.
</FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Goodwill is evaluated at least annually on December&nbsp;31, or when circumstances require, to determine if the fair value of
recorded goodwill has decreased below its carrying value. For purposes of impairment testing, goodwill is evaluated at the reporting unit level. The Company&#146;s reporting units for impairment testing have been determined to be its operating
segments. The Company first determines whether it is more likely than not that the fair value of a reporting unit is less than its carrying value after considering qualitative, market and other factors. If so, then goodwill impairment is determined
using a two-step impairment test. The first step is to compare the fair value of an entity&#146;s reporting units to the respective carrying value of those reporting units. If the carrying value of a reporting unit exceeds its fair value, the second
step of the impairment test is performed whereby the fair value of the reporting unit is allocated to its identifiable tangible and intangible assets and liabilities with any remaining fair value representing the fair value of goodwill. If this
resulting fair value of goodwill is less than the carrying value of goodwill, an impairment loss would be recognized in the amount of the shortfall. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2"><I>Intangible Assets </I>&#151; Intangible assets were recorded in the pressure pumping operating segment in connection with the fourth quarter 2010 acquisition of the assets of a pressure pumping
business. As a result of the purchase price allocation, the Company recorded intangible assets related to a non-compete agreement and the customer relationships acquired. These intangible assets were recorded at fair value on the date of
acquisition. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The non-compete agreement has a term of three years from October&nbsp;1, 2010. The value of this agreement was
estimated using a with and without scenario where cash flows were projected through the term of the agreement assuming the agreement is in place and compared to cash flows assuming the non-compete agreement was not in place. The intangible asset
associated with the non-compete agreement is being amortized on a straight-line basis over the three-year term of the agreement. Amortization expense of approximately $117,000 was recorded in the three months ended March&nbsp;31, 2013 and 2012.
</FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The value of the customer relationships was estimated using a multi-period excess earnings model to determine the present
value of the projected cash flows associated with the customers in place at the time of the acquisition and taking into account a contributory asset charge. The resulting intangible asset is being amortized on a straight-line basis over seven years.
Amortization expense of approximately $911,000 was recorded in the three months ended March&nbsp;31, 2013 and 2012 associated with customer relationships. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">The following table presents the gross carrying amount and accumulated amortization of intangible assets as of March&nbsp;31, 2013 and December&nbsp;31, 2012 (in thousands): </FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="53%"></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="2%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="10" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>March&nbsp;31, 2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="10" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>December&nbsp;31, 2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Gross<BR>Carrying</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Amount</B></FONT></TD>

<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Accumulated</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Amortization</B></FONT></TD>

<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Net<BR>Carrying</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Amount</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Gross<BR>Carrying</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Amount</B></FONT></TD>

<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Accumulated</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Amortization</B></FONT></TD>

<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Net<BR>Carrying</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Amount</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Non-compete agreement</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,400</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(1,167</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">233</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,400</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(1,050</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">350</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Customer relationships</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">25,500</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(9,107</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">16,393</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">25,500</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(8,196</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">17,304</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total intangible assets</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">26,900</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(10,274</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">16,626</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">26,900</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(9,246</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">17,654</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">11 </FONT></P>



<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>



<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>6.</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Accrued Expenses </B></FONT></TD></TR></TABLE>
 <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Accrued expenses consisted of the following at March&nbsp;31, 2013 and December&nbsp;31, 2012 (in thousands):
</FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="76%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="74%"></TD>
<TD VALIGN="bottom" WIDTH="6%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="6%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>March&nbsp;31,</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>December&nbsp;31,</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Salaries, wages, payroll taxes and benefits</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">39,276</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">55,430</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Workers&#146; compensation liability</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">66,755</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">68,441</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Property, sales, use and other taxes</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,211</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">9,749</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Insurance, other than workers&#146; compensation</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">6,104</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">10,419</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Accrued interest payable</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">14,518</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,664</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Deferred revenue&#151;current</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,523</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Other</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,653</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5,406</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">141,517</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">158,632</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Deferred revenue was recorded in the fourth quarter of 2010 in the purchase price allocation associated
with the Company&#146;s acquisition of a pressure pumping business. The deferred revenue related to out-of-market pricing agreements that were in place at the acquired business at the time of the acquisition. The deferred revenue was recognized as
pressure pumping revenue over the term of the pricing agreements, which have now expired. Deferred revenue of approximately $1.5 million and $1.8 million was recognized in the three months ended March&nbsp;31, 2013 and 2012, respectively, related to
these pricing agreements. </FONT></P> <P STYLE="font-size:18px;margin-top:0px;margin-bottom:0px">&nbsp;</P>

<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>7.</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Asset Retirement Obligation </B></FONT></TD></TR></TABLE>
 <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The Company records a liability for the estimated costs to be incurred in connection with the abandonment of oil and
natural gas properties in the future. This liability is included in the caption &#147;other&#148; in the liabilities section of the consolidated balance sheet. The following table describes the changes to the Company&#146;s asset retirement
obligations during the three months ended March&nbsp;31, 2013 and 2012 (in thousands): </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="76%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="82%"></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Three&nbsp;Months&nbsp;Ended</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>March&nbsp;
31,</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Balance at beginning of year</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4,422</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3,455</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Liabilities incurred</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">71</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">106</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Liabilities settled</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(13</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(68</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Accretion expense</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">41</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">37</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Revision in estimated costs of plugging oil and natural gas wells</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">550</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Asset retirement obligation at end of period</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4,521</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4,080</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE> <P STYLE="font-size:18px;margin-top:0px;margin-bottom:0px">&nbsp;</P>

<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>8.</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Long Term Debt </B></FONT></TD></TR></TABLE>
 <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Credit Facilities -</I> On September&nbsp;27, 2012, the Company entered into a Credit Agreement (the &#147;Credit
Agreement&#148;) with Wells Fargo Bank, N.A., as administrative agent, letter of credit issuer, swing line lender and lender, and each of the other lenders party thereto. The Credit Agreement is a committed senior unsecured credit facility that
includes a revolving credit facility and a term loan facility. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The revolving credit facility permits aggregate borrowings of
up to $500 million outstanding at any time. The revolving credit facility contains a letter of credit facility that is limited to $150 million and a swing line facility that is limited to $40 million, in each case outstanding at any time.
</FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The term loan facility provides for a loan of $100 million, which was drawn on December&nbsp;24, 2012. The term loan facility
is payable in quarterly principal installments, which commenced December&nbsp;27, 2012. The installment amounts vary from 1.25% of the original principal amount for each of the first four quarterly installments, 2.50% of the original principal
amount for each of the subsequent eight quarterly installments, 5.00% of the original principal amount for the subsequent four quarterly installments and 13.75% of the original principal amount for the final four quarterly installments. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Subject to customary conditions, the Company may request that the lenders&#146; aggregate commitments with respect to the revolving
credit facility and/or the term loan facility be increased by up to $100 million, not to exceed total commitments of $700 million. The maturity date under the Credit Agreement is September&nbsp;27, 2017 for both the revolving facility and the term
facility. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">12 </FONT></P>



<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Loans under the Credit Agreement bear interest by reference, at the Company&#146;s election,
to the LIBOR rate or base rate, provided, that swing line loans bear interest by reference only to the base rate. The applicable margin on LIBOR rate loans varies from 2.25% to 3.25% and the applicable margin on base rate loans varies from 1.25% to
2.25%, in each case determined based upon the Company&#146;s debt to capitalization ratio. As of March&nbsp;31, 2013, the applicable margin on LIBOR rate loans was 2.25% and the applicable margin on base rate loans was 1.25%. A letter of credit fee
is payable by the Company equal to the applicable margin for LIBOR rate loans times the daily amount available to be drawn under outstanding letters of credit. The commitment fee rate payable to the lenders for the unused portion of the credit
facility is 0.50%. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Each domestic subsidiary of the Company other than immaterial subsidiaries has unconditionally guaranteed
all existing and future indebtedness and liabilities of the other guarantors and the Company arising under the Credit Agreement and other loan documents. Such guarantees also cover obligations of the Company and any subsidiary of the Company arising
under any interest rate swap contract with any person while such person is a lender under the Credit Agreement. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The Credit
Agreement requires compliance with two financial covenants. The Company must not permit its debt to capitalization ratio to exceed 45%. The Credit Agreement generally defines the debt to capitalization ratio as the ratio of (a)&nbsp;total borrowed
money indebtedness to (b)&nbsp;the sum of such indebtedness plus consolidated net worth, with consolidated net worth determined as of the last day of the most recently ended fiscal quarter. The Company also must not permit the interest coverage
ratio as of the last day of a fiscal quarter to be less than 3.00 to 1.00. The Credit Agreement generally defines the interest coverage ratio as the ratio of earnings before interest, taxes, depreciation and amortization (&#147;EBITDA&#148;) of the
four prior fiscal quarters to interest charges for the same period. The Company was in compliance with these covenants at March&nbsp;31, 2013. The Credit Agreement also contains customary representations, warranties and affirmative and negative
covenants. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Events of default under the Credit Agreement include failure to pay principal or interest when due, failure to
comply with the financial and operational covenants, as well as a cross default event, loan document enforceability event, change of control event and bankruptcy and other insolvency events. If an event of default occurs and is continuing, then a
majority of the lenders have the right, among others, to (i)&nbsp;terminate the commitments under the Credit Agreement, (ii)&nbsp;accelerate and require the Company to repay all the outstanding amounts owed under any loan document (provided that in
limited circumstances with respect to insolvency and bankruptcy of the Company, such acceleration is automatic), and (iii)&nbsp;require the Company to cash collateralize any outstanding letters of credit. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">As of March&nbsp;31, 2013, the Company had $97.5 million principal amount outstanding under the term loan facility at an interest rate of
2.625% and no amounts outstanding under the revolving credit facility. The Company had $39.8 million in letters of credit outstanding at March&nbsp;31, 2013 and, as a result, had available borrowing capacity of approximately $460 million at that
date. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Senior Notes &#150; </I>On October&nbsp;5, 2010, the Company completed the issuance and sale of $300 million in
aggregate principal amount of its 4.97% Series A Senior Notes due October&nbsp;5, 2020 (the &#147;Series A Notes&#148;) in a private placement. The Series A Notes bear interest at a rate of 4.97%&nbsp;per annum. The Company will pay interest on the
Series A Notes on April&nbsp;5 and October&nbsp;5 of each year. The Series A Notes will mature on October&nbsp;5, 2020. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">On
June&nbsp;14, 2012, the Company completed the issuance and sale of $300 million in aggregate principal amount of its 4.27% Series B Senior Notes due June&nbsp;14, 2022 (the &#147;Series B Notes&#148;) in a private placement. The Series B Notes bear
interest at a rate of 4.27%&nbsp;per annum. The Company will pay interest on the Series B Notes on April&nbsp;5 and October&nbsp;5 of each year. The Series B Notes will mature on June&nbsp;14, 2022. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The Series A Notes and Series B Notes are senior unsecured obligations of the Company which rank equally in right of payment with all
other unsubordinated indebtedness of the Company. The Series A Notes and Series B Notes are guaranteed on a senior unsecured basis by each of the existing domestic subsidiaries of the Company other than immaterial subsidiaries. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The Series A Notes and Series B Notes are prepayable at the Company&#146;s option, in whole or in part, provided that in the case of a
partial prepayment, prepayment must be in an amount not less than 5% of the aggregate principal amount of the notes then outstanding, at any time and from time to time at 100% of the principal amount prepaid, plus accrued and unpaid interest to the
prepayment date, plus a &#147;make-whole&#148; premium as specified in the note purchase agreements. The Company must offer to prepay the notes upon the occurrence of any change of control. In addition, the Company must offer to prepay the notes
upon the occurrence of certain asset dispositions if the proceeds therefrom are not timely reinvested in productive assets. If any offer to prepay is accepted, the purchase price of each prepaid note is 100% of the principal amount thereof, plus
accrued and unpaid interest thereon to the prepayment date. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">13 </FONT></P>



<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The respective note purchase agreements require compliance with two financial covenants. The
Company must not permit its debt to capitalization ratio to exceed 50% at any time. The note purchase agreements generally define the debt to capitalization ratio as the ratio of (a)&nbsp;total borrowed money indebtedness to (b)&nbsp;the sum of such
indebtedness plus consolidated net worth, with consolidated net worth determined as of the last day of the most recently ended fiscal quarter. The Company also must not permit the interest coverage ratio as of the last day of a fiscal quarter to be
less than 2.50 to 1.00. The note purchase agreements generally define the interest coverage ratio as the ratio of EBITDA for the four prior fiscal quarters to interest charges for that same period. The Company was in compliance with these covenants
at March&nbsp;31, 2013. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Events of default under the note purchase agreements include failure to pay principal or interest
when due, failure to comply with the financial and operational covenants, a cross default event, a judgment in excess of a threshold event, the guaranty agreement ceasing to be enforceable, the occurrence of certain ERISA events, a change of control
event and bankruptcy and other insolvency events. If an event of default under the note purchase agreements occurs and is continuing, then holders of a majority in principal amount of the respective notes have the right to declare all the notes
then-outstanding to be immediately due and payable. In addition, if the Company defaults in payments on any note, then until such defaults are cured, the holder thereof may declare all the notes held by it pursuant to the note purchase agreement to
be immediately due and payable. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The Company incurred approximately $10.8 million in debt issuance costs during 2010 in
connection with the previous credit agreement and the Series A Notes. During the third quarter of 2012, $978,000 of these costs were charged to interest expense due to the early termination of the previous credit agreement. The Company incurred
approximately $7.6 million in debt issuance costs during 2012 in connection with the Series B Notes and the Credit Agreement. These costs were deferred and are recognized as interest expense over the term of the underlying debt. Interest expense
related to the amortization of debt issuance costs was approximately $547,000 and $604,000 for the three months ended March&nbsp;31, 2013 and 2012. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">Presented below is a schedule of the principal repayment requirements of long-term debt by fiscal year as of March&nbsp;31, 2013 (in thousands): </FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="68%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="87%"></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Year ending December&nbsp;31,</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5,000</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">2014</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">10,000</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">2015</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">12,500</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">2016</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">28,750</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">2017</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">41,250</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Thereafter</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">600,000</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">697,500</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE> <P STYLE="font-size:18px;margin-top:0px;margin-bottom:0px">&nbsp;</P>

<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>9.</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Commitments, Contingencies and Other Matters </B></FONT></TD></TR></TABLE>
 <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">As of March&nbsp;31, 2013, the Company maintained letters of credit in the aggregate amount of $39.8 million for the
benefit of various insurance companies as collateral for retrospective premiums and retained losses which could become payable under the terms of the underlying insurance contracts. These letters of credit expire annually at various times during the
year and are typically renewed. As of March&nbsp;31, 2013, no amounts had been drawn under the letters of credit. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">As of
March&nbsp;31, 2013, the Company had commitments to purchase approximately $128 million of major equipment for its drilling and pressure pumping businesses. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">The Company&#146;s pressure pumping business has entered into agreements to purchase minimum quantities of proppants and chemicals from certain vendors. These agreements expire in 2016 and 2017. As of
March&nbsp;31, 2013, the remaining obligation under these agreements is approximately $35.0 million, of which materials with a total purchase price of approximately $7.2 million are expected to be delivered during the last three quarters of 2013. In
the event that the required minimum quantities are not purchased during any contract year, the Company would be required to make a liquidated damages payment to the respective vendor for any shortfall. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">14 </FONT></P>



<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">In November of 2011, the Company&#146;s pressure pumping business entered into an agreement
with a proppant vendor to advance, on a non-revolving basis, up to $12.0 million to such vendor to finance the construction of certain processing facilities. This advance is secured by the underlying processing facilities and bears interest at an
annual rate of 5.0%. Repayment of the advance is to be made through discounts applied to purchases from the vendor and repayment of all amounts advanced must be made no later than October&nbsp;1, 2017. As of March&nbsp;31, 2013, advances of
approximately $11.8 million had been made under this agreement and repayments of approximately $531,000 had been received resulting in a balance outstanding of approximately $11.2 million. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The Company is party to various legal proceedings arising in the normal course of its business. The Company does not believe that the
outcome of these proceedings, either individually or in the aggregate, will have a material adverse effect on its financial condition, results of operations or cash flows. </FONT></P>
<P STYLE="font-size:18px;margin-top:0px;margin-bottom:0px">&nbsp;</P>

<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>10.</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Stockholders&#146; Equity </B></FONT></TD></TR></TABLE>
 <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Cash Dividends&#151;</I>The Company paid cash dividends during the three months ended March&nbsp;31, 2012 and 2013
as follows: </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="76%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="76%"></TD>
<TD VALIGN="bottom" WIDTH="8%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="8%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom" NOWRAP><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012:</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Per&nbsp;Share</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Total</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1">(in&nbsp;thousands)</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Paid on March&nbsp;30, 2012</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.05</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,788</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
</TABLE> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="76%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="76%"></TD>
<TD VALIGN="bottom" WIDTH="8%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="8%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom" NOWRAP><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013:</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Per&nbsp;Share</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Total</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1">(in&nbsp;thousands)</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Paid on March&nbsp;29, 2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.05</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,312</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">On April 24, 2013, the Company&#146;s Board of Directors approved a cash dividend on its common stock in
the amount of $0.05 per share to be paid on June 28, 2013 to holders of record as of June 14, 2013. The amount and timing of all future dividend payments, if any, are subject to the discretion of the Board of Directors and will depend upon business
conditions, results of operations, financial condition, terms of the Company&#146;s credit facilities and other factors. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">On
July&nbsp;25, 2012, the Company&#146;s Board of Directors approved a stock buyback program authorizing purchases of up to $150 million of the Company&#146;s common stock in open market or privately negotiated transactions. During the three months
ended March&nbsp;31, 2013, no shares were purchased under the stock buyback program. As of March&nbsp;31, 2013, the Company has remaining authorization to purchase approximately $51.1 million of the Company&#146;s outstanding common stock under the
stock buyback program. Shares purchased under the buyback programs are accounted for as treasury stock. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The Company purchased
637,624 shares of treasury stock from employees during the three months ended March&nbsp;31, 2013. These shares were purchased at fair market value upon the exercise of stock options to provide the employees with the funds necessary to pay the
exercise price of the stock option and to satisfy payroll tax withholding obligations. The total purchase price for these shares was approximately $15.2 million. These purchases were made pursuant to the terms of the Patterson-UTI Energy, Inc. 2005
Long-Term Incentive Plan and not pursuant to the stock buyback program. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Accumulated other comprehensive income is composed
solely of amounts related to foreign currency translation. </FONT></P> <P STYLE="font-size:18px;margin-top:0px;margin-bottom:0px">&nbsp;</P>

<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>11.</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Income Taxes </B></FONT></TD></TR></TABLE>
 <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">On January&nbsp;1, 2010, the Company converted its Canadian operations from a Canadian branch to a controlled foreign
corporation for Federal income tax purposes. Because the statutory tax rates in Canada are lower than those in the United States, this transaction triggered a $5.1 million reduction in the Company&#146;s deferred tax liabilities, which is being
amortized as a reduction to deferred income tax expense over the weighted average remaining useful life of the Canadian assets. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">As a result of the above conversion, the Company&#146;s Canadian assets are no longer directly subject to United States taxation,
provided that the related unremitted earnings are permanently reinvested in Canada. Effective January&nbsp;1, 2010, the Company has elected to permanently reinvest these unremitted earnings in Canada, and intends to do so for the foreseeable future.
As a result, no deferred United States federal or state income taxes have been provided on such unremitted foreign earnings, which totaled approximately $33.7 million as of March&nbsp;31, 2013. The unrecognized deferred tax liability associated with
these earnings was approximately $5.1 million, net of available foreign tax credits. This liability would be recognized if the Company received a dividend of these unremitted earnings. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">15 </FONT></P>



<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>



<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>12.</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Fair Values of Financial Instruments </B></FONT></TD></TR></TABLE>
 <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The carrying values of cash and cash equivalents, trade receivables and accounts payable approximate fair value due to
the short-term maturity of these items. These fair value estimates are considered Level 1 fair value estimates in the fair value hierarchy of fair value accounting. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">The estimated fair value of the Company&#146;s outstanding debt balances (including current portion) as of March&nbsp;31, 2013 and December&nbsp;31, 2012 is set forth below (in thousands): </FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="92%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="64%"></TD>
<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>March&nbsp;31, 2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>December&nbsp;31, 2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Carrying</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Value</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Fair</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Value</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Carrying</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Value</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Fair</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Value</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Borrowings under Credit Agreement:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:3.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Term loan facility</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">97,500</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">97,500</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">98,750</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">98,750</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">4.97% Series A Senior Notes</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">300,000</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">321,743</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">300,000</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">329,281</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">4.27% Series B Senior Notes</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">300,000</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">303,342</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">300,000</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">310,591</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total debt</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">697,500</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">722,585</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">698,750</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">738,622</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The carrying values of the balances outstanding under the term loan approximate their fair values as this
instrument has a floating interest rate. The fair value of the 4.97% Series A Senior Notes and the 4.27% Series B Senior Notes at March&nbsp;31, 2013 and December&nbsp;31, 2012 are based on discounted cash flows associated with the respective notes
using current market rates of interest at those respective dates.&nbsp;For the 4.97% Series A Senior Notes, the current market rates used in measuring this fair value were 3.49% at March&nbsp;31, 2013 and 3.36% at December&nbsp;31, 2012.&nbsp;For
the 4.27% Series B Senior Notes, the current market rate used in measuring this fair value was 3.85% at March&nbsp;31, 2013 and 3.70% at December&nbsp;31, 2012. These fair value estimates are based on observable market inputs and are considered
Level 2 fair value estimates in the fair value hierarchy of fair value accounting. </FONT></P> <P STYLE="font-size:18px;margin-top:0px;margin-bottom:0px">&nbsp;</P>

<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>13.</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Recently Issued Accounting Standards </B></FONT></TD></TR></TABLE>
 <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">In February 2013, the FASB issued an accounting standards update that requires additional disclosures regarding
reclassifications out of accumulated other comprehensive income. This requirement is effective for fiscal years, and interim periods within those years, beginning after December&nbsp;15, 2012, and became effective for the Company in the quarter
ended March&nbsp;31, 2013. The adoption of this update did not have a material impact on the Company&#146;s disclosures included in its consolidated financial statements. The Company includes in accumulated other comprehensive income the cumulative
translation adjustment of its foreign subsidiary. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">In February 2013, the FASB issued an accounting standards update to provide
guidance for the recognition, measurement, and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of the update is fixed at the reporting date, except for
obligations addressed within existing guidance in U.S. GAAP. The guidance requires an entity to measure those obligations as the sum of the amount the reporting entity agreed to pay on the basis of its arrangement among its co-obligors and any
additional amount the reporting entity expects to pay on behalf of its co-obligors. The update also requires an entity to disclose the nature and amount of the obligation as well as other information about those obligations. The requirements in this
update are effective during interim and annual periods beginning after December&nbsp;15, 2013. The adoption of this update is not expected to have a material impact on the Company&#146;s consolidated financial statements. </FONT></P>

 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">16 </FONT></P>



<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>DISCLOSURE REGARDING FORWARD LOOKING STATEMENTS </B></FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">This Quarterly Report on Form 10-Q (this &#147;Report&#148;) and other public filings and press releases by us contain
&#147;forward-looking statements&#148; within the meaning of the Securities Act of 1933, as amended (the &#147;Securities Act&#148;), and the Securities Exchange Act of 1934, as amended (the &#147;Exchange Act&#148;), and the Private Securities
Litigation Reform Act of 1995, as amended. These &#147;forward-looking statements&#148; involve risk and uncertainty. These forward-looking statements include, without limitation, statements relating to: liquidity; revenue expectations and backlog;
financing of operations; continued volatility of oil and natural gas prices; source and sufficiency of funds required for building new equipment and additional acquisitions (if further opportunities arise); impact of inflation; demand for our
services; and other matters. Our forward-looking statements can be identified by the fact that they do not relate strictly to historic or current facts and often use words such as &#147;believes,&#148; &#147;budgeted,&#148; &#147;continue,&#148;
&#147;expects,&#148; &#147;estimates,&#148; &#147;project,&#148; &#147;will,&#148; &#147;could,&#148; &#147;may,&#148; &#147;plans,&#148; &#147;intends,&#148; &#147;strategy,&#148; or &#147;anticipates,&#148; or the negative thereof and other words
and expressions of similar meaning. The forward-looking statements are based on certain assumptions and analyses we make in light of our experience and our perception of historical trends, current conditions, expected future developments and other
factors we believe are appropriate in the circumstances. Although we believe that the expectations reflected in such forward-looking statements are reasonable, we can give no assurance that such expectations will prove to have been correct.
Forward-looking statements may be made orally or in writing, including, but not limited to, Management&#146;s Discussion and Analysis of Financial Condition and Results of Operations included in this Report and other sections of our filings with the
United States Securities and Exchange Commission (the &#147;SEC&#148;) under the Exchange Act and the Securities Act. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Forward-looking statements are not guarantees of future performance and a variety of factors could cause actual results to differ
materially from the anticipated or expected results expressed in or suggested by these forward-looking statements. Factors that might cause or contribute to such differences include, but are not limited to, global economic conditions, volatility in
customer spending and in oil and natural gas prices that could adversely affect demand for our services and their associated effect on rates, utilization, margins and planned capital expenditures, excess availability of land drilling rigs and
pressure pumping equipment, including as a result of reactivation or construction, adverse industry conditions, adverse credit and equity market conditions, difficulty in integrating acquisitions, shortages of labor, equipment, supplies and
materials, weather, loss of key customers, liabilities from operations for which we do not have and receive full indemnification or insurance, governmental regulation and ability to retain management and field personnel. Refer to &#147;Risk
Factors&#148; contained in Part 1 of our Annual Report on Form 10-K for the year ended December&nbsp;31, 2012 for a more complete discussion of these and other factors that might affect our performance and financial results. You are cautioned not to
place undue reliance on any of our forward-looking statements. These forward-looking statements are intended to relay our expectations about the future, and speak only as of the date they are made. We undertake no obligation to publicly update or
revise any forward-looking statement, whether as a result of new information, changes in internal estimates or otherwise, except as required by law. </FONT></P> <P STYLE="margin-top:18px;margin-bottom:0px"><FONT
STYLE="font-family:Times New Roman" SIZE="2"><A NAME="tx503564_9"></A><B>ITEM&nbsp;2.</B><B><I>&nbsp;Management&#146;s Discussion and Analysis of Financial Condition and Results of Operations</I></B> </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Management Overview</I>&nbsp;&#151; We are a leading provider of services to the North American oil and natural gas industry. Our
services primarily involve the drilling, on a contract basis, of land-based oil and natural gas wells and pressure pumping services. In addition to the aforementioned services, we also invest, on a non-operating working interest basis, in oil and
natural gas properties. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">We have a drilling fleet that consists of more than 300 marketable land-based drilling rigs. There
continues to be uncertainty with respect to the global economic environment and crude oil and natural gas prices remain volatile. During the first quarter of 2013, our average number of rigs operating in the United States was 188, compared to an
average of 224 drilling rigs operating during the same period in 2012. During the first quarter of 2013, our average number of rigs operating in Canada was 11 compared to 13 drilling rigs operating during the first quarter of 2012. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%;padding-bottom:0px; "><FONT STYLE="font-family:Times New Roman" SIZE="2">We have addressed our customers&#146; needs for drilling wells in the newer horizontal shale and other
unconventional resource plays by expanding our areas of operation and improving the capabilities of our drilling fleet during the last several years. As of March&nbsp;31, 2013, we have completed 117 new APEX<FONT
STYLE="font-family:Times New Roman" SIZE="1"><SUP STYLE="vertical-align:baseline; position:relative; bottom:.8ex">&reg;</SUP></FONT> rigs and made performance and safety improvements to existing high capacity rigs. We have plans to complete 9
additional new APEX<FONT STYLE="font-family:Times New Roman" SIZE="1"><SUP STYLE="vertical-align:baseline; position:relative; bottom:.8ex">&reg;</SUP></FONT> rigs in the remainder of 2013. In connection with the newer horizontal shale and other
unconventional resource plays, we have added equipment to perform service intensive fracturing jobs. As of March&nbsp;31, 2013, we had more than 750,000 hydraulic horsepower in our pressure pumping fleet. Low natural gas prices and the industry-wide
addition of new pressure pumping equipment to the marketplace has led to an excess supply of pressure pumping equipment in North America. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">17 </FONT></P>



<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">We maintain a backlog of commitments for contract drilling revenues under term contracts,
which we define as contracts with a fixed term of six months or more. Our backlog as of March&nbsp;31, 2013 was approximately $1.14 billion. We expect approximately $626 million of our backlog to be realized in the remainder of 2013. We calculate
our backlog by multiplying the day rate under our term drilling contracts by the number of days remaining under the contract. The calculation does not include any revenues related to other fees such as for mobilization, demobilization and customer
reimbursables, nor does it include potential reductions in rates for unscheduled standby or during periods in which the rig is moving, on standby or incurring maintenance and repair time in excess of what is permitted under the drilling contract. In
addition, generally our term drilling contracts are subject to termination by the customer on short notice and provide for an early termination payment to us in the event that the contract is terminated by the customer. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">For the three months ended March&nbsp;31, 2013 and 2012, our operating revenues consisted of the following (dollars in thousands):
</FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="92%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="74%"></TD>
<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="14" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Three Months Ended March&nbsp;31,</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Contract drilling</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">419,094</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">63</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">489,482</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">66</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Pressure pumping</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">231,160</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">35</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">241,722</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">32</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Oil and natural gas</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">16,785</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">14,717</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">667,039</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">100</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">745,921</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">100</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Generally, the profitability of our business is impacted most by two primary factors in our contract
drilling segment: our average number of rigs operating and our average revenue per operating day. During the first quarter of 2013, our average number of rigs operating was 188 in the United States and 11 in Canada compared to 224 in the United
States and 13 in Canada in the first quarter of 2012. Our average revenue per operating day was $23,410 in the first quarter of 2013 compared to $22,650 in the first quarter of 2012. Due primarily to reduced revenues in our contract drilling and
pressure pumping segments, as well as higher depreciation, depletion and amortization expense, consolidated net income for the first quarter of 2013 was $56.2 million compared to consolidated net income of $97.3 million for the first quarter of
2012. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Our revenues, profitability and cash flows are highly dependent upon prevailing prices for oil and natural gas. During
periods of improved commodity prices, the capital spending budgets of oil and natural gas operators tend to expand, which generally results in increased demand for our services. Conversely, in periods when these commodity prices deteriorate, the
demand for our services generally weakens and we experience downward pressure on pricing for our services. Oil and natural gas prices and our monthly average number of rigs operating have declined from historic highs. In March 2013, our average
number of rigs operating was 199. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">We are highly impacted by competition, the availability of excess equipment, labor issues,
weather and various other factors that could materially adversely affect our business, financial condition, cash flows and results of operations. Please see &#147;Risk Factors&#148; included in Part I of our Annual Report on Form&nbsp;10-K for the
fiscal year ended December&nbsp;31, 2012. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">We believe that our liquidity as of March&nbsp;31, 2013, which includes
approximately $351 million in working capital, approximately $460 million available under our $500&nbsp;million revolving credit facility, together with cash expected to be generated from operations, should provide us with sufficient ability to fund
our current plans to build new equipment, make improvements to our existing equipment, service our debt and pay cash dividends. If we pursue opportunities for growth that require capital, we believe we would be able to satisfy these needs through a
combination of working capital, cash flows from operating activities, borrowing capacity under our revolving credit facility or additional debt or equity financing. However, there can be no assurance that such capital will be available on reasonable
terms, if at all. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Commitments and Contingencies</I>&nbsp;&#151; As of March&nbsp;31, 2013, we maintained letters of credit
in the aggregate amount of $39.8 million for the benefit of various insurance companies as collateral for retrospective premiums and retained losses which could become payable under the terms of the underlying insurance contracts. These letters of
credit expire annually at various times during the year and are typically renewed. As of March&nbsp;31, 2013, no amounts had been drawn under the letters of credit. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">As of March&nbsp;31, 2013, we had commitments to purchase approximately $128 million of major equipment for our drilling and pressure pumping businesses. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">18 </FONT></P>



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 <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Our pressure pumping business has entered into agreements to purchase minimum quantities of
proppants and chemicals from certain vendors. These agreements expire in 2016 and 2017. As of March&nbsp;31, 2013, the remaining obligation under these agreements is approximately $35.0 million, of which materials with a total purchase price of
approximately $7.2 million are expected to be delivered during the last three quarters of 2013. In the event that the required minimum quantities are not purchased during any contract year, the Company would be required to make a liquidated damages
payment to the respective vendor for any shortfall. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">In November 2011, our pressure pumping business entered into an agreement
with a proppant vendor to advance, on a non-revolving basis, up to $12.0 million to such vendor to finance its construction of certain processing facilities. This advance is secured by the underlying processing facilities and other assets and bears
interest at an annual rate of 5.0%. Repayment of the advance is to be made through discounts applied to purchases from the vendor and repayment of all amounts advanced must be made no later than October&nbsp;1, 2017. As of March&nbsp;31, 2013,
advances of approximately $11.8 million had been made under this agreement and repayments of approximately $531,000 had been received resulting in a balance outstanding of approximately $11.2 million. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Trading and Investing</I>&nbsp;&#151; We have not engaged in trading activities that include high-risk securities, such as derivatives
and non-exchange traded contracts. We invest cash primarily in highly liquid, short-term investments such as overnight deposits and money market accounts. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2"><I>Description of Business</I>&nbsp;&#151; We conduct our contract drilling operations primarily in the continental United States, Alaska and western and northern Canada. We have more than 300 marketable
land-based drilling rigs. We provide pressure pumping services to oil and natural gas operators primarily in Texas and the Appalachian Basin. Pressure pumping services are primarily well stimulation and cementing for completion of new wells and
remedial work on existing wells. We also invest in oil and natural gas assets as a non-operating working interest owner. Our oil and natural gas working interests are located primarily in Texas and New Mexico. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The North American oil and natural gas services industry has experienced downturns in demand during the last decade. During these
periods, there have been substantially more drilling rigs and pressure pumping equipment available than necessary to meet demand. As a result, drilling and pressure pumping contractors have had difficulty sustaining profit margins and, at times,
have incurred losses during the downturn periods. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">In addition, unconventional resource plays have substantially increased and
some drilling rigs are not capable of drilling these wells efficiently. Accordingly, the utilization of some older technology drilling rigs may be hampered by their lack of capability to efficiently compete for this work. Other ongoing factors which
could continue to adversely affect utilization rates and pricing, even in an environment of high oil and natural gas prices and increased drilling activity, include: </FONT></P> <P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#149;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">movement of drilling rigs from region to region, </FONT></P></TD></TR></TABLE> <P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#149;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">reactivation of land-based drilling rigs,&nbsp;or </FONT></P></TD></TR></TABLE> <P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#149;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">construction of new technology drilling rigs. </FONT></P></TD></TR></TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">Construction of new technology drilling rigs increased in recent years. The addition of new technology drilling rigs to the market, combined with a reduction in the drilling of vertical wells, has
resulted in excess capacity of conventional drilling rigs. Similarly, the substantial increase in unconventional resource plays has led to higher demand for pressure pumping services, and there has been a significant increase in the construction of
new pressure pumping equipment across the industry. As a result of relatively low natural gas prices and the construction of new equipment, there is currently an excess of pressure pumping equipment available. In circumstances of excess capacity,
providers of pressure pumping services have difficulty sustaining profit margins and may sustain losses during downturn periods. We cannot predict either the future level of demand for our contract drilling or pressure pumping services or future
conditions in the oil and natural gas contract drilling or pressure pumping businesses. </FONT></P> <P STYLE="margin-top:18px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Critical Accounting Policies </B></FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">In addition to established accounting policies, our consolidated financial statements are impacted by certain estimates and assumptions
made by management. No changes in our critical accounting policies have occurred since the filing of our Annual Report on Form 10-K for the fiscal year ended December&nbsp;31, 2012. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">19 </FONT></P>



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 <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Liquidity and Capital Resources </B></FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">As of March&nbsp;31, 2013, we had working capital of $351 million, including cash and cash equivalents of $144 million, compared to
working capital of $340 million and cash and cash equivalents of $111 million at December&nbsp;31, 2012. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">During the three
months ended March&nbsp;31, 2013, our sources of cash flow included: </FONT></P> <P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#149;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">$210 million from operating activities, </FONT></P></TD></TR></TABLE> <P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#149;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">$21.4 million from the exercise of stock options and related tax benefits associated with stock-based compensation, and </FONT></P></TD></TR></TABLE>
<P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#149;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">$707,000 in proceeds from the disposal of property and equipment. </FONT></P></TD></TR></TABLE>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">During the three months ended March&nbsp;31, 2013, we used $15.2 million to repurchase shares of our common stock, $7.3 million to pay
dividends on our common stock, $1.3 million to repay long-term debt and $174 million: </FONT></P> <P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#149;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">to build new drilling rigs and pressure pumping equipment, </FONT></P></TD></TR></TABLE>
<P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#149;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">to make capital expenditures for the betterment and refurbishment of our drilling rigs and pressure pumping equipment, </FONT></P></TD></TR></TABLE>
<P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#149;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">to acquire and procure equipment and facilities to support our drilling and pressure pumping operations, and </FONT></P></TD></TR></TABLE>
<P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="5%"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD WIDTH="2%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#149;</FONT></TD>
<TD WIDTH="1%" VALIGN="top"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">to fund investments in oil and natural gas properties on a working interest basis. </FONT></P></TD></TR></TABLE>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">We paid cash dividends during the three months ended March&nbsp;31, 2013 as follows: </FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="76%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="76%"></TD>
<TD VALIGN="bottom" WIDTH="8%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="8%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Per&nbsp;Share</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Total</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1">(in&nbsp;thousands)</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Paid on March&nbsp;29, 2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.05</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,312</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">On April 24, 2013, our Board of Directors approved a cash dividend on our common stock in the amount of
$0.05 per share to be paid on June 28, 2013 to holders of record as of June 14, 2013. The amount and timing of all future dividend payments, if any, is subject to the discretion of the Board of Directors and will depend upon business conditions,
results of operations, financial condition, terms of our credit facilities and other factors. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">On July&nbsp;25, 2012, our
Board of Directors approved a stock buyback program authorizing purchases of up to $150 million of our common stock in open market or privately negotiated transactions. During the three months ended March&nbsp;31, 2013, no shares were purchased
under the stock buyback program. As of March&nbsp;31, 2013, we had remaining authorization to purchase approximately $51.1 million of our outstanding common stock under the stock buyback program. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">On September&nbsp;27, 2012, we entered into a Credit Agreement (the &#147;Credit Agreement&#148;). The Credit Agreement is a committed
senior unsecured credit facility that includes a revolving credit facility and a term loan facility. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The revolving credit
facility permits aggregate borrowings of up to $500 million outstanding at any time. The revolving credit facility contains a letter of credit facility that is limited to $150 million and a swing line facility that is limited to $40 million, in each
case outstanding at any time. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The term loan facility provides for a loan of $100 million, which was drawn on
December&nbsp;24, 2012. The term loan facility is payable in quarterly principal installments, which commenced December&nbsp;27, 2012. The installment amounts vary from 1.25% of the original principal amount for each of the first four quarterly
installments, 2.50% of the original principal amount for each of the subsequent eight quarterly installments, 5.00% of the original principal amount for the subsequent four quarterly installments and 13.75% of the original principal amount for the
final four quarterly installments. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">20 </FONT></P>



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 <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Subject to customary conditions, we may request that the lenders&#146; aggregate commitments
with respect to the revolving credit facility and/or the term loan facility be increased by up to $100 million, not to exceed total commitments of $700 million. The maturity date under the Credit Agreement is September&nbsp;27, 2017 for both the
revolving facility and the term facility. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Loans under the Credit Agreement bear interest by reference, at our election, to
the LIBOR rate or base rate, provided, that swing line loans bear interest by reference only to the base rate. The applicable margin on LIBOR rate loans varies from 2.25% to 3.25% and the applicable margin on base rate loans varies from 1.25% to
2.25%, in each case determined based upon our debt to capitalization ratio. As of March&nbsp;31, 2013, the applicable margin on LIBOR rate loans was 2.25% and the applicable margin on base rate loans was 1.25%. A letter of credit fee is payable by
us equal to the applicable margin for LIBOR rate loans times the daily amount available to be drawn under outstanding letters of credit. The commitment fee rate payable to the lenders for the unused portion of the credit facility is 0.50%.
</FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Each of our domestic subsidiaries other than immaterial subsidiaries has unconditionally guaranteed all of our existing and
future indebtedness and liabilities of the other guarantors arising under the Credit Agreement and other loan documents. Such guarantees also cover our obligations and those of any of our subsidiaries arising under any interest rate swap contract
with any person while such person is a lender under the Credit Agreement. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The Credit Agreement also requires compliance with
two financial covenants. We must not permit our debt to capitalization ratio to exceed 45%. The Credit Agreement generally defines the debt to capitalization ratio as the ratio of (a)&nbsp;total borrowed money indebtedness to (b)&nbsp;the sum of
such indebtedness plus consolidated net worth, with consolidated net worth determined as of the last day of the most recently ended fiscal quarter. We also must not permit the interest coverage ratio as of the last day of a fiscal quarter to be less
than 3.00 to 1.00. The Credit Agreement generally defines the interest coverage ratio as the ratio of EBITDA of the four prior fiscal quarters to interest charges for the same period. We were in compliance with these financial covenants as of
March&nbsp;31, 2013. The Credit Agreement also contains customary representations, warranties, indemnities and affirmative and negative covenants. We do not expect that the restrictions and covenants will impair, in any material respect, our ability
to operate or react to opportunities that might arise. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Events of default under the Credit Agreement include failure to pay
principal or interest when due, failure to comply with the financial and operational covenants, as well as a cross default event, loan document enforceability event, change of control event and bankruptcy and other insolvency events. If an event of
default occurs and is continuing, then a majority of the lenders have the right, among others, to (i)&nbsp;terminate the commitments under the Credit Agreement, (ii)&nbsp;accelerate and require us to repay all the outstanding amounts owed under any
loan document (provided that in limited circumstances with respect to insolvency and bankruptcy, such acceleration is automatic), and (iii)&nbsp;requires us to cash collateralize any outstanding letters of credit. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">As of March&nbsp;31, 2013, we had $97.5 million principal amount outstanding under the term loan facility at an interest rate of 2.625%
and no amounts outstanding under the revolving credit facility. We had $39.8 million in letters of credit outstanding at March&nbsp;31, 2013 and, as a result, we had available borrowing of approximately $460 million at that date. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">On October&nbsp;5, 2010, we completed the issuance and sale of $300 million in aggregate principal amount of our 4.97% Series A Senior
Notes due October&nbsp;5, 2020 (the &#147;Series A Notes&#148;) in a private placement. The Series A Notes bear interest at a rate of 4.97%&nbsp;per annum. We pay interest on the Series A Notes on April&nbsp;5 and October&nbsp;5 of each year. The
Series A Notes will mature on October&nbsp;5, 2020. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">On June&nbsp;14, 2012, we completed the issuance and sale of $300 million
in aggregate principal amount of our 4.27% Series B Senior Notes due June&nbsp;14, 2022 (the &#147;Series B Notes&#148;) in a private placement. The Series B Notes bear interest at a rate of 4.27%&nbsp;per annum. We pay interest on the Series B
Notes on April&nbsp;5 and October&nbsp;5 of each year. The Series B Notes will mature on June&nbsp;14, 2022. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The Series A
Notes and Series B Notes are senior unsecured obligations which rank equally in right of payment with all of our other unsubordinated indebtedness. The Series A Notes and Series B Notes are guaranteed on a senior unsecured basis by each of our
existing domestic subsidiaries other than immaterial subsidiaries. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The Series A Notes and Series B Notes are prepayable at
our option, in whole or in part, provided that in the case of a partial prepayment, prepayment must be in an amount not less than 5% of the aggregate principal amount of the notes then outstanding, at any time and from time to time at 100% of the
principal amount prepaid, plus accrued and unpaid interest to the prepayment date, plus a &#147;make-whole&#148; premium as specified in the note purchase agreements. We must offer to prepay the notes upon the occurrence of any change of control. In
addition, we must offer to prepay the notes upon the occurrence of certain asset dispositions if the proceeds therefrom are not timely reinvested in productive assets. If any offer to prepay is accepted, the purchase price of each prepaid note is
100% of the principal amount thereof, plus accrued and unpaid interest thereon to the prepayment date. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">21 </FONT></P>



<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The respective note purchase agreements require compliance with two financial covenants. We
must not permit our debt to capitalization ratio to exceed 50% at any time. The note purchase agreements generally define the debt to capitalization ratio as the ratio of (a)&nbsp;total borrowed money indebtedness to (b)&nbsp;the sum of such
indebtedness plus consolidated net worth, with consolidated net worth determined as of the last day of the most recently ended fiscal quarter. We also must not permit the interest coverage ratio as of the last day of a fiscal quarter to be less than
2.50 to 1.00. The note purchase agreements generally define the interest coverage ratio as the ratio of EBITDA for the four prior fiscal quarters to interest charges for the same period. We were in compliance with these financial covenants as of
March&nbsp;31, 2013. We do not expect that the restrictions and covenants will impair, in any material respect, our ability to operate or react to opportunities that might arise. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Events of default under the note purchase agreements include failure to pay principal or interest when due, failure to comply with the
financial and operational covenants, a cross default event, a judgment in excess of a threshold event, the guaranty agreement ceasing to be enforceable, the occurrence of certain ERISA events, a change of control event and bankruptcy and other
insolvency events. If an event of default under a note purchase agreement occurs and is continuing, then holders of a majority in principal amount of the respective notes have the right to declare all the notes then-outstanding to be immediately due
and payable. In addition, if we default in payments on any note, then until such defaults are cured, the holder thereof may declare all the notes held by it pursuant to the note purchase agreement to be immediately due and payable. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">We believe that our liquidity as of March&nbsp;31, 2013, which included approximately $351 million in working capital, and approximately
$460 million available under our $500 million revolving credit facility, together with cash expected to be generated from operations, should provide us with sufficient ability to fund our current plans to build new equipment, make improvements to
our existing equipment, service our debt and pay cash dividends. If we pursue opportunities for growth that require capital, we believe we would be able to satisfy these needs through a combination of working capital, cash flows from operating
activities, borrowing capacity under our revolving credit facility or additional debt or equity financing. However, there can be no assurance that such capital will be available on reasonable terms, if at all. </FONT></P>
<P STYLE="margin-top:18px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Results of Operations </B></FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>The following tables summarize operations by business segment for the three months ended March&nbsp;31, 2013 and 2012: </I></FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="84%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="71%"></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom" NOWRAP> <P STYLE="border-bottom:1px solid #000000;width:59pt"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Contract Drilling</B></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>%&nbsp;Change</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(Dollars in thousands)</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Revenues</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">419,094</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">489,482</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(14.4</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Direct operating costs</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">247,072</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">282,649</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(12.6</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Selling, general and administrative</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,851</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,336</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">38.5</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Depreciation and impairment</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">97,622</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">93,726</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4.2</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Operating income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">72,549</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">111,771</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(35.1</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Operating days</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">17,903</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">21,610</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(17.2</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Average revenue per operating day</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">23.41</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">22.65</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3.4</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Average direct operating costs per operating day</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">13.80</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">13.08</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">5.5</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Average rigs operating</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">199</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">237</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(16.0</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Capital expenditures</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">134,383</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">200,607</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(33.0</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%;padding-bottom:0px; "><FONT STYLE="font-family:Times New Roman" SIZE="2">Revenues and direct operating costs decreased in 2013 compared to 2012 as a result
of fewer operating days. A greater number of APEX<FONT STYLE="font-family:Times New Roman" SIZE="1"><SUP STYLE="vertical-align:baseline; position:relative; bottom:.8ex">&reg;</SUP></FONT> rigs working combined with fewer total rigs working caused an
increase in the average revenue per operating day. We received a $2.9 million early termination payment for one rig that also caused an increase in the average revenue per operating day in 2013. Average direct operating costs per operating day
increased in 2013 due primarily to higher labor and related costs. Capital expenditures were incurred in 2013 and 2012 to build new drilling rigs, to modify and upgrade our drilling rigs and to acquire additional related equipment such as top
drives, drill pipe, drill collars, engines, fluid circulating systems, rig hoisting systems and safety enhancement equipment. Depreciation expense increased primarily as a result of capital expenditures. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">22 </FONT></P>



<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>


<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="84%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="71%"></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom" NOWRAP> <P STYLE="border-bottom:1px solid #000000;width:62pt"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Pressure Pumping</B></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>%&nbsp;Change</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(Dollars in thousands)</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Revenues</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">231,160</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">241,722</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(4.4</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Direct operating costs</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">168,156</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">166,857</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.8</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Selling, general and administrative</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4,253</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4,275</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(0.5</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Depreciation and amortization</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">30,236</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">23,803</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">27.0</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Operating income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">28,515</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">46,787</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(39.1</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Fracturing jobs</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">266</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">330</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(19.4</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Other jobs</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,142</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,659</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(31.2</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total jobs</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,408</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,989</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(29.2</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Average revenue per fracturing job</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">784.60</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">625.98</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">25.3</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Average revenue per other job</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">19.66</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">21.19</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(7.2</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Average revenue per total job</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">164.18</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">121.53</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">35.1</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Average direct operating costs per total job</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">119.43</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">83.89</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">42.4</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Capital expenditures</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">30,234</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">54,574</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(44.6</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Our customers have increased their activities in the development of unconventional reservoirs resulting
in an increase in larger multi-stage fracturing jobs associated therewith. We have added additional equipment through construction and acquisition to meet this demand and expand our area of operations. As a result, although total fracturing jobs
have decreased, we have continued to experience an increase in the number of these larger multi-stage fracturing jobs as a proportion of the total fracturing jobs we performed. Average revenue per fracturing job increased primarily as a result of
this increase in the number of larger multi-stage fracturing jobs in 2013 as compared to 2012. Average revenue per other job decreased as a result of a change in job mix. Average direct operating costs per total job increased primarily as a result
of increased costs of materials, higher labor and related costs and higher repairs and maintenance costs. Depreciation and amortization expense increased in 2013 due to significant capital expenditures incurred in recent years to add capacity.
</FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="84%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="73%"></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom" NOWRAP> <P STYLE="border-bottom:1px solid #000000;width:167pt"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Oil and Natural Gas Production and Exploration</B></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>%&nbsp;Change</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(Dollars in thousands)</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Revenues&#151;Oil</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">15,395</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">13,813</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">11.5</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Revenues &#150; Natural gas and liquids</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,390</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">904</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">53.8</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Revenues&#151;Total</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">16,785</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">14,717</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">14.1</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Direct operating costs</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,922</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,730</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7.0</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Depletion and impairment</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,622</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4,469</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">70.6</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Operating income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">6,241</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,518</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(17.0</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Capital expenditures</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">8,664</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">7,429</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">16.6</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total revenues increased primarily as a result of increased production of oil and higher average oil
prices. Oil production increased due to the addition of new wells. Depletion and impairment expense in 2013 includes approximately $1.9 million of oil and natural gas property impairments compared to approximately $292,000 of oil and natural gas
property impairments in 2012. Depletion expense increased approximately $1.5 million in 2013 compared to 2012 primarily due to increased oil production. </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="84%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="73%"></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom" NOWRAP> <P STYLE="border-bottom:1px solid #000000;width:72pt"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Corporate and Other</B></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2013</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>2012</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>%&nbsp;Change</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="6" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(Dollars&nbsp;in&nbsp;thousands)</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD COLSPAN="2" VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Selling, general and administrative</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">11,293</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">8,257</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">36.8</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Depreciation</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">955</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">955</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">0.0</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Net gain (loss) on asset disposals</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(125</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">2,400</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">NA</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Provision for bad debts</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2"> &#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">1,600</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(100.0</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Interest income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">173</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">54</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">220.4</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Interest expense</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">6,766</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">4,582</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">47.7</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Other income</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">19</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">55</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">(65.5</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">)%&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Capital expenditures</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">880</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">793</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">11.0</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">%&nbsp;</FONT></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Selling, general and administrative expense in the first quarter of 2012 included a reduction in
personnel costs related to the final determination of payouts under the 2009 Performance Unit Awards upon the completion of the performance period. There was no similar reduction in the first quarter of 2013. Gains and losses on the disposal of
assets are treated as part of our corporate activities because such transactions relate to corporate strategy decisions of our executive management group. A provision for bad debts was recorded in the first quarter of 2012; we determined that no
provision was needed in the first quarter of 2013. Interest expense increased in 2013 due primarily to interest charges related to the $300 million of Series B Senior Notes issued and sold on June&nbsp;14, 2012. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">23 </FONT></P>



<p Style='page-break-before:always'>
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<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Income Taxes</B> </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">On January&nbsp;1, 2010, we converted our Canadian operations from a Canadian branch to a controlled foreign corporation for federal income tax purposes. Because the statutory tax rates in Canada are
lower than those in the United States, this transaction triggered a $5.1 million reduction in deferred tax liabilities, which is being amortized as a reduction to deferred income tax expense over the weighted average remaining useful life of the
Canadian assets. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">As a result of the above conversion, our Canadian assets are no longer directly subject to United States
taxation, provided that the related unremitted earnings are permanently reinvested in Canada. Effective January&nbsp;1, 2010, we have elected to permanently reinvest these unremitted earnings in Canada, and we intend to do so for the foreseeable
future. As a result, no deferred United States federal or state income taxes have been provided on such unremitted foreign earnings, which totaled approximately $33.7 million as of March&nbsp;31, 2013. The unrecognized deferred tax liability
associated with these earnings was approximately $5.1 million, net of available foreign tax credits. This liability would be recognized if we received a dividend of these unremitted earnings. </FONT></P> <P STYLE="margin-top:18px;margin-bottom:0px"><FONT
STYLE="font-family:Times New Roman" SIZE="2"><B>Recently Issued Accounting Standards </B></FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">In February 2013, the FASB issued an
accounting standards update that requires additional disclosures regarding reclassifications out of accumulated other comprehensive income. This requirement is effective for fiscal years, and interim periods within those years, beginning after
December&nbsp;15, 2012, and became effective for us in the quarter ended March&nbsp;31, 2013. The adoption of this update did not have a material impact on the disclosures included in our consolidated financial statements. We include in accumulated
other comprehensive income the cumulative translation adjustment of our foreign subsidiary. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">In February 2013, the FASB issued
an accounting standards update to provide guidance for the recognition, measurement, and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of the update is
fixed at the reporting date, except for obligations addressed within existing guidance in U.S. GAAP. The guidance requires an entity to measure those obligations as the sum of the amount the reporting entity agreed to pay on the basis of its
arrangement among its co-obligors and any additional amount the reporting entity expects to pay on behalf of its co-obligors. The update also requires an entity to disclose the nature and amount of the obligation as well as other information about
those obligations. The requirements in this update are effective during interim and annual periods beginning after December&nbsp;15, 2013. The adoption of this update is not expected to have a material impact on our consolidated financial
statements. </FONT></P> <P STYLE="margin-top:18px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Volatility of Oil and Natural Gas Prices and its Impact on Operations and Financial Condition </B></FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Our revenue, profitability and cash flows are highly dependent upon prevailing prices for oil and natural gas and expectations about
future prices. For many years, oil and natural gas prices and markets have been extremely volatile. Prices are affected by factors such as market supply and demand, international military, political and economic conditions, the ability of OPEC to
set and maintain production and price targets, technical advances affecting energy consumption and the price and availability of alternative fuels. All of these factors are beyond our control. After experiencing low levels of activity in late 2008
through 2009, drilling activities increased in 2010 as did the prices for oil and natural gas. The increased drilling activity was largely attributed to increased development of unconventional oil and natural gas reservoirs and an improvement in the
price of oil. Drilling for oil and liquids rich targets continued to increase in 2011 as oil averaged $94.86 per barrel for the year (WTI spot price as reported by the United States Energy Information Administration). Natural gas prices decreased in
2011 to an average of $4.00 per Mcf (Henry Hub spot price as reported by the United States Energy Information Administration). This decrease continued into 2012 where natural gas prices fell below $2.00 per Mcf in April and averaged $2.75 per Mcf
for the year resulting in continued low levels of drilling activity for natural gas in 2012. The increase in drilling activity in oil rich basins absorbed some of the decrease in demand for natural gas drilling activities in 2012. During the first
quarter of 2013, natural gas prices averaged $3.49 per Mcf and oil prices averaged $94.34 per barrel. Our average number of rigs operating remains well below the number of our available rigs. Construction of new land drilling rigs in the United
States during the last decade has significantly contributed to excess capacity in total available drilling rigs. As a result of decreased drilling activity and excess capacity, our average number of rigs operating has declined from historic highs.
We expect oil and natural gas prices to continue to be volatile and to affect our financial condition, operations and ability to access sources of capital. Low market prices for oil and natural gas would likely result in lower
</FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">24 </FONT></P>



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 <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">
demand for our drilling rigs and pressure pumping services and could adversely affect our operating results, financial condition and cash flows. Even during periods of high prices for oil and
natural gas, companies exploring for oil and natural gas may cancel or curtail programs, or reduce their levels of capital expenditures for exploration and production for a variety of reasons, which could reduce demand for our drilling and pressure
pumping services. </FONT></P> <P STYLE="margin-top:18px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A NAME="tx503564_10"></A><B>ITEM&nbsp;3.&nbsp;</B><B><I>Quantitative and Qualitative Disclosures About Market Risk</I></B>
</FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">We currently have exposure to interest rate market risk associated with any borrowings that we have under our revolving credit
facility and term loan facility. Interest is paid on the outstanding principal amount of borrowings at a floating rate based on, at our election, LIBOR or a base rate. The margin on LIBOR loans ranges from 2.25% to 3.25% and the margin on base rate
loans ranges from 1.25% to 2.25%, based on our debt to capitalization ratio. At March&nbsp;31, 2013, the margin on LIBOR loans was 2.25% and the margin on base rate loans was 1.25%. As of March&nbsp;31, 2013, we had no balances outstanding under our
revolving credit facility and $97.5 million outstanding under our term loan facility at an interest rate of 2.625%. The interest rate on the borrowings outstanding under our credit facilities is variable and adjusts at each interest payment date
based on our election of LIBOR or the base rate. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">We conduct a portion of our business in Canadian dollars through our
Canadian land-based drilling operations. The exchange rate between Canadian dollars and U.S.&nbsp;dollars has fluctuated during the last several years. If the value of the Canadian dollar against the U.S.&nbsp;dollar weakens, revenues and earnings
of our Canadian operations will be reduced and the value of our Canadian net assets will decline when they are translated to U.S.&nbsp;dollars. This currency risk is not material to our results of operations or financial condition. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The carrying values of cash and cash equivalents, trade receivables and accounts payable approximate fair value due to the short-term
maturity of these items. </FONT></P> <P STYLE="margin-top:18px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A NAME="tx503564_11"></A><B>ITEM&nbsp;4.&nbsp;</B><B><I>Controls and Procedures</I></B> </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Disclosure Controls and Procedures</I>&nbsp;&#151; We maintain disclosure controls and procedures (as such terms are defined in
Rules&nbsp;13a-15(e) and 15d-15(e) promulgated under the Exchange Act), designed to ensure that the information required to be disclosed in the reports that we file with the SEC under the Exchange Act is recorded, processed, summarized and reported
within the time periods specified in the SEC&#146;s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer (&#147;CEO&#148;) and Chief Financial Officer (&#147;CFO&#148;),
as appropriate, to allow timely decisions regarding required disclosure. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Under the supervision and with the participation of
our management, including our CEO and CFO, we conducted an evaluation of the effectiveness of our disclosure controls and procedures as of the end of the period covered by this Quarterly Report on Form&nbsp;10-Q. Based on that evaluation, our CEO
and CFO concluded that our disclosure controls and procedures were effective as of March&nbsp;31, 2013. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Changes in
Internal Control Over Financial Reporting</I>&nbsp;&#151;There were no changes in our internal control over financial reporting during our most recently completed fiscal quarter that have materially affected, or are reasonably likely to materially
affect, our internal control over financial reporting, as defined in Rule 13a-15(f) under the Exchange Act. </FONT></P> <P STYLE="margin-top:24px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B><A NAME="tx503564_12">
</A>PART&nbsp;II&nbsp;&#151; OTHER INFORMATION </B></FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A NAME="tx503564_13"></A><B>ITEM&nbsp;2.</B><B><I>&nbsp;Unregistered Sales of Equity
Securities and Use of Proceeds</I></B> </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The table below sets forth the information with respect to purchases of our common
stock made by us during the quarter ended March&nbsp;31, 2013. </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="92%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD WIDTH="42%"></TD>
<TD VALIGN="bottom" WIDTH="10%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="10%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="10%"></TD>
<TD></TD>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="10%"></TD>
<TD></TD>
<TD></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom" NOWRAP> <P STYLE="border-bottom:1px solid #000000;width:53pt"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Period Covered</B></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Total</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Number&nbsp;of&nbsp;
Shares</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Purchased</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Average&nbsp;Price</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Paid
per</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Share</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Total&nbsp;Number&nbsp;of</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Shares (or
Units)</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Purchased&nbsp;as&nbsp;Part</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>of
Publicly</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Announced Plans</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>or Programs</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Approximate&nbsp;Dollar</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Value of
Shares</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>That May Yet Be</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Purchased&nbsp;Under&nbsp;the</B></FONT><br><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>Plans or</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>Programs (in</B></FONT><br><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>thousands)(1)</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD></TR>


<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">January&nbsp;1-31, 2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2"> &#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">51,108</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">February&nbsp;1-28, 2013</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2"> &#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">51,108</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">March&nbsp;1-31, 2013 (2)</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">637,624</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">23.84</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">51,108</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:1px solid #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Total</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">637,624</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">23.84</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">&#151;&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">$</FONT></TD>
<TD VALIGN="bottom" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">51,108</FONT></TD>
<TD NOWRAP VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD></TR>
<TR STYLE="font-size:1px">
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD VALIGN="bottom"> <P STYLE="border-top:3px double #000000">&nbsp;</P></TD>
<TD>&nbsp;</TD>
<TD VALIGN="bottom">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom"></TD></TR>
</TABLE>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">25 </FONT></P>



<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="line-height:8px;margin-top:0px;margin-bottom:2px;border-bottom:0.5pt solid #000000;width:10%">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD></TD>
<TD VALIGN="bottom" WIDTH="3%"></TD>
<TD WIDTH="95%"></TD></TR>


<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">(1)</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">On July&nbsp;26, 2012, we announced that our Board of Directors approved a stock buyback program authorizing purchases of up to $150 million of our common stock in open market or
privately negotiated transactions.</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2)</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">We purchased 637,624 shares of treasury stock from employees during March 2013. These shares were purchased at fair market value upon the exercise of stock options to provide the
employees with the funds necessary to pay the exercise price of the stock option and to satisfy payroll tax withholding obligations. The total purchase price for these shares was approximately $15.2 million. These purchases were made pursuant to the
terms of the Patterson-UTI Energy, Inc. 2005 Long-Term Incentive Plan and not pursuant to the stock buyback program.</FONT></TD></TR>
</TABLE> <P STYLE="margin-top:18px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2"><A NAME="tx503564_14"></A><B>ITEM&nbsp;6.</B><B><I>&nbsp;Exhibits</I></B> </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The following exhibits are filed herewith or incorporated by reference, as indicated: </FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE" ALIGN="center">


<TR>
<TD></TD>
<TD></TD>
<TD VALIGN="bottom"></TD>
<TD VALIGN="bottom" WIDTH="6%"></TD>
<TD WIDTH="90%"></TD></TR>


<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3.1&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Restated Certificate of Incorporation, as amended (filed August&nbsp;9, 2004 as Exhibit&nbsp;3.1 to the Company&#146;s Quarterly Report on Form&nbsp;10-Q for the quarterly period
ended June&nbsp;30, 2004 and incorporated herein by reference).</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3.2&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Amendment to Restated Certificate of Incorporation, as amended (filed August&nbsp;9, 2004 as Exhibit&nbsp;3.2 to the Company&#146;s Quarterly Report on Form&nbsp;10-Q for the
quarterly period ended June&nbsp;30, 2004 and incorporated herein by reference).</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">3.3&nbsp;&nbsp;</FONT></TD>
<TD NOWRAP VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Second Amended and Restated Bylaws (filed August 6, 2007 as Exhibit 3.3 to the Company&#146;s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2007 and
incorporated herein by reference).</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">31.1*</FONT></TD>
<TD NOWRAP VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Certification of Chief Executive Officer pursuant to Rule&nbsp;13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934, as amended.</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">31.2*</FONT></TD>
<TD NOWRAP VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Certification of Chief Financial Officer pursuant to Rule&nbsp;13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934, as amended.</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">32.1*</FONT></TD>
<TD NOWRAP VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18&nbsp;USC Section&nbsp;1350, as adopted pursuant to Section&nbsp;906 of the Sarbanes-Oxley Act of
2002.</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">101 *</FONT></TD>
<TD NOWRAP VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">The following materials from Patterson-UTI Energy, Inc.&#146;s Quarterly Report on Form 10-Q for the quarter ended March 31, 2013, formatted in XBRL (Extensible Business Reporting
Language): (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Operations, (iii) the Consolidated Statements of Comprehensive Income, (iv) the Consolidated Statement of Changes in Stockholders&#146; Equity, (v) the Consolidated
Statements of Cash Flows, and (vi) Notes to Consolidated Financial Statements.</FONT></TD></TR>
</TABLE> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2">*</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">filed herewith </FONT></TD></TR></TABLE>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">26 </FONT></P>



<p Style='page-break-before:always'>
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<h5 align="left"><a href="#toc">Table of Contents</a></h5>

 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B><A NAME="tx503564_15"></A>SIGNATURE </B></FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its
behalf by the undersigned thereunto duly authorized. </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P><DIV ALIGN="right">
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<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2">PATTERSON-UTI ENERGY, INC.</FONT></TD></TR>
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<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ John E. Vollmer III</FONT></P></TD></TR>
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<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-left:1.00em; text-indent:-1.00em" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">John E. Vollmer III</FONT></P></TD></TR>
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<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Senior Vice President &#150; Corporate Development,</FONT></P></TD></TR>
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<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Chief Financial Officer and Treasurer</FONT></P></TD></TR>
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<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>(Principal Financial and Accounting Officer and</I></FONT></P></TD></TR>
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<TD VALIGN="top"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Duly Authorized Officer)</I></FONT></P></TD></TR>
</TABLE></DIV> <P STYLE="margin-top:18px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">Date: May 1, 2013 </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">27 </FONT></P>


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<DOCUMENT>
<TYPE>EX-31.1
<SEQUENCE>2
<FILENAME>d503564dex311.htm
<DESCRIPTION>EX-31.1
<TEXT>
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<TITLE>EX-31.1</TITLE>
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 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>EXHIBIT&nbsp;31.1 </B></FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>CERTIFICATIONS </B></FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">I,
William Andrew Hendricks, Jr., certify that: </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(1)&nbsp;I have reviewed this quarterly report on Form&nbsp;10-Q of
Patterson-UTI Energy, Inc.; </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2)&nbsp;Based on my knowledge, this report does not contain any untrue statement of a material
fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(3)&nbsp;Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all
material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">(4)&nbsp;The registrant&#146;s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules&nbsp;13a-15(e) and
15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules&nbsp;13a-15(f) and 15d-15(f)) for the registrant and have: </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:4%; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">(a)&nbsp;designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the
registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:4%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(b)&nbsp;designed such internal control over financial reporting, or caused such internal control over financial reporting
to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
</FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:4%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(c)&nbsp;evaluated the effectiveness of the registrant&#146;s disclosure controls and procedures and presented
in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation;&nbsp;and </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:4%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(d)&nbsp;disclosed in this report any change in the registrant&#146;s internal control over financial reporting that
occurred during the registrant&#146;s most recent fiscal quarter (the registrant&#146;s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant&#146;s internal
control over financial reporting;&nbsp;and </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(5)&nbsp;The registrant&#146;s other certifying officer(s) and I have disclosed,
based on our most recent evaluation of internal control over financial reporting, to the registrant&#146;s auditors and the audit committee of the registrant&#146;s board of directors (or persons performing the equivalent functions): </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:4%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(a)&nbsp;all significant deficiencies and material weaknesses in the design or operation of internal control over
financial reporting which are reasonably likely to adversely affect the registrant&#146;s ability to record, process, summarize and report financial information;&nbsp;and </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:4%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(b)&nbsp;any fraud, whether or not material, that involves management or other employees who have a significant role in
the registrant&#146;s internal control over financial reporting. </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P><DIV ALIGN="right">
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<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ William Andrew Hendricks, Jr.</FONT></P></TD></TR>
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<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">William Andrew Hendricks, Jr.</FONT></TD></TR>
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<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>President and Chief Executive Officer</I></FONT></TD></TR>
</TABLE></DIV> <P STYLE="margin-top:18px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">Date: May 1, 2013 </FONT></P>
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<DOCUMENT>
<TYPE>EX-31.2
<SEQUENCE>3
<FILENAME>d503564dex312.htm
<DESCRIPTION>EX-31.2
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<TITLE>EX-31.2</TITLE>
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 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>EXHIBIT&nbsp;31.2 </B></FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>CERTIFICATIONS </B></FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">I, John
E. Vollmer&nbsp;III, certify that: </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(1)&nbsp;I have reviewed this quarterly report on Form&nbsp;10-Q of Patterson-UTI Energy,
Inc.; </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2)&nbsp;Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a
material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(3)&nbsp;Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all
material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">(4)&nbsp;The registrant&#146;s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules&nbsp;13a-15(e) and
15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules&nbsp;13a-15(f) and 15d-15(f)) for the registrant and have: </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:4%; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">(a)&nbsp;designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the
registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared; </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:4%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(b)&nbsp;designed such internal control over financial reporting, or caused such internal control over financial reporting
to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
</FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:4%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(c)&nbsp;evaluated the effectiveness of the registrant&#146;s disclosure controls and procedures and presented
in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation;&nbsp;and </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:4%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(d)&nbsp;disclosed in this report any change in the registrant&#146;s internal control over financial reporting that
occurred during the registrant&#146;s most recent fiscal quarter (the registrant&#146;s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant&#146;s internal
control over financial reporting;&nbsp;and </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(5)&nbsp;The registrant&#146;s other certifying officer(s) and I have disclosed,
based on our most recent evaluation of internal control over financial reporting, to the registrant&#146;s auditors and the audit committee of the registrant&#146;s board of directors (or persons performing the equivalent functions): </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:4%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(a)&nbsp;all significant deficiencies and material weaknesses in the design or operation of internal control over
financial reporting which are reasonably likely to adversely affect the registrant&#146;s ability to record, process, summarize and report financial information;&nbsp;and </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:4%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(b)&nbsp;any fraud, whether or not material, that involves management or other employees who have a significant role in
the registrant&#146;s internal control over financial reporting. </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P><DIV ALIGN="right">
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<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ John E. Vollmer III</FONT></P></TD></TR>
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<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">John E. Vollmer&nbsp;III</FONT></TD></TR>
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<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-left:1.00em; text-indent:-1.00em" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Senior Vice President&nbsp;&#151; Corporate</I></FONT></P></TD></TR>
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<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:1.00em; text-indent:-1.00em" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>Development, Chief Financial Officer</I></FONT></P>
<P STYLE="margin-top:0px;margin-bottom:1px; margin-left:1.00em; text-indent:-1.00em" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><I>and Treasurer</I></FONT></P></TD></TR>
</TABLE></DIV> <P STYLE="margin-top:18px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">Date: May 1, 2013 </FONT></P>
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<DOCUMENT>
<TYPE>EX-32.1
<SEQUENCE>4
<FILENAME>d503564dex321.htm
<DESCRIPTION>EX-32.1
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<TITLE>EX-32.1</TITLE>
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 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>EXHIBIT&nbsp;32.1 </B></FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>CERTIFICATION PURSUANT TO </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="2"><B>18&nbsp;U.S.C. SECTION&nbsp;1350, </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>AS ADOPTED PURSUANT TO </B></FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>SECTION&nbsp;906 OF THE SARBANES-OXLEY ACT OF 2002 </B></FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="2"><B>NOT FILED PURSUANT TO THE SECURITIES EXCHANGE ACT OF 1934 </B></FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">In connection
with the quarterly report of Patterson-UTI Energy, Inc. (the &#147;Company&#148;) on Form&nbsp;10-Q for the period ending March 31, 2013, as filed with the Securities and Exchange Commission on the date hereof (the &#147;Report&#148;), William
Andrew Hendricks, Jr., Chief Executive Officer, and John E. Vollmer&nbsp;III, Chief Financial Officer, of the Company, each certify, pursuant to 18&nbsp;U.S.C. Section&nbsp;1350, as adopted pursuant to Section&nbsp;906 of the Sarbanes-Oxley Act of
2002, that, to his knowledge: </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:4%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(1)&nbsp;The Report fully complies with the requirements of section&nbsp;13(a)
or 15(d) of the Securities Exchange Act of 1934;&nbsp;and </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:4%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(2)&nbsp;The information contained in the Report
fairly presents, in all material respects, the financial condition and results of operations of the Company. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">A signed
original of this written statement required by Section&nbsp;906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission upon request. The foregoing is being furnished solely
pursuant to said Section&nbsp;906 and Rule 13a-14(b) promulgated under the Securities Exchange Act of 1934, as amended, and is not being filed as part of the Report or as a separate disclosure document. </FONT></P>
<P STYLE="font-size:24px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
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<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ William Andrew Hendricks, Jr.</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD></TR>
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<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">William Andrew Hendricks, Jr.</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD></TR>
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<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Chief Executive Officer</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD></TR>
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<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">May 1, 2013</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD></TR>
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<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
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<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
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<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ John E. Vollmer III</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
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<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">John E. Vollmer&nbsp;III</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD></TR>
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<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Chief Financial Officer</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD></TR>
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<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">May 1, 2013</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
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<DOCUMENT>
<TYPE>EX-101.INS
<SEQUENCE>5
<FILENAME>pten-20130331.xml
<DESCRIPTION>XBRL INSTANCE DOCUMENT
<TEXT>
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<!-- Creation date: 2013-04-30T10:36:06Z -->
<!-- Copyright (c) 2005-2013 R.R. Donnelley & Sons Company All Rights Reserved. -->
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  <pten:MinimumPercentageOfFairValueTransactionsCorroboratedUsingObservableMarketInputsRequiredForLevelTwo contextRef="eol_PE7031----1310-Q0002_STD_366_20121231_0_503845x516913" decimals="4" id="id_1446237_890E56BA-65E9-4031-9EBA-32C07A3F8EFC_1002_0" unitRef="pure">0.0336</pten:MinimumPercentageOfFairValueTransactionsCorroboratedUsingObservableMarketInputsRequiredForLevelTwo>
  <pten:MinimumPercentageOfFairValueTransactionsCorroboratedUsingObservableMarketInputsRequiredForLevelTwo contextRef="eol_PE7031----1310-Q0002_STD_366_20121231_0_503845x601707" decimals="4" id="id_1446237_890E56BA-65E9-4031-9EBA-32C07A3F8EFC_2002_1" unitRef="pure">0.0370</pten:MinimumPercentageOfFairValueTransactionsCorroboratedUsingObservableMarketInputsRequiredForLevelTwo>
  <us-gaap:LineOfCreditFacilityCovenantTerms contextRef="eol_PE7031----1310-Q0002_STD_39_20120927_0_500478x535021" id="id_1446237_8C81274A-4269-47A1-916F-D60ED98D055A_1001_0">The Company must not permit its debt to capitalization ratio to exceed 45%. The Credit Agreement generally defines the debt to capitalization ratio as the ratio of (a)&#xA0;total borrowed money indebtedness to (b)&#xA0;the sum of such indebtedness plus consolidated net worth, with consolidated net worth determined as of the last day of the most recently ended fiscal quarter. The Company also must not permit the interest coverage ratio as of the last day of a fiscal quarter to be less than 3.00 to 1.00. The Credit Agreement generally defines the interest coverage ratio as the ratio of earnings before interest, taxes, depreciation and amortization (&#x201C;EBITDA&#x201D;) of the four prior fiscal quarters to interest charges for the same period. The Company was in compliance with these covenants at March&#xA0;31, 2013.</us-gaap:LineOfCreditFacilityCovenantTerms>
  <us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage contextRef="eol_PE7031----1310-Q0002_STD_39_20120927_0_500478x535021" decimals="4" id="id_1446237_6A283651-80BF-4FD3-835F-67B63F263B8D_1001_6" unitRef="pure">0.0050</us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage>
  <us-gaap:LineOfCreditFacilityFrequencyOfPayments contextRef="eol_PE7031----1310-Q0002_STD_39_20120927_0_500478x535021" id="id_1446237_75DF8664-713F-4411-9A2F-C81056DDD4A7_1001_2">Quarterly</us-gaap:LineOfCreditFacilityFrequencyOfPayments>
  <us-gaap:DebtInstrumentDateOfFirstRequiredPayment1 contextRef="eol_PE7031----1310-Q0002_STD_39_20120927_0_500478x535021" id="id_1446237_75DF8664-713F-4411-9A2F-C81056DDD4A7_1001_3">2012-12-27</us-gaap:DebtInstrumentDateOfFirstRequiredPayment1>
  <pten:ConsolidatedDebtAsPercentageOfTotalCapitalization contextRef="eol_PE7031----1310-Q0002_STD_39_20120927_0_500478x535021_504957x514053" decimals="2" id="id_1446237_8C81274A-4269-47A1-916F-D60ED98D055A_2001_2" unitRef="pure">0.45</pten:ConsolidatedDebtAsPercentageOfTotalCapitalization>
  <us-gaap:DebtInstrumentMaturityDate contextRef="eol_PE7031----1310-Q0002_STD_39_20120927_0_500478x535021_507199x498232" id="id_1446237_B7474073-7C89-4FFB-BBC3-F8A9F3A9E707_1001_2">2017-09-27</us-gaap:DebtInstrumentMaturityDate>
  <us-gaap:LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms contextRef="eol_PE7031----1310-Q0002_STD_39_20120927_0_500478x535021_507199x531011" id="id_1446237_75DF8664-713F-4411-9A2F-C81056DDD4A7_2001_1">The term loan facility is payable in quarterly principal  installments commencing December 27, 2012. The installment amounts vary from  1.25% of the original principal amount for each of the first four quarterly  installments, 2.50% of the original principal amount for each of the subsequent  eight quarterly installments, 5.00% of the original principal amount for the  subsequent four quarterly installments and 13.75% of the original principal  amount for the final four quarterly installments.</us-gaap:LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms>
  <pten:PrincipalPaymentsPercentage contextRef="eol_PE7031----1310-Q0002_STD_39_20120927_0_500478x535021_530657x537106" decimals="4" id="id_1446237_75DF8664-713F-4411-9A2F-C81056DDD4A7_3001_4" unitRef="pure">0.0125</pten:PrincipalPaymentsPercentage>
  <pten:PrincipalPaymentsPercentage contextRef="eol_PE7031----1310-Q0002_STD_39_20120927_0_500478x535021_530657x537107" decimals="4" id="id_1446237_75DF8664-713F-4411-9A2F-C81056DDD4A7_4001_5" unitRef="pure">0.0250</pten:PrincipalPaymentsPercentage>
  <pten:PrincipalPaymentsPercentage contextRef="eol_PE7031----1310-Q0002_STD_39_20120927_0_500478x535021_530657x537108" decimals="4" id="id_1446237_75DF8664-713F-4411-9A2F-C81056DDD4A7_5001_6" unitRef="pure">0.0500</pten:PrincipalPaymentsPercentage>
  <pten:PrincipalPaymentsPercentage contextRef="eol_PE7031----1310-Q0002_STD_39_20120927_0_500478x535021_530657x537109" decimals="4" id="id_1446237_75DF8664-713F-4411-9A2F-C81056DDD4A7_6001_7" unitRef="pure">0.1375</pten:PrincipalPaymentsPercentage>
  <dei:TradingSymbol contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_18985CF8-1E8B-4CCA-8831-3B8844E77C81_1_400000">PTEN</dei:TradingSymbol>
  <dei:EntityRegistrantName contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_18985CF8-1E8B-4CCA-8831-3B8844E77C81_1_400001">PATTERSON UTI ENERGY INC</dei:EntityRegistrantName>
  <dei:AmendmentFlag contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_F42BED72-BC1A-4ED4-B3A4-56167DFF8378_1_1">false</dei:AmendmentFlag>
  <dei:EntityFilerCategory contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_18985CF8-1E8B-4CCA-8831-3B8844E77C81_1_400004">Large Accelerated Filer</dei:EntityFilerCategory>
  <dei:DocumentFiscalPeriodFocus contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_F42BED72-BC1A-4ED4-B3A4-56167DFF8378_1_4">Q1</dei:DocumentFiscalPeriodFocus>
  <dei:DocumentFiscalYearFocus contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_F42BED72-BC1A-4ED4-B3A4-56167DFF8378_1_3">2013</dei:DocumentFiscalYearFocus>
  <dei:DocumentType contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_F42BED72-BC1A-4ED4-B3A4-56167DFF8378_1_0">10-Q</dei:DocumentType>
  <dei:DocumentPeriodEndDate contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_F42BED72-BC1A-4ED4-B3A4-56167DFF8378_1_2">2013-03-31</dei:DocumentPeriodEndDate>
  <dei:EntityCentralIndexKey contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_18985CF8-1E8B-4CCA-8831-3B8844E77C81_1_400002">0000889900</dei:EntityCentralIndexKey>
  <dei:CurrentFiscalYearEndDate contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_18985CF8-1E8B-4CCA-8831-3B8844E77C81_1_400003">--12-31</dei:CurrentFiscalYearEndDate>
  <us-gaap:CostsAndExpenses contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_13" unitRef="iso4217_USD">572107000</us-gaap:CostsAndExpenses>
  <us-gaap:IncreaseDecreaseInOtherOperatingLiabilities contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_15" unitRef="iso4217_USD">53000</us-gaap:IncreaseDecreaseInOtherOperatingLiabilities>
  <us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_6666046C-9A97-44E4-A3D6-363F3833582A_1_0">&lt;div&gt;
&lt;p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The following
table presents information necessary to calculate net income per
share for the three months ended March&amp;#xA0;31, 2013 and 2012 as
well as potentially dilutive securities excluded from the weighted
average number of diluted common shares outstanding because their
inclusion would have been anti-dilutive (in thousands, except per
share amounts):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="78%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="6%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="6%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="6" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Three Months
Ended&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;March&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;BASIC
EPS:&lt;/b&gt;&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Net income&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;56,230&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;97,274&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Adjust for income
attributed to holders of non-vested restricted stock&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(482&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(742&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Income attributed to common
stockholders&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;55,748&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;96,532&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Weighted average number of
common shares outstanding, excluding non-vested shares of
restricted stock&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;144,827&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;154,625&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Basic net income per common
share&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.38&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.62&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;DILUTED
EPS:&lt;/b&gt;&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Income attributed to common
stockholders&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;55,748&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;96,532&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Add incremental earnings
related to potential common shares&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;6&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Adjusted income attributed
to common stockholders&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;55,754&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;96,532&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Weighted average number of
common shares outstanding, excluding non-vested shares of
restricted stock&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;144,827&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;154,625&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Add dilutive effect of
potential common shares&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1,956&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;776&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Weighted average number of
diluted common shares outstanding&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;146,783&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;155,401&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Diluted net income per
common share&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.38&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.62&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Potentially dilutive
securities excluded as anti-dilutive&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1,874&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;3,229&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock>
  <us-gaap:StockholdersEquityNoteDisclosureTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_734C9BDB-3D61-4ADA-A446-DA5FE963C851_1_0">&lt;div&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr&gt;
&lt;td valign="top" width="4%" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;10.&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Stockholders&amp;#x2019;
Equity&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;!-- xbrl,body --&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&gt;Cash
Dividends&amp;#x2014;&lt;/i&gt;The Company paid cash dividends during the
three months ended March&amp;#xA0;31, 2012 and 2013 as
follows:&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;!-- Begin Table Head --&gt;
&lt;tr&gt;
&lt;td width="76%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="8%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="8%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012:&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Per&amp;#xA0;Share&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" colspan="2"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;(in&amp;#xA0;thousands)&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Head --&gt;&lt;!-- Begin Table Body --&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Paid on March&amp;#xA0;30,
2012&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.05&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;7,788&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Body --&gt;&lt;/table&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;!-- Begin Table Head --&gt;
&lt;tr&gt;
&lt;td width="76%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="8%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="8%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2013:&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Per&amp;#xA0;Share&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" colspan="2"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;(in&amp;#xA0;thousands)&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Head --&gt;&lt;!-- Begin Table Body --&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Paid on March&amp;#xA0;29,
2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.05&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;7,312&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Body --&gt;&lt;/table&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;On April 24,
2013, the Company&amp;#x2019;s Board of Directors approved a cash
dividend on its common stock in the amount of $0.05 per share to be
paid on June 28, 2013 to holders of record as of June 14, 2013. The
amount and timing of all future dividend payments, if any, are
subject to the discretion of the Board of Directors and will depend
upon business conditions, results of operations, financial
condition, terms of the Company&amp;#x2019;s credit facilities and other
factors.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;On
July&amp;#xA0;25, 2012, the Company&amp;#x2019;s Board of Directors approved
a stock buyback program authorizing purchases of up to $150 million
of the Company&amp;#x2019;s common stock in open market or privately
negotiated transactions. During the three months ended
March&amp;#xA0;31, 2013, no shares were purchased under the stock
buyback program. As of March&amp;#xA0;31, 2013, the Company has
remaining authorization to purchase approximately $51.1 million of
the Company&amp;#x2019;s outstanding common stock under the stock
buyback program. Shares purchased under the buyback programs are
accounted for as treasury stock.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The Company
purchased 637,624 shares of treasury stock from employees during
the three months ended March&amp;#xA0;31, 2013. These shares were
purchased at fair market value upon the exercise of stock options
to provide the employees with the funds necessary to pay the
exercise price of the stock option and to satisfy payroll tax
withholding obligations. The total purchase price for these shares
was approximately $15.2 million. These purchases were made pursuant
to the terms of the Patterson-UTI Energy, Inc. 2005 Long-Term
Incentive Plan and not pursuant to the stock buyback
program.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Accumulated
other comprehensive income is composed solely of amounts related to
foreign currency translation.&lt;/font&gt;&lt;/p&gt;
&lt;/div&gt;</us-gaap:StockholdersEquityNoteDisclosureTextBlock>
  <us-gaap:OperatingIncomeLoss contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_14" unitRef="iso4217_USD">94932000</us-gaap:OperatingIncomeLoss>
  <us-gaap:InterestPaidCapitalized contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_37" unitRef="iso4217_USD">2281000</us-gaap:InterestPaidCapitalized>
  <us-gaap:IncreaseDecreaseInAccountsPayable contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_13" unitRef="iso4217_USD">21385000</us-gaap:IncreaseDecreaseInAccountsPayable>
  <us-gaap:OtherComprehensiveIncomeLossTax contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_6D67A5DA-9D20-4B6F-B8FD-84332CDA139E_1_2" unitRef="iso4217_USD">0</us-gaap:OtherComprehensiveIncomeLossTax>
  <us-gaap:OilAndGasProductionExpense contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_8" unitRef="iso4217_USD">2922000</us-gaap:OilAndGasProductionExpense>
  <us-gaap:RepaymentsOfLongTermDebt contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_25" unitRef="iso4217_USD">1250000</us-gaap:RepaymentsOfLongTermDebt>
  <us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_F3A25C20-765B-47C8-BA0C-D19CD2FDEFFB_5007_1000008" unitRef="iso4217_USD">5903000</us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue>
  <us-gaap:ComprehensiveIncomeNetOfTax contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_6D67A5DA-9D20-4B6F-B8FD-84332CDA139E_1_4" unitRef="iso4217_USD">53927000</us-gaap:ComprehensiveIncomeNetOfTax>
  <us-gaap:CurrentIncomeTaxExpenseBenefit contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_22" unitRef="iso4217_USD">7573000</us-gaap:CurrentIncomeTaxExpenseBenefit>
  <us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_617556BA-FEFB-48F0-A4F7-502AD14EA74A_1_5" unitRef="iso4217_USD_per_shares" xsi:nil="true"/>
  <us-gaap:ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_A76ADE5B-5C66-4B86-A100-2611F8064217_1_0">&lt;div&gt;
&lt;p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The total
target number of shares with respect to the Stock-Settled
Performance Units is set forth below:&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="84%" align="center"&gt;
&lt;tr&gt;
&lt;td width="64%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2011&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2010&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Target number of
shares&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;192,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;144,375&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;178,750&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock>
  <us-gaap:ExplorationAbandonmentAndImpairmentExpense contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_5" unitRef="iso4217_USD">10000</us-gaap:ExplorationAbandonmentAndImpairmentExpense>
  <us-gaap:ShareBasedCompensation contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_7" unitRef="iso4217_USD">5903000</us-gaap:ShareBasedCompensation>
  <us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="2" id="id_1446237_617556BA-FEFB-48F0-A4F7-502AD14EA74A_1_2" unitRef="iso4217_USD_per_shares">18.63</us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice>
  <us-gaap:NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1 contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_40" unitRef="iso4217_USD">24039000</us-gaap:NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1>
  <us-gaap:EarningsPerShareDiluted contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="2" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_28" unitRef="iso4217_USD_per_shares">0.38</us-gaap:EarningsPerShareDiluted>
  <us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_617556BA-FEFB-48F0-A4F7-502AD14EA74A_1_4" unitRef="iso4217_USD_per_shares" xsi:nil="true"/>
  <us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_19" unitRef="iso4217_USD">707000</us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment>
  <us-gaap:ProfitLoss contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_25" unitRef="iso4217_USD">56230000</us-gaap:ProfitLoss>
  <us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_F3A25C20-765B-47C8-BA0C-D19CD2FDEFFB_5007_1000004" unitRef="iso4217_USD">0</us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross>
  <us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="INF" id="id_1446237_8E1685C2-2366-46B0-B9C9-B256E430C84F_1_400003" unitRef="shares">1150000</us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised>
  <us-gaap:FairValueDisclosuresTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_29211A45-DBCE-4BD7-83BF-AE8DB5149E7B_1_0">&lt;div&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr&gt;
&lt;td valign="top" width="4%" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;12.&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Fair Values of Financial
Instruments&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The carrying
values of cash and cash equivalents, trade receivables and accounts
payable approximate fair value due to the short-term maturity of
these items. These fair value estimates are considered Level 1 fair
value estimates in the fair value hierarchy of fair value
accounting.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The estimated
fair value of the Company&amp;#x2019;s outstanding debt balances
(including current portion) as of March&amp;#xA0;31, 2013 and
December&amp;#xA0;31, 2012 is set forth below (in
thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="92%" align="center"&gt;
&lt;tr&gt;
&lt;td width="64%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="3%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="3%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="3%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="3%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" colspan="6" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;March&amp;#xA0;31,
2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" colspan="6" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;December&amp;#xA0;31,
2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Carrying&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Fair&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Carrying&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Fair&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Borrowings under Credit
Agreement:&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Term loan
facility&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;97,500&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;97,500&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;98,750&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;98,750&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;4.97% Series A Senior
Notes&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;300,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;321,743&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;300,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;329,281&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;4.27% Series B Senior
Notes&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;300,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;303,342&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;300,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;310,591&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Total debt&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;697,500&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;722,585&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;698,750&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;738,622&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The carrying
values of the balances outstanding under the term loan approximate
their fair values as this instrument has a floating interest rate.
The fair value of the 4.97% Series A Senior Notes and the 4.27%
Series B Senior Notes at March&amp;#xA0;31, 2013 and December&amp;#xA0;31,
2012 are based on discounted cash flows associated with the
respective notes using current market rates of interest at those
respective dates.&amp;#xA0;For the 4.97% Series A Senior Notes, the
current market rates used in measuring this fair value were 3.49%
at March&amp;#xA0;31, 2013 and 3.36% at December&amp;#xA0;31,
2012.&amp;#xA0;For the 4.27% Series B Senior Notes, the current market
rate used in measuring this fair value was 3.85% at March&amp;#xA0;31,
2013 and 3.70% at December&amp;#xA0;31, 2012. These fair value
estimates are based on observable market inputs and are considered
Level 2 fair value estimates in the fair value hierarchy of fair
value accounting.&lt;/font&gt;&lt;/p&gt;
&lt;/div&gt;</us-gaap:FairValueDisclosuresTextBlock>
  <us-gaap:DividendPayableDateToBePaidDayMonthAndYear contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_0F488D4E-0F1D-41DE-8BC6-091407754EC9_2_1">2013-03-29</us-gaap:DividendPayableDateToBePaidDayMonthAndYear>
  <us-gaap:PaymentsForRepurchaseOfCommonStock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_22" unitRef="iso4217_USD">15201000</us-gaap:PaymentsForRepurchaseOfCommonStock>
  <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_8E1685C2-2366-46B0-B9C9-B256E430C84F_1_5" unitRef="shares" xsi:nil="true"/>
  <us-gaap:ScheduleOfChangeInAssetRetirementObligationTableTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_0D1E34ED-CAE6-4699-ABD4-4B1C8B75073C_1_0">&lt;div&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The following
table describes the changes to the Company&amp;#x2019;s asset retirement
obligations during the three months ended March&amp;#xA0;31, 2013 and
2012 (in thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="82%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="6" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Three&amp;#xA0;Months&amp;#xA0;Ended&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;March&amp;#xA0;
31,&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Balance at beginning of
year&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;4,422&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;3,455&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Liabilities
incurred&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;71&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;106&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Liabilities
settled&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(13&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(68&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Accretion
expense&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;41&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;37&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Revision in estimated costs
of plugging oil and natural gas wells&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;550&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Asset retirement obligation
at end of period&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;4,521&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;4,080&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:ScheduleOfChangeInAssetRetirementObligationTableTextBlock>
  <us-gaap:FairValueByBalanceSheetGroupingTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_F4FDFC03-D534-4DE1-91D7-2B557B6CC9F6_1_0">&lt;div&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The estimated
fair value of the Company&amp;#x2019;s outstanding debt balances
(including current portion) as of March&amp;#xA0;31, 2013 and
December&amp;#xA0;31, 2012 is set forth below (in
thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="92%" align="center"&gt;
&lt;tr&gt;
&lt;td width="64%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="3%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="3%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="3%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="3%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" colspan="6" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;March&amp;#xA0;31,
2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" colspan="6" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;December&amp;#xA0;31,
2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Carrying&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Fair&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Carrying&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Fair&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Borrowings under Credit
Agreement:&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Term loan
facility&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;97,500&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;97,500&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;98,750&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;98,750&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;4.97% Series A Senior
Notes&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;300,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;321,743&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;300,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;329,281&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;4.27% Series B Senior
Notes&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;300,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;303,342&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;300,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;310,591&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Total debt&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;697,500&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;722,585&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;698,750&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;738,622&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:FairValueByBalanceSheetGroupingTextBlock>
  <us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_B2C15CD3-C38B-41C5-826E-84A2F32C06D8_1_0">&lt;div&gt;
&lt;p style="TEXT-TRANSFORM: none; MARGIN-TOP: 6px; TEXT-INDENT: 4%; LETTER-SPACING: normal; FONT: medium 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"&gt;
&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Separate
financial data for each of our business segments is provided in the
table below (in thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="TEXT-TRANSFORM: none; MARGIN-TOP: 0px; TEXT-INDENT: 0px; LETTER-SPACING: normal; FONT: 12px 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="78%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="6" align="center"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;Three Months
Ended&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;March&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Revenues:&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Contract
drilling&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;420,233&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;490,703&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Pressure
pumping&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;231,160&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;241,722&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Oil and natural
gas&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;16,785&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;14,717&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Total segment
revenues&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;668,178&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;747,142&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Elimination of
intercompany revenues (a)&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(1,139&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(1,221&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Total revenues&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;667,039&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;745,921&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Income before income
taxes:&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Contract
drilling&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;72,549&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;111,771&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Pressure
pumping&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;28,515&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;46,787&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Oil and natural
gas&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;6,241&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;7,518&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;107,305&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;166,076&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Corporate and
other&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(12,248&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(10,812&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Net gain (loss) on asset
disposals (b)&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(125&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;2,400&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Interest
income&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;173&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;54&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Interest
expense&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(6,766&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(4,582&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Other&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;19&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;55&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Income before income
taxes&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;88,358&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;153,191&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="TEXT-TRANSFORM: none; MARGIN-TOP: 0px; TEXT-INDENT: 0px; LETTER-SPACING: normal; FONT: 12px 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="74%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;March&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;December&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Identifiable
assets:&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Contract
drilling&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;3,607,349&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;3,538,289&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Pressure
pumping&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;802,050&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;784,128&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Oil and natural
gas&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;55,212&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;54,188&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Corporate and other
(c)&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;192,621&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;180,306&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Total assets&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;4,657,232&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;4,556,911&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="BORDER-BOTTOM: rgb(0,0,0) 0.5pt solid; TEXT-TRANSFORM: none; MARGIN-TOP: 0px; TEXT-INDENT: 0px; WIDTH: 140px; LETTER-SPACING: normal; FONT: medium/8px 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 2px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="100%" align="center"&gt;
&lt;tr&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="3%"&gt;&lt;/td&gt;
&lt;td width="95%"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(a)&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Consists of contract drilling intercompany revenues for
drilling services provided to the oil and natural gas exploration
and production segment.&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(b)&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Net gains or losses associated with the disposal of assets
relate to corporate strategy decisions of the executive management
group. Accordingly, the related gains or losses have been
separately presented and excluded from the results of specific
segments.&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(c)&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Corporate and other assets primarily include cash on hand and
certain deferred tax assets.&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock>
  <us-gaap:ProceedsFromStockOptionsExercised contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_28" unitRef="iso4217_USD">18622000</us-gaap:ProceedsFromStockOptionsExercised>
  <us-gaap:ScheduleOfGoodwillTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_B1522A87-E3AB-4BC7-98C6-10F3C4A186F6_1_0">&lt;div&gt;
&lt;p style="TEXT-TRANSFORM: none; MARGIN-TOP: 6px; TEXT-INDENT: 4%; LETTER-SPACING: normal; FONT: medium 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"&gt;
&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&lt;i&gt;Goodwill&amp;#xA0;&lt;/i&gt;&amp;#x2014; Goodwill by
operating segment as of March&amp;#xA0;31, 2013 and changes for the
three months then ended are as follows (in thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="TEXT-TRANSFORM: none; MARGIN-TOP: 0px; TEXT-INDENT: 0px; LETTER-SPACING: normal; FONT: 12px 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="84%" align="center"&gt;
&lt;tr&gt;
&lt;td width="72%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;Contract&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;Drilling&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;Pressure&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;Pumping&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Balance December&amp;#xA0;31,
2012&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;86,234&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;67,575&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;153,809&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Changes to
goodwill&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Balance March&amp;#xA0;31,
2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;86,234&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;67,575&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;153,809&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;br class="Apple-interchange-newline" /&gt;&lt;/div&gt;</us-gaap:ScheduleOfGoodwillTextBlock>
  <us-gaap:NetCashProvidedByUsedInOperatingActivities contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_16" unitRef="iso4217_USD">209717000</us-gaap:NetCashProvidedByUsedInOperatingActivities>
  <us-gaap:ScheduleOfNonvestedShareActivityTableTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_777C763C-F840-405B-BF1E-73C0BE75682B_1_0">&lt;div&gt;
&lt;p style="MARGIN-TOP: 18px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Restricted
stock activity from January&amp;#xA0;1, 2013 to March&amp;#xA0;31, 2013
follows:&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="76%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Shares&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Weighted&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Average&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Grant&amp;#xA0;Date&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Fair
Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Non-vested restricted stock
outstanding at January&amp;#xA0;1, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1,279,146&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;20.03&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Granted&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;18,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;18.63&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Vested&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(56,668&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;22.20&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Forfeited&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(15,570&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;19.68&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Non-vested restricted stock
outstanding at March 31, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1,224,908&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;19.92&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:ScheduleOfNonvestedShareActivityTableTextBlock>
  <us-gaap:NetCashProvidedByUsedInInvestingActivities contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_20" unitRef="iso4217_USD">-173454000</us-gaap:NetCashProvidedByUsedInInvestingActivities>
  <us-gaap:InvestmentIncomeInterest contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_16" unitRef="iso4217_USD">173000</us-gaap:InvestmentIncomeInterest>
  <us-gaap:PropertyPlantAndEquipmentTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_C3A6153A-C168-4D39-8F86-E1DBC9A003A1_1_0">&lt;div&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Property and
equipment consisted of the following at March&amp;#xA0;31, 2013 and
December&amp;#xA0;31, 2012 (in thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="72%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="6%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="6%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;March&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;December&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Equipment&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,545,029&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,387,490&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Oil and natural gas
properties&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;164,824&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;156,834&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Buildings&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;67,585&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;66,490&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Land&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;11,899&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;10,413&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,789,337&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,621,227&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Less accumulated
depreciation and depletion&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(2,106,587&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(2,005,844&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Property and equipment,
net&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;3,682,750&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;3,615,383&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:PropertyPlantAndEquipmentTextBlock>
  <us-gaap:TreasuryStockValueAcquiredCostMethod contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_F3A25C20-765B-47C8-BA0C-D19CD2FDEFFB_5007_1000011" unitRef="iso4217_USD">15201000</us-gaap:TreasuryStockValueAcquiredCostMethod>
  <us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="2" id="id_1446237_617556BA-FEFB-48F0-A4F7-502AD14EA74A_1_3" unitRef="iso4217_USD_per_shares">16.19</us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice>
  <us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_FE827D27-286E-4189-8744-41441080E11F_1_0">&lt;div&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The following
table presents the gross carrying amount and accumulated
amortization of intangible assets as of March&amp;#xA0;31, 2013 and
December&amp;#xA0;31, 2012 (in thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%" align="center"&gt;
&lt;!-- Begin Table Head --&gt;
&lt;tr&gt;
&lt;td width="53%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="2%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="2%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="2%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="2%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="2%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="2%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="10" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;March&amp;#xA0;31,
2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="10" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;December&amp;#xA0;31,
2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Gross&lt;br /&gt;
Carrying&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Amount&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Accumulated&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Amortization&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Net&lt;br /&gt;
Carrying&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Amount&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Gross&lt;br /&gt;
Carrying&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Amount&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Accumulated&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Amortization&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Net&lt;br /&gt;
Carrying&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Amount&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Head --&gt;&lt;!-- Begin Table Body --&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Non-compete
agreement&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1,400&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(1,167&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;233&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1,400&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(1,050&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;350&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Customer
relationships&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;25,500&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(9,107&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;16,393&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;25,500&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(8,196&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;17,304&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Total intangible
assets&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;26,900&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(10,274&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;16,626&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;26,900&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(9,246&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;17,654&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Body --&gt;&lt;/table&gt;
&lt;p style="MARGIN-TOP: 18px; MARGIN-BOTTOM: 0px; FONT-SIZE: 1px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;!-- xbrl,n --&gt;&lt;/div&gt;</us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock>
  <us-gaap:AmortizationOfFinancingCosts contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="0" id="id_1446237_72EBEB7F-3608-4B48-8F58-0C457B9E0CAD_3_3" unitRef="iso4217_USD">547000</us-gaap:AmortizationOfFinancingCosts>
  <us-gaap:AssetRetirementObligationLiabilitiesIncurred contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_4760AA18-3DBF-4E66-892B-DE441A7B8F68_1_1" unitRef="iso4217_USD">71000</us-gaap:AssetRetirementObligationLiabilitiesIncurred>
  <us-gaap:PaymentsToAcquirePropertyPlantAndEquipment contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_18" unitRef="iso4217_USD">174161000</us-gaap:PaymentsToAcquirePropertyPlantAndEquipment>
  <us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_31" unitRef="iso4217_USD">33308000</us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease>
  <us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_31" unitRef="shares">146783000</us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding>
  <us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_A970665B-0A9A-4A60-8E03-2C058096135C_1_0">&lt;div&gt;
&lt;p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Stock option
activity from January&amp;#xA0;1, 2013 to March&amp;#xA0;31, 2013
follows:&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="76%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Underlying&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Shares&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Weighted&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Average&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Exercise&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Price&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Outstanding at
January&amp;#xA0;1, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;7,827,195&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;20.35&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Granted&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;60,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;18.63&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Exercised&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(1,150,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;16.19&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Cancelled&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Expired&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Outstanding at
March&amp;#xA0;31, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;6,737,195&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;21.04&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Exercisable at
March&amp;#xA0;31, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,738,036&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;21.49&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock>
  <us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_F3A25C20-765B-47C8-BA0C-D19CD2FDEFFB_5007_1000007" unitRef="iso4217_USD">18622000</us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised>
  <us-gaap:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_F3A25C20-765B-47C8-BA0C-D19CD2FDEFFB_5007_1000009" unitRef="iso4217_USD">2737000</us-gaap:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet>
  <us-gaap:OtherNonoperatingIncome contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_18" unitRef="iso4217_USD">19000</us-gaap:OtherNonoperatingIncome>
  <us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_2D4C59F2-1106-4A59-99CA-4019621ED06A_1_0">&lt;div&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr&gt;
&lt;td valign="top" width="4%" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;5.&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Goodwill and Intangible
Assets&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;!-- xbrl,body --&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&gt;Goodwill&lt;/i&gt;
&amp;#x2014; Goodwill by operating segment as of March&amp;#xA0;31, 2013 and
changes for the three months then ended are as follows (in
thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="84%" align="center"&gt;
&lt;!-- Begin Table Head --&gt;
&lt;tr&gt;
&lt;td width="72%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Contract&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Drilling&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Pressure&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Pumping&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Head --&gt;&lt;!-- Begin Table Body --&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Balance December&amp;#xA0;31,
2012&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;86,234&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;67,575&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;153,809&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Changes to
goodwill&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Balance March&amp;#xA0;31,
2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;86,234&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;67,575&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;153,809&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Body --&gt;&lt;/table&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;There were no
accumulated impairment losses as of March&amp;#xA0;31, 2013 or
December&amp;#xA0;31, 2012.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Goodwill is
evaluated at least annually on December&amp;#xA0;31, or when
circumstances require, to determine if the fair value of recorded
goodwill has decreased below its carrying value. For purposes of
impairment testing, goodwill is evaluated at the reporting unit
level. The Company&amp;#x2019;s reporting units for impairment testing
have been determined to be its operating segments. The Company
first determines whether it is more likely than not that the fair
value of a reporting unit is less than its carrying value after
considering qualitative, market and other factors. If so, then
goodwill impairment is determined using a two-step impairment test.
The first step is to compare the fair value of an entity&amp;#x2019;s
reporting units to the respective carrying value of those reporting
units. If the carrying value of a reporting unit exceeds its fair
value, the second step of the impairment test is performed whereby
the fair value of the reporting unit is allocated to its
identifiable tangible and intangible assets and liabilities with
any remaining fair value representing the fair value of goodwill.
If this resulting fair value of goodwill is less than the carrying
value of goodwill, an impairment loss would be recognized in the
amount of the shortfall.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&gt;Intangible
Assets&lt;/i&gt; &amp;#x2014; Intangible assets were recorded in the pressure
pumping operating segment in connection with the fourth quarter
2010 acquisition of the assets of a pressure pumping business. As a
result of the purchase price allocation, the Company recorded
intangible assets related to a non-compete agreement and the
customer relationships acquired. These intangible assets were
recorded at fair value on the date of acquisition.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The non-compete
agreement has a term of three years from October&amp;#xA0;1, 2010. The
value of this agreement was estimated using a with and without
scenario where cash flows were projected through the term of the
agreement assuming the agreement is in place and compared to cash
flows assuming the non-compete agreement was not in place. The
intangible asset associated with the non-compete agreement is being
amortized on a straight-line basis over the three-year term of the
agreement. Amortization expense of approximately $117,000 was
recorded in the three months ended March&amp;#xA0;31, 2013 and
2012.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The value of
the customer relationships was estimated using a multi-period
excess earnings model to determine the present value of the
projected cash flows associated with the customers in place at the
time of the acquisition and taking into account a contributory
asset charge. The resulting intangible asset is being amortized on
a straight-line basis over seven years. Amortization expense of
approximately $911,000 was recorded in the three months ended
March&amp;#xA0;31, 2013 and 2012 associated with customer
relationships.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The following
table presents the gross carrying amount and accumulated
amortization of intangible assets as of March&amp;#xA0;31, 2013 and
December&amp;#xA0;31, 2012 (in thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%" align="center"&gt;
&lt;!-- Begin Table Head --&gt;
&lt;tr&gt;
&lt;td width="53%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="2%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="2%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="2%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="2%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="2%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="2%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="10" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;March&amp;#xA0;31,
2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="10" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;December&amp;#xA0;31,
2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Gross&lt;br /&gt;
Carrying&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Amount&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Accumulated&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Amortization&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Net&lt;br /&gt;
Carrying&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Amount&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Gross&lt;br /&gt;
Carrying&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Amount&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Accumulated&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Amortization&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Net&lt;br /&gt;
Carrying&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Amount&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Head --&gt;&lt;!-- Begin Table Body --&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Non-compete
agreement&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1,400&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(1,167&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;233&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1,400&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(1,050&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;350&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Customer
relationships&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;25,500&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(9,107&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;16,393&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;25,500&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(8,196&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;17,304&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Total intangible
assets&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;26,900&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(10,274&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;16,626&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;26,900&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(9,246&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;17,654&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Body --&gt;&lt;/table&gt;
&lt;p style="MARGIN-TOP: 18px; MARGIN-BOTTOM: 0px; FONT-SIZE: 1px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;!-- xbrl,n --&gt;&lt;/div&gt;</us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock>
  <us-gaap:SalesRevenueNet contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_4" unitRef="iso4217_USD">667039000</us-gaap:SalesRevenueNet>
  <us-gaap:IncreaseDecreaseInAccountsReceivable contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_10" unitRef="iso4217_USD">25220000</us-gaap:IncreaseDecreaseInAccountsReceivable>
  <us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_F3A25C20-765B-47C8-BA0C-D19CD2FDEFFB_5007_1000003" unitRef="iso4217_USD">-2303000</us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax>
  <us-gaap:AssetRetirementObligationDisclosureTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_AEFCA436-5E4E-4A2F-932E-EF30BCE524D7_1_0">&lt;div&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr&gt;
&lt;td valign="top" width="4%" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;7.&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Asset Retirement
Obligation&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The Company
records a liability for the estimated costs to be incurred in
connection with the abandonment of oil and natural gas properties
in the future. This liability is included in the caption
&amp;#x201C;other&amp;#x201D; in the liabilities section of the consolidated
balance sheet. The following table describes the changes to the
Company&amp;#x2019;s asset retirement obligations during the three
months ended March&amp;#xA0;31, 2013 and 2012 (in
thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="82%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="6" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Three&amp;#xA0;Months&amp;#xA0;Ended&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;March&amp;#xA0;
31,&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Balance at beginning of
year&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;4,422&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;3,455&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Liabilities
incurred&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;71&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;106&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Liabilities
settled&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(13&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(68&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Accretion
expense&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;41&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;37&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Revision in estimated costs
of plugging oil and natural gas wells&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;550&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Asset retirement obligation
at end of period&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;4,521&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;4,080&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:AssetRetirementObligationDisclosureTextBlock>
  <us-gaap:DividendsCommonStockCash contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_F3A25C20-765B-47C8-BA0C-D19CD2FDEFFB_5007_1000010" unitRef="iso4217_USD">7312000</us-gaap:DividendsCommonStockCash>
  <us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_20" unitRef="iso4217_USD">88358000</us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments>
  <us-gaap:EarningsPerShareBasic contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="2" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_27" unitRef="iso4217_USD_per_shares">0.38</us-gaap:EarningsPerShareBasic>
  <us-gaap:NetCashProvidedByUsedInFinancingActivities contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_29" unitRef="iso4217_USD">-2404000</us-gaap:NetCashProvidedByUsedInFinancingActivities>
  <us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_80140BD8-5B20-414E-984D-14F9183C96B8_1_0">&lt;div&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr&gt;
&lt;td valign="top" width="4%" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;3.&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Property and
Equipment&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Property and
equipment consisted of the following at March&amp;#xA0;31, 2013 and
December&amp;#xA0;31, 2012 (in thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="72%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="6%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="6%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;March&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;December&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Equipment&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,545,029&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,387,490&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Oil and natural gas
properties&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;164,824&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;156,834&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Buildings&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;67,585&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;66,490&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Land&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;11,899&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;10,413&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,789,337&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,621,227&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Less accumulated
depreciation and depletion&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(2,106,587&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(2,005,844&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Property and equipment,
net&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;3,682,750&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;3,615,383&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock>
  <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_8E1685C2-2366-46B0-B9C9-B256E430C84F_1_4" unitRef="shares" xsi:nil="true"/>
  <us-gaap:WeightedAverageNumberOfSharesOutstandingBasic contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_30" unitRef="shares">144827000</us-gaap:WeightedAverageNumberOfSharesOutstandingBasic>
  <us-gaap:IncomeTaxDisclosureTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_F88E6CD7-87ED-47DA-B609-1221E0E26477_1_0">&lt;div&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr&gt;
&lt;td valign="top" width="4%" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;11.&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Income
Taxes&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;On
January&amp;#xA0;1, 2010, the Company converted its Canadian operations
from a Canadian branch to a controlled foreign corporation for
Federal income tax purposes. Because the statutory tax rates in
Canada are lower than those in the United States, this transaction
triggered a $5.1 million reduction in the Company&amp;#x2019;s deferred
tax liabilities, which is being amortized as a reduction to
deferred income tax expense over the weighted average remaining
useful life of the Canadian assets.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;As a result of
the above conversion, the Company&amp;#x2019;s Canadian assets are no
longer directly subject to United States taxation, provided that
the related unremitted earnings are permanently reinvested in
Canada. Effective January&amp;#xA0;1, 2010, the Company has elected to
permanently reinvest these unremitted earnings in Canada, and
intends to do so for the foreseeable future. As a result, no
deferred United States federal or state income taxes have been
provided on such unremitted foreign earnings, which totaled
approximately $33.7 million as of March&amp;#xA0;31, 2013. The
unrecognized deferred tax liability associated with these earnings
was approximately $5.1 million, net of available foreign tax
credits. This liability would be recognized if the Company received
a dividend of these unremitted earnings.&lt;/font&gt;&lt;/p&gt;
&lt;/div&gt;</us-gaap:IncomeTaxDisclosureTextBlock>
  <us-gaap:NumberOfReportableSegments contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="INF" id="id_1446237_E3A3EEC4-8EC2-46EB-A01E-0C88F2ADFF9C_1_0" unitRef="Segment">3</us-gaap:NumberOfReportableSegments>
  <us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_FBAE3D4B-863F-4443-8901-DCB18CB38934_1_11" unitRef="shares">1956000</us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment>
  <us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_B0A43080-AE2B-42AB-B5D3-9243319FCFC2_1_0">&lt;div&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Accrued
expenses consisted of the following at March&amp;#xA0;31, 2013 and
December&amp;#xA0;31, 2012 (in thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="74%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="6%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="6%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;March&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;December&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Salaries, wages, payroll
taxes and benefits&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;39,276&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;55,430&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Workers&amp;#x2019; compensation
liability&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;66,755&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;68,441&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Property, sales, use and
other taxes&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;7,211&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;9,749&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Insurance, other than
workers&amp;#x2019; compensation&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;6,104&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;10,419&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Accrued interest
payable&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;14,518&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;7,664&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Deferred
revenue&amp;#x2014;current&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1,523&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Other&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;7,653&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,406&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;141,517&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;158,632&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock>
  <us-gaap:ScheduleOfMaturitiesOfLongTermDebtTableTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_F8D9FB63-3750-442F-8E94-85BD1AC4096F_1_0">&lt;div&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Presented below
is a schedule of the principal repayment requirements of long-term
debt by fiscal year as of March&amp;#xA0;31, 2013 (in
thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="68%" align="center"&gt;
&lt;tr&gt;
&lt;td width="87%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top" colspan="4"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Year ending
December&amp;#xA0;31,&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;2014&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;10,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;2015&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;12,500&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;2016&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;28,750&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;2017&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;41,250&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Thereafter&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;600,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Total&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;697,500&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:ScheduleOfMaturitiesOfLongTermDebtTableTextBlock>
  <us-gaap:OilAndGasSalesRevenue contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_3" unitRef="iso4217_USD">16785000</us-gaap:OilAndGasSalesRevenue>
  <us-gaap:IncomeTaxesPaidNet contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_38" unitRef="iso4217_USD">-3543000</us-gaap:IncomeTaxesPaidNet>
  <us-gaap:CommonStockDividendsPerShareCashPaid contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="2" id="id_1446237_0F488D4E-0F1D-41DE-8BC6-091407754EC9_2_2" unitRef="iso4217_USD_per_shares">0.05</us-gaap:CommonStockDividendsPerShareCashPaid>
  <us-gaap:GainLossOnSaleOfPropertyPlantEquipment contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_11" unitRef="iso4217_USD">-125000</us-gaap:GainLossOnSaleOfPropertyPlantEquipment>
  <us-gaap:CommitmentsAndContingenciesDisclosureTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_92CEAAAA-7212-4E43-8F9F-FC78930F27D2_1_0">&lt;div&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr&gt;
&lt;td valign="top" width="4%" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;9.&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Commitments,
Contingencies and Other Matters&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;!-- xbrl,body --&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;As of
March&amp;#xA0;31, 2013, the Company maintained letters of credit in
the aggregate amount of $39.8 million for the benefit of various
insurance companies as collateral for retrospective premiums and
retained losses which could become payable under the terms of the
underlying insurance contracts. These letters of credit expire
annually at various times during the year and are typically
renewed. As of March&amp;#xA0;31, 2013, no amounts had been drawn under
the letters of credit.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;As of
March&amp;#xA0;31, 2013, the Company had commitments to purchase
approximately $128 million of major equipment for its drilling and
pressure pumping businesses.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The
Company&amp;#x2019;s pressure pumping business has entered into
agreements to purchase minimum quantities of proppants and
chemicals from certain vendors. These agreements expire in 2016 and
2017. As of March&amp;#xA0;31, 2013, the remaining obligation under
these agreements is approximately $35.0 million, of which materials
with a total purchase price of approximately $7.2 million are
expected to be delivered during the last three quarters of 2013. In
the event that the required minimum quantities are not purchased
during any contract year, the Company would be required to make a
liquidated damages payment to the respective vendor for any
shortfall.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px; FONT-SIZE: 1px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;In November of
2011, the Company&amp;#x2019;s pressure pumping business entered into an
agreement with a proppant vendor to advance, on a non-revolving
basis, up to $12.0 million to such vendor to finance the
construction of certain processing facilities. This advance is
secured by the underlying processing facilities and bears interest
at an annual rate of 5.0%. Repayment of the advance is to be made
through discounts applied to purchases from the vendor and
repayment of all amounts advanced must be made no later than
October&amp;#xA0;1, 2017. As of March&amp;#xA0;31, 2013, advances of
approximately $11.8 million had been made under this agreement and
repayments of approximately $531,000 had been received resulting in
a balance outstanding of approximately $11.2 million.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The Company is
party to various legal proceedings arising in the normal course of
its business. The Company does not believe that the outcome of
these proceedings, either individually or in the aggregate, will
have a material adverse effect on its financial condition, results
of operations or cash flows.&lt;/font&gt;&lt;/p&gt;
&lt;/div&gt;</us-gaap:CommitmentsAndContingenciesDisclosureTextBlock>
  <us-gaap:SegmentReportingDisclosureTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_F1F56E55-033A-4071-97CB-6B9FDE0535D2_1_0">&lt;div&gt;
&lt;table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr&gt;
&lt;td valign="top" width="4%" align="left"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&lt;b&gt;4.&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top" align="left"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&lt;b&gt;Business
Segments&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="TEXT-TRANSFORM: none; MARGIN-TOP: 6px; TEXT-INDENT: 4%; LETTER-SPACING: normal; FONT: medium 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"&gt;
&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;The
Company&amp;#x2019;s revenues, operating profits and identifiable assets
are primarily attributable to three business segments:
(i)&amp;#xA0;contract drilling of oil and natural gas wells,
(ii)&amp;#xA0;pressure pumping services and (iii)&amp;#xA0;the investment,
on a non-operating working interest basis, in oil and natural gas
properties. Each of these segments represents a distinct type of
business. These segments have separate management teams which
report to the Company&amp;#x2019;s chief operating decision maker. The
results of operations in these segments are regularly reviewed by
the chief operating decision maker for purposes of determining
resource allocation and assessing performance. Separate financial
data for each of our business segments is provided in the table
below (in thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="TEXT-TRANSFORM: none; MARGIN-TOP: 0px; TEXT-INDENT: 0px; LETTER-SPACING: normal; FONT: 12px 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="78%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="6" align="center"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;Three Months
Ended&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;March&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Revenues:&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Contract
drilling&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;420,233&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;490,703&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Pressure
pumping&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;231,160&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;241,722&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Oil and natural
gas&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;16,785&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;14,717&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Total segment
revenues&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;668,178&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;747,142&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Elimination of
intercompany revenues (a)&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(1,139&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(1,221&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Total revenues&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;667,039&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;745,921&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Income before income
taxes:&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Contract
drilling&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;72,549&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;111,771&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Pressure
pumping&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;28,515&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;46,787&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Oil and natural
gas&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;6,241&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;7,518&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;107,305&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;166,076&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Corporate and
other&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(12,248&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(10,812&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Net gain (loss) on asset
disposals (b)&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(125&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;2,400&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Interest
income&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;173&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;54&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Interest
expense&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(6,766&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(4,582&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Other&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;19&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;55&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Income before income
taxes&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;88,358&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;153,191&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="TEXT-TRANSFORM: none; MARGIN-TOP: 0px; TEXT-INDENT: 0px; LETTER-SPACING: normal; FONT: 12px 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="74%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="4%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;March&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;December&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: 'Times New Roman'" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Identifiable
assets:&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Contract
drilling&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;3,607,349&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;3,538,289&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Pressure
pumping&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;802,050&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;784,128&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Oil and natural
gas&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;55,212&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;54,188&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Corporate and other
(c)&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;192,621&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;180,306&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Total assets&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;4,657,232&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;4,556,911&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: rgb(0,0,0) 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="BORDER-BOTTOM: rgb(0,0,0) 0.5pt solid; TEXT-TRANSFORM: none; MARGIN-TOP: 0px; TEXT-INDENT: 0px; WIDTH: 140px; LETTER-SPACING: normal; FONT: medium/8px 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 2px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="100%" align="center"&gt;
&lt;tr&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="3%"&gt;&lt;/td&gt;
&lt;td width="95%"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(a)&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Consists of contract drilling intercompany revenues for
drilling services provided to the oil and natural gas exploration
and production segment.&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(b)&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Net gains or losses associated with the disposal of assets
relate to corporate strategy decisions of the executive management
group. Accordingly, the related gains or losses have been
separately presented and excluded from the results of specific
segments.&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;(c)&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top"&gt;&lt;font style="FONT-FAMILY: 'Times New Roman'" size="2"&gt;Corporate and other assets primarily include cash on hand and
certain deferred tax assets.&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:SegmentReportingDisclosureTextBlock>
  <us-gaap:ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_5927DD92-3516-426E-BD0D-C7B078CBEF9C_1_0">&lt;div&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Restricted
stock unit activity from January&amp;#xA0;1, 2013 to March&amp;#xA0;31,
2013 follows:&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="79%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Shares&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Weighted&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Average&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Grant&amp;#xA0;Date&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Fair&amp;#xA0;Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Non-vested restricted stock
units outstanding at January&amp;#xA0;1, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;17,670&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;20.08&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Granted&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Vested&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Forfeited&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Non-vested restricted stock
units outstanding at March 31, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;17,670&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;20.08&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock>
  <us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_709F59F1-FB0C-4447-86D1-2FA309A1651F_1_0">&lt;div&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr&gt;
&lt;td valign="top" width="4%" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;6.&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Accrued
Expenses&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Accrued
expenses consisted of the following at March&amp;#xA0;31, 2013 and
December&amp;#xA0;31, 2012 (in thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="74%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="6%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="6%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;March&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;December&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Salaries, wages, payroll
taxes and benefits&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;39,276&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;55,430&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Workers&amp;#x2019; compensation
liability&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;66,755&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;68,441&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Property, sales, use and
other taxes&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;7,211&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;9,749&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Insurance, other than
workers&amp;#x2019; compensation&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;6,104&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;10,419&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Accrued interest
payable&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;14,518&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;7,664&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Deferred
revenue&amp;#x2014;current&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1,523&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Other&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;7,653&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,406&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;141,517&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;158,632&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Deferred
revenue was recorded in the fourth quarter of 2010 in the purchase
price allocation associated with the Company&amp;#x2019;s acquisition of
a pressure pumping business. The deferred revenue related to
out-of-market pricing agreements that were in place at the acquired
business at the time of the acquisition. The deferred revenue was
recognized as pressure pumping revenue over the term of the pricing
agreements, which have now expired. Deferred revenue of
approximately $1.5 million and $1.8 million was recognized in the
three months ended March&amp;#xA0;31, 2013 and 2012, respectively,
related to these pricing agreements.&lt;/font&gt;&lt;/p&gt;
&lt;/div&gt;</us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock>
  <us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_F3A25C20-765B-47C8-BA0C-D19CD2FDEFFB_5007_1000006" unitRef="iso4217_USD">0</us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures>
  <us-gaap:DeferredIncomeTaxExpenseBenefit contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_23" unitRef="iso4217_USD">24555000</us-gaap:DeferredIncomeTaxExpenseBenefit>
  <us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_FBAE3D4B-863F-4443-8901-DCB18CB38934_1_14" unitRef="shares">1874000</us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount>
  <us-gaap:AssetRetirementObligationLiabilitiesSettled contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_4760AA18-3DBF-4E66-892B-DE441A7B8F68_1_2" unitRef="iso4217_USD">13000</us-gaap:AssetRetirementObligationLiabilitiesSettled>
  <us-gaap:NonoperatingIncomeExpense contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_19" unitRef="iso4217_USD">-6574000</us-gaap:NonoperatingIncomeExpense>
  <us-gaap:ExcessTaxBenefitFromShareBasedCompensationFinancingActivities contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_24" unitRef="iso4217_USD">2737000</us-gaap:ExcessTaxBenefitFromShareBasedCompensationFinancingActivities>
  <us-gaap:SellingGeneralAndAdministrativeExpense contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_10" unitRef="iso4217_USD">17397000</us-gaap:SellingGeneralAndAdministrativeExpense>
  <us-gaap:DeferredRevenueRevenueRecognized contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-5" id="id_1446237_1D813FC1-DC6E-4365-9D73-820FBDC6FB42_1_0" unitRef="iso4217_USD">1500000</us-gaap:DeferredRevenueRevenueRecognized>
  <us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="INF" id="id_1446237_8E1685C2-2366-46B0-B9C9-B256E430C84F_1_400002" unitRef="shares">60000</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod>
  <us-gaap:IncomeTaxExpenseBenefit contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_24" unitRef="iso4217_USD">32128000</us-gaap:IncomeTaxExpenseBenefit>
  <us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_30" unitRef="iso4217_USD">-551000</us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents>
  <us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_FBAE3D4B-863F-4443-8901-DCB18CB38934_1_3" unitRef="iso4217_USD">55748000</us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic>
  <us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_6A59B7F3-2606-429B-B2E1-A1EA67111BBC_1_0">&lt;div&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr&gt;
&lt;td valign="top" width="4%" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;1.&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Basis of Consolidation
and Presentation&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The unaudited
interim consolidated financial statements include the accounts of
Patterson-UTI Energy, Inc. (the &amp;#x201C;Company&amp;#x201D;) and its
wholly-owned subsidiaries. All significant intercompany accounts
and transactions have been eliminated. Except for wholly-owned
subsidiaries, the Company has no controlling financial interests in
any entity which would require consolidation.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The unaudited
interim consolidated financial statements have been prepared by
management of the Company pursuant to the rules and regulations of
the Securities and Exchange Commission. Certain information and
footnote disclosures normally included in financial statements
prepared in accordance with accounting principles generally
accepted in the United States of America have been omitted pursuant
to such rules and regulations, although the Company believes the
disclosures included either on the face of the financial statements
or herein are sufficient to make the information presented not
misleading. In the opinion of management, all adjustments which are
of a normal recurring nature considered necessary for a fair
statement of the information in conformity with accounting
principles generally accepted in the United States of America have
been included. The Unaudited Consolidated Balance Sheet as of
December&amp;#xA0;31, 2012, as presented herein, was derived from the
audited consolidated balance sheet of the Company, but does not
include all disclosures required by accounting principles generally
accepted in the United States of America. These unaudited
consolidated financial statements should be read in conjunction
with the consolidated financial statements and related notes
included in the Company&amp;#x2019;s Annual Report on Form&amp;#xA0;10-K for
the fiscal year ended December&amp;#xA0;31, 2012. The results of
operations for the three months ended March&amp;#xA0;31, 2013 are not
necessarily indicative of the results to be expected for the full
year.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The
U.S.&amp;#xA0;dollar is the functional currency for all of the
Company&amp;#x2019;s operations except for its Canadian operations,
which uses the Canadian dollar as its functional currency. The
effects of exchange rate changes are reflected in accumulated other
comprehensive income, which is a separate component of
stockholders&amp;#x2019; equity.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The carrying
values of cash and cash equivalents, trade receivables and accounts
payable approximate fair value.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The Company
provides a dual presentation of its net income per common share in
its unaudited consolidated statements of operations: Basic net
income per common share (&amp;#x201C;Basic EPS&amp;#x201D;) and diluted net
income per common share (&amp;#x201C;Diluted EPS&amp;#x201D;).&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Basic EPS
excludes dilution and is computed by first allocating earnings
between common stockholders and holders of non-vested shares of
restricted stock. Basic EPS is then determined by dividing the
earnings attributable to common stockholders by the weighted
average number of common shares outstanding during the period,
excluding non-vested shares of restricted stock.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Diluted EPS is
based on the weighted average number of common shares outstanding
plus the dilutive effect of potential common shares, including
stock options, non-vested shares of restricted stock and restricted
stock units. The dilutive effect of stock options and restricted
stock units is determined using the treasury stock method. The
dilutive effect of non-vested shares of restricted stock is based
on the more dilutive of the treasury stock method or the two-class
method, assuming a reallocation of undistributed earnings to common
stockholders after considering the dilutive effect of potential
common shares other than non-vested shares of restricted
stock.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px; FONT-SIZE: 1px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The following
table presents information necessary to calculate net income per
share for the three months ended March&amp;#xA0;31, 2013 and 2012 as
well as potentially dilutive securities excluded from the weighted
average number of diluted common shares outstanding because their
inclusion would have been anti-dilutive (in thousands, except per
share amounts):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="78%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="6%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="6%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="6" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Three Months
Ended&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;March&amp;#xA0;31,&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;BASIC
EPS:&lt;/b&gt;&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Net income&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;56,230&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;97,274&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Adjust for income
attributed to holders of non-vested restricted stock&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(482&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(742&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Income attributed to common
stockholders&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;55,748&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;96,532&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Weighted average number of
common shares outstanding, excluding non-vested shares of
restricted stock&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;144,827&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;154,625&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Basic net income per common
share&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.38&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.62&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;DILUTED
EPS:&lt;/b&gt;&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Income attributed to common
stockholders&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;55,748&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;96,532&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Add incremental earnings
related to potential common shares&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;6&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Adjusted income attributed
to common stockholders&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;55,754&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;96,532&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Weighted average number of
common shares outstanding, excluding non-vested shares of
restricted stock&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;144,827&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;154,625&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Add dilutive effect of
potential common shares&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1,956&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;776&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Weighted average number of
diluted common shares outstanding&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;146,783&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;155,401&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Diluted net income per
common share&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.38&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.62&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Potentially dilutive
securities excluded as anti-dilutive&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1,874&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;3,229&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock>
  <us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_A14AEA38-2AEF-42DC-A509-4143DD807E75_1_0">&lt;div&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Weighted-average assumptions used to estimate the grant date
fair values for stock options granted for the three month periods
ended March&amp;#xA0;31, 2013 and 2012 follow:&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="84%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="6" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Three&amp;#xA0;Months&amp;#xA0;Ended&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;March&amp;#xA0;
31,&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Volatility&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;46.19&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;%&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;48.72&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;%&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Expected term (in
years)&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5.00&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5.00&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Dividend yield&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1.07&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;%&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1.00&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;%&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Risk-free interest
rate&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.72&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;%&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.83&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;%&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock>
  <us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_EDC382BB-74B2-41BB-A836-B1E17EBC9821_1_0">&lt;div&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr&gt;
&lt;td valign="top" width="4%" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;2.&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Stock-based
Compensation&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;!-- xbrl,body --&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The Company
uses share-based payments to compensate employees and non-employee
directors. The Company recognizes the cost of share-based payments
under the fair-value-based method. Share-based awards consist of
equity instruments in the form of stock options, restricted stock
or restricted stock units and have included service and, in certain
cases, performance conditions. The Company&amp;#x2019;s share-based
awards have also included both cash-settled and share-settled
performance unit awards. Cash-settled performance unit awards are
accounted for as liability awards. Share-settled performance unit
awards are accounted for as equity awards. The Company issues
shares of common stock when vested stock options are exercised,
when restricted stock is granted and when restricted stock units
and share-settled performance unit awards vest.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&gt;Stock
Options.&lt;/i&gt;&amp;#xA0;The Company estimates the grant date fair values
of stock options using the Black-Scholes-Merton valuation model.
Volatility assumptions are based on the historic volatility of the
Company&amp;#x2019;s common stock over the most recent period equal to
the expected term of the options as of the date the options are
granted. The expected term assumptions are based on the
Company&amp;#x2019;s experience with respect to employee stock option
activity. Dividend yield assumptions are based on the expected
dividends at the time the options are granted. The risk-free
interest rate assumptions are determined by reference to United
States Treasury yields. Weighted-average assumptions used to
estimate the grant date fair values for stock options granted for
the three month periods ended March&amp;#xA0;31, 2013 and 2012
follow:&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;!-- Begin Table Head --&gt;
&lt;tr&gt;
&lt;td width="84%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="6" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Three&amp;#xA0;Months&amp;#xA0;Ended&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;March&amp;#xA0;
31,&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2013&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Head --&gt;&lt;!-- Begin Table Body --&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Volatility&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;46.19&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;%&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;48.72&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;%&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Expected term (in
years)&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5.00&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5.00&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Dividend yield&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1.07&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;%&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1.00&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;%&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Risk-free interest
rate&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.72&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;%&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.83&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;%&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Body --&gt;&lt;/table&gt;
&lt;p style="MARGIN-TOP: 18px; MARGIN-BOTTOM: 0px; FONT-SIZE: 1px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Stock option
activity from January&amp;#xA0;1, 2013 to March&amp;#xA0;31, 2013
follows:&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;!-- Begin Table Head --&gt;
&lt;tr&gt;
&lt;td width="76%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Underlying&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Shares&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Weighted&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Average&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Exercise&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Price&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Head --&gt;&lt;!-- Begin Table Body --&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Outstanding at
January&amp;#xA0;1, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;7,827,195&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;20.35&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Granted&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;60,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;18.63&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Exercised&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(1,150,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;16.19&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Cancelled&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Expired&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Outstanding at
March&amp;#xA0;31, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;6,737,195&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;21.04&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Exercisable at
March&amp;#xA0;31, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,738,036&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;21.49&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Body --&gt;&lt;/table&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&gt;Restricted
Stock.&lt;/i&gt;&amp;#xA0;For all restricted stock awards to date, shares of
common stock were issued when the awards were made. Non-vested
shares are subject to forfeiture for failure to fulfill service
conditions and, in certain cases, performance conditions.
Non-forfeitable dividends are paid on non-vested shares of
restricted stock. The Company uses the straight-line method to
recognize periodic compensation cost over the vesting
period.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Restricted
stock activity from January&amp;#xA0;1, 2013 to March&amp;#xA0;31, 2013
follows:&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;!-- Begin Table Head --&gt;
&lt;tr&gt;
&lt;td width="76%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Shares&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Weighted&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Average&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Grant&amp;#xA0;Date&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Fair&amp;#xA0;Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Head --&gt;&lt;!-- Begin Table Body --&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Non-vested restricted stock
outstanding at January&amp;#xA0;1, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1,279,146&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;20.03&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Granted&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;18,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;18.63&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Vested&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(56,668&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;22.20&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Forfeited&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;(15,570&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;)&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;19.68&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Non-vested restricted stock
outstanding at March 31, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;1,224,908&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;19.92&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Body --&gt;&lt;/table&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&gt;Restricted
Stock Units.&lt;/i&gt;&amp;#xA0;For all restricted stock unit awards made to
date, shares of common stock are not issued until the units vest.
Restricted stock units are subject to forfeiture for failure to
fulfill service conditions. Non-forfeitable cash dividend
equivalents are paid on non-vested restricted stock units. The
Company uses the straight-line method to recognize periodic
compensation cost over the vesting period.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Restricted
stock unit activity from January&amp;#xA0;1, 2013 to March&amp;#xA0;31,
2013 follows:&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;!-- Begin Table Head --&gt;
&lt;tr&gt;
&lt;td width="79%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Shares&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Weighted&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Average&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Grant&amp;#xA0;Date&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Fair&amp;#xA0;Value&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Head --&gt;&lt;!-- Begin Table Body --&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Non-vested restricted stock
units outstanding at January&amp;#xA0;1, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;17,670&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;20.08&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Granted&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Vested&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Forfeited&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#x2014;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Non-vested restricted stock
units outstanding at March 31, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;17,670&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;20.08&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Body --&gt;&lt;/table&gt;
&lt;p style="PADDING-BOTTOM: 0px; MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&gt;Performance
Unit Awards.&lt;/i&gt; In 2010, 2011 and 2012, the Company granted
stock-settled performance unit awards to certain executive officers
(the &amp;#x201C;Stock-Settled Performance Units&amp;#x201D;). The
Stock-Settled Performance Units provide for the recipients to
receive a grant of shares of stock upon the achievement of certain
performance goals established by the Compensation Committee during
the performance period. The performance period for the
Stock-Settled Performance Units is the three year period commencing
on April&amp;#xA0;1 of the year of grant, but can extend for an
additional two years in certain circumstances. The performance
goals for the Stock-Settled Performance Units are tied to the
Company&amp;#x2019;s total shareholder return for the performance period
as compared to total shareholder return for a peer group determined
by the Compensation Committee. These goals are considered to be
market conditions under the relevant accounting standards and the
market conditions were factored into the determination of the fair
value of the performance units. Generally, the recipients will
receive a target number of shares if the Company&amp;#x2019;s total
shareholder return is positive and, when compared to the peer
group, is at the 50&lt;/font&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;th&lt;/sup&gt;&lt;/font&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;percentile and
two times the target if at the 75&lt;/font&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;th&lt;/sup&gt;&lt;/font&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;percentile or
higher. If the Company&amp;#x2019;s total shareholder return is
positive, and, when compared to the peer group, is at the
25&lt;/font&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;th&lt;/sup&gt;&lt;/font&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;percentile, the
recipients will only receive one-half of the target number of
shares. The grant of shares when achievement is between the
25&lt;/font&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;th&lt;/sup&gt;&lt;/font&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;and
75&lt;/font&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;th&lt;/sup&gt;&lt;/font&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;percentile will
be determined on a pro-rata basis. The target number of shares with
respect to the 2010 Stock-Settled Performance Units was 178,750.
The performance period for the 2010 Stock-Settled Performance Units
ended on March&amp;#xA0;31, 2013 and the Company&amp;#x2019;s total
shareholder return was at the 93&lt;/font&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;rd&lt;/sup&gt;&lt;/font&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;percentile. In
April 2013, 357,500 shares were issued to settle the 2010
Stock-Settled Performance Units.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The total
target number of shares with respect to the Stock-Settled
Performance Units is set forth below:&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="84%" align="center"&gt;
&lt;!-- Begin Table Head --&gt;
&lt;tr&gt;
&lt;td width="64%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2011&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2010&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Head --&gt;&lt;!-- Begin Table Body --&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Target number of
shares&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;192,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;144,375&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;178,750&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Body --&gt;&lt;/table&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Because the
Stock-Settled Performance Units are stock-settled awards, they are
accounted for as equity awards and measured at fair value on the
date of grant using a Monte Carlo simulation model. The fair value
of the Stock-Settled Performance Units is set forth below (in
thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="84%" align="center"&gt;
&lt;!-- Begin Table Head --&gt;
&lt;tr&gt;
&lt;td width="64%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="8%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="8%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="8%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2011&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2010&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Head --&gt;&lt;!-- Begin Table Body --&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Fair value at date of
grant&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;3,065&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,569&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;3,117&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Body --&gt;&lt;/table&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;These fair
value amounts are charged to expense on a straight-line basis over
the performance period. Compensation expense associated with the
Stock-Settled Performance Units is shown below (in
thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="84%" align="center"&gt;
&lt;!-- Begin Table Head --&gt;
&lt;tr&gt;
&lt;td width="64%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="9%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="9%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="9%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2011&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2010&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Head --&gt;&lt;!-- Begin Table Body --&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Three months ended
March&amp;#xA0;31, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;255&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;464&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;260&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Three months ended
March&amp;#xA0;31, 2012&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;NA&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;464&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;260&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Body --&gt;&lt;/table&gt;
&lt;/div&gt;</us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock>
  <us-gaap:PaymentsOfDividends contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_23" unitRef="iso4217_USD">7312000</us-gaap:PaymentsOfDividends>
  <us-gaap:GoodwillPeriodIncreaseDecrease contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_C429EBF2-289B-424D-B3FD-177D3C4C6C1F_5003_2" unitRef="iso4217_USD" xsi:nil="true"/>
  <us-gaap:LongTermDebtTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_F1749489-B6EE-4094-94C2-5A7F8AE19AEC_1_0">&lt;div&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr&gt;
&lt;td valign="top" width="4%" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;8.&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Long Term
Debt&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;!-- xbrl,body --&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&gt;Credit
Facilities -&lt;/i&gt; On September&amp;#xA0;27, 2012, the Company entered
into a Credit Agreement (the &amp;#x201C;Credit Agreement&amp;#x201D;) with
Wells Fargo Bank, N.A., as administrative agent, letter of credit
issuer, swing line lender and lender, and each of the other lenders
party thereto. The Credit Agreement is a committed senior unsecured
credit facility that includes a revolving credit facility and a
term loan facility.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The revolving
credit facility permits aggregate borrowings of up to $500 million
outstanding at any time. The revolving credit facility contains a
letter of credit facility that is limited to $150 million and a
swing line facility that is limited to $40 million, in each case
outstanding at any time.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The term loan
facility provides for a loan of $100 million, which was drawn on
December&amp;#xA0;24, 2012. The term loan facility is payable in
quarterly principal installments which
commenced&amp;#xA0;December&amp;#xA0;27, 2012. The installment amounts vary
from 1.25% of the original principal amount for each of the first
four quarterly installments, 2.50% of the original principal amount
for each of the subsequent eight quarterly installments, 5.00% of
the original principal amount for the subsequent four quarterly
installments and 13.75% of the original principal amount for the
final four quarterly installments.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Subject to
customary conditions, the Company may request that the
lenders&amp;#x2019; aggregate commitments with respect to the revolving
credit facility and/or the term loan facility be increased by up to
$100 million, not to exceed total commitments of $700 million. The
maturity date under the Credit Agreement is September&amp;#xA0;27, 2017
for both the revolving facility and the term facility.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px; FONT-SIZE: 1px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Loans under the
Credit Agreement bear interest by reference, at the Company&amp;#x2019;s
election, to the LIBOR rate or base rate, provided, that swing line
loans bear interest by reference only to the base rate. The
applicable margin on LIBOR rate loans varies from 2.25% to 3.25%
and the applicable margin on base rate loans varies from 1.25% to
2.25%, in each case determined based upon the Company&amp;#x2019;s debt
to capitalization ratio. As of March&amp;#xA0;31, 2013, the applicable
margin on LIBOR rate loans was 2.25% and the applicable margin on
base rate loans was 1.25%. A letter of credit fee is payable by the
Company equal to the applicable margin for LIBOR rate loans times
the daily amount available to be drawn under outstanding letters of
credit. The commitment fee rate payable to the lenders for the
unused portion of the credit facility is 0.50%.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Each domestic
subsidiary of the Company other than immaterial subsidiaries has
unconditionally guaranteed all existing and future indebtedness and
liabilities of the other guarantors and the Company arising under
the Credit Agreement and other loan documents. Such guarantees also
cover obligations of the Company and any subsidiary of the Company
arising under any interest rate swap contract with any person while
such person is a lender under the Credit Agreement.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The Credit
Agreement requires compliance with two financial covenants. The
Company must not permit its debt to capitalization ratio to exceed
45%. The Credit Agreement generally defines the debt to
capitalization ratio as the ratio of (a)&amp;#xA0;total borrowed money
indebtedness to (b)&amp;#xA0;the sum of such indebtedness plus
consolidated net worth, with consolidated net worth determined as
of the last day of the most recently ended fiscal quarter. The
Company also must not permit the interest coverage ratio as of the
last day of a fiscal quarter to be less than 3.00 to 1.00. The
Credit Agreement generally defines the interest coverage ratio as
the ratio of earnings before interest, taxes, depreciation and
amortization (&amp;#x201C;EBITDA&amp;#x201D;) of the four prior fiscal
quarters to interest charges for the same period. The Company was
in compliance with these covenants at March&amp;#xA0;31, 2013. The
Credit Agreement also contains customary representations,
warranties and affirmative and negative covenants.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Events of
default under the Credit Agreement include failure to pay principal
or interest when due, failure to comply with the financial and
operational covenants, as well as a cross default event, loan
document enforceability event, change of control event and
bankruptcy and other insolvency events. If an event of default
occurs and is continuing, then a majority of the lenders have the
right, among others, to (i)&amp;#xA0;terminate the commitments under
the Credit Agreement, (ii)&amp;#xA0;accelerate and require the Company
to repay all the outstanding amounts owed under any loan document
(provided that in limited circumstances with respect to insolvency
and bankruptcy of the Company, such acceleration is automatic), and
(iii)&amp;#xA0;require the Company to cash collateralize any
outstanding letters of credit.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;As of
March&amp;#xA0;31, 2013, the Company had $97.5 million principal amount
outstanding under the term loan facility at an interest rate of
2.625% and no amounts outstanding under the revolving credit
facility. The Company had $39.8 million in letters of credit
outstanding at March&amp;#xA0;31, 2013 and, as a result, had available
borrowing capacity of approximately $460 million at that
date.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;i&gt;Senior Notes
&amp;#x2013;&lt;/i&gt; On October&amp;#xA0;5, 2010, the Company completed the
issuance and sale of $300 million in aggregate principal amount of
its 4.97% Series A Senior Notes due October&amp;#xA0;5, 2020 (the
&amp;#x201C;Series A Notes&amp;#x201D;) in a private placement. The Series A
Notes bear interest at a rate of 4.97%&amp;#xA0;per annum. The Company
will pay interest on the Series A Notes on April&amp;#xA0;5 and
October&amp;#xA0;5 of each year. The Series A Notes will mature on
October&amp;#xA0;5, 2020.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;On
June&amp;#xA0;14, 2012, the Company completed the issuance and sale of
$300 million in aggregate principal amount of its 4.27% Series B
Senior Notes due June&amp;#xA0;14, 2022 (the &amp;#x201C;Series B
Notes&amp;#x201D;) in a private placement. The Series B Notes bear
interest at a rate of 4.27%&amp;#xA0;per annum. The Company will pay
interest on the Series B Notes on April&amp;#xA0;5 and October&amp;#xA0;5
of each year. The Series B Notes will mature on June&amp;#xA0;14,
2022.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The Series A
Notes and Series B Notes are senior unsecured obligations of the
Company which rank equally in right of payment with all other
unsubordinated indebtedness of the Company. The Series A Notes and
Series B Notes are guaranteed on a senior unsecured basis by each
of the existing domestic subsidiaries of the Company other than
immaterial subsidiaries.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The Series A
Notes and Series B Notes are prepayable at the Company&amp;#x2019;s
option, in whole or in part, provided that in the case of a partial
prepayment, prepayment must be in an amount not less than 5% of the
aggregate principal amount of the notes then outstanding, at any
time and from time to time at 100% of the principal amount prepaid,
plus accrued and unpaid interest to the prepayment date, plus a
&amp;#x201C;make-whole&amp;#x201D; premium as specified in the note purchase
agreements. The Company must offer to prepay the notes upon the
occurrence of any change of control. In addition, the Company must
offer to prepay the notes upon the occurrence of certain asset
dispositions if the proceeds therefrom are not timely reinvested in
productive assets. If any offer to prepay is accepted, the purchase
price of each prepaid note is 100% of the principal amount thereof,
plus accrued and unpaid interest thereon to the prepayment
date.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px; FONT-SIZE: 1px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The respective
note purchase agreements require compliance with two financial
covenants. The Company must not permit its debt to capitalization
ratio to exceed 50% at any time. The note purchase agreements
generally define the debt to capitalization ratio as the ratio of
(a)&amp;#xA0;total borrowed money indebtedness to (b)&amp;#xA0;the sum of
such indebtedness plus consolidated net worth, with consolidated
net worth determined as of the last day of the most recently ended
fiscal quarter. The Company also must not permit the interest
coverage ratio as of the last day of a fiscal quarter to be less
than 2.50 to 1.00. The note purchase agreements generally define
the interest coverage ratio as the ratio of EBITDA for the four
prior fiscal quarters to interest charges for that same period. The
Company was in compliance with these covenants at March&amp;#xA0;31,
2013.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Events of
default under the note purchase agreements include failure to pay
principal or interest when due, failure to comply with the
financial and operational covenants, a cross default event, a
judgment in excess of a threshold event, the guaranty agreement
ceasing to be enforceable, the occurrence of certain ERISA events,
a change of control event and bankruptcy and other insolvency
events. If an event of default under the note purchase agreements
occurs and is continuing, then holders of a majority in principal
amount of the respective notes have the right to declare all the
notes then-outstanding to be immediately due and payable. In
addition, if the Company defaults in payments on any note, then
until such defaults are cured, the holder thereof may declare all
the notes held by it pursuant to the note purchase agreement to be
immediately due and payable.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The Company
incurred approximately $10.8 million in debt issuance costs during
2010 in connection with the previous credit agreement and the
Series A Notes. During the third quarter of 2012, $978,000 of these
costs were&amp;#xA0;charged to interest expense due to the early
termination of the previous credit agreement. The Company incurred
approximately $7.6 million in debt issuance costs during 2012 in
connection with the Series B Notes and the Credit Agreement. These
costs were deferred and are recognized as interest expense over the
term of the underlying debt. Interest expense related to the
amortization of debt issuance costs was approximately $547,000 and
$604,000 for the three months ended March&amp;#xA0;31, 2013 and
2012.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Presented below
is a schedule of the principal repayment requirements of long-term
debt by fiscal year as of March&amp;#xA0;31, 2013 (in
thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="68%" align="center"&gt;
&lt;!-- Begin Table Head --&gt;
&lt;tr&gt;
&lt;td width="87%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="5%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Head --&gt;&lt;!-- Begin Table Body --&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Year ending
December&amp;#xA0;31,&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;2014&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;10,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;2015&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;12,500&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;2016&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;28,750&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;2017&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;41,250&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Thereafter&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;600,000&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 1px solid"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Total&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;697,500&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="FONT-SIZE: 1px"&gt;
&lt;td valign="bottom"&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&amp;#xA0;&amp;#xA0;&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;
&lt;p style="BORDER-TOP: #000000 3px double"&gt;&amp;#xA0;&lt;/p&gt;
&lt;/td&gt;
&lt;td&gt;&amp;#xA0;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Body --&gt;&lt;/table&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 18px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;!-- xbrl,n --&gt;&lt;/div&gt;</us-gaap:LongTermDebtTextBlock>
  <us-gaap:NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_36FE00AF-6E55-4DEA-B83E-E5F777A3CA9D_1_0">&lt;div&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr&gt;
&lt;td valign="top" width="4%" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;13.&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="top" align="left"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&lt;b&gt;Recently Issued
Accounting Standards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;In February
2013, the FASB issued an accounting standards update that requires
additional disclosures regarding reclassifications out of
accumulated other comprehensive income. This requirement is
effective for fiscal years, and interim periods within those years,
beginning after December&amp;#xA0;15, 2012, and became effective for
the Company in the quarter ended March&amp;#xA0;31, 2013. The adoption
of this update did not have a material impact on the
Company&amp;#x2019;s disclosures included in its consolidated financial
statements.The Company includes in accumulated other comprehensive
income the cumulative translation adjustment of its foreign
subsidiary.&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;In February
2013, the FASB issued an accounting standards update to provide
guidance for the recognition, measurement, and disclosure of
obligations resulting from joint and several liability arrangements
for which the total amount of the obligation within the scope of
the update is fixed at the reporting date, except for obligations
addressed within existing guidance in U.S. GAAP. The guidance
requires an entity to measure those obligations as the sum of the
amount the reporting entity agreed to pay on the basis of its
arrangement among its co-obligors and any additional amount the
reporting entity expects to pay on behalf of its co-obligors. The
update also requires an entity to disclose the nature and amount of
the obligation as well as other information about those
obligations. The requirements in this update are effective during
interim and annual periods beginning after December&amp;#xA0;15, 2013.
The adoption of this update is not expected to have a material
impact on the Company&amp;#x2019;s consolidated financial
statements.&lt;/font&gt;&lt;/p&gt;
&lt;/div&gt;</us-gaap:NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock>
  <us-gaap:IncreaseDecreaseInAccruedLiabilities contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_14" unitRef="iso4217_USD">-17698000</us-gaap:IncreaseDecreaseInAccruedLiabilities>
  <us-gaap:InterestExpense contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_17" unitRef="iso4217_USD">6766000</us-gaap:InterestExpense>
  <us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_FBAE3D4B-863F-4443-8901-DCB18CB38934_1_9" unitRef="iso4217_USD">55754000</us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted>
  <pten:ContractDrillingExpenses contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_6" unitRef="iso4217_USD">247072000</pten:ContractDrillingExpenses>
  <pten:IncomeLossFromContinuingOperationsAllocableToNonVestedRestrictedShares contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_FBAE3D4B-863F-4443-8901-DCB18CB38934_1_2" unitRef="iso4217_USD">-482000</pten:IncomeLossFromContinuingOperationsAllocableToNonVestedRestrictedShares>
  <pten:AssetRetirementObligationAccretionExpenseAccrued contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_4760AA18-3DBF-4E66-892B-DE441A7B8F68_1_3" unitRef="iso4217_USD">41000</pten:AssetRetirementObligationAccretionExpenseAccrued>
  <pten:IncrementalIncomeLossRelatedToPotentialCommonShares contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_FBAE3D4B-863F-4443-8901-DCB18CB38934_1_8" unitRef="iso4217_USD">6000</pten:IncrementalIncomeLossRelatedToPotentialCommonShares>
  <pten:PressurePumpingOperatingCost contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_7" unitRef="iso4217_USD">168156000</pten:PressurePumpingOperatingCost>
  <pten:IncreaseDecreaseInIncomeTaxesReceivableAndPayable contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_11" unitRef="iso4217_USD">-1267000</pten:IncreaseDecreaseInIncomeTaxesReceivableAndPayable>
  <pten:IncreaseDecreaseInInventoryAndOtherAssets contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_12" unitRef="iso4217_USD">-6672000</pten:IncreaseDecreaseInInventoryAndOtherAssets>
  <pten:NetDecreaseIncreaseInDepositsOnEquipmentPurchases contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_445FE248-CF9A-41CF-9DFC-52048C945F68_1_41" unitRef="iso4217_USD">7863000</pten:NetDecreaseIncreaseInDepositsOnEquipmentPurchases>
  <pten:DepreciationDepletionAmortizationAndImpairment contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="-3" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_9" unitRef="iso4217_USD">136435000</pten:DepreciationDepletionAmortizationAndImpairment>
  <pten:ShareBasedCompensationExpenseByAwardTypeTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_361FADEB-C749-4151-A0AE-F08D7CE74C6B_1_0">&lt;div&gt;
&lt;p&gt;&lt;font size="2"&gt;Compensation expense associated with the
Stock-Settled Performance Units is shown below (in
thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="84%" align="center"&gt;
&lt;!-- Begin Table Head --&gt;
&lt;tr&gt;
&lt;td width="64%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="9%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="9%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="9%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2011&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2010&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Head --&gt;&lt;!-- Begin Table Body --&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Three months ended
March&amp;#xA0;31, 2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;255&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;464&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;260&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Three months ended
March&amp;#xA0;31, 2012&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;NA&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;464&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;260&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;!-- End Table Body --&gt;&lt;/table&gt;
&lt;/div&gt;</pten:ShareBasedCompensationExpenseByAwardTypeTextBlock>
  <pten:DividendActivityTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_7CDCA5A2-489A-42BA-B448-EB42119B7C59_1_0">&lt;div&gt;
&lt;p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The Company
paid cash dividends during the three months ended March&amp;#xA0;31,
2012 and 2013 as follows:&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="76%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="8%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="8%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012:&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Per&amp;#xA0;Share&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" colspan="2"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;(in&amp;#xA0;thousands)&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Paid on March&amp;#xA0;30,
2012&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.05&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;7,788&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"&gt;
&lt;tr&gt;
&lt;td width="76%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="8%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="8%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2013:&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Per&amp;#xA0;Share&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" colspan="2"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;(in&amp;#xA0;thousands)&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Paid on March&amp;#xA0;29,
2013&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;0.05&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;7,312&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</pten:DividendActivityTextBlock>
  <pten:CommonStockDividendsPerShareDeclaredAndPaid contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" decimals="2" id="id_1446237_C2CE7D33-11BC-478E-94A5-F01D76C44033_1_32" unitRef="iso4217_USD_per_shares">0.05</pten:CommonStockDividendsPerShareDeclaredAndPaid>
  <pten:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueTableTextBlock contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0" id="id_1446237_5539939F-AB24-48DA-98AC-CD4C10DE1047_1_0">&lt;div&gt;
&lt;p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;The fair value
of the Stock-Settled Performance Units is set forth below (in
thousands):&lt;/font&gt;&lt;/p&gt;
&lt;p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px"&gt;
&amp;#xA0;&lt;/p&gt;
&lt;table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="84%" align="center"&gt;
&lt;tr&gt;
&lt;td width="64%"&gt;&lt;/td&gt;
&lt;td valign="bottom" width="8%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="8%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td valign="bottom" width="8%"&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;td&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2012&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2011&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;2010&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Performance&lt;/b&gt;&lt;/font&gt;&lt;br /&gt;
&lt;font style="FONT-FAMILY: Times New Roman" size="1"&gt;&lt;b&gt;Unit
Awards&lt;/b&gt;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr bgcolor="#CCEEFF"&gt;
&lt;td valign="top"&gt;
&lt;p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;Fair value at date of
grant&lt;/font&gt;&lt;/p&gt;
&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;3,065&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;5,569&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font size="1"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;$&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" align="right"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;3,117&lt;/font&gt;&lt;/td&gt;
&lt;td valign="bottom" nowrap="nowrap"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;&amp;#xA0;&amp;#xA0;&lt;/font&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;</pten:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueTableTextBlock>
  <us-gaap:OperatingIncomeLoss contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0_500291x503689" decimals="-3" id="id_1446237_A73C0411-E0F6-4C79-8631-4B80DAA82731_1001_4" unitRef="iso4217_USD">107305000</us-gaap:OperatingIncomeLoss>
  <us-gaap:SalesRevenueNet contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0_500291x503689" decimals="-3" id="id_1446237_EFA14816-4B71-43EC-A4C3-C5E7D5DC09FC_1001_4" unitRef="iso4217_USD">668178000</us-gaap:SalesRevenueNet>
  <us-gaap:OilAndGasSalesRevenue contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0_500291x503689" decimals="-3" id="id_1446237_EFA14816-4B71-43EC-A4C3-C5E7D5DC09FC_1001_3" unitRef="iso4217_USD">16785000</us-gaap:OilAndGasSalesRevenue>
  <us-gaap:OperatingIncomeLoss contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0_500291x503689_530504x532151" decimals="-3" id="id_1446237_A73C0411-E0F6-4C79-8631-4B80DAA82731_2001_1" unitRef="iso4217_USD">72549000</us-gaap:OperatingIncomeLoss>
  <us-gaap:RevenueOilAndGasServices contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0_500291x503689_530504x532151" decimals="-3" id="id_1446237_EFA14816-4B71-43EC-A4C3-C5E7D5DC09FC_2001_1" unitRef="iso4217_USD">420233000</us-gaap:RevenueOilAndGasServices>
  <us-gaap:OperatingIncomeLoss contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0_500291x503689_530504x532152" decimals="-3" id="id_1446237_A73C0411-E0F6-4C79-8631-4B80DAA82731_3001_2" unitRef="iso4217_USD">28515000</us-gaap:OperatingIncomeLoss>
  <us-gaap:RevenueOilAndGasServices contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0_500291x503689_530504x532152" decimals="-3" id="id_1446237_EFA14816-4B71-43EC-A4C3-C5E7D5DC09FC_3001_2" unitRef="iso4217_USD">231160000</us-gaap:RevenueOilAndGasServices>
  <us-gaap:OperatingIncomeLoss contextRef="eol_PE7031----1310-Q0002_STD_90_20130331_0_500291x503689_530504x532153" decimals="-3" id="id_1446237_A73C0411-E0F6-4C79-8631-4B80DAA82731_4001_3" unitRef="iso4217_USD">6241000</us-gaap:OperatingIncomeLoss>
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        <link:definition>132 - Disclosure - Stockholders' Equity (Tables)</link:definition>
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        <link:definition>137 - Disclosure - Restricted Stock Activity (Detail)</link:definition>
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        <link:definition>138 - Disclosure - Restricted Stock Unit Activity (Detail)</link:definition>
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        <link:definition>139 - Disclosure - Stock-based Compensation - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>140 - Disclosure - Stock-Settled Performance Units (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>141 - Disclosure - Fair Value of Stock Settled Performance Units (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>142 - Disclosure - Compensation Expense Associated with Stock-Settled Performance Units (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.patenergy.com/taxonomy/role/DisclosurePropertyAndEquipment" id="DisclosurePropertyAndEquipment">
        <link:definition>143 - Disclosure - Property and Equipment (Detail)</link:definition>
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        <link:definition>146 - Disclosure - Business Segments - Income (loss) from Continuing Operations Before Income Taxes (Detail)</link:definition>
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        <link:definition>149 - Disclosure - Goodwill and Intangible Assets - Additional Information (Detail)</link:definition>
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        <link:definition>152 - Disclosure - Accrued Expenses - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>153 - Disclosure - Changes to Company's Asset Retirement Obligations (Detail)</link:definition>
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        <link:definition>154 - Disclosure - Long Term Debt - Additional Information (Detail)</link:definition>
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        <link:definition>155 - Disclosure - Schedule of Principal Repayment Requirements of Long Term Debt (Detail)</link:definition>
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        <link:definition>156 - Disclosure - Commitments, Contingencies and Other Matters - Additional Information (Detail)</link:definition>
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      <link:roleType roleURI="http://www.patenergy.com/taxonomy/role/DisclosureCashDividends" id="DisclosureCashDividends">
        <link:definition>157 - Disclosure - Cash Dividends (Detail)</link:definition>
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      <link:roleType roleURI="http://www.patenergy.com/taxonomy/role/DisclosureStockholdersEquityAdditionalInformation" id="DisclosureStockholdersEquityAdditionalInformation">
        <link:definition>158 - Disclosure - Stockholders' Equity - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.patenergy.com/taxonomy/role/DisclosureIncomeTaxesAdditionalInformation" id="DisclosureIncomeTaxesAdditionalInformation">
        <link:definition>159 - Disclosure - Income Taxes - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>160 - Disclosure - Estimated Fair Value of Outstanding Debt Balances (Detail)</link:definition>
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        <link:definition>161 - Disclosure - Fair Values of Financial Instruments - Additional Information (Detail)</link:definition>
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  <element name="GroupTwoMember" id="pten_GroupTwoMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="IncomeLossFromContinuingOperationsAllocableToNonVestedRestrictedShares" id="pten_IncomeLossFromContinuingOperationsAllocableToNonVestedRestrictedShares" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="IncomeTaxesTable" id="pten_IncomeTaxesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="IncreaseDecreaseInIncomeTaxesReceivableAndPayable" id="pten_IncreaseDecreaseInIncomeTaxesReceivableAndPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="IncreaseDecreaseInInventoryAndOtherAssets" id="pten_IncreaseDecreaseInInventoryAndOtherAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="IncrementalIncomeLossRelatedToPotentialCommonShares" id="pten_IncrementalIncomeLossRelatedToPotentialCommonShares" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="InterestCoverageRatio" id="pten_InterestCoverageRatio" type="xbrli:decimalItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="InterestExpenseNet" id="pten_InterestExpenseNet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="LondonInterbankOfferedRateMember" id="pten_LondonInterbankOfferedRateMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems" id="pten_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="OilAndNaturalGasMember" id="pten_OilAndNaturalGasMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="ScheduleOfAccruedLiabilitiesTable" id="pten_ScheduleOfAccruedLiabilitiesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems" id="pten_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassTable" id="pten_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
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  <element name="SegmentReportingDisclosureTable" id="pten_SegmentReportingDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
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  <element name="SemiAnnualPaymentSecondPaymentMember" id="pten_SemiAnnualPaymentSecondPaymentMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember" id="pten_SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="ShareBasedCompensationExpenseByAwardTypeTextBlock" id="pten_ShareBasedCompensationExpenseByAwardTypeTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="StockholdersEquityNoteLineItems" id="pten_StockholdersEquityNoteLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StockholdersEquityNoteTable" id="pten_StockholdersEquityNoteTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
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  <element name="TermLoanMember" id="pten_TermLoanMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="UnrecognizedShareBasedCompensationExpenseLineItems" id="pten_UnrecognizedShareBasedCompensationExpenseLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="UnrecognizedShareBasedCompensationExpenseTable" id="pten_UnrecognizedShareBasedCompensationExpenseTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
</schema>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.CAL
<SEQUENCE>7
<FILENAME>pten-20130331_cal.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION CALCULATION LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="US-ASCII"?>
<!-- RR Donnelley Xcelerate Taxonomy Calculation Linkbase, based on XBRL 2.1  http://www.edgar-online.com/ -->
<!-- Version: 6.20.1 -->
<!-- Round: 8 -->
<!-- Creation date: 2013-04-30T10:36:06Z -->
<!-- Copyright (c) 2005-2013 R.R. Donnelley & Sons Company All Rights Reserved. -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase"
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  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureCalculationOfBasicAndDilutedNetIncomePerShare" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureCalculationOfBasicAndDilutedNetIncomePerShare"/>
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<DOCUMENT>
<TYPE>EX-101.DEF
<SEQUENCE>8
<FILENAME>pten-20130331_def.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="US-ASCII"?>
<!-- RR Donnelley Xcelerate Taxonomy Definition Linkbase, based on XBRL 2.1  http://www.edgar-online.com/ -->
<!-- Version: 6.20.1 -->
<!-- Round: 8 -->
<!-- Creation date: 2013-04-30T10:36:07Z -->
<!-- Copyright (c) 2005-2013 R.R. Donnelley & Sons Company All Rights Reserved. -->
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</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>9
<FILENAME>pten-20130331_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="US-ASCII"?>
<!-- RR Donnelley Xcelerate Taxonomy Labels Linkbase, based on XBRL 2.1  http://www.edgar-online.com/ -->
<!-- Version: 6.20.1 -->
<!-- Round: 8 -->
<!-- Creation date: 2013-04-30T10:36:06Z -->
<!-- Copyright (c) 2005-2013 R.R. Donnelley & Sons Company All Rights Reserved. -->
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xml:lang="en-US" id="id_1446237_511240_1_1">Accrued Liabilities Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xml:lang="en-US" id="id_1446237_511240_2_1">Accrued expenses</label>
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    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_AccruedSalariesWagesPayrollTaxesAndBenefitsCurrent" xlink:label="pten_AccruedSalariesWagesPayrollTaxesAndBenefitsCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_AccruedSalariesWagesPayrollTaxesAndBenefitsCurrent_lbl" xml:lang="en-US" id="id_1446237_523997_3_1">Accrued Salaries, Wages, Payroll Taxes and Benefits, Current</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_1446237_513924_1_1">Accumulated Depreciation Depletion And Amortization Property Plant And Equipment</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_1446237_513924_8_1">Less accumulated depreciation and depletion</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xml:lang="en-US" id="id_1446237_510963_1_1">Accumulated Other Comprehensive Income Loss Net Of Tax</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xml:lang="en-US" id="id_1446237_500724_1_1">Accumulated Other Comprehensive Income [Member]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_lbl" xml:lang="en-US" id="id_1446237_507666_1_1">Acquired Finite Lived Intangible Assets [Line Items]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems" xlink:to="us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US" id="id_1446237_514143_1_1">Additional Paid In Capital</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US" id="id_1446237_514143_2_1">Additional paid-in capital</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="us-gaap_AdditionalPaidInCapitalMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xml:lang="en-US" id="id_1446237_508619_1_1">Additional Paid In Capital [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xml:lang="en-US" id="id_1446237_508619_2_1">Additional Paid-in Capital</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xml:lang="en-US" id="id_1446237_500272_1_1">Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xml:lang="en-US" id="id_1446237_500272_2_1">Stock-based compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US" id="id_1446237_502541_1_1">Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US" id="id_1446237_502541_2_1">Adjustments to reconcile net income to net cash provided by operating activities:</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet" xlink:label="us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet_lbl" xml:lang="en-US" id="id_1446237_507335_1_1">Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet_lbl" xml:lang="en-US" id="id_1446237_507335_2_1">Tax benefit related to stock-based compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet" xlink:to="us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_AdvancesToNonAffiliates" xlink:label="pten_AdvancesToNonAffiliates"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_AdvancesToNonAffiliates_lbl" xml:lang="en-US" id="id_1446237_527568_3_1">Advances to Non Affiliates</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_AdvancesToNonAffiliates_lbl" xml:lang="en-US" id="id_1446237_527568_2_1">Advance to non-affiliates</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense"/>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xml:lang="en-US" id="id_1446237_512302_1_1">Allowance For Doubtful Accounts Receivable Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xml:lang="en-US" id="id_1446237_512302_2_1">Accounts receivable, allowance for doubtful accounts</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:to="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_AmendmentFlag_lbl" xml:lang="en-US" id="id_1446237_497723_1_1">Amendment Flag</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_AmendmentFlag_lbl" xml:lang="en-US" id="id_1446237_497723_2_1">Amendment Flag</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xml:lang="en-US" id="id_1446237_505582_1_1">Amortization Of Financing Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xml:lang="en-US" id="id_1446237_505582_2_1">Interest expense related to amortization of debt issuance costs</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xml:lang="en-US" id="id_1446237_512699_2_1">Potentially dilutive securities excluded as anti-dilutive</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_ApplicableMarginRate" xlink:label="pten_ApplicableMarginRate"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_ApplicableMarginRate_lbl" xml:lang="en-US" id="id_1446237_540171_1_1">Applicable Margin Rate</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetRetirementObligation_lbl" xml:lang="en-US" id="id_1446237_514132_1_1">Asset Retirement Obligation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_AssetRetirementObligation_lbl" xml:lang="en-US" id="id_1446237_514132_4_1">Asset retirement obligation at end of period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_AssetRetirementObligation_lbl" xml:lang="en-US" id="id_1446237_514132_5_1">Balance at beginning of period</label>
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    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_AssetRetirementObligationAccretionExpenseAccrued" xlink:label="pten_AssetRetirementObligationAccretionExpenseAccrued"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_AssetRetirementObligationAccretionExpenseAccrued_lbl" xml:lang="en-US" id="id_1446237_523667_3_1">Asset Retirement Obligation, Accretion Expense Accrued</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_AssetRetirementObligationAccretionExpenseAccrued_lbl" xml:lang="en-US" id="id_1446237_523667_2_1">Accretion expense</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetRetirementObligationDisclosureAbstract" xlink:label="us-gaap_AssetRetirementObligationDisclosureAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetRetirementObligationDisclosureAbstract_lbl" xml:lang="en-US" id="id_1446237_501085_1_1">Asset Retirement Obligation Disclosure [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetRetirementObligationDisclosureAbstract_lbl" xml:lang="en-US" id="id_1446237_501085_2_1">Asset Retirement Obligation Disclosure [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetRetirementObligationDisclosureAbstract" xlink:to="us-gaap_AssetRetirementObligationDisclosureAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetRetirementObligationDisclosureTextBlock" xlink:label="us-gaap_AssetRetirementObligationDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetRetirementObligationDisclosureTextBlock_lbl" xml:lang="en-US" id="id_1446237_507559_1_1">Asset Retirement Obligation Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetRetirementObligationDisclosureTextBlock_lbl" xml:lang="en-US" id="id_1446237_507559_2_1">Asset Retirement Obligation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetRetirementObligationDisclosureTextBlock" xlink:to="us-gaap_AssetRetirementObligationDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetRetirementObligationLiabilitiesIncurred" xlink:label="us-gaap_AssetRetirementObligationLiabilitiesIncurred"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetRetirementObligationLiabilitiesIncurred_lbl" xml:lang="en-US" id="id_1446237_505645_1_1">Asset Retirement Obligation Liabilities Incurred</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetRetirementObligationLiabilitiesIncurred_lbl" xml:lang="en-US" id="id_1446237_505645_2_1">Liabilities incurred</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetRetirementObligationLiabilitiesIncurred" xlink:to="us-gaap_AssetRetirementObligationLiabilitiesIncurred_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetRetirementObligationLiabilitiesSettled" xlink:label="us-gaap_AssetRetirementObligationLiabilitiesSettled"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetRetirementObligationLiabilitiesSettled_lbl" xml:lang="en-US" id="id_1446237_512867_1_1">Asset Retirement Obligation Liabilities Settled</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_AssetRetirementObligationLiabilitiesSettled_lbl" xml:lang="en-US" id="id_1446237_512867_8_1">Liabilities settled</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetRetirementObligationLiabilitiesSettled" xlink:to="us-gaap_AssetRetirementObligationLiabilitiesSettled_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetRetirementObligationRevisionOfEstimate" xlink:label="us-gaap_AssetRetirementObligationRevisionOfEstimate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetRetirementObligationRevisionOfEstimate_lbl" xml:lang="en-US" id="id_1446237_512390_1_1">Asset Retirement Obligation Revision Of Estimate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetRetirementObligationRevisionOfEstimate_lbl" xml:lang="en-US" id="id_1446237_512390_2_1">Revision in estimated costs of plugging oil and natural gas wells</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetRetirementObligationRevisionOfEstimate" xlink:to="us-gaap_AssetRetirementObligationRevisionOfEstimate_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US" id="id_1446237_507639_1_1">Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US" id="id_1446237_507639_2_1">Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US" id="id_1446237_507639_6_1">Total assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsAbstract_lbl" xml:lang="en-US" id="id_1446237_498468_1_1">Assets [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsAbstract_lbl" xml:lang="en-US" id="id_1446237_498468_2_1">ASSETS</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrent_lbl" xml:lang="en-US" id="id_1446237_513098_1_1">Assets Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AssetsCurrent_lbl" xml:lang="en-US" id="id_1446237_513098_6_1">Total current assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_AssetsCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="us-gaap_AssetsCurrentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xml:lang="en-US" id="id_1446237_513511_1_1">Assets Current [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xml:lang="en-US" id="id_1446237_513511_2_1">Current assets:</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AwardTypeAxis_lbl" xml:lang="en-US" id="id_1446237_508454_1_1">Award Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AwardTypeAxis_lbl" xml:lang="en-US" id="id_1446237_508454_2_1">Schedule of Share-based Compensation Arrangement by Share-based Payment Award</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_AwardTypeAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_BaseRateMember" xlink:label="pten_BaseRateMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_BaseRateMember_lbl" xml:lang="en-US" id="id_1446237_532114_3_1">Base Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_BaseRateMember_lbl" xml:lang="en-US" id="id_1446237_532114_1_1">Base Rate [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_BaseRateMember_lbl" xml:lang="en-US" id="id_1446237_532114_2_1">Base Rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_BaseRateMember" xlink:to="pten_BaseRateMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BuildingsAndImprovementsGross" xlink:label="us-gaap_BuildingsAndImprovementsGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BuildingsAndImprovementsGross_lbl" xml:lang="en-US" id="id_1446237_498793_1_1">Buildings And Improvements Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BuildingsAndImprovementsGross_lbl" xml:lang="en-US" id="id_1446237_498793_2_1">Buildings</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BuildingsAndImprovementsGross" xlink:to="us-gaap_BuildingsAndImprovementsGross_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US" id="id_1446237_510062_1_1">Cash And Cash Equivalents At Carrying Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US" id="id_1446237_510062_4_1">Cash and cash equivalents at end of period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US" id="id_1446237_510062_5_1">Cash and cash equivalents at beginning of period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US" id="id_1446237_510062_2_1">Cash and cash equivalents</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl" xml:lang="en-US" id="id_1446237_505888_1_1">Cash And Cash Equivalents Period Increase Decrease</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl" xml:lang="en-US" id="id_1446237_505888_6_1">Net increase (decrease) in cash and cash equivalents</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl" xml:lang="en-US" id="id_1446237_504485_1_1">Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl" xml:lang="en-US" id="id_1446237_504485_2_1">Supplemental investing and financing information:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:to="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_CashPaidRefundedDuringPeriodForAbstract" xlink:label="pten_CashPaidRefundedDuringPeriodForAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_CashPaidRefundedDuringPeriodForAbstract_lbl" xml:lang="en-US" id="id_1446237_518670_3_1">Cash Paid Refunded During Period For [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_CashPaidRefundedDuringPeriodForAbstract_lbl" xml:lang="en-US" id="id_1446237_518670_1_1">Cash Paid Refunded During Period For [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_CashPaidRefundedDuringPeriodForAbstract_lbl" xml:lang="en-US" id="id_1446237_518670_2_1">Net cash paid during the period for:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_CashPaidRefundedDuringPeriodForAbstract" xlink:to="pten_CashPaidRefundedDuringPeriodForAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="us-gaap_CommitmentsAndContingencies"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xml:lang="en-US" id="id_1446237_501924_1_1">Commitments And Contingencies</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xml:lang="en-US" id="id_1446237_501924_2_1">Commitments and contingencies (see Note 9)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingencies" xlink:to="us-gaap_CommitmentsAndContingencies_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xml:lang="en-US" id="id_1446237_498000_1_1">Commitments And Contingencies Disclosure [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xml:lang="en-US" id="id_1446237_498000_2_1">Commitments and Contingencies Disclosure [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_CommitmentsAndContingenciesDisclosureLineItems" xlink:label="pten_CommitmentsAndContingenciesDisclosureLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_CommitmentsAndContingenciesDisclosureLineItems_lbl" xml:lang="en-US" id="id_1446237_518744_3_1">Commitments and Contingencies Disclosure [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_CommitmentsAndContingenciesDisclosureLineItems_lbl" xml:lang="en-US" id="id_1446237_518744_1_1">Commitments And Contingencies Disclosure [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_CommitmentsAndContingenciesDisclosureLineItems_lbl" xml:lang="en-US" id="id_1446237_518744_2_1">Commitments and Contingencies Disclosure [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_CommitmentsAndContingenciesDisclosureLineItems" xlink:to="pten_CommitmentsAndContingenciesDisclosureLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_CommitmentsAndContingenciesDisclosureTable" xlink:label="pten_CommitmentsAndContingenciesDisclosureTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_CommitmentsAndContingenciesDisclosureTable_lbl" xml:lang="en-US" id="id_1446237_541670_3_1">Commitments and Contingencies Disclosure [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_CommitmentsAndContingenciesDisclosureTable_lbl" xml:lang="en-US" id="id_1446237_541670_1_1">Commitments And Contingencies Disclosure [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_CommitmentsAndContingenciesDisclosureTable_lbl" xml:lang="en-US" id="id_1446237_541670_2_1">Commitments and Contingencies Disclosure [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_CommitmentsAndContingenciesDisclosureTable" xlink:to="pten_CommitmentsAndContingenciesDisclosureTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xml:lang="en-US" id="id_1446237_512236_1_1">Commitments And Contingencies Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xml:lang="en-US" id="id_1446237_512236_2_1">Commitments, Contingencies and Other Matters</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockDividendsPerShareCashPaid" xlink:label="us-gaap_CommonStockDividendsPerShareCashPaid"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockDividendsPerShareCashPaid_lbl" xml:lang="en-US" id="id_1446237_511467_1_1">Common Stock Dividends Per Share Cash Paid</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockDividendsPerShareCashPaid_lbl" xml:lang="en-US" id="id_1446237_511467_2_1">Cash dividends paid, per share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockDividendsPerShareCashPaid" xlink:to="us-gaap_CommonStockDividendsPerShareCashPaid_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared_lbl" xml:lang="en-US" id="id_1446237_503138_1_1">Common Stock Dividends Per Share Declared</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared_lbl" xml:lang="en-US" id="id_1446237_503138_2_1">Dividend per share, declared</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockDividendsPerShareDeclared" xlink:to="us-gaap_CommonStockDividendsPerShareDeclared_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_CommonStockDividendsPerShareDeclaredAndPaid" xlink:label="pten_CommonStockDividendsPerShareDeclaredAndPaid"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_CommonStockDividendsPerShareDeclaredAndPaid_lbl" xml:lang="en-US" id="id_1446237_539743_3_1">Per share dividends declared and paid during the period for each share of common stock outstanding.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_CommonStockDividendsPerShareDeclaredAndPaid_lbl" xml:lang="en-US" id="id_1446237_539743_1_1">Common Stock Dividends Per Share Declared And Paid</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_CommonStockDividendsPerShareDeclaredAndPaid_lbl" xml:lang="en-US" id="id_1446237_539743_2_1">Cash dividends per common share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_CommonStockDividendsPerShareDeclaredAndPaid" xlink:to="pten_CommonStockDividendsPerShareDeclaredAndPaid_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockMember_lbl" xml:lang="en-US" id="id_1446237_501348_1_1">Common Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockMember_lbl" xml:lang="en-US" id="id_1446237_501348_2_1">Common Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockMember" xlink:to="us-gaap_CommonStockMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xml:lang="en-US" id="id_1446237_512817_1_1">Common Stock Par Or Stated Value Per Share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xml:lang="en-US" id="id_1446237_512817_2_1">Common stock, par value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="us-gaap_CommonStockSharesAuthorized"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xml:lang="en-US" id="id_1446237_502587_1_1">Common Stock Shares Authorized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xml:lang="en-US" id="id_1446237_502587_2_1">Common stock, authorized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US" id="id_1446237_510226_1_1">Common Stock Shares Issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US" id="id_1446237_510226_4_1">Ending Balance (in shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US" id="id_1446237_510226_5_1">Beginning Balance (in shares)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US" id="id_1446237_510226_2_1">Common stock, issued</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US" id="id_1446237_504150_1_1">Common Stock Shares Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US" id="id_1446237_504150_2_1">Common stock, outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesOutstanding" xlink:to="us-gaap_CommonStockSharesOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US" id="id_1446237_512456_1_1">Common Stock Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US" id="id_1446237_512456_2_1">Common stock, par value $.01; authorized 300,000,000 shares with 185,212,330 and 184,059,900 issued and 146,427,968 and 145,913,162 outstanding at March 31, 2013 and December 31, 2012, respectively</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_CompensationRelatedCostsShareBasedPaymentsDisclosureLineItems" xlink:label="pten_CompensationRelatedCostsShareBasedPaymentsDisclosureLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_CompensationRelatedCostsShareBasedPaymentsDisclosureLineItems_lbl" xml:lang="en-US" id="id_1446237_518770_3_1">Compensation Related Costs Share Based Payments Disclosure [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_CompensationRelatedCostsShareBasedPaymentsDisclosureLineItems_lbl" xml:lang="en-US" id="id_1446237_518770_1_1">Compensation Related Costs Share Based Payments Disclosure [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_CompensationRelatedCostsShareBasedPaymentsDisclosureLineItems_lbl" xml:lang="en-US" id="id_1446237_518770_2_1">Compensation Related Costs Share Based Payments Disclosure [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_CompensationRelatedCostsShareBasedPaymentsDisclosureLineItems" xlink:to="pten_CompensationRelatedCostsShareBasedPaymentsDisclosureLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_CompensationRelatedCostsShareBasedPaymentsDisclosureTable" xlink:label="pten_CompensationRelatedCostsShareBasedPaymentsDisclosureTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_CompensationRelatedCostsShareBasedPaymentsDisclosureTable_lbl" xml:lang="en-US" id="id_1446237_541710_3_1">Compensation Related Costs Share Based Payments Disclosure [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_CompensationRelatedCostsShareBasedPaymentsDisclosureTable_lbl" xml:lang="en-US" id="id_1446237_541710_1_1">Compensation Related Costs Share Based Payments Disclosure [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_CompensationRelatedCostsShareBasedPaymentsDisclosureTable_lbl" xml:lang="en-US" id="id_1446237_541710_2_1">Compensation Related Costs Share Based Payments Disclosure [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_CompensationRelatedCostsShareBasedPaymentsDisclosureTable" xlink:to="pten_CompensationRelatedCostsShareBasedPaymentsDisclosureTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xml:lang="en-US" id="id_1446237_500373_1_1">Comprehensive Income Net Of Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xml:lang="en-US" id="id_1446237_500373_6_1">Total comprehensive income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomeNetOfTax" xlink:to="us-gaap_ComprehensiveIncomeNetOfTax_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_ConsolidatedDebtAsPercentageOfTotalCapitalization" xlink:label="pten_ConsolidatedDebtAsPercentageOfTotalCapitalization"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_ConsolidatedDebtAsPercentageOfTotalCapitalization_lbl" xml:lang="en-US" id="id_1446237_563713_3_1">Consolidated Debt As Percentage Of Total Capitalization</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_ConsolidatedDebtAsPercentageOfTotalCapitalization_lbl" xml:lang="en-US" id="id_1446237_563713_1_1">Consolidated Debt As Percentage Of Total Capitalization</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_ConsolidatedDebtAsPercentageOfTotalCapitalization_lbl" xml:lang="en-US" id="id_1446237_563713_2_1">Debt to capitalization ratio, percentage the Company must not exceed at any time</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ConsolidatedDebtAsPercentageOfTotalCapitalization" xlink:to="pten_ConsolidatedDebtAsPercentageOfTotalCapitalization_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_ContractDrillingExpenses" xlink:label="pten_ContractDrillingExpenses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_ContractDrillingExpenses_lbl" xml:lang="en-US" id="id_1446237_519482_3_1">Costs incurred in providing contract drilling services and related maintenance costs, contract preparation and mobilization costs.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_ContractDrillingExpenses_lbl" xml:lang="en-US" id="id_1446237_519482_1_1">Contract Drilling Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_ContractDrillingExpenses_lbl" xml:lang="en-US" id="id_1446237_519482_2_1">Contract drilling</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ContractDrillingExpenses" xlink:to="pten_ContractDrillingExpenses_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_ContractDrillingMember" xlink:label="pten_ContractDrillingMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_ContractDrillingMember_lbl" xml:lang="en-US" id="id_1446237_532151_3_1">Contract Drilling</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_ContractDrillingMember_lbl" xml:lang="en-US" id="id_1446237_532151_1_1">Contract Drilling [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_ContractDrillingMember_lbl" xml:lang="en-US" id="id_1446237_532151_2_1">Contract Drilling</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ContractDrillingMember" xlink:to="pten_ContractDrillingMember_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_ContractTerm" xlink:label="pten_ContractTerm"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_ContractTerm_lbl" xml:lang="en-US" id="id_1446237_529972_3_1">Contract Term</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_ContractTerm_lbl" xml:lang="en-US" id="id_1446237_529972_1_1">Contract Term</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_ContractTerm_lbl" xml:lang="en-US" id="id_1446237_529972_2_1">Contract term</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ContractTerm" xlink:to="pten_ContractTerm_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="us-gaap_CostsAndExpenses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostsAndExpenses_lbl" xml:lang="en-US" id="id_1446237_498134_1_1">Costs And Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CostsAndExpenses_lbl" xml:lang="en-US" id="id_1446237_498134_6_1">Total operating costs and expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostsAndExpenses" xlink:to="us-gaap_CostsAndExpenses_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_CreditFacilityMember" xlink:label="pten_CreditFacilityMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_CreditFacilityMember_lbl" xml:lang="en-US" id="id_1446237_535021_3_1">Credit Facility [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_CreditFacilityMember_lbl" xml:lang="en-US" id="id_1446237_535021_1_1">Credit Facility [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_CreditFacilityMember_lbl" xml:lang="en-US" id="id_1446237_535021_2_1">Credit Agreement</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_CreditFacilityMember" xlink:to="pten_CreditFacilityMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xml:lang="en-US" id="id_1446237_497832_1_1">Current Fiscal Year End Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xml:lang="en-US" id="id_1446237_497832_2_1">Current Fiscal Year End Date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CurrentFiscalYearEndDate" xlink:to="dei_CurrentFiscalYearEndDate_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_1446237_500498_1_1">Current Income Tax Expense Benefit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_1446237_500498_2_1">Current</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:to="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="us-gaap_CustomerRelationshipsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xml:lang="en-US" id="id_1446237_513385_1_1">Customer Relationships [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xml:lang="en-US" id="id_1446237_513385_2_1">Customer Relationships</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CustomerRelationshipsMember" xlink:to="us-gaap_CustomerRelationshipsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xml:lang="en-US" id="id_1446237_502217_1_1">Debt Disclosure [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xml:lang="en-US" id="id_1446237_502217_2_1">Debt Disclosure [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtDisclosureAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_DebtDisclosureLineItems" xlink:label="pten_DebtDisclosureLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_DebtDisclosureLineItems_lbl" xml:lang="en-US" id="id_1446237_518774_3_1">Debt Disclosure [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_DebtDisclosureLineItems_lbl" xml:lang="en-US" id="id_1446237_518774_1_1">Debt Disclosure [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_DebtDisclosureLineItems_lbl" xml:lang="en-US" id="id_1446237_518774_2_1">Debt Disclosure [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtDisclosureLineItems" xlink:to="pten_DebtDisclosureLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_DebtDisclosureTable" xlink:label="pten_DebtDisclosureTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_DebtDisclosureTable_lbl" xml:lang="en-US" id="id_1446237_541715_3_1">Debt Disclosure [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_DebtDisclosureTable_lbl" xml:lang="en-US" id="id_1446237_541715_1_1">Debt Disclosure [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_DebtDisclosureTable_lbl" xml:lang="en-US" id="id_1446237_541715_2_1">Debt Disclosure [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtDisclosureTable" xlink:to="pten_DebtDisclosureTable_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_DebtInstrumentAcceptanceTerms" xlink:label="pten_DebtInstrumentAcceptanceTerms"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_DebtInstrumentAcceptanceTerms_lbl" xml:lang="en-US" id="id_1446237_529141_3_1">Debt Instrument, Acceptance Terms</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_DebtInstrumentAcceptanceTerms_lbl" xml:lang="en-US" id="id_1446237_529141_1_1">Debt Instrument Acceptance Terms</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_DebtInstrumentAcceptanceTerms_lbl" xml:lang="en-US" id="id_1446237_529141_2_1">Description of the acceptance terms</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtInstrumentAcceptanceTerms" xlink:to="pten_DebtInstrumentAcceptanceTerms_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xml:lang="en-US" id="id_1446237_503845_1_1">Debt Instrument [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xml:lang="en-US" id="id_1446237_503845_2_1">Debt Instrument</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentCovenantDescription" xlink:label="us-gaap_DebtInstrumentCovenantDescription"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentCovenantDescription_lbl" xml:lang="en-US" id="id_1446237_505443_1_1">Debt Instrument Covenant Description</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentCovenantDescription_lbl" xml:lang="en-US" id="id_1446237_505443_2_1">Financial covenant description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentCovenantDescription" xlink:to="us-gaap_DebtInstrumentCovenantDescription_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentDateOfFirstRequiredPayment1" xlink:label="us-gaap_DebtInstrumentDateOfFirstRequiredPayment1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentDateOfFirstRequiredPayment1_lbl" xml:lang="en-US" id="id_1446237_510845_1_1">Debt Instrument Date Of First Required Payment 1</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentDateOfFirstRequiredPayment1_lbl" xml:lang="en-US" id="id_1446237_510845_2_1">Commencement date of principal payments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentDateOfFirstRequiredPayment1" xlink:to="us-gaap_DebtInstrumentDateOfFirstRequiredPayment1_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xml:lang="en-US" id="id_1446237_501055_1_1">Debt Instrument Face Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xml:lang="en-US" id="id_1446237_501055_2_1">Long-term debt, aggregate principal amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFaceAmount" xlink:to="us-gaap_DebtInstrumentFaceAmount_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="us-gaap_DebtInstrumentFairValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xml:lang="en-US" id="id_1446237_512366_1_1">Debt Instrument Fair Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xml:lang="en-US" id="id_1446237_512366_2_1">Fair value of Debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFairValue" xlink:to="us-gaap_DebtInstrumentFairValue_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_DebtInstrumentInterestRatePaymentDate" xlink:label="pten_DebtInstrumentInterestRatePaymentDate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_DebtInstrumentInterestRatePaymentDate_lbl" xml:lang="en-US" id="id_1446237_529090_3_1">Debt Instrument, Interest Rate, Payment Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_DebtInstrumentInterestRatePaymentDate_lbl" xml:lang="en-US" id="id_1446237_529090_1_1">Debt Instrument Interest Rate Payment Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_DebtInstrumentInterestRatePaymentDate_lbl" xml:lang="en-US" id="id_1446237_529090_2_1">Interest pay date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtInstrumentInterestRatePaymentDate" xlink:to="pten_DebtInstrumentInterestRatePaymentDate_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xml:lang="en-US" id="id_1446237_500674_1_1">Debt Instrument Interest Rate Stated Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xml:lang="en-US" id="id_1446237_500674_2_1">Debt interest rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentIssuanceDate1" xlink:label="us-gaap_DebtInstrumentIssuanceDate1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentIssuanceDate1_lbl" xml:lang="en-US" id="id_1446237_505814_1_1">Debt Instrument Issuance Date 1</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentIssuanceDate1_lbl" xml:lang="en-US" id="id_1446237_505814_2_1">Notes issuance date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentIssuanceDate1" xlink:to="us-gaap_DebtInstrumentIssuanceDate1_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="us-gaap_DebtInstrumentMaturityDate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xml:lang="en-US" id="id_1446237_503748_1_1">Debt Instrument Maturity Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xml:lang="en-US" id="id_1446237_503748_2_1">Debt maturity date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentMaturityDate" xlink:to="us-gaap_DebtInstrumentMaturityDate_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xml:lang="en-US" id="id_1446237_499147_1_1">Debt Instrument Name [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xml:lang="en-US" id="id_1446237_499147_2_1">Debt Instrument, Name [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="us-gaap_DebtInstrumentNameDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_DebtInstrumentPrepaymentTerms" xlink:label="pten_DebtInstrumentPrepaymentTerms"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_DebtInstrumentPrepaymentTerms_lbl" xml:lang="en-US" id="id_1446237_529140_3_1">Debt Instrument, Prepayment Terms</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_DebtInstrumentPrepaymentTerms_lbl" xml:lang="en-US" id="id_1446237_529140_1_1">Debt Instrument Prepayment Terms</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_DebtInstrumentPrepaymentTerms_lbl" xml:lang="en-US" id="id_1446237_529140_2_1">Description of the prepayment terms</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtInstrumentPrepaymentTerms" xlink:to="pten_DebtInstrumentPrepaymentTerms_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_DebtRedemptionPricePercentOfPrincipalAmount" xlink:label="pten_DebtRedemptionPricePercentOfPrincipalAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_DebtRedemptionPricePercentOfPrincipalAmount_lbl" xml:lang="en-US" id="id_1446237_540453_3_1">Debt Redemption Price Percent Of Principal Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_DebtRedemptionPricePercentOfPrincipalAmount_lbl" xml:lang="en-US" id="id_1446237_540453_1_1">Debt Redemption Price Percent Of Principal Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_DebtRedemptionPricePercentOfPrincipalAmount_lbl" xml:lang="en-US" id="id_1446237_540453_2_1">Prepayment terms, percent of principal before accrued and unpaid interest and "make-whole" premium</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DebtRedemptionPricePercentOfPrincipalAmount" xlink:to="pten_DebtRedemptionPricePercentOfPrincipalAmount_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_1446237_512538_1_1">Deferred Income Tax Expense Benefit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_1446237_512538_2_1">Deferred</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_1446237_512538_12_1">Deferred income tax expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="us-gaap_DeferredRevenueCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredRevenueCurrent_lbl" xml:lang="en-US" id="id_1446237_506610_1_1">Deferred Revenue Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredRevenueCurrent_lbl" xml:lang="en-US" id="id_1446237_506610_2_1">Deferred revenue-current</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRevenueCurrent" xlink:to="us-gaap_DeferredRevenueCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredRevenueRevenueRecognized" xlink:label="us-gaap_DeferredRevenueRevenueRecognized"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredRevenueRevenueRecognized_lbl" xml:lang="en-US" id="id_1446237_513407_1_1">Deferred Revenue Revenue Recognized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredRevenueRevenueRecognized_lbl" xml:lang="en-US" id="id_1446237_513407_2_1">Deferred revenue recognized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRevenueRevenueRecognized" xlink:to="us-gaap_DeferredRevenueRevenueRecognized_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent_lbl" xml:lang="en-US" id="id_1446237_503788_1_1">Deferred Tax Assets Liabilities Net Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent_lbl" xml:lang="en-US" id="id_1446237_503788_2_1">Deferred tax assets, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent" xlink:to="us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent_lbl" xml:lang="en-US" id="id_1446237_510709_1_1">Deferred Tax Assets Liabilities Net Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent_lbl" xml:lang="en-US" id="id_1446237_510709_8_1">Deferred tax liabilities, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent" xlink:to="us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiability" xlink:label="us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiability"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiability_lbl" xml:lang="en-US" id="id_1446237_506514_1_1">Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiability_lbl" xml:lang="en-US" id="id_1446237_506514_2_1">Deferred tax liabilities that have not been provided on such unremitted foreign earnings for United States Federal or state income taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiability" xlink:to="us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiability_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DepositsAssetsNoncurrent" xlink:label="us-gaap_DepositsAssetsNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DepositsAssetsNoncurrent_lbl" xml:lang="en-US" id="id_1446237_508116_1_1">Deposits Assets Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DepositsAssetsNoncurrent_lbl" xml:lang="en-US" id="id_1446237_508116_2_1">Deposits on equipment purchases</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepositsAssetsNoncurrent" xlink:to="us-gaap_DepositsAssetsNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_DepreciationDepletionAmortizationAndImpairment" xlink:label="pten_DepreciationDepletionAmortizationAndImpairment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_DepreciationDepletionAmortizationAndImpairment_lbl" xml:lang="en-US" id="id_1446237_525242_3_1">Depreciation, Depletion, Amortization and Impairment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_DepreciationDepletionAmortizationAndImpairment_lbl" xml:lang="en-US" id="id_1446237_525242_1_1">Depreciation Depletion Amortization And Impairment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_DepreciationDepletionAmortizationAndImpairment_lbl" xml:lang="en-US" id="id_1446237_525242_2_1">Depreciation, depletion, amortization and impairment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DepreciationDepletionAmortizationAndImpairment" xlink:to="pten_DepreciationDepletionAmortizationAndImpairment_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeContractTypeDomain_lbl" xml:lang="en-US" id="id_1446237_514812_1_1">Derivative Contract Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DerivativeContractTypeDomain_lbl" xml:lang="en-US" id="id_1446237_514812_2_1">Derivative Contract Type [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_DerivativeContractTypeDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeInstrumentRiskAxis_lbl" xml:lang="en-US" id="id_1446237_508971_1_1">Derivative Instrument Risk [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DerivativeInstrumentRiskAxis_lbl" xml:lang="en-US" id="id_1446237_508971_2_1">Derivative Instrument Risk</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_lbl" xml:lang="en-US" id="id_1446237_505453_1_1">Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_lbl" xml:lang="en-US" id="id_1446237_505453_2_1">Disclosure of Compensation Related Costs, Share-based Payments [Abstract]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xml:lang="en-US" id="id_1446237_514093_1_1">Disclosure Of Compensation Related Costs Share Based Payments [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xml:lang="en-US" id="id_1446237_514093_2_1">Stock-based Compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:to="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_DividendActivityTextBlock" xlink:label="pten_DividendActivityTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_DividendActivityTextBlock_lbl" xml:lang="en-US" id="id_1446237_538774_3_1">Dividend Activity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_DividendActivityTextBlock_lbl" xml:lang="en-US" id="id_1446237_538774_1_1">Dividend Activity [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_DividendActivityTextBlock_lbl" xml:lang="en-US" id="id_1446237_538774_2_1">Cash Dividends</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DividendActivityTextBlock" xlink:to="pten_DividendActivityTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DividendDeclaredMember" xlink:label="us-gaap_DividendDeclaredMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendDeclaredMember_lbl" xml:lang="en-US" id="id_1446237_498847_1_1">Dividend Declared [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendDeclaredMember_lbl" xml:lang="en-US" id="id_1446237_498847_2_1">Dividend Declared</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendPayableDateToBePaidDayMonthAndYear_lbl" xml:lang="en-US" id="id_1446237_502847_1_1">Dividend Payable Date To Be Paid Day Month And Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendPayableDateToBePaidDayMonthAndYear_lbl" xml:lang="en-US" id="id_1446237_502847_2_1">Cash dividends paid, date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DividendPayableDateToBePaidDayMonthAndYear_lbl" xml:lang="en-US" id="id_1446237_502847_12_1">Dividend payment date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendPayableDateToBePaidDayMonthAndYear" xlink:to="us-gaap_DividendPayableDateToBePaidDayMonthAndYear_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DividendsAxis" xlink:label="us-gaap_DividendsAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsAxis_lbl" xml:lang="en-US" id="id_1446237_501819_1_1">Dividends [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsAxis_lbl" xml:lang="en-US" id="id_1446237_501819_2_1">Dividends [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsAxis" xlink:to="us-gaap_DividendsAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:label="us-gaap_DividendsCommonStockCash"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsCommonStockCash_lbl" xml:lang="en-US" id="id_1446237_507565_1_1">Dividends Common Stock Cash</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsCommonStockCash_lbl" xml:lang="en-US" id="id_1446237_507565_2_1">Cash dividends paid</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_DividendsCommonStockCash_lbl" xml:lang="en-US" id="id_1446237_507565_8_1">Payment of cash dividends</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsCommonStockCash" xlink:to="us-gaap_DividendsCommonStockCash_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DividendsDomain" xlink:label="us-gaap_DividendsDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsDomain_lbl" xml:lang="en-US" id="id_1446237_508994_1_1">Dividends [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsDomain_lbl" xml:lang="en-US" id="id_1446237_508994_2_1">Dividends [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsDomain" xlink:to="us-gaap_DividendsDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DividendsPayableDateDeclaredDayMonthAndYear" xlink:label="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_lbl" xml:lang="en-US" id="id_1446237_511769_1_1">Dividends Payable Date Declared Day Month And Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_lbl" xml:lang="en-US" id="id_1446237_511769_2_1">Dividend declaration date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear" xlink:to="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DividendsPayableDateOfRecordDayMonthAndYear" xlink:label="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_lbl" xml:lang="en-US" id="id_1446237_511527_1_1">Dividends Payable Date Of Record Day Month And Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_lbl" xml:lang="en-US" id="id_1446237_511527_2_1">Dividend record date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear" xlink:to="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_DocumentDocumentandEntityInformationAbstract" xlink:label="pten_DocumentDocumentandEntityInformationAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_DocumentDocumentandEntityInformationAbstract_lbl" xml:lang="en-US" id="id_1446237_604557_3_1">Document Documentand Entity Information [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_DocumentDocumentandEntityInformationAbstract_lbl" xml:lang="en-US" id="id_1446237_604557_1_1">Document Documentand Entity Information [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_DocumentDocumentandEntityInformationAbstract_lbl" xml:lang="en-US" id="id_1446237_604557_2_1">Document Documentand Entity Information [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_DocumentDocumentandEntityInformationAbstract" xlink:to="pten_DocumentDocumentandEntityInformationAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xml:lang="en-US" id="id_1446237_497755_1_1">Document Fiscal Period Focus</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xml:lang="en-US" id="id_1446237_497755_2_1">Document Fiscal Period Focus</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalPeriodFocus" xlink:to="dei_DocumentFiscalPeriodFocus_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentFiscalYearFocus_lbl" xml:lang="en-US" id="id_1446237_497802_1_1">Document Fiscal Year Focus</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentFiscalYearFocus_lbl" xml:lang="en-US" id="id_1446237_497802_2_1">Document Fiscal Year Focus</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalYearFocus" xlink:to="dei_DocumentFiscalYearFocus_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentInformationLineItems" xlink:label="dei_DocumentInformationLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentInformationLineItems_lbl" xml:lang="en-US" id="id_1446237_497700_1_1">Document Information [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentInformationLineItems_lbl" xml:lang="en-US" id="id_1446237_497700_2_1">Document Information [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentInformationLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentPeriodEndDate_lbl" xml:lang="en-US" id="id_1446237_497817_1_1">Document Period End Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentPeriodEndDate_lbl" xml:lang="en-US" id="id_1446237_497817_2_1">Document Period End Date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentType_lbl" xml:lang="en-US" id="id_1446237_497812_1_1">Document Type</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentType_lbl" xml:lang="en-US" id="id_1446237_497812_2_1">Document Type</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="us-gaap_EarningsPerShareAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xml:lang="en-US" id="id_1446237_510187_1_1">Earnings Per Share [Abstract]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityDomain_lbl" xml:lang="en-US" id="id_1446237_497798_1_1">Entity [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_EntityDomain_lbl" xml:lang="en-US" id="id_1446237_497798_2_1">Entity [Domain]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityComponentDomain_lbl" xml:lang="en-US" id="id_1446237_501491_1_1">Equity Component [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EquityComponentDomain_lbl" xml:lang="en-US" id="id_1446237_501491_2_1">Equity Component [Domain]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_EventTimingDomain_lbl" xml:lang="en-US" id="id_1446237_535023_3_1">Event Timing [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_EventTimingDomain_lbl" xml:lang="en-US" id="id_1446237_535023_1_1">Event Timing [Domain]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTable_lbl" xml:lang="en-US" id="id_1446237_512635_2_1">Fair Value, by Balance Sheet Grouping [Table]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl" xml:lang="en-US" id="id_1446237_513345_2_1">Amortization period (in years)</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Goodwill_lbl" xml:lang="en-US" id="id_1446237_498098_1_1">Goodwill</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_lbl" xml:lang="en-US" id="id_1446237_512356_1_1">Goodwill And Intangible Assets Disclosure [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_lbl" xml:lang="en-US" id="id_1446237_512356_2_1">Goodwill and Intangible Assets Disclosure [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_GoodwillAndIntangibleAssetsDisclosureTable_lbl" xml:lang="en-US" id="id_1446237_541755_2_1">Goodwill and Intangible Assets Disclosure [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_GoodwillAndIntangibleAssetsDisclosureTable" xlink:to="pten_GoodwillAndIntangibleAssetsDisclosureTable_lbl"/>
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    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_GroupFourMember" xlink:label="pten_GroupFourMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_GroupFourMember_lbl" xml:lang="en-US" id="id_1446237_537109_3_1">Group Four [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_GroupFourMember_lbl" xml:lang="en-US" id="id_1446237_537109_1_1">Group Four [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_GroupFourMember_lbl" xml:lang="en-US" id="id_1446237_537109_2_1">Amount For The Final Four Quarterly Installments</label>
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    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_GroupOneMember" xlink:label="pten_GroupOneMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_GroupOneMember_lbl" xml:lang="en-US" id="id_1446237_537106_3_1">Group 1</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_GroupOneMember_lbl" xml:lang="en-US" id="id_1446237_537106_2_1">First Four Quarterly Installments</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_GroupThreeMember_lbl" xml:lang="en-US" id="id_1446237_537108_3_1">Group 3</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_GroupThreeMember_lbl" xml:lang="en-US" id="id_1446237_537108_2_1">Subsequent Four Quarterly Installments</label>
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    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_GroupTwoMember" xlink:label="pten_GroupTwoMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_GroupTwoMember_lbl" xml:lang="en-US" id="id_1446237_537107_3_1">Group 2</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_GroupTwoMember_lbl" xml:lang="en-US" id="id_1446237_537107_2_1">Subsequent Eight Quarterly Installments</label>
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    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_IncomeLossFromContinuingOperationsAllocableToNonVestedRestrictedShares" xlink:label="pten_IncomeLossFromContinuingOperationsAllocableToNonVestedRestrictedShares"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_IncomeLossFromContinuingOperationsAllocableToNonVestedRestrictedShares_lbl" xml:lang="en-US" id="id_1446237_523181_1_1">Income Loss From Continuing Operations Allocable To Non Vested Restricted Shares</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_lbl" xml:lang="en-US" id="id_1446237_507631_1_1">Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxDisclosureAbstract_lbl" xml:lang="en-US" id="id_1446237_501859_2_1">Income Tax Disclosure [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_IncomeTaxDisclosureAbstract_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xml:lang="en-US" id="id_1446237_510106_2_1">Income Taxes</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_IncomeTaxesLineItems_lbl" xml:lang="en-US" id="id_1446237_518729_3_1">Income Taxes [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_IncomeTaxesLineItems_lbl" xml:lang="en-US" id="id_1446237_518729_1_1">Income Taxes [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_IncomeTaxesLineItems_lbl" xml:lang="en-US" id="id_1446237_518729_2_1">Income Taxes [Line Items]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="us-gaap_IncomeTaxesPaidNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xml:lang="en-US" id="id_1446237_511420_1_1">Income Taxes Paid Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xml:lang="en-US" id="id_1446237_511420_2_1">Income taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxesPaidNet" xlink:to="us-gaap_IncomeTaxesPaidNet_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_IncomeTaxesTable" xlink:label="pten_IncomeTaxesTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_IncomeTaxesTable_lbl" xml:lang="en-US" id="id_1446237_541968_3_1">Income Taxes [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_IncomeTaxesTable_lbl" xml:lang="en-US" id="id_1446237_541968_1_1">Income Taxes [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_IncomeTaxesTable_lbl" xml:lang="en-US" id="id_1446237_541968_2_1">Income Taxes [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_IncomeTaxesTable" xlink:to="pten_IncomeTaxesTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_1446237_513638_1_1">Income Tax Expense Benefit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_1446237_513638_6_1">Total income tax expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="us-gaap_IncomeTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefitAbstract" xlink:label="us-gaap_IncomeTaxExpenseBenefitAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxExpenseBenefitAbstract_lbl" xml:lang="en-US" id="id_1446237_514452_1_1">Income Tax Expense Benefit [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxExpenseBenefitAbstract_lbl" xml:lang="en-US" id="id_1446237_514452_2_1">Income tax expense:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefitAbstract" xlink:to="us-gaap_IncomeTaxExpenseBenefitAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings" xlink:label="us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings_lbl" xml:lang="en-US" id="id_1446237_512664_1_1">Income Tax Reconciliation Repatriation Of Foreign Earnings</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings_lbl" xml:lang="en-US" id="id_1446237_512664_2_1">Reduction in deferred tax liabilities due to statutory tax rates in Canada being lower than those in the United States</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings" xlink:to="us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xml:lang="en-US" id="id_1446237_499519_1_1">Increase Decrease In Accounts Payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xml:lang="en-US" id="id_1446237_499519_2_1">Accounts payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsPayable" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xml:lang="en-US" id="id_1446237_507537_1_1">Increase Decrease In Accounts Receivable</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xml:lang="en-US" id="id_1446237_507537_8_1">Accounts receivable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:to="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xml:lang="en-US" id="id_1446237_514845_1_1">Increase Decrease In Accrued Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xml:lang="en-US" id="id_1446237_514845_2_1">Accrued expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:to="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_IncreaseDecreaseInIncomeTaxesReceivableAndPayable" xlink:label="pten_IncreaseDecreaseInIncomeTaxesReceivableAndPayable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_IncreaseDecreaseInIncomeTaxesReceivableAndPayable_lbl" xml:lang="en-US" id="id_1446237_524056_3_1">Increase (Decrease) in Income Taxes Receivable and Payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_IncreaseDecreaseInIncomeTaxesReceivableAndPayable_lbl" xml:lang="en-US" id="id_1446237_524056_1_1">Increase Decrease In Income Taxes Receivable And Payable</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="pten_IncreaseDecreaseInIncomeTaxesReceivableAndPayable_lbl" xml:lang="en-US" id="id_1446237_524056_8_1">Income taxes receivable/payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_IncreaseDecreaseInIncomeTaxesReceivableAndPayable" xlink:to="pten_IncreaseDecreaseInIncomeTaxesReceivableAndPayable_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_IncreaseDecreaseInInventoryAndOtherAssets" xlink:label="pten_IncreaseDecreaseInInventoryAndOtherAssets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_IncreaseDecreaseInInventoryAndOtherAssets_lbl" xml:lang="en-US" id="id_1446237_524057_3_1">Increase (Decrease) In Inventory and Other Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_IncreaseDecreaseInInventoryAndOtherAssets_lbl" xml:lang="en-US" id="id_1446237_524057_1_1">Increase Decrease In Inventory And Other Assets</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="pten_IncreaseDecreaseInInventoryAndOtherAssets_lbl" xml:lang="en-US" id="id_1446237_524057_8_1">Inventory and other assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_IncreaseDecreaseInInventoryAndOtherAssets" xlink:to="pten_IncreaseDecreaseInInventoryAndOtherAssets_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xml:lang="en-US" id="id_1446237_503089_1_1">Increase Decrease In Operating Capital [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xml:lang="en-US" id="id_1446237_503089_2_1">Changes in operating assets and liabilities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_lbl" xml:lang="en-US" id="id_1446237_498707_1_1">Increase Decrease In Other Operating Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_lbl" xml:lang="en-US" id="id_1446237_498707_2_1">Other liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:to="us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_IncrementalIncomeLossRelatedToPotentialCommonShares" xlink:label="pten_IncrementalIncomeLossRelatedToPotentialCommonShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_IncrementalIncomeLossRelatedToPotentialCommonShares_lbl" xml:lang="en-US" id="id_1446237_523856_3_1">Incremental Income (Loss) Related to Potential Common Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_IncrementalIncomeLossRelatedToPotentialCommonShares_lbl" xml:lang="en-US" id="id_1446237_523856_1_1">Incremental Income Loss Related To Potential Common Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_IncrementalIncomeLossRelatedToPotentialCommonShares_lbl" xml:lang="en-US" id="id_1446237_523856_2_1">Add incremental earnings related to potential common shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_IncrementalIncomeLossRelatedToPotentialCommonShares" xlink:to="pten_IncrementalIncomeLossRelatedToPotentialCommonShares_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IntangibleAssetsNetIncludingGoodwill" xlink:label="us-gaap_IntangibleAssetsNetIncludingGoodwill"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IntangibleAssetsNetIncludingGoodwill_lbl" xml:lang="en-US" id="id_1446237_498622_1_1">Intangible Assets Net Including Goodwill</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IntangibleAssetsNetIncludingGoodwill_lbl" xml:lang="en-US" id="id_1446237_498622_2_1">Goodwill and intangible assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IntangibleAssetsNetIncludingGoodwill" xlink:to="us-gaap_IntangibleAssetsNetIncludingGoodwill_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_InterestCoverageRatio" xlink:label="pten_InterestCoverageRatio"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_InterestCoverageRatio_lbl" xml:lang="en-US" id="id_1446237_519184_3_1">Interest Coverage ratio</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_InterestCoverageRatio_lbl" xml:lang="en-US" id="id_1446237_519184_1_1">Interest Coverage Ratio</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_InterestCoverageRatio_lbl" xml:lang="en-US" id="id_1446237_519184_2_1">Interest coverage ratio that the Company must exceed on the last day of the fiscal quarter</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InterestCoverageRatio" xlink:to="pten_InterestCoverageRatio_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US" id="id_1446237_514855_1_1">Interest Expense</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US" id="id_1446237_514855_8_1">Interest expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpense" xlink:to="us-gaap_InterestExpense_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_InterestExpenseNet" xlink:label="pten_InterestExpenseNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_InterestExpenseNet_lbl" xml:lang="en-US" id="id_1446237_519713_3_1">The aggregate interest expense incurred on trading liabilities, commercial paper, long-term debt, capital leases, deposits and all other borrowings, net of interest earned.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_InterestExpenseNet_lbl" xml:lang="en-US" id="id_1446237_519713_1_1">Interest Expense Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_InterestExpenseNet_lbl" xml:lang="en-US" id="id_1446237_519713_2_1">Interest expense on debt extinguishment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_InterestExpenseNet" xlink:to="pten_InterestExpenseNet_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestPaidCapitalized" xlink:label="us-gaap_InterestPaidCapitalized"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestPaidCapitalized_lbl" xml:lang="en-US" id="id_1446237_498960_1_1">Interest Paid Capitalized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestPaidCapitalized_lbl" xml:lang="en-US" id="id_1446237_498960_2_1">Interest expense, capitalized interest</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPaidCapitalized" xlink:to="us-gaap_InterestPaidCapitalized_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="us-gaap_InterestPaidNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestPaidNet_lbl" xml:lang="en-US" id="id_1446237_513309_1_1">Interest Paid Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestPaidNet_lbl" xml:lang="en-US" id="id_1446237_513309_2_1">Interest, net of capitalized interest of $2,281 in 2013 and $1,968 in 2012</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPaidNet" xlink:to="us-gaap_InterestPaidNet_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestPayableCurrent" xlink:label="us-gaap_InterestPayableCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestPayableCurrent_lbl" xml:lang="en-US" id="id_1446237_512870_1_1">Interest Payable Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestPayableCurrent_lbl" xml:lang="en-US" id="id_1446237_512870_2_1">Accrued interest payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPayableCurrent" xlink:to="us-gaap_InterestPayableCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IntersegmentEliminationMember" xlink:label="us-gaap_IntersegmentEliminationMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IntersegmentEliminationMember_lbl" xml:lang="en-US" id="id_1446237_512120_1_1">Intersegment Elimination [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IntersegmentEliminationMember_lbl" xml:lang="en-US" id="id_1446237_512120_2_1">Intersegment Elimination</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IntersegmentEliminationMember" xlink:to="us-gaap_IntersegmentEliminationMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryNet_lbl" xml:lang="en-US" id="id_1446237_508278_1_1">Inventory Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryNet_lbl" xml:lang="en-US" id="id_1446237_508278_2_1">Inventory</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryNet_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="us-gaap_InvestmentIncomeInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xml:lang="en-US" id="id_1446237_504284_1_1">Investment Income Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xml:lang="en-US" id="id_1446237_504284_2_1">Interest income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIncomeInterest" xlink:to="us-gaap_InvestmentIncomeInterest_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Land" xlink:label="us-gaap_Land"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Land_lbl" xml:lang="en-US" id="id_1446237_513063_1_1">Land</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_Land_lbl" xml:lang="en-US" id="id_1446237_513063_2_1">Land</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Land" xlink:to="us-gaap_Land_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_LegalEntityAxis_lbl" xml:lang="en-US" id="id_1446237_497730_1_1">Legal Entity [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_LegalEntityAxis_lbl" xml:lang="en-US" id="id_1446237_497730_2_1">Legal Entity [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LegalEntityAxis" xlink:to="dei_LegalEntityAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:label="us-gaap_LetterOfCreditMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LetterOfCreditMember_lbl" xml:lang="en-US" id="id_1446237_501305_1_1">Letter Of Credit [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LetterOfCreditMember_lbl" xml:lang="en-US" id="id_1446237_501305_2_1">Letter of Credit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LetterOfCreditMember" xlink:to="us-gaap_LetterOfCreditMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="us-gaap_LettersOfCreditOutstandingAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_lbl" xml:lang="en-US" id="id_1446237_510967_1_1">Letters Of Credit Outstanding Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_lbl" xml:lang="en-US" id="id_1446237_510967_2_1">Letters of credit, collateral for retrospective premiums and retained losses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_lbl" xml:lang="en-US" id="id_1446237_510967_12_1">Unfunded letters of credit, amount outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LettersOfCreditOutstandingAmount" xlink:to="us-gaap_LettersOfCreditOutstandingAmount_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US" id="id_1446237_506022_1_1">Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US" id="id_1446237_506022_6_1">Total liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US" id="id_1446237_508780_1_1">Liabilities And Stockholders Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US" id="id_1446237_508780_6_1">Total liabilities and stockholders' equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xml:lang="en-US" id="id_1446237_501524_1_1">Liabilities And Stockholders Equity [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xml:lang="en-US" id="id_1446237_501524_2_1">LIABILITIES AND STOCKHOLDERS' EQUITY</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xml:lang="en-US" id="id_1446237_511950_1_1">Liabilities Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xml:lang="en-US" id="id_1446237_511950_6_1">Total current liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xml:lang="en-US" id="id_1446237_510138_1_1">Liabilities Current [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xml:lang="en-US" id="id_1446237_510138_2_1">Current liabilities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_LineOfCreditFacilityAdditionalBorrowingCapacity" xlink:label="pten_LineOfCreditFacilityAdditionalBorrowingCapacity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_LineOfCreditFacilityAdditionalBorrowingCapacity_lbl" xml:lang="en-US" id="id_1446237_521560_3_1">Line of Credit Facility, Additional Borrowing Capacity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_LineOfCreditFacilityAdditionalBorrowingCapacity_lbl" xml:lang="en-US" id="id_1446237_521560_1_1">Line Of Credit Facility Additional Borrowing Capacity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_LineOfCreditFacilityAdditionalBorrowingCapacity_lbl" xml:lang="en-US" id="id_1446237_521560_2_1">Aggregate amount by which the revolving credit facility can be increased</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_LineOfCreditFacilityAdditionalBorrowingCapacity" xlink:to="pten_LineOfCreditFacilityAdditionalBorrowingCapacity_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityAmountOutstanding" xlink:label="us-gaap_LineOfCreditFacilityAmountOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityAmountOutstanding_lbl" xml:lang="en-US" id="id_1446237_504418_1_1">Line Of Credit Facility Amount Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityAmountOutstanding_lbl" xml:lang="en-US" id="id_1446237_504418_2_1">Line of credit, amount outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityAmountOutstanding" xlink:to="us-gaap_LineOfCreditFacilityAmountOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="us-gaap_LineOfCreditFacilityAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityAxis_lbl" xml:lang="en-US" id="id_1446237_507199_1_1">Line Of Credit Facility [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityAxis_lbl" xml:lang="en-US" id="id_1446237_507199_2_1">Line of Credit Facility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityAxis" xlink:to="us-gaap_LineOfCreditFacilityAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityCovenantTerms" xlink:label="us-gaap_LineOfCreditFacilityCovenantTerms"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityCovenantTerms_lbl" xml:lang="en-US" id="id_1446237_500512_1_1">Line Of Credit Facility Covenant Terms</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityCovenantTerms_lbl" xml:lang="en-US" id="id_1446237_500512_2_1">Financial covenant description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityCovenantTerms" xlink:to="us-gaap_LineOfCreditFacilityCovenantTerms_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_lbl" xml:lang="en-US" id="id_1446237_506947_1_1">Line Of Credit Facility Current Borrowing Capacity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_lbl" xml:lang="en-US" id="id_1446237_506947_2_1">Current aggregate borrowing capacity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms" xlink:label="us-gaap_LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms_lbl" xml:lang="en-US" id="id_1446237_502137_1_1">Line Of Credit Facility Frequency Of Payment And Payment Terms</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms_lbl" xml:lang="en-US" id="id_1446237_502137_2_1">Line of credit facility, frequency of payment and payment terms</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms" xlink:to="us-gaap_LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityFrequencyOfPayments" xlink:label="us-gaap_LineOfCreditFacilityFrequencyOfPayments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityFrequencyOfPayments_lbl" xml:lang="en-US" id="id_1446237_508244_1_1">Line Of Credit Facility Frequency Of Payments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityFrequencyOfPayments_lbl" xml:lang="en-US" id="id_1446237_508244_2_1">Line of credit facility, frequency of payments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityFrequencyOfPayments" xlink:to="us-gaap_LineOfCreditFacilityFrequencyOfPayments_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd" xlink:label="us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_lbl" xml:lang="en-US" id="id_1446237_500282_1_1">Line Of Credit Facility Interest Rate At Period End</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_lbl" xml:lang="en-US" id="id_1446237_500282_2_1">Line of credit facility, interest rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd" xlink:to="us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain_lbl" xml:lang="en-US" id="id_1446237_504794_1_1">Line Of Credit Facility Lender [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain_lbl" xml:lang="en-US" id="id_1446237_504794_2_1">Line of Credit Facility, Lender [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityLenderDomain" xlink:to="us-gaap_LineOfCreditFacilityLenderDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xml:lang="en-US" id="id_1446237_507704_1_1">Line Of Credit Facility Maximum Borrowing Capacity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xml:lang="en-US" id="id_1446237_507704_2_1">Credit facility, maximum borrowing capacity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_lbl" xml:lang="en-US" id="id_1446237_510040_1_1">Line Of Credit Facility Remaining Borrowing Capacity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_lbl" xml:lang="en-US" id="id_1446237_510040_2_1">Line of credit, available borrowing capacity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl" xml:lang="en-US" id="id_1446237_505631_1_1">Line Of Credit Facility Unused Capacity Commitment Fee Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl" xml:lang="en-US" id="id_1446237_505631_2_1">Commitment fee payable to the lenders for the unused portion of the credit facility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:to="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_LondonInterbankOfferedRateMember" xlink:label="pten_LondonInterbankOfferedRateMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_LondonInterbankOfferedRateMember_lbl" xml:lang="en-US" id="id_1446237_515733_3_1">LIBOR</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_LondonInterbankOfferedRateMember_lbl" xml:lang="en-US" id="id_1446237_515733_1_1">London Interbank Offered Rate [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_LondonInterbankOfferedRateMember_lbl" xml:lang="en-US" id="id_1446237_515733_2_1">LIBOR</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_LondonInterbankOfferedRateMember" xlink:to="pten_LondonInterbankOfferedRateMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebt_lbl" xml:lang="en-US" id="id_1446237_509175_1_1">Long Term Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebt_lbl" xml:lang="en-US" id="id_1446237_509175_2_1">Carrying value of Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LongTermDebt_lbl" xml:lang="en-US" id="id_1446237_509175_6_1">Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebt" xlink:to="us-gaap_LongTermDebt_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="us-gaap_LongTermDebtCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtCurrent_lbl" xml:lang="en-US" id="id_1446237_514137_1_1">Long Term Debt Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtCurrent_lbl" xml:lang="en-US" id="id_1446237_514137_2_1">Current portion of long-term debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtCurrent" xlink:to="us-gaap_LongTermDebtCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" xml:lang="en-US" id="id_1446237_513672_1_1">Long Term Debt Maturities Repayments Of Principal After Year Five</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" xml:lang="en-US" id="id_1446237_513672_2_1">Thereafter</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl" xml:lang="en-US" id="id_1446237_498498_1_1">Long Term Debt Maturities Repayments Of Principal In Next Twelve Months</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl" xml:lang="en-US" id="id_1446237_498498_2_1">2013</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xml:lang="en-US" id="id_1446237_502284_1_1">Long Term Debt Maturities Repayments Of Principal In Year Five</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xml:lang="en-US" id="id_1446237_502284_2_1">2017</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xml:lang="en-US" id="id_1446237_512846_1_1">Long Term Debt Maturities Repayments Of Principal In Year Four</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xml:lang="en-US" id="id_1446237_512846_2_1">2016</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xml:lang="en-US" id="id_1446237_500380_1_1">Long Term Debt Maturities Repayments Of Principal In Year Three</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xml:lang="en-US" id="id_1446237_500380_2_1">2015</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xml:lang="en-US" id="id_1446237_510561_1_1">Long Term Debt Maturities Repayments Of Principal In Year Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xml:lang="en-US" id="id_1446237_510561_2_1">2014</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems" xlink:label="pten_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems_lbl" xml:lang="en-US" id="id_1446237_518919_3_1">Long Term Debt Maturities Repayments Of Principal [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems_lbl" xml:lang="en-US" id="id_1446237_518919_1_1">Long Term Debt Maturities Repayments Of Principal [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems_lbl" xml:lang="en-US" id="id_1446237_518919_2_1">Long Term Debt Maturities Repayments Of Principal [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems" xlink:to="pten_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_LongTermDebtMaturitiesRepaymentsOfPrincipalTable" xlink:label="pten_LongTermDebtMaturitiesRepaymentsOfPrincipalTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_LongTermDebtMaturitiesRepaymentsOfPrincipalTable_lbl" xml:lang="en-US" id="id_1446237_541714_3_1">Long Term Debt Maturities Repayments Of Principal [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_LongTermDebtMaturitiesRepaymentsOfPrincipalTable_lbl" xml:lang="en-US" id="id_1446237_541714_1_1">Long Term Debt Maturities Repayments Of Principal [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_LongTermDebtMaturitiesRepaymentsOfPrincipalTable_lbl" xml:lang="en-US" id="id_1446237_541714_2_1">Long Term Debt Maturities Repayments Of Principal [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_LongTermDebtMaturitiesRepaymentsOfPrincipalTable" xlink:to="pten_LongTermDebtMaturitiesRepaymentsOfPrincipalTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="us-gaap_LongTermDebtNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xml:lang="en-US" id="id_1446237_514586_1_1">Long Term Debt Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xml:lang="en-US" id="id_1446237_514586_2_1">Long-term debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtNoncurrent" xlink:to="us-gaap_LongTermDebtNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtTextBlock" xlink:label="us-gaap_LongTermDebtTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtTextBlock_lbl" xml:lang="en-US" id="id_1446237_514602_1_1">Long Term Debt [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtTextBlock_lbl" xml:lang="en-US" id="id_1446237_514602_2_1">Long Term Debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtTextBlock" xlink:to="us-gaap_LongTermDebtTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="us-gaap_LongtermDebtTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xml:lang="en-US" id="id_1446237_500478_1_1">Longterm Debt Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xml:lang="en-US" id="id_1446237_500478_2_1">Long-term Debt, Type</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermDebtTypeAxis" xlink:to="us-gaap_LongtermDebtTypeAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="us-gaap_LongtermDebtTypeDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xml:lang="en-US" id="id_1446237_511866_1_1">Longterm Debt Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xml:lang="en-US" id="id_1446237_511866_2_1">Long-term Debt, Type [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermDebtTypeDomain" xlink:to="us-gaap_LongtermDebtTypeDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MachineryAndEquipmentGross" xlink:label="us-gaap_MachineryAndEquipmentGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MachineryAndEquipmentGross_lbl" xml:lang="en-US" id="id_1446237_501796_1_1">Machinery And Equipment Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MachineryAndEquipmentGross_lbl" xml:lang="en-US" id="id_1446237_501796_2_1">Equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MachineryAndEquipmentGross" xlink:to="us-gaap_MachineryAndEquipmentGross_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MaterialReconcilingItemsMember" xlink:label="us-gaap_MaterialReconcilingItemsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MaterialReconcilingItemsMember_lbl" xml:lang="en-US" id="id_1446237_513779_1_1">Material Reconciling Items [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MaterialReconcilingItemsMember_lbl" xml:lang="en-US" id="id_1446237_513779_2_1">Corporate and other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MaterialReconcilingItemsMember" xlink:to="us-gaap_MaterialReconcilingItemsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MaximumMember" xlink:label="us-gaap_MaximumMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MaximumMember_lbl" xml:lang="en-US" id="id_1446237_514053_1_1">Maximum [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MaximumMember_lbl" xml:lang="en-US" id="id_1446237_514053_2_1">Maximum</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MaximumMember" xlink:to="us-gaap_MaximumMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MinimumMember" xlink:label="us-gaap_MinimumMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinimumMember_lbl" xml:lang="en-US" id="id_1446237_513639_1_1">Minimum [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MinimumMember_lbl" xml:lang="en-US" id="id_1446237_513639_2_1">Minimum</label>
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    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_MinimumPercentageOfFairValueTransactionsCorroboratedUsingObservableMarketInputsRequiredForLevelTwo" xlink:label="pten_MinimumPercentageOfFairValueTransactionsCorroboratedUsingObservableMarketInputsRequiredForLevelTwo"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_MinimumPercentageOfFairValueTransactionsCorroboratedUsingObservableMarketInputsRequiredForLevelTwo_lbl" xml:lang="en-US" id="id_1446237_544320_3_1">Minimum Percentage of Fair Value Transactions Corroborated Using Observable Market Inputs Required for Level Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_MinimumPercentageOfFairValueTransactionsCorroboratedUsingObservableMarketInputsRequiredForLevelTwo_lbl" xml:lang="en-US" id="id_1446237_544320_1_1">Minimum Percentage Of Fair Value Transactions Corroborated Using Observable Market Inputs Required For Level Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_MinimumPercentageOfFairValueTransactionsCorroboratedUsingObservableMarketInputsRequiredForLevelTwo_lbl" xml:lang="en-US" id="id_1446237_544320_2_1">Current market rates used in measuring fair value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_MinimumPercentageOfFairValueTransactionsCorroboratedUsingObservableMarketInputsRequiredForLevelTwo" xlink:to="pten_MinimumPercentageOfFairValueTransactionsCorroboratedUsingObservableMarketInputsRequiredForLevelTwo_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xml:lang="en-US" id="id_1446237_508099_1_1">Net Cash Provided By Used In Financing Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xml:lang="en-US" id="id_1446237_508099_6_1">Net cash used in financing activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xml:lang="en-US" id="id_1446237_503174_1_1">Net Cash Provided By Used In Financing Activities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xml:lang="en-US" id="id_1446237_503174_2_1">Cash flows from financing activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xml:lang="en-US" id="id_1446237_504277_1_1">Net Cash Provided By Used In Investing Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xml:lang="en-US" id="id_1446237_504277_6_1">Net cash used in investing activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xml:lang="en-US" id="id_1446237_501589_1_1">Net Cash Provided By Used In Investing Activities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xml:lang="en-US" id="id_1446237_501589_2_1">Cash flows from investing activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US" id="id_1446237_504077_1_1">Net Cash Provided By Used In Operating Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US" id="id_1446237_504077_6_1">Net cash provided by operating activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US" id="id_1446237_505595_1_1">Net Cash Provided By Used In Operating Activities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US" id="id_1446237_505595_2_1">Cash flows from operating activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_NetDecreaseIncreaseInDepositsOnEquipmentPurchases" xlink:label="pten_NetDecreaseIncreaseInDepositsOnEquipmentPurchases"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_NetDecreaseIncreaseInDepositsOnEquipmentPurchases_lbl" xml:lang="en-US" id="id_1446237_524058_3_1">Net Decrease (Increase) In Deposits on Equipment Purchases</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_NetDecreaseIncreaseInDepositsOnEquipmentPurchases_lbl" xml:lang="en-US" id="id_1446237_524058_1_1">Net Decrease Increase In Deposits On Equipment Purchases</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_NetDecreaseIncreaseInDepositsOnEquipmentPurchases_lbl" xml:lang="en-US" id="id_1446237_524058_2_1">Net decrease in deposits on equipment purchases</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_NetDecreaseIncreaseInDepositsOnEquipmentPurchases" xlink:to="pten_NetDecreaseIncreaseInDepositsOnEquipmentPurchases_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xml:lang="en-US" id="id_1446237_513871_1_1">Net Income Loss Available To Common Stockholders Basic</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xml:lang="en-US" id="id_1446237_513871_2_1">Income attributed to common stockholders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xml:lang="en-US" id="id_1446237_513871_6_1">Income attributed to common stockholders</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xml:lang="en-US" id="id_1446237_514857_1_1">Net Income Loss Available To Common Stockholders Diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xml:lang="en-US" id="id_1446237_514857_6_1">Adjusted income attributed to common stockholders</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_lbl" xml:lang="en-US" id="id_1446237_514736_1_1">New Accounting Pronouncements And Changes In Accounting Principles [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_lbl" xml:lang="en-US" id="id_1446237_514736_2_1">Recently Issued Accounting Standards</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock" xlink:to="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1" xlink:label="us-gaap_NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1_lbl" xml:lang="en-US" id="id_1446237_501509_1_1">Noncash Or Part Noncash Acquisition Net Nonmonetary Assets Acquired Liabilities Assumed 1</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1_lbl" xml:lang="en-US" id="id_1446237_501509_2_1">Net increase in current liabilities for purchase of property and equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1" xlink:to="us-gaap_NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NoncompeteAgreementsMember" xlink:label="us-gaap_NoncompeteAgreementsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NoncompeteAgreementsMember_lbl" xml:lang="en-US" id="id_1446237_498774_1_1">Noncompete Agreements [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NoncompeteAgreementsMember_lbl" xml:lang="en-US" id="id_1446237_498774_2_1">Non-compete Agreement</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncompeteAgreementsMember" xlink:to="us-gaap_NoncompeteAgreementsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="us-gaap_NonoperatingIncomeExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xml:lang="en-US" id="id_1446237_513079_1_1">Nonoperating Income Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xml:lang="en-US" id="id_1446237_513079_6_1">Total other expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NonoperatingIncomeExpense" xlink:to="us-gaap_NonoperatingIncomeExpense_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xml:lang="en-US" id="id_1446237_504667_1_1">Nonoperating Income Expense [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xml:lang="en-US" id="id_1446237_504667_2_1">Other income (expense):</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NonoperatingIncomeExpenseAbstract" xlink:to="us-gaap_NonoperatingIncomeExpenseAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_NonRevolvingSeniorSecuredTermLoanMember" xlink:label="pten_NonRevolvingSeniorSecuredTermLoanMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_NonRevolvingSeniorSecuredTermLoanMember_lbl" xml:lang="en-US" id="id_1446237_532868_3_1">Non Revolving Senior Secured Term Loan</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_NonRevolvingSeniorSecuredTermLoanMember_lbl" xml:lang="en-US" id="id_1446237_532868_1_1">Non Revolving Senior Secured Term Loan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_NonRevolvingSeniorSecuredTermLoanMember_lbl" xml:lang="en-US" id="id_1446237_532868_2_1">Non Revolving Senior Secured Term Loan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_NonRevolvingSeniorSecuredTermLoanMember" xlink:to="pten_NonRevolvingSeniorSecuredTermLoanMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesAndLoansReceivableGrossNoncurrent" xlink:label="us-gaap_NotesAndLoansReceivableGrossNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NotesAndLoansReceivableGrossNoncurrent_lbl" xml:lang="en-US" id="id_1446237_509881_1_1">Notes And Loans Receivable Gross Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NotesAndLoansReceivableGrossNoncurrent_lbl" xml:lang="en-US" id="id_1446237_509881_2_1">Notes receivable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NotesAndLoansReceivableGrossNoncurrent" xlink:to="us-gaap_NotesAndLoansReceivableGrossNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NotesAndLoansReceivableNetCurrent" xlink:label="us-gaap_NotesAndLoansReceivableNetCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NotesAndLoansReceivableNetCurrent_lbl" xml:lang="en-US" id="id_1446237_514005_1_1">Notes And Loans Receivable Net Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NotesAndLoansReceivableNetCurrent_lbl" xml:lang="en-US" id="id_1446237_514005_2_1">Notes receivable outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NotesAndLoansReceivableNetCurrent" xlink:to="us-gaap_NotesAndLoansReceivableNetCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_NotesReceivableInterestRate" xlink:label="pten_NotesReceivableInterestRate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_NotesReceivableInterestRate_lbl" xml:lang="en-US" id="id_1446237_540590_3_1">Notes Receivable Interest Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_NotesReceivableInterestRate_lbl" xml:lang="en-US" id="id_1446237_540590_1_1">Notes Receivable Interest Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_NotesReceivableInterestRate_lbl" xml:lang="en-US" id="id_1446237_540590_2_1">Notes receivable interest rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_NotesReceivableInterestRate" xlink:to="pten_NotesReceivableInterestRate_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_NumberOfCovenants" xlink:label="pten_NumberOfCovenants"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_NumberOfCovenants_lbl" xml:lang="en-US" id="id_1446237_529582_3_1">Number of Covenants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_NumberOfCovenants_lbl" xml:lang="en-US" id="id_1446237_529582_1_1">Number Of Covenants</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_NumberOfCovenants_lbl" xml:lang="en-US" id="id_1446237_529582_2_1">Number of compliance covenants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_NumberOfCovenants" xlink:to="pten_NumberOfCovenants_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="us-gaap_NumberOfReportableSegments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xml:lang="en-US" id="id_1446237_510140_1_1">Number Of Reportable Segments</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OilAndGasProductionExpense" xlink:label="us-gaap_OilAndGasProductionExpense"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OilAndGasProductionExpense_lbl" xml:lang="en-US" id="id_1446237_499805_2_1">Oil and natural gas</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OilAndGasProductionExpense" xlink:to="us-gaap_OilAndGasProductionExpense_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OilAndGasPropertySuccessfulEffortMethodGross" xlink:label="us-gaap_OilAndGasPropertySuccessfulEffortMethodGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OilAndGasPropertySuccessfulEffortMethodGross_lbl" xml:lang="en-US" id="id_1446237_504037_1_1">Oil And Gas Property Successful Effort Method Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OilAndGasPropertySuccessfulEffortMethodGross_lbl" xml:lang="en-US" id="id_1446237_504037_2_1">Oil and natural gas properties</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OilAndGasPropertySuccessfulEffortMethodGross" xlink:to="us-gaap_OilAndGasPropertySuccessfulEffortMethodGross_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OilAndGasSalesRevenue_lbl" xml:lang="en-US" id="id_1446237_511357_1_1">Oil And Gas Sales Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OilAndGasSalesRevenue_lbl" xml:lang="en-US" id="id_1446237_511357_2_1">Oil and natural gas</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OilAndGasSalesRevenue" xlink:to="us-gaap_OilAndGasSalesRevenue_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_OilAndNaturalGasMember" xlink:label="pten_OilAndNaturalGasMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_OilAndNaturalGasMember_lbl" xml:lang="en-US" id="id_1446237_532153_3_1">Oil and Natural Gas</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_OilAndNaturalGasMember_lbl" xml:lang="en-US" id="id_1446237_532153_1_1">Oil And Natural Gas [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_OilAndNaturalGasMember_lbl" xml:lang="en-US" id="id_1446237_532153_2_1">Oil and Natural Gas</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_OilAndNaturalGasMember" xlink:to="pten_OilAndNaturalGasMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingCostsAndExpensesAbstract" xlink:label="us-gaap_OperatingCostsAndExpensesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingCostsAndExpensesAbstract_lbl" xml:lang="en-US" id="id_1446237_506807_1_1">Operating Costs And Expenses [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingCostsAndExpensesAbstract_lbl" xml:lang="en-US" id="id_1446237_506807_2_1">Operating costs and expenses:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingCostsAndExpensesAbstract" xlink:to="us-gaap_OperatingCostsAndExpensesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="us-gaap_OperatingIncomeLoss"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xml:lang="en-US" id="id_1446237_498863_1_1">Operating Income Loss</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xml:lang="en-US" id="id_1446237_498863_2_1">Operating income (loss)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xml:lang="en-US" id="id_1446237_498863_6_1">Operating income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingIncomeLoss" xlink:to="us-gaap_OperatingIncomeLoss_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="us-gaap_OperatingSegmentsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingSegmentsMember_lbl" xml:lang="en-US" id="id_1446237_503689_1_1">Operating Segments [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingSegmentsMember_lbl" xml:lang="en-US" id="id_1446237_503689_2_1">Operating Segments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingSegmentsMember" xlink:to="us-gaap_OperatingSegmentsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xml:lang="en-US" id="id_1446237_508274_1_1">Organization Consolidation And Presentation Of Financial Statements [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xml:lang="en-US" id="id_1446237_508274_2_1">Organization, Consolidation and Presentation of Financial Statements [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xml:lang="en-US" id="id_1446237_513925_1_1">Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xml:lang="en-US" id="id_1446237_513925_2_1">Basis of Consolidation and Presentation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xml:lang="en-US" id="id_1446237_502085_1_1">Other Accrued Liabilities Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xml:lang="en-US" id="id_1446237_502085_2_1">Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccruedLiabilitiesCurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="us-gaap_OtherAssetsCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xml:lang="en-US" id="id_1446237_499884_1_1">Other Assets Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xml:lang="en-US" id="id_1446237_499884_2_1">Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsCurrent" xlink:to="us-gaap_OtherAssetsCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="us-gaap_OtherAssetsNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xml:lang="en-US" id="id_1446237_500225_1_1">Other Assets Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xml:lang="en-US" id="id_1446237_500225_2_1">Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsNoncurrent" xlink:to="us-gaap_OtherAssetsNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl" xml:lang="en-US" id="id_1446237_507555_1_1">Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl" xml:lang="en-US" id="id_1446237_507555_2_1">Foreign currency translation adjustment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_lbl" xml:lang="en-US" id="id_1446237_500163_1_1">Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_lbl" xml:lang="en-US" id="id_1446237_500163_2_1">Other comprehensive income (loss), net of taxes of $0 and $0, respectively:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:to="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherComprehensiveIncomeLossTax_lbl" xml:lang="en-US" id="id_1446237_499782_1_1">Other Comprehensive Income Loss Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherComprehensiveIncomeLossTax_lbl" xml:lang="en-US" id="id_1446237_499782_2_1">Other comprehensive income (loss), taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossTax_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="us-gaap_OtherLiabilitiesNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_1446237_506871_1_1">Other Liabilities Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_1446237_506871_2_1">Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherLiabilitiesNoncurrent" xlink:to="us-gaap_OtherLiabilitiesNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNonoperatingIncome" xlink:label="us-gaap_OtherNonoperatingIncome"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherNonoperatingIncome_lbl" xml:lang="en-US" id="id_1446237_507349_1_1">Other Nonoperating Income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherNonoperatingIncome_lbl" xml:lang="en-US" id="id_1446237_507349_2_1">Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingIncome" xlink:to="us-gaap_OtherNonoperatingIncome_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PayablesAndAccrualsAbstract" xlink:label="us-gaap_PayablesAndAccrualsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PayablesAndAccrualsAbstract_lbl" xml:lang="en-US" id="id_1446237_505438_1_1">Payables And Accruals [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PayablesAndAccrualsAbstract_lbl" xml:lang="en-US" id="id_1446237_505438_2_1">Payables and Accruals [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PayablesAndAccrualsAbstract" xlink:to="us-gaap_PayablesAndAccrualsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xml:lang="en-US" id="id_1446237_503189_1_1">Payments For Repurchase Of Common Stock</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xml:lang="en-US" id="id_1446237_503189_8_1">Purchase of treasury stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:to="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xml:lang="en-US" id="id_1446237_504304_1_1">Payments Of Debt Issuance Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xml:lang="en-US" id="id_1446237_504304_2_1">Debt issuance costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfDebtIssuanceCosts" xlink:to="us-gaap_PaymentsOfDebtIssuanceCosts_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="us-gaap_PaymentsOfDividends"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsOfDividends_lbl" xml:lang="en-US" id="id_1446237_514105_1_1">Payments Of Dividends</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_PaymentsOfDividends_lbl" xml:lang="en-US" id="id_1446237_514105_8_1">Dividends paid</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfDividends" xlink:to="us-gaap_PaymentsOfDividends_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_1446237_505828_1_1">Payments To Acquire Property Plant And Equipment</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_1446237_505828_8_1">Purchase of property and equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_PercentageOfRepurchasePriceToPrincipalDebtAmount" xlink:label="pten_PercentageOfRepurchasePriceToPrincipalDebtAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_PercentageOfRepurchasePriceToPrincipalDebtAmount_lbl" xml:lang="en-US" id="id_1446237_540497_3_1">Percentage of repurchase price to principal debt amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_PercentageOfRepurchasePriceToPrincipalDebtAmount_lbl" xml:lang="en-US" id="id_1446237_540497_1_1">Percentage Of Repurchase Price To Principal Debt Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_PercentageOfRepurchasePriceToPrincipalDebtAmount_lbl" xml:lang="en-US" id="id_1446237_540497_2_1">Acceptance terms, percent of principal before accrued and unpaid interest</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PercentageOfRepurchasePriceToPrincipalDebtAmount" xlink:to="pten_PercentageOfRepurchasePriceToPrincipalDebtAmount_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_PerformanceAwardBaseNumberOfShares" xlink:label="pten_PerformanceAwardBaseNumberOfShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_PerformanceAwardBaseNumberOfShares_lbl" xml:lang="en-US" id="id_1446237_528843_3_1">Performance Award, Base Number of Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_PerformanceAwardBaseNumberOfShares_lbl" xml:lang="en-US" id="id_1446237_528843_1_1">Performance Award Base Number Of Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_PerformanceAwardBaseNumberOfShares_lbl" xml:lang="en-US" id="id_1446237_528843_2_1">Base number of shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PerformanceAwardBaseNumberOfShares" xlink:to="pten_PerformanceAwardBaseNumberOfShares_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_PerformanceAwardTargetNumberOfShares" xlink:label="pten_PerformanceAwardTargetNumberOfShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_PerformanceAwardTargetNumberOfShares_lbl" xml:lang="en-US" id="id_1446237_701557_3_1">Performance award, target number of shares.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_PerformanceAwardTargetNumberOfShares_lbl" xml:lang="en-US" id="id_1446237_701557_1_1">Performance Award Target Number Of Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_PerformanceAwardTargetNumberOfShares_lbl" xml:lang="en-US" id="id_1446237_701557_2_1">Target number of shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PerformanceAwardTargetNumberOfShares" xlink:to="pten_PerformanceAwardTargetNumberOfShares_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_PerformanceUnitAwardsTwentyElevenMember" xlink:label="pten_PerformanceUnitAwardsTwentyElevenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_PerformanceUnitAwardsTwentyElevenMember_lbl" xml:lang="en-US" id="id_1446237_517415_3_1">Performance Unit Awards 2011</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_PerformanceUnitAwardsTwentyElevenMember_lbl" xml:lang="en-US" id="id_1446237_517415_1_1">Performance Unit Awards Twenty Eleven [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_PerformanceUnitAwardsTwentyElevenMember_lbl" xml:lang="en-US" id="id_1446237_517415_2_1">Performance Unit Awards 2011</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PerformanceUnitAwardsTwentyElevenMember" xlink:to="pten_PerformanceUnitAwardsTwentyElevenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_PerformanceUnitAwardsTwentyTenMember" xlink:label="pten_PerformanceUnitAwardsTwentyTenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_PerformanceUnitAwardsTwentyTenMember_lbl" xml:lang="en-US" id="id_1446237_516893_3_1">Performance Unit Awards 2010</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_PerformanceUnitAwardsTwentyTenMember_lbl" xml:lang="en-US" id="id_1446237_516893_1_1">Performance Unit Awards Twenty Ten [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_PerformanceUnitAwardsTwentyTenMember_lbl" xml:lang="en-US" id="id_1446237_516893_2_1">Performance Unit Awards 2010</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PerformanceUnitAwardsTwentyTenMember" xlink:to="pten_PerformanceUnitAwardsTwentyTenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_PerformanceUnitAwardsTwentyTwelveMember" xlink:label="pten_PerformanceUnitAwardsTwentyTwelveMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_PerformanceUnitAwardsTwentyTwelveMember_lbl" xml:lang="en-US" id="id_1446237_547921_3_1">Performance Unit AwardsTwentyTwelve [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_PerformanceUnitAwardsTwentyTwelveMember_lbl" xml:lang="en-US" id="id_1446237_547921_1_1">Performance Unit Awards Twenty Twelve [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_PerformanceUnitAwardsTwentyTwelveMember_lbl" xml:lang="en-US" id="id_1446237_547921_2_1">Performance Unit Awards 2012</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PerformanceUnitAwardsTwentyTwelveMember" xlink:to="pten_PerformanceUnitAwardsTwentyTwelveMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xml:lang="en-US" id="id_1446237_508638_1_1">Preferred Stock Par Or Stated Value Per Share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xml:lang="en-US" id="id_1446237_508638_2_1">Preferred stock, par value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockParOrStatedValuePerShare" xlink:to="us-gaap_PreferredStockParOrStatedValuePerShare_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="us-gaap_PreferredStockSharesAuthorized"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xml:lang="en-US" id="id_1446237_507083_1_1">Preferred Stock Shares Authorized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xml:lang="en-US" id="id_1446237_507083_2_1">Preferred stock, authorized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="us-gaap_PreferredStockSharesIssued"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xml:lang="en-US" id="id_1446237_513613_1_1">Preferred Stock Shares Issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xml:lang="en-US" id="id_1446237_513613_2_1">Preferred stock, shares issued</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesIssued" xlink:to="us-gaap_PreferredStockSharesIssued_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="us-gaap_PreferredStockValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US" id="id_1446237_513620_1_1">Preferred Stock Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US" id="id_1446237_513620_2_1">Preferred stock, par value $.01; authorized 1,000,000 shares, no shares issued</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockValue" xlink:to="us-gaap_PreferredStockValue_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_PressurePumpingMember" xlink:label="pten_PressurePumpingMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_PressurePumpingMember_lbl" xml:lang="en-US" id="id_1446237_532152_3_1">Pressure Pumping</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_PressurePumpingMember_lbl" xml:lang="en-US" id="id_1446237_532152_1_1">Pressure Pumping [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_PressurePumpingMember_lbl" xml:lang="en-US" id="id_1446237_532152_2_1">Pressure Pumping</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PressurePumpingMember" xlink:to="pten_PressurePumpingMember_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_PressurePumpingOperatingCost" xlink:label="pten_PressurePumpingOperatingCost"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_PressurePumpingOperatingCost_lbl" xml:lang="en-US" id="id_1446237_524054_3_1">Pressure Pumping Operating Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_PressurePumpingOperatingCost_lbl" xml:lang="en-US" id="id_1446237_524054_1_1">Pressure Pumping Operating Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_PressurePumpingOperatingCost_lbl" xml:lang="en-US" id="id_1446237_524054_2_1">Pressure pumping</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PressurePumpingOperatingCost" xlink:to="pten_PressurePumpingOperatingCost_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_PrincipalPaymentsPercentage" xlink:label="pten_PrincipalPaymentsPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_PrincipalPaymentsPercentage_lbl" xml:lang="en-US" id="id_1446237_540297_3_1">Principal payments, percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_PrincipalPaymentsPercentage_lbl" xml:lang="en-US" id="id_1446237_540297_1_1">Principal Payments Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_PrincipalPaymentsPercentage_lbl" xml:lang="en-US" id="id_1446237_540297_2_1">Installment amounts percentage of the original principal amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_PrincipalPaymentsPercentage" xlink:to="pten_PrincipalPaymentsPercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromCollectionOfNotesReceivable" xlink:label="us-gaap_ProceedsFromCollectionOfNotesReceivable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromCollectionOfNotesReceivable_lbl" xml:lang="en-US" id="id_1446237_501051_1_1">Proceeds From Collection Of Notes Receivable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromCollectionOfNotesReceivable_lbl" xml:lang="en-US" id="id_1446237_501051_2_1">Repayment of notes receivable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromCollectionOfNotesReceivable" xlink:to="us-gaap_ProceedsFromCollectionOfNotesReceivable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromLinesOfCredit" xlink:label="us-gaap_ProceedsFromLinesOfCredit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromLinesOfCredit_lbl" xml:lang="en-US" id="id_1446237_501314_1_1">Proceeds From Lines Of Credit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromLinesOfCredit_lbl" xml:lang="en-US" id="id_1446237_501314_2_1">Proceeds from borrowing under revolving credit facility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromLinesOfCredit" xlink:to="us-gaap_ProceedsFromLinesOfCredit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_1446237_502218_1_1">Proceeds From Sale Of Property Plant And Equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_1446237_502218_2_1">Proceeds from disposal of assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:to="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="us-gaap_ProceedsFromStockOptionsExercised"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xml:lang="en-US" id="id_1446237_503911_1_1">Proceeds From Stock Options Exercised</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xml:lang="en-US" id="id_1446237_503911_2_1">Proceeds from exercise of stock options</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromStockOptionsExercised" xlink:to="us-gaap_ProceedsFromStockOptionsExercised_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProfitLoss" xlink:label="us-gaap_ProfitLoss"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProfitLoss_lbl" xml:lang="en-US" id="id_1446237_502446_1_1">Profit Loss</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProfitLoss_lbl" xml:lang="en-US" id="id_1446237_502446_2_1">Net income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_ProfitLoss_lbl" xml:lang="en-US" id="id_1446237_502446_6_1">Net income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_ProfitLoss_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="us-gaap_PropertyPlantAndEquipmentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentAbstract_lbl" xml:lang="en-US" id="id_1446237_505180_1_1">Property Plant And Equipment [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentAbstract_lbl" xml:lang="en-US" id="id_1446237_505180_2_1">Property, Plant and Equipment [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentAbstract" xlink:to="us-gaap_PropertyPlantAndEquipmentAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl" xml:lang="en-US" id="id_1446237_508779_1_1">Property Plant And Equipment Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl" xml:lang="en-US" id="id_1446237_508779_2_1">Property and Equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="us-gaap_PropertyPlantAndEquipmentGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xml:lang="en-US" id="id_1446237_498887_1_1">Property Plant And Equipment Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xml:lang="en-US" id="id_1446237_498887_6_1">Property, Plant and Equipment, Gross, Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_PropertyPlantAndEquipmentGross_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xml:lang="en-US" id="id_1446237_502948_1_1">Property Plant And Equipment [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xml:lang="en-US" id="id_1446237_502948_2_1">Property, Plant and Equipment [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_PropertyPlantAndEquipmentLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ReconciliationOfChangesInAssetRetirementObligationsLineItems" xlink:to="pten_ReconciliationOfChangesInAssetRetirementObligationsLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_ReconciliationOfChangesInAssetRetirementObligationsTable_lbl" xml:lang="en-US" id="id_1446237_541658_3_1">Reconciliation of Changes in Asset Retirement Obligations [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_ReconciliationOfChangesInAssetRetirementObligationsTable_lbl" xml:lang="en-US" id="id_1446237_541658_1_1">Reconciliation Of Changes In Asset Retirement Obligations [Table]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ReconciliationOfChangesInAssetRetirementObligationsTable" xlink:to="pten_ReconciliationOfChangesInAssetRetirementObligationsTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:label="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_lbl" xml:lang="en-US" id="id_1446237_514749_2_1">Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:to="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_lbl" xml:lang="en-US" id="id_1446237_503563_1_1">Reconciliation Of Revenue From Segments To Consolidated [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_lbl" xml:lang="en-US" id="id_1446237_503563_2_1">Reconciliation of Revenue from Segments to Consolidated [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable" xlink:to="us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RelatedPartyDomain_lbl" xml:lang="en-US" id="id_1446237_499013_2_1">Related Party [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xml:lang="en-US" id="id_1446237_507611_1_1">Related Party Transactions By Related Party [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xml:lang="en-US" id="id_1446237_507611_2_1">Related Party Transactions, by Related Party</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RepaymentsOfLinesOfCredit" xlink:label="us-gaap_RepaymentsOfLinesOfCredit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfLinesOfCredit_lbl" xml:lang="en-US" id="id_1446237_505493_1_1">Repayments Of Lines Of Credit</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_RepaymentsOfLinesOfCredit_lbl" xml:lang="en-US" id="id_1446237_505493_8_1">Repayment of borrowing under revolving credit facility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfLinesOfCredit" xlink:to="us-gaap_RepaymentsOfLinesOfCredit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="us-gaap_RepaymentsOfLongTermDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xml:lang="en-US" id="id_1446237_499971_1_1">Repayments Of Long Term Debt</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xml:lang="en-US" id="id_1446237_499971_8_1">Repayment of long-term debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfLongTermDebt" xlink:to="us-gaap_RepaymentsOfLongTermDebt_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_RestrictedStockAwardsMember" xlink:label="pten_RestrictedStockAwardsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_RestrictedStockAwardsMember_lbl" xml:lang="en-US" id="id_1446237_531299_3_1">Restricted Stock Awards</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_RestrictedStockAwardsMember_lbl" xml:lang="en-US" id="id_1446237_531299_1_1">Restricted Stock Awards [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_RestrictedStockAwardsMember_lbl" xml:lang="en-US" id="id_1446237_531299_2_1">Restricted Stock Awards</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_RestrictedStockAwardsMember" xlink:to="pten_RestrictedStockAwardsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xml:lang="en-US" id="id_1446237_510905_1_1">Restricted Stock Units R S U [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xml:lang="en-US" id="id_1446237_510905_2_1">Restricted Stock Units (RSUs)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedStockUnitsRSUMember" xlink:to="us-gaap_RestrictedStockUnitsRSUMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xml:lang="en-US" id="id_1446237_507557_1_1">Retained Earnings Accumulated Deficit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xml:lang="en-US" id="id_1446237_507557_2_1">Retained earnings</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetainedEarningsMember_lbl" xml:lang="en-US" id="id_1446237_503287_1_1">Retained Earnings [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RetainedEarningsMember_lbl" xml:lang="en-US" id="id_1446237_503287_2_1">Retained Earnings</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsMember" xlink:to="us-gaap_RetainedEarningsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RevenueOilAndGasServices" xlink:label="us-gaap_RevenueOilAndGasServices"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenueOilAndGasServices_lbl" xml:lang="en-US" id="id_1446237_501166_1_1">Revenue Oil And Gas Services</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RevenueOilAndGasServices_lbl" xml:lang="en-US" id="id_1446237_501166_2_1">Oil and gas services</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueOilAndGasServices" xlink:to="us-gaap_RevenueOilAndGasServices_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="us-gaap_RevenuesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenuesAbstract_lbl" xml:lang="en-US" id="id_1446237_503208_1_1">Revenues [Abstract]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SalesRevenueNet_lbl" xml:lang="en-US" id="id_1446237_507423_1_1">Sales Revenue Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SalesRevenueNet_lbl" xml:lang="en-US" id="id_1446237_507423_2_1">Revenues</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SalesRevenueNet_lbl" xml:lang="en-US" id="id_1446237_507423_12_1">Total operating revenues</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassTable_lbl" xml:lang="en-US" id="id_1446237_541731_3_1">Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Table]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xml:lang="en-US" id="id_1446237_504588_1_1">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentReportingAssetReconcilingItemLineItems_lbl" xml:lang="en-US" id="id_1446237_499133_2_1">Segment Reporting, Asset Reconciling Item [Line Items]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_SegmentReportingDisclosureLineItems_lbl" xml:lang="en-US" id="id_1446237_518742_1_1">Segment Reporting Disclosure [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_SegmentReportingDisclosureLineItems_lbl" xml:lang="en-US" id="id_1446237_518742_2_1">Segment Reporting Disclosure [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_SegmentReportingDisclosureLineItems" xlink:to="pten_SegmentReportingDisclosureLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_SegmentReportingDisclosureTable" xlink:label="pten_SegmentReportingDisclosureTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_SegmentReportingDisclosureTable_lbl" xml:lang="en-US" id="id_1446237_542039_3_1">Segment Reporting Disclosure [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_SegmentReportingDisclosureTable_lbl" xml:lang="en-US" id="id_1446237_542039_1_1">Segment Reporting Disclosure [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_SegmentReportingDisclosureTable_lbl" xml:lang="en-US" id="id_1446237_542039_2_1">Segment Reporting Disclosure [Table]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_lbl" xml:lang="en-US" id="id_1446237_505962_1_1">Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_lbl" xml:lang="en-US" id="id_1446237_505962_2_1">Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SegmentReportingRevenueReconcilingItemLineItems" xlink:label="us-gaap_SegmentReportingRevenueReconcilingItemLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingRevenueReconcilingItemLineItems_lbl" xml:lang="en-US" id="id_1446237_511873_1_1">Segment Reporting Revenue Reconciling Item [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentReportingRevenueReconcilingItemLineItems_lbl" xml:lang="en-US" id="id_1446237_511873_2_1">Segment Reporting, Revenue Reconciling Item [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingRevenueReconcilingItemLineItems" xlink:to="us-gaap_SegmentReportingRevenueReconcilingItemLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xml:lang="en-US" id="id_1446237_513334_1_1">Selling General And Administrative Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xml:lang="en-US" id="id_1446237_513334_2_1">Selling, general and administrative</label>
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    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_SemiAnnualPaymentFirstPaymentMember" xlink:label="pten_SemiAnnualPaymentFirstPaymentMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_SemiAnnualPaymentFirstPaymentMember_lbl" xml:lang="en-US" id="id_1446237_532700_3_1">Semi Annual Payment, First Payment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_SemiAnnualPaymentFirstPaymentMember_lbl" xml:lang="en-US" id="id_1446237_532700_1_1">Semi Annual Payment First Payment [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_SemiAnnualPaymentFirstPaymentMember_lbl" xml:lang="en-US" id="id_1446237_532700_2_1">Semi Annual Payment, First Payment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_SemiAnnualPaymentFirstPaymentMember" xlink:to="pten_SemiAnnualPaymentFirstPaymentMember_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_SemiAnnualPaymentSecondPaymentMember_lbl" xml:lang="en-US" id="id_1446237_532701_3_1">Semi Annual Payment, Second Payment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_SemiAnnualPaymentSecondPaymentMember_lbl" xml:lang="en-US" id="id_1446237_532701_1_1">Semi Annual Payment Second Payment [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_SemiAnnualPaymentSecondPaymentMember_lbl" xml:lang="en-US" id="id_1446237_532701_2_1">Semi Annual Payment, Second Payment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_SemiAnnualPaymentSecondPaymentMember" xlink:to="pten_SemiAnnualPaymentSecondPaymentMember_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember" xlink:label="pten_SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember_lbl" xml:lang="en-US" id="id_1446237_516913_3_1">Series A, Senior Notes, 4.97 Percent, Due October 5th 2020</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember_lbl" xml:lang="en-US" id="id_1446237_516913_1_1">Series A Senior Notes Four Point Nine Seven Percent Due October Five Twenty Twenty [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember_lbl" xml:lang="en-US" id="id_1446237_516913_2_1">Series A, Senior Notes, 4.97 Percent, Due October 5th 2020</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_SeriesASeniorNotesMember_lbl" xml:lang="en-US" id="id_1446237_536149_3_1">Series A Senior Notes [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_SeriesASeniorNotesMember_lbl" xml:lang="en-US" id="id_1446237_536149_1_1">Series A Senior Notes [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_SeriesASeniorNotesMember_lbl" xml:lang="en-US" id="id_1446237_536149_2_1">Series A Senior Notes, 4.97 Percent</label>
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    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_SeriesBSeniorNotesFourPointTwoSevenPercentDueJuneFourteenTwentyTwentyTwoMemberMember" xlink:label="pten_SeriesBSeniorNotesFourPointTwoSevenPercentDueJuneFourteenTwentyTwentyTwoMemberMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_SeriesBSeniorNotesFourPointTwoSevenPercentDueJuneFourteenTwentyTwentyTwoMemberMember_lbl" xml:lang="en-US" id="id_1446237_601707_3_1">Series B, Senior Notes Four Point Two Seven Percent Due June Fourteen Twenty Twenty Two Member [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_lbl" xml:lang="en-US" id="id_1446237_514454_1_1">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xml:lang="en-US" id="id_1446237_500719_1_1">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xml:lang="en-US" id="id_1446237_500719_2_1">Granted</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xml:lang="en-US" id="id_1446237_507062_1_1">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xml:lang="en-US" id="id_1446237_510998_5_1">Outstanding at beginning of period</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_lbl" xml:lang="en-US" id="id_1446237_507412_2_1">Shares</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xml:lang="en-US" id="id_1446237_506515_2_1">Share-based Compensation Arrangement by Share-based Payment Award [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_lbl" xml:lang="en-US" id="id_1446237_505029_1_1">Share Based Compensation Arrangement By Share Based Payment Award Options Additional Disclosures [Abstract]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl" xml:lang="en-US" id="id_1446237_503873_1_1">Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl" xml:lang="en-US" id="id_1446237_508840_2_1">Cancelled</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xml:lang="en-US" id="id_1446237_507672_1_1">Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xml:lang="en-US" id="id_1446237_507672_4_1">Outstanding at end of period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xml:lang="en-US" id="id_1446237_507672_5_1">Outstanding at beginning of period</label>
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    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformancePeriod" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformancePeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformancePeriod_lbl" xml:lang="en-US" id="id_1446237_530395_3_1">Share Based Compensation Arrangement by Share Based Payment Award, Performance Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformancePeriod_lbl" xml:lang="en-US" id="id_1446237_530395_1_1">Share Based Compensation Arrangement By Share Based Payment Award Performance Period</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US" id="id_1446237_505372_1_1">Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US" id="id_1446237_500653_1_1">Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US" id="id_1446237_500653_2_1">Expired</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US" id="id_1446237_501696_1_1">Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US" id="id_1446237_501696_2_1">Cancelled</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US" id="id_1446237_501417_1_1">Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US" id="id_1446237_501417_2_1">Granted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_ShareBasedCompensationExpenseByAwardTypeTextBlock_lbl" xml:lang="en-US" id="id_1446237_538638_3_1">Share Based Compensation Expense by Award Type [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_ShareBasedCompensationExpenseByAwardTypeTextBlock_lbl" xml:lang="en-US" id="id_1446237_538638_1_1">Share Based Compensation Expense By Award Type [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_ShareBasedCompensationExpenseByAwardTypeTextBlock_lbl" xml:lang="en-US" id="id_1446237_538638_2_1">Compensation Expense Associated with Stock-Settled Performance Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_ShareBasedCompensationExpenseByAwardTypeTextBlock" xlink:to="pten_ShareBasedCompensationExpenseByAwardTypeTextBlock_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareRepurchaseProgramAxis_lbl" xml:lang="en-US" id="id_1446237_502360_1_1">Share Repurchase Program [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareRepurchaseProgramAxis_lbl" xml:lang="en-US" id="id_1446237_502360_2_1">Share Repurchase Program</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareRepurchaseProgramAxis" xlink:to="us-gaap_ShareRepurchaseProgramAxis_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareRepurchaseProgramDomain_lbl" xml:lang="en-US" id="id_1446237_501821_1_1">Share Repurchase Program [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareRepurchaseProgramDomain_lbl" xml:lang="en-US" id="id_1446237_501821_2_1">Share Repurchase Program [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareRepurchaseProgramDomain" xlink:to="us-gaap_ShareRepurchaseProgramDomain_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_SharesOfCommonStockIssued_lbl" xml:lang="en-US" id="id_1446237_584338_3_1">Shares Of Common Stock Issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_SharesOfCommonStockIssued_lbl" xml:lang="en-US" id="id_1446237_584338_1_1">Shares Of Common Stock Issued</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_SharesOfCommonStockIssued" xlink:to="pten_SharesOfCommonStockIssued_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xml:lang="en-US" id="id_1446237_500291_1_1">Statement Business Segments [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xml:lang="en-US" id="id_1446237_500291_2_1">Statement, Business Segments</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xml:lang="en-US" id="id_1446237_505872_1_1">Statement Equity Components [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xml:lang="en-US" id="id_1446237_505872_2_1">Equity Components [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_StatementEquityComponentsAxis_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementLineItems_lbl" xml:lang="en-US" id="id_1446237_507536_1_1">Statement [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementLineItems_lbl" xml:lang="en-US" id="id_1446237_507536_2_1">Statement [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xml:lang="en-US" id="id_1446237_511205_2_1">Statement of Cash Flows [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xml:lang="en-US" id="id_1446237_505972_2_1">Statement of Financial Position [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_StatementOfFinancialPositionAbstract_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xml:lang="en-US" id="id_1446237_502727_2_1">Statement of Stockholders' Equity [Abstract]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementScenarioAxis" xlink:to="us-gaap_StatementScenarioAxis_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementTable_lbl" xml:lang="en-US" id="id_1446237_509593_2_1">Statement [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xml:lang="en-US" id="id_1446237_498963_2_1">Stockholders' equity:</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xml:lang="en-US" id="id_1446237_498764_2_1">Stockholders' Equity</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_StockholdersEquityNoteLineItems_lbl" xml:lang="en-US" id="id_1446237_518725_1_1">Stockholders Equity Note [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_StockholdersEquityNoteLineItems_lbl" xml:lang="en-US" id="id_1446237_518725_2_1">Stockholders Equity Note [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_StockholdersEquityNoteLineItems" xlink:to="pten_StockholdersEquityNoteLineItems_lbl"/>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures_lbl" xml:lang="en-US" id="id_1446237_512508_1_1">Stock Issued During Period Value Restricted Stock Award Forfeitures</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures_lbl" xml:lang="en-US" id="id_1446237_512508_8_1">Forfeitures of restricted stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures" xlink:to="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross_lbl" xml:lang="en-US" id="id_1446237_502550_1_1">Stock Issued During Period Value Restricted Stock Award Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross_lbl" xml:lang="en-US" id="id_1446237_502550_2_1">Issuance of restricted stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross" xlink:to="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xml:lang="en-US" id="id_1446237_507318_1_1">Stock Issued During Period Value Stock Options Exercised</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xml:lang="en-US" id="id_1446237_507318_2_1">Exercise of stock options</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockOptionsMember" xlink:label="us-gaap_StockOptionsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockOptionsMember_lbl" xml:lang="en-US" id="id_1446237_514283_1_1">Stock Options [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockOptionsMember_lbl" xml:lang="en-US" id="id_1446237_514283_2_1">Stock Options</label>
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    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_StockRepurchasePlanMember" xlink:label="pten_StockRepurchasePlanMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_StockRepurchasePlanMember_lbl" xml:lang="en-US" id="id_1446237_535853_3_1">Stock Repurchase Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_StockRepurchasePlanMember_lbl" xml:lang="en-US" id="id_1446237_535853_1_1">Stock Repurchase Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_StockRepurchasePlanMember_lbl" xml:lang="en-US" id="id_1446237_535853_2_1">Stock Repurchase Plan</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount_lbl" xml:lang="en-US" id="id_1446237_508758_1_1">Stock Repurchase Program Authorized Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount_lbl" xml:lang="en-US" id="id_1446237_508758_2_1">Amount approved for repurchases under stock buyback program</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRepurchaseProgramAuthorizedAmount" xlink:to="us-gaap_StockRepurchaseProgramAuthorizedAmount_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventMember_lbl" xml:lang="en-US" id="id_1446237_511390_1_1">Subsequent Event [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventMember_lbl" xml:lang="en-US" id="id_1446237_511390_2_1">Subsequent Event</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventMember" xlink:to="us-gaap_SubsequentEventMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="us-gaap_SubsequentEventTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xml:lang="en-US" id="id_1446237_506663_1_1">Subsequent Event Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xml:lang="en-US" id="id_1446237_506663_2_1">Subsequent Event Type</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeAxis_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xml:lang="en-US" id="id_1446237_510912_1_1">Subsequent Event Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xml:lang="en-US" id="id_1446237_510912_2_1">Subsequent Event Type [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventTypeDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_SupplementalCashFlowElementsAbstract" xlink:label="us-gaap_SupplementalCashFlowElementsAbstract"/>
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    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_SwinglineLoansMember" xlink:label="pten_SwinglineLoansMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_SwinglineLoansMember_lbl" xml:lang="en-US" id="id_1446237_531843_3_1">Swingline Loans</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_SwinglineLoansMember_lbl" xml:lang="en-US" id="id_1446237_531843_1_1">Swingline Loans [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_SwinglineLoansMember_lbl" xml:lang="en-US" id="id_1446237_531843_2_1">Swing Line Facility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_SwinglineLoansMember" xlink:to="pten_SwinglineLoansMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TaxesPayableCurrent" xlink:label="us-gaap_TaxesPayableCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TaxesPayableCurrent_lbl" xml:lang="en-US" id="id_1446237_513000_1_1">Taxes Payable Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TaxesPayableCurrent_lbl" xml:lang="en-US" id="id_1446237_513000_2_1">Property, sales, use and other taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxesPayableCurrent" xlink:to="us-gaap_TaxesPayableCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_TermLoanFacilityMember" xlink:label="pten_TermLoanFacilityMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_TermLoanFacilityMember_lbl" xml:lang="en-US" id="id_1446237_531011_3_1">Term Loan Facility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_TermLoanFacilityMember_lbl" xml:lang="en-US" id="id_1446237_531011_1_1">Term Loan Facility [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_TermLoanFacilityMember_lbl" xml:lang="en-US" id="id_1446237_531011_2_1">Term Loan Facility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_TermLoanFacilityMember" xlink:to="pten_TermLoanFacilityMember_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_TermLoanMember" xlink:label="pten_TermLoanMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_TermLoanMember_lbl" xml:lang="en-US" id="id_1446237_534319_3_1">Term Loan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_TermLoanMember_lbl" xml:lang="en-US" id="id_1446237_534319_1_1">Term Loan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_TermLoanMember_lbl" xml:lang="en-US" id="id_1446237_534319_2_1">Term Loan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_TermLoanMember" xlink:to="pten_TermLoanMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_TradingSymbol_lbl" xml:lang="en-US" id="id_1446237_497703_1_1">Trading Symbol</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_TradingSymbol_lbl" xml:lang="en-US" id="id_1446237_497703_2_1">Trading Symbol</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_TradingSymbol" xlink:to="dei_TradingSymbol_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="us-gaap_TreasuryStockMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TreasuryStockMember_lbl" xml:lang="en-US" id="id_1446237_502884_1_1">Treasury Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TreasuryStockMember_lbl" xml:lang="en-US" id="id_1446237_502884_2_1">Treasury Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TreasuryStockMember" xlink:to="us-gaap_TreasuryStockMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TreasuryStockShares" xlink:label="us-gaap_TreasuryStockShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TreasuryStockShares_lbl" xml:lang="en-US" id="id_1446237_503408_1_1">Treasury Stock Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TreasuryStockShares_lbl" xml:lang="en-US" id="id_1446237_503408_2_1">Treasury stock, shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TreasuryStockShares" xlink:to="us-gaap_TreasuryStockShares_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TreasuryStockSharesAcquired" xlink:label="us-gaap_TreasuryStockSharesAcquired"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TreasuryStockSharesAcquired_lbl" xml:lang="en-US" id="id_1446237_507013_1_1">Treasury Stock Shares Acquired</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TreasuryStockSharesAcquired_lbl" xml:lang="en-US" id="id_1446237_507013_2_1">Treasury stock shares acquired</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TreasuryStockSharesAcquired" xlink:to="us-gaap_TreasuryStockSharesAcquired_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="us-gaap_TreasuryStockValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TreasuryStockValue_lbl" xml:lang="en-US" id="id_1446237_509721_1_1">Treasury Stock Value</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_TreasuryStockValue_lbl" xml:lang="en-US" id="id_1446237_509721_8_1">Treasury stock, at cost, 38,784,362 shares and 38,146,738 shares at March 31, 2013 and December 31, 2012, respectively</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TreasuryStockValue" xlink:to="us-gaap_TreasuryStockValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod" xlink:label="us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TreasuryStockValueAcquiredCostMethod_lbl" xml:lang="en-US" id="id_1446237_504960_1_1">Treasury Stock Value Acquired Cost Method</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TreasuryStockValueAcquiredCostMethod_lbl" xml:lang="en-US" id="id_1446237_504960_2_1">Purchase price for treasury stock acquired</label>
    <label xlink:type="resource" xlink:role="http://xbrl.us/us-gaap/role/label/negated" xlink:label="us-gaap_TreasuryStockValueAcquiredCostMethod_lbl" xml:lang="en-US" id="id_1446237_504960_8_1">Purchase of treasury stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TreasuryStockValueAcquiredCostMethod" xlink:to="us-gaap_TreasuryStockValueAcquiredCostMethod_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_TypeOfOperationsAxis" xlink:label="pten_TypeOfOperationsAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_TypeOfOperationsAxis_lbl" xml:lang="en-US" id="id_1446237_530504_3_1">Type of Operations [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_TypeOfOperationsAxis_lbl" xml:lang="en-US" id="id_1446237_530504_1_1">Type Of Operations [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_TypeOfOperationsAxis_lbl" xml:lang="en-US" id="id_1446237_530504_2_1">Type of Operations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_TypeOfOperationsAxis" xlink:to="pten_TypeOfOperationsAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_TypeOfOperationsDomain" xlink:label="pten_TypeOfOperationsDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_TypeOfOperationsDomain_lbl" xml:lang="en-US" id="id_1446237_530749_3_1">Type of Operations [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_TypeOfOperationsDomain_lbl" xml:lang="en-US" id="id_1446237_530749_1_1">Type Of Operations [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_TypeOfOperationsDomain_lbl" xml:lang="en-US" id="id_1446237_530749_2_1">Type of Operations [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_TypeOfOperationsDomain" xlink:to="pten_TypeOfOperationsDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_UnrecognizedDeferredTaxLiabilityAssociatedWithIndefinitelyReinvestedUndistributedEarnings" xlink:label="pten_UnrecognizedDeferredTaxLiabilityAssociatedWithIndefinitelyReinvestedUndistributedEarnings"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_UnrecognizedDeferredTaxLiabilityAssociatedWithIndefinitelyReinvestedUndistributedEarnings_lbl" xml:lang="en-US" id="id_1446237_604949_3_1">Unrecognized Deferred Tax Liability Associated With Indefinitely Reinvested Undistributed Earnings</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_UnrecognizedDeferredTaxLiabilityAssociatedWithIndefinitelyReinvestedUndistributedEarnings_lbl" xml:lang="en-US" id="id_1446237_604949_1_1">Unrecognized Deferred Tax Liability Associated With Indefinitely Reinvested Undistributed Earnings</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_UnrecognizedDeferredTaxLiabilityAssociatedWithIndefinitelyReinvestedUndistributedEarnings_lbl" xml:lang="en-US" id="id_1446237_604949_2_1">Unrecognized deferred tax liability associated with undistributed foreign earnings</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_UnrecognizedDeferredTaxLiabilityAssociatedWithIndefinitelyReinvestedUndistributedEarnings" xlink:to="pten_UnrecognizedDeferredTaxLiabilityAssociatedWithIndefinitelyReinvestedUndistributedEarnings_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_UnrecognizedShareBasedCompensationExpenseLineItems" xlink:label="pten_UnrecognizedShareBasedCompensationExpenseLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_UnrecognizedShareBasedCompensationExpenseLineItems_lbl" xml:lang="en-US" id="id_1446237_518883_3_1">Unrecognized Share Based Compensation Expense [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_UnrecognizedShareBasedCompensationExpenseLineItems_lbl" xml:lang="en-US" id="id_1446237_518883_1_1">Unrecognized Share Based Compensation Expense [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_UnrecognizedShareBasedCompensationExpenseLineItems_lbl" xml:lang="en-US" id="id_1446237_518883_2_1">Unrecognized Share Based Compensation Expense [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_UnrecognizedShareBasedCompensationExpenseLineItems" xlink:to="pten_UnrecognizedShareBasedCompensationExpenseLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="pten-20130331.xsd#pten_UnrecognizedShareBasedCompensationExpenseTable" xlink:label="pten_UnrecognizedShareBasedCompensationExpenseTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="pten_UnrecognizedShareBasedCompensationExpenseTable_lbl" xml:lang="en-US" id="id_1446237_541709_3_1">Unrecognized Share Based Compensation Expense [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="pten_UnrecognizedShareBasedCompensationExpenseTable_lbl" xml:lang="en-US" id="id_1446237_541709_1_1">Unrecognized Share Based Compensation Expense [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="pten_UnrecognizedShareBasedCompensationExpenseTable_lbl" xml:lang="en-US" id="id_1446237_541709_2_1">Unrecognized Share Based Compensation Expense [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="pten_UnrecognizedShareBasedCompensationExpenseTable" xlink:to="pten_UnrecognizedShareBasedCompensationExpenseTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount" xlink:label="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_lbl" xml:lang="en-US" id="id_1446237_504338_1_1">Unrecorded Unconditional Purchase Obligation Balance Sheet Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_lbl" xml:lang="en-US" id="id_1446237_504338_2_1">Current obligation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount" xlink:to="us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear" xlink:label="us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_lbl" xml:lang="en-US" id="id_1446237_507453_1_1">Unrecorded Unconditional Purchase Obligation Due In Remainder Of Fiscal Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_lbl" xml:lang="en-US" id="id_1446237_507453_2_1">Obligation for remainder of the year</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear" xlink:to="us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:label="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_lbl" xml:lang="en-US" id="id_1446237_510509_1_1">Weighted Average Number Diluted Shares Outstanding Adjustment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_lbl" xml:lang="en-US" id="id_1446237_510509_2_1">Add dilutive effect of potential common shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:to="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xml:lang="en-US" id="id_1446237_507210_1_1">Weighted Average Number Of Diluted Shares Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xml:lang="en-US" id="id_1446237_507210_2_1">Diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xml:lang="en-US" id="id_1446237_507210_6_1">Weighted average number of diluted common shares outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_lbl" xml:lang="en-US" id="id_1446237_507577_1_1">Weighted Average Number Of Shares Outstanding [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_lbl" xml:lang="en-US" id="id_1446237_507577_2_1">Weighted average number of common shares outstanding:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xml:lang="en-US" id="id_1446237_510080_1_1">Weighted Average Number Of Shares Outstanding Basic</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xml:lang="en-US" id="id_1446237_510080_2_1">Basic</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xml:lang="en-US" id="id_1446237_510080_12_1">Weighted average number of common shares outstanding, excluding non-vested shares of restricted stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WorkersCompensationLiabilityCurrent" xlink:label="us-gaap_WorkersCompensationLiabilityCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WorkersCompensationLiabilityCurrent_lbl" xml:lang="en-US" id="id_1446237_502947_1_1">Workers Compensation Liability Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_WorkersCompensationLiabilityCurrent_lbl" xml:lang="en-US" id="id_1446237_502947_2_1">Workers' compensation liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WorkersCompensationLiabilityCurrent" xlink:to="us-gaap_WorkersCompensationLiabilityCurrent_lbl"/>
  </labelLink>
</linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>10
<FILENAME>pten-20130331_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="US-ASCII"?>
<!-- RR Donnelley Xcelerate Taxonomy Presentation Linkbase, based on XBRL 2.1  http://www.edgar-online.com/ -->
<!-- Version: 6.20.1 -->
<!-- Round: 8 -->
<!-- Creation date: 2013-04-30T10:36:06Z -->
<!-- Copyright (c) 2005-2013 R.R. Donnelley & Sons Company All Rights Reserved. -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
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  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#Role_StatementOfFinancialPositionClassified" roleURI="http://www.patenergy.com/taxonomy/role/StatementOfFinancialPositionClassified"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#Role_StatementOfFinancialPositionClassifiedParen" roleURI="http://www.patenergy.com/taxonomy/role/StatementOfFinancialPositionClassifiedParenthetical"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#Role_StatementOfIncomeAlternative" roleURI="http://www.patenergy.com/taxonomy/role/StatementOfIncomeAlternative"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#Role_StatementOfOtherComprehensiveIncome" roleURI="http://www.patenergy.com/taxonomy/role/StatementOfOtherComprehensiveIncome"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#Role_StatementOfOtherComprehensiveIncomeParen" roleURI="http://www.patenergy.com/taxonomy/role/StatementOfOtherComprehensiveIncomeParenthetical"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#Role_ci-StatementOfShareholdersEquityAndOtherComprehensiveIncome" roleURI="http://www.patenergy.com/taxonomy/role/StatementOfShareholdersEquityAndOtherComprehensiveIncome"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#Role_StatementOfCashFlowsIndirect" roleURI="http://www.patenergy.com/taxonomy/role/StatementOfCashFlowsIndirect"/>
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  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureCalculationOfBasicAndDilutedNetIncomePerShare" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureCalculationOfBasicAndDilutedNetIncomePerShare"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureWeightedAverageAssumptionsUsedToEstimateGrantDateFairValuesForStockOptionsGranted" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureWeightedAverageAssumptionsUsedToEstimateGrantDateFairValuesForStockOptionsGranted"/>
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  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureRestrictedStockActivity" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureRestrictedStockActivity"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureRestrictedStockUnitActivity" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureRestrictedStockUnitActivity"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureStockbasedCompensationAdditionalInformation" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureStockbasedCompensationAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureStockSettledPerformanceUnits" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureStockSettledPerformanceUnits"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureFairValueOfStockSettledPerformanceUnits" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureFairValueOfStockSettledPerformanceUnits"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureCompensationExpenseAssociatedWithStockSettledPerformanceUnits" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureCompensationExpenseAssociatedWithStockSettledPerformanceUnits"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosurePropertyAndEquipment" roleURI="http://www.patenergy.com/taxonomy/role/DisclosurePropertyAndEquipment"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureBusinessSegmentsAdditionalInformation" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureBusinessSegmentsAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureBusinessSegmentsRevenues" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureBusinessSegmentsRevenues"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureBusinessSegmentsIncomelossFromContinuingOperationsBeforeIncomeTaxes" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureBusinessSegmentsIncomelossFromContinuingOperationsBeforeIncomeTaxes"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureBusinessSegmentsAssets" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureBusinessSegmentsAssets"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureGoodwillByOperatingSegment" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureGoodwillByOperatingSegment"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureGoodwillAndIntangibleAssetsAdditionalInformation" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureGrossCarryingAmountAndAccumulatedAmortizationOfIntangibleAssets" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureGrossCarryingAmountAndAccumulatedAmortizationOfIntangibleAssets"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureSummaryOfAccruedExpenses" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureSummaryOfAccruedExpenses"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureAccruedExpensesAdditionalInformation" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureAccruedExpensesAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureChangesToCompanysAssetRetirementObligations" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureChangesToCompanysAssetRetirementObligations"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureLongTermDebtAdditionalInformation" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureLongTermDebtAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureScheduleOfPrincipalRepaymentRequirementsOfLongTermDebt" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureScheduleOfPrincipalRepaymentRequirementsOfLongTermDebt"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureCommitmentsContingenciesAndOtherMattersAdditionalInformation" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureCommitmentsContingenciesAndOtherMattersAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureCashDividends" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureCashDividends"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureStockholdersEquityAdditionalInformation" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureStockholdersEquityAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="pten-20130331.xsd#DisclosureIncomeTaxesAdditionalInformation" roleURI="http://www.patenergy.com/taxonomy/role/DisclosureIncomeTaxesAdditionalInformation"/>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EMPAC">
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          <div>Mar. 31, 2013</div>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsLineItems', window );"><strong>Schedule of Share based Compensation Arrangements by Share based Payment Award, Performance Options [Line Items]</strong></a></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_PerformanceAwardTargetNumberOfShares', window );">Target number of shares</a></td>
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                <p>Performance award, target number of shares.</p>
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                <p>No definition available.</p>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EALAC">
      <tr>
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          <div style="width: 200px;"><strong>Schedule of Principal Repayment Requirements of Long Term Debt (Detail) (USD $)<br>In Thousands, unless otherwise specified</strong></div>
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          <div>Mar. 31, 2013</div>
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          <div>Dec. 31, 2012</div>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_LongTermDebtMaturitiesRepaymentsOfPrincipalLineItems', window );"><strong>Long Term Debt Maturities Repayments Of Principal [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo', window );">2014</a></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive', window );">Thereafter</a></td>
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                <p>Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.</p>
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                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 942<br><br> -SubTopic 210<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.9-03.16)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6876686&amp;loc=d3e534808-122878<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 16<br><br> -Article 9<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 16<br><br> -Article 7<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 20, 22<br><br> -Article 5<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.22)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 944<br><br> -SubTopic 210<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.7-03.16)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6879938&amp;loc=d3e572229-122910<br><br><br><br></p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 470<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6802200&amp;loc=d3e1835-112601<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 47<br><br> -Paragraph 10<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
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                <p>Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 470<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6802200&amp;loc=d3e1835-112601<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 47<br><br> -Paragraph 10<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
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                <p>Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 470<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6802200&amp;loc=d3e1835-112601<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 47<br><br> -Paragraph 10<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
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                <p>Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 470<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6802200&amp;loc=d3e1835-112601<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 47<br><br> -Paragraph 10<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
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                <p>Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 470<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6802200&amp;loc=d3e1835-112601<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 47<br><br> -Paragraph 10<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
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                <p>Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Contract Term</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_ContractTerm</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:durationItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_GoodwillAndIntangibleAssetsDisclosureLineItems">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_GoodwillAndIntangibleAssetsDisclosureLineItems</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AmortizationOfIntangibleAssets">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 142<br><br> -Paragraph 45<br><br> -Subparagraph a(2)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 30<br><br> -Section 45<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6388964&amp;loc=d3e16225-109274<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 30<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (a)(2)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7658586&amp;loc=d3e16323-109275<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_AmortizationOfIntangibleAssets</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_FiniteLivedIntangibleAssetUsefulLife">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_FiniteLivedIntangibleAssetUsefulLife</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:durationItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The accumulated impairment losses related to goodwill as of the balance sheet date.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (a,h)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=14024403&amp;loc=d3e13816-109267<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_GoodwillImpairedAccumulatedImpairmentLoss</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
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                </table>
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  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0E5AAE">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Commitments, Contingencies and Other Matters - Additional Information (Detail) (USD $)<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_CommitmentsAndContingenciesDisclosureLineItems', window );"><strong>Commitments and Contingencies Disclosure [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LettersOfCreditOutstandingAmount', window );">Letters of credit, collateral for retrospective premiums and retained losses</a></td>
        <td class="nump">$ 39,800,000<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SignificantPurchaseCommitmentRemainingMinimumAmountCommitted', window );">Commitments to purchase major equipment</a></td>
        <td class="nump">128,000,000<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount', window );">Current obligation</a></td>
        <td class="nump">35,000,000<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear', window );">Obligation for remainder of the year</a></td>
        <td class="nump">7,200,000<span></span></td>
      </tr>
      <tr class="rh">
        <td class="pl" style="border-bottom: 0px;" valign="top">
          <div class="a">Non Revolving Senior Secured Term Loan</div>
        </td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_CommitmentsAndContingenciesDisclosureLineItems', window );"><strong>Commitments and Contingencies Disclosure [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_AdvancesToNonAffiliates', window );">Advance to non-affiliates</a></td>
        <td class="nump">12,000,000<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_NotesReceivableInterestRate', window );">Notes receivable interest rate</a></td>
        <td class="nump">5.00%<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NotesAndLoansReceivableGrossNoncurrent', window );">Notes receivable</a></td>
        <td class="nump">11,800,000<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ProceedsFromCollectionOfNotesReceivable', window );">Repayment of notes receivable</a></td>
        <td class="nump">531,000<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NotesAndLoansReceivableNetCurrent', window );">Notes receivable outstanding</a></td>
        <td class="nump">$ 11,200,000<span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_AdvancesToNonAffiliates">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Advances to Non Affiliates</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_AdvancesToNonAffiliates</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                  <tr>
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                    <td>instant</td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_CommitmentsAndContingenciesDisclosureLineItems</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
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                    <td>xbrli:stringItemType</td>
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                    <td>na</td>
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                    <td>duration</td>
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            </div>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_NotesReceivableInterestRate">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Notes Receivable Interest Rate</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_NotesReceivableInterestRate</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
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                    <td>num:percentItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LettersOfCreditOutstandingAmount">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LettersOfCreditOutstandingAmount</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
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              </div>
            </div>
          </td>
        </tr>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NotesAndLoansReceivableGrossNoncurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date(s) more than one year from the balance sheet date. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.17)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 17<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_NotesAndLoansReceivableGrossNoncurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
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                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NotesAndLoansReceivableNetCurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money within one year from the balance sheet date (or the normal operating cycle, whichever is longer), net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 310<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 9<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6375948&amp;loc=d3e4531-111522<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 1<br><br> -Subparagraph (c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6676-107765<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.3)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 3<br><br> -Article 5<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 43<br><br> -Section A<br><br> -Paragraph 4<br><br> -Chapter 3<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_NotesAndLoansReceivableNetCurrent</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
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          </td>
        </tr>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromCollectionOfNotesReceivable">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The cash inflow associated with principal collections from a borrowing supported by a written promise to pay an obligation.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 16<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Investing Activities<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6516133<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 15<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 12<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3179-108585<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ProceedsFromCollectionOfNotesReceivable</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The floor amount as of the balance sheet date that the entity must expend to satisfy the terms of disclosed arrangements (excluding long-term commitments) in which the entity has agreed to expend funds to procure goods or services from one or more suppliers, other than under a long-term purchase commitment or an unconditional purchase obligation.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 17<br><br> -Article 9<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 942<br><br> -SubTopic 210<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.9-03.17)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6876686&amp;loc=d3e534808-122878<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.25)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 944<br><br> -SubTopic 210<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.7-03.(a)(19))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6879938&amp;loc=d3e572229-122910<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 25<br><br> -Article 5<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 19<br><br> -Article 7<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
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                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Balance Type:</strong></td>
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                <p>Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 440<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 4<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6394976&amp;loc=d3e25336-109308<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 47<br><br> -Paragraph 7<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
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                <table border="0" cellpadding="0" cellspacing="0">
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                    <td>us-gaap_</td>
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                    <td>credit</td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the remainder of the fiscal year following the latest fiscal year ended.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EJUAE">
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          <div style="width: 200px;"><strong>Business Segments - Assets (Detail) (USD $)<br>In Thousands, unless otherwise specified</strong></div>
        </th>
        <th class="th" colspan="2">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th" colspan="2">
          <div>Dec. 31, 2012</div>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SegmentReportingAssetReconcilingItemLineItems', window );"><strong>Segment Reporting, Asset Reconciling Item [Line Items]</strong></a></td>
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        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_Assets', window );">Assets</a></td>
        <td class="nump">$ 4,657,232<span></span></td>
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        <td class="nump">$ 4,556,911<span></span></td>
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          <div class="a">Operating Segments | Contract Drilling</div>
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        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SegmentReportingAssetReconcilingItemLineItems', window );"><strong>Segment Reporting, Asset Reconciling Item [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="nump">3,607,349<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">3,538,289<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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      <tr class="rh">
        <td class="pl" style="border-bottom: 0px;" valign="top">
          <div class="a">Operating Segments | Pressure Pumping</div>
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        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SegmentReportingAssetReconcilingItemLineItems', window );"><strong>Segment Reporting, Asset Reconciling Item [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_Assets', window );">Assets</a></td>
        <td class="nump">802,050<span></span></td>
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        <td class="nump">784,128<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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      <tr class="rh">
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          <div class="a">Operating Segments | Oil and Natural Gas</div>
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        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_Assets', window );">Assets</a></td>
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        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_Assets', window );">Assets</a></td>
        <td class="nump">$ 192,621<span></span></td>
        <td class="fn" style="border-bottom: 0px;"><sup>[1]</sup></td>
        <td class="nump">$ 180,306<span></span></td>
        <td class="fn" style="border-bottom: 0px;"><sup>[1]</sup></td>
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              <td style="vertical-align: top;" valign="top">[1]</td>
              <td style="vertical-align: top;" valign="top">Corporate and other assets primarily include cash on hand and certain deferred tax assets.</td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 12<br><br> -Article 7<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Concepts (CON)<br><br> -Number 6<br><br> -Paragraph 25<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 18<br><br> -Article 5<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.18)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_Assets</nobr></td>
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                    <td>xbrli:monetaryItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
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                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_SegmentReportingAssetReconcilingItemLineItems</nobr></td>
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                    <td>xbrli:stringItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                    <td>duration</td>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0E2KAE">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Calculation of Basic and Diluted Net Income Per Share (Detail) (USD $)<br>In Thousands, except Per Share data, unless otherwise specified</strong></div>
        </th>
        <th class="th" colspan="2">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th">
          <div>Mar. 31, 2012</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_EarningsPerShareBasicAbstract', window );"><strong>BASIC EPS:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ProfitLoss', window );">Net income</a></td>
        <td class="nump">$ 56,230<span></span></td>
        <td class="nump">$ 97,274<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_IncomeLossFromContinuingOperationsAllocableToNonVestedRestrictedShares', window );">Adjust for income attributed to holders of non-vested restricted stock</a></td>
        <td class="num">(482)<span></span></td>
        <td class="num">(742)<span></span></td>
      </tr>
      <tr class="rou">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic', window );">Income attributed to common stockholders</a></td>
        <td class="nump">55,748<span></span></td>
        <td class="nump">96,532<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic', window );">Weighted average number of common shares outstanding, excluding non-vested shares of restricted stock</a></td>
        <td class="nump">144,827<span></span></td>
        <td class="nump">154,625<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_EarningsPerShareBasic', window );">Basic net income per common share</a></td>
        <td class="nump">$ 0.38<span></span></td>
        <td class="nump">$ 0.62<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_EarningsPerShareDilutedAbstract', window );"><strong>DILUTED EPS:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic', window );">Income attributed to common stockholders</a></td>
        <td class="nump">55,748<span></span></td>
        <td class="nump">96,532<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_IncrementalIncomeLossRelatedToPotentialCommonShares', window );">Add incremental earnings related to potential common shares</a></td>
        <td class="nump">6<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="rou">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted', window );">Adjusted income attributed to common stockholders</a></td>
        <td class="nump">$ 55,754<span></span></td>
        <td class="nump">$ 96,532<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic', window );">Weighted average number of common shares outstanding, excluding non-vested shares of restricted stock</a></td>
        <td class="nump">144,827<span></span></td>
        <td class="nump">154,625<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment', window );">Add dilutive effect of potential common shares</a></td>
        <td class="nump">1,956<span></span></td>
        <td class="nump">776<span></span></td>
      </tr>
      <tr class="reu">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding', window );">Weighted average number of diluted common shares outstanding</a></td>
        <td class="nump">146,783<span></span></td>
        <td class="nump">155,401<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_EarningsPerShareDiluted', window );">Diluted net income per common share</a></td>
        <td class="nump">$ 0.38<span></span></td>
        <td class="nump">$ 0.62<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount', window );">Potentially dilutive securities excluded as anti-dilutive</a></td>
        <td class="nump">1,874<span></span></td>
        <td class="nump">3,229<span></span></td>
      </tr>
    </table>
    <div style="display: none;">
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Income Loss From Continuing Operations Allocable To Non Vested Restricted Shares</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_IncomeLossFromContinuingOperationsAllocableToNonVestedRestrictedShares</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Incremental Income (Loss) Related to Potential Common Shares</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_IncrementalIncomeLossRelatedToPotentialCommonShares</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                    <td>credit</td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Emerging Issues Task Force (EITF)<br><br> -Number 07-4<br><br> -Paragraph 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Diluted Earnings Per Share<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6510752<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Contingent Stock Agreement<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6508534<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Antidilution<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6505113<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 171<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 40<br><br> -Subparagraph c<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6371337&amp;loc=d3e3550-109257<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 13, 14<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                    <td><strong> Period Type:</strong></td>
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          </td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_EarningsPerShareBasic">
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Paragraph 21<br><br> -Article 9<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 36, 37, 38<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6371337&amp;loc=d3e3550-109257<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 942<br><br> -SubTopic 225<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.9-04.23)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6879574&amp;loc=d3e536633-122882<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.21)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 944<br><br> -SubTopic 225<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.7-04.19)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6879464&amp;loc=d3e573970-122913<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Emerging Issues Task Force (EITF)<br><br> -Number 07-4<br><br> -Paragraph 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 55<br><br> -Paragraph 52<br><br> -URI http://asc.fasb.org/extlink&amp;oid=16381557&amp;loc=d3e4984-109258<br><br><br><br>Reference 9: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Paragraph 18<br><br> -Article 7<br><br><br><br>Reference 10: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7655603&amp;loc=d3e1252-109256<br><br><br><br>Reference 11: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 20<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                  <tr>
                    <td><strong> Name:</strong></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
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          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Paragraph 18<br><br> -Article 7<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 11, 12, 36<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Emerging Issues Task Force (EITF)<br><br> -Number 07-4<br><br> -Paragraph 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 20<br><br> -Article 5<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.21)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7655603&amp;loc=d3e1252-109256<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Paragraph 21<br><br> -Article 9<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_EarningsPerShareDiluted</nobr></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_EarningsPerShareDilutedAbstract</nobr></td>
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 11<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7655603&amp;loc=d3e1377-109256<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 9<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic</nobr></td>
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 16<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7655603&amp;loc=d3e1505-109256<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 11<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7655603&amp;loc=d3e1377-109256<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 11, 12<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph A1, A4, A5<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 19<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7656940&amp;loc=SL4569616-111683<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 29<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 5<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 55<br><br> -Paragraph 4K<br><br> -URI http://asc.fasb.org/extlink&amp;oid=18733213&amp;loc=SL4591552-111686<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1A<br><br> -Subparagraph (a),(c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=18733093&amp;loc=SL4573702-111684<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 38<br><br> -Subparagraph c(1)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 38<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 9: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 55<br><br> -Paragraph 4J<br><br> -URI http://asc.fasb.org/extlink&amp;oid=18733213&amp;loc=SL4591551-111686<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ProfitLoss</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6371337&amp;loc=d3e3550-109257<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Emerging Issues Task Force (EITF)<br><br> -Number 07-4<br><br> -Paragraph 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 40<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                    <td><strong> Name:</strong></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 40<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 8<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6371337&amp;loc=d3e3550-109257<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Emerging Issues Task Force (EITF)<br><br> -Number 07-4<br><br> -Paragraph 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 16<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7655603&amp;loc=d3e1505-109256<br><br><br><br></p>
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                <p>Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 40<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 10<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7655603&amp;loc=d3e1448-109256<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6371337&amp;loc=d3e3550-109257<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 8<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Emerging Issues Task Force (EITF)<br><br> -Number 07-4<br><br> -Paragraph 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 171<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Weighted-Average Number of Common Shares Outstanding<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6528421<br><br><br><br></p>
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                <p>Aggregate dividends declared during the period for each share of common stock outstanding.</p>
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                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>num:perShareItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Date the declared dividend will be paid, in CCYY-MM-DD format.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 3<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6367179&amp;loc=d3e4304-108586<br><br><br><br></p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Date the dividend to be paid was declared, in CCYY-MM-DD format.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 3<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6367179&amp;loc=d3e4304-108586<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 32<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                    <td><nobr>us-gaap_DividendsPayableDateDeclaredDayMonthAndYear</nobr></td>
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          <td>
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                <p>Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                <p>The amount authorized by an entity's Board of Directors under a stock repurchase plan.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                <p>Number of shares that have been repurchased during the period and are being held in treasury.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 29, 30<br><br> -Article 5<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 10<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Article 3<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21463-112644<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.3-04)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 30<br><br> -Section 45<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6405813&amp;loc=d3e23239-112655<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 10<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 43<br><br> -Section B<br><br> -Paragraph 7<br><br> -Subparagraph b<br><br> -Chapter 1<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Article 3<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21463-112644<br><br><br><br></p>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
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          <div style="width: 200px;"><strong>Property and Equipment (Tables)<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
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          <div>Mar. 31, 2013</div>
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<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Property and
equipment consisted of the following at March&#xA0;31, 2013 and
December&#xA0;31, 2012 (in thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="72%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>March&#xA0;31,</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>December&#xA0;31,</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Equipment</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,545,029</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,387,490</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Oil and natural gas
properties</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">164,824</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">156,834</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Buildings</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">67,585</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">66,490</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Land</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">11,899</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">10,413</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
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<tr bgcolor="#CCEEFF">
<td valign="top"></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,789,337</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,621,227</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
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<tr>
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<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Less accumulated
depreciation and depletion</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(2,106,587</font></td>
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<td valign="bottom"><font size="1">&#xA0;</font></td>
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<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(2,005,844</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
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<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
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<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Property and equipment,
net</font></p>
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<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">3,682,750</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
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<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 13<br><br> -Subparagraph b<br><br> -Article 5<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 5<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 360<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6391035&amp;loc=d3e2868-110229<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.13)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br></p>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EANAC">
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          <div style="width: 200px;"><strong>Summary of Accrued Expenses (Detail) (USD $)<br>In Thousands, unless otherwise specified</strong></div>
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          <div>Mar. 31, 2013</div>
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        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="nump">7,653<span></span></td>
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        <td class="nump">$ 141,517<span></span></td>
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                <p>Accrued Salaries, Wages, Payroll Taxes and Benefits, Current</p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverage's to employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 43<br><br> -Section A<br><br> -Paragraph 7<br><br> -Chapter 3<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.20)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 20<br><br> -Article 5<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 6<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6911-107765<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 8<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6935-107765<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Current Liabilities<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6509677<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 43<br><br> -Section A<br><br> -Paragraph 8<br><br> -Chapter 3<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
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                <p>Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
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                <p>The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 43<br><br> -Section A<br><br> -Paragraph 7, 8<br><br> -Chapter 3<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 605<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SAB TOPIC 13.A.4(a).Q1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6600647&amp;loc=d3e214044-122780<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 8<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6935-107765<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Staff Accounting Bulletin (SAB)<br><br> -Number Topic 13<br><br> -Section A<br><br><br><br></p>
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                <p>Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 43<br><br> -Section A<br><br> -Paragraph 7<br><br> -Chapter 3<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.20)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 20<br><br> -Article 5<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 9<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e7018-107765<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 8<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6935-107765<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Current Liabilities<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6509677<br><br><br><br></p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 43<br><br> -Section A<br><br> -Paragraph 7<br><br> -Chapter 3<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.20)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 20<br><br> -Article 5<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 6<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6911-107765<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 8<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6935-107765<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Current Liabilities<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6509677<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 9<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e7018-107765<br><br><br><br></p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.19,20)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 20<br><br> -Article 5<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 19<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                <p>Carrying value as of the balance sheet date of obligations and payables pertaining to claims incurred of a workers compensation nature. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 20<br><br> -Article 5<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.20)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EALAC">
      <tr>
        <th class="tl" colspan="1" rowspan="1">
          <div style="width: 200px;"><strong>Property and Equipment (Detail) (USD $)<br>In Thousands, unless otherwise specified</strong></div>
        </th>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th">
          <div>Dec. 31, 2012</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PropertyPlantAndEquipmentLineItems', window );"><strong>Property, Plant and Equipment [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_MachineryAndEquipmentGross', window );">Equipment</a></td>
        <td class="nump">$ 5,545,029<span></span></td>
        <td class="nump">$ 5,387,490<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OilAndGasPropertySuccessfulEffortMethodGross', window );">Oil and natural gas properties</a></td>
        <td class="nump">164,824<span></span></td>
        <td class="nump">156,834<span></span></td>
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      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_BuildingsAndImprovementsGross', window );">Buildings</a></td>
        <td class="nump">67,585<span></span></td>
        <td class="nump">66,490<span></span></td>
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      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_Land', window );">Land</a></td>
        <td class="nump">11,899<span></span></td>
        <td class="nump">10,413<span></span></td>
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      <tr class="rou">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PropertyPlantAndEquipmentGross', window );">Property, Plant and Equipment, Gross, Total</a></td>
        <td class="nump">5,789,337<span></span></td>
        <td class="nump">5,621,227<span></span></td>
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      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment', window );">Less accumulated depreciation and depletion</a></td>
        <td class="num">(2,106,587)<span></span></td>
        <td class="num">(2,005,844)<span></span></td>
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      <tr class="rou">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PropertyPlantAndEquipmentNet', window );">Property and equipment, net</a></td>
        <td class="nump">$ 3,682,750<span></span></td>
        <td class="nump">$ 3,615,383<span></span></td>
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    <div style="display: none;">
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 14<br><br> -Article 5<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 5<br><br> -Subparagraph c<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 5<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.14)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 360<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6391035&amp;loc=d3e2868-110229<br><br><br><br></p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 5<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 360<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6391035&amp;loc=d3e2868-110229<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 4<br><br> -Subparagraph (f)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6812-107765<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Carrying amount as of the balance sheet date of real estate held for productive use. This excludes land held for sale.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 4<br><br> -Subparagraph (e)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6812-107765<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.13)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_Land</nobr></td>
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                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td>xbrli:monetaryItemType</td>
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                    <td>debit</td>
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                    <td>instant</td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_MachineryAndEquipmentGross">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Gross amount, as of the balance sheet date, of long-lived, depreciable assets used in the production process to produce goods and services.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 5<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 360<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6391035&amp;loc=d3e2868-110229<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 4<br><br> -Subparagraph (f)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6812-107765<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_MachineryAndEquipmentGross</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
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                </table>
              </div>
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        </tr>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OilAndGasPropertySuccessfulEffortMethodGross">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Oil and Gas properties, gross, carried under the successful effort method.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 932<br><br> -SubTopic 235<br><br> -Section 50<br><br> -Paragraph 13<br><br> -URI http://asc.fasb.org/extlink&amp;oid=8451039&amp;loc=d3e61901-109447<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 932<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.4-10.(b))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=21918352&amp;loc=d3e511914-122862<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_OilAndGasPropertySuccessfulEffortMethodGross</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                    <td>instant</td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PropertyPlantAndEquipmentGross">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 5<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 360<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6391035&amp;loc=d3e2868-110229<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.13)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_PropertyPlantAndEquipmentGross</nobr></td>
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                    <td>instant</td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_PropertyPlantAndEquipmentLineItems</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PropertyPlantAndEquipmentNet">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 8<br><br> -Article 7<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 12<br><br> -Paragraph 5<br><br> -Subparagraph b, c<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 360<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6391035&amp;loc=d3e2868-110229<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.13)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 13<br><br> -Subparagraph a<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_PropertyPlantAndEquipmentNet</nobr></td>
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                    <td>xbrli:monetaryItemType</td>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EJCAE">
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          <div style="width: 200px;"><strong>Restricted Stock Unit Activity (Detail) (Restricted Stock Units (RSUs), USD $)<br></strong></div>
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        <th class="th" colspan="1">3 Months Ended</th>
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          <div>Mar. 31, 2013</div>
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          <div class="a">Restricted Stock Units (RSUs)</div>
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        <td class="text">&#xA0;<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward', window );"><strong>Shares</strong></a></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod', window );">Granted</a></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod', window );">Vested</a></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber', window );">Outstanding at end of period</a></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract', window );"><strong>Weighted Average Grant Date Fair Value</strong></a></td>
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                    <td><strong> Name:</strong></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(1)(iv)(3)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(e)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod</nobr></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)(iii)(3)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                    <td><strong> Name:</strong></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)(iii)(1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(c)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
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                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod</nobr></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)(iii)(1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph c(1)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(c)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)(i)-(ii)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(b)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(a)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber</nobr></td>
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward</nobr></td>
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                    <td>duration</td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)(i)-(ii)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(b)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(a)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue</nobr></td>
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)(iii)(2)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(d)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod</nobr></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)(iii)(2)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(d)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EIJAC">
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        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Changes to Company's Asset Retirement Obligations (Detail) (USD $)<br>In Thousands, unless otherwise specified</strong></div>
        </th>
        <th class="th" colspan="2">3 Months Ended</th>
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      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th">
          <div>Mar. 31, 2012</div>
        </th>
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      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_ReconciliationOfChangesInAssetRetirementObligationsLineItems', window );"><strong>Reconciliation of Changes in Asset Retirement Obligations [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AssetRetirementObligation', window );">Balance at beginning of period</a></td>
        <td class="nump">$ 4,422<span></span></td>
        <td class="nump">$ 3,455<span></span></td>
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      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AssetRetirementObligationLiabilitiesIncurred', window );">Liabilities incurred</a></td>
        <td class="nump">71<span></span></td>
        <td class="nump">106<span></span></td>
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      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AssetRetirementObligationLiabilitiesSettled', window );">Liabilities settled</a></td>
        <td class="num">(13)<span></span></td>
        <td class="num">(68)<span></span></td>
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      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_AssetRetirementObligationAccretionExpenseAccrued', window );">Accretion expense</a></td>
        <td class="nump">41<span></span></td>
        <td class="nump">37<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AssetRetirementObligationRevisionOfEstimate', window );">Revision in estimated costs of plugging oil and natural gas wells</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">550<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AssetRetirementObligation', window );">Asset retirement obligation at end of period</a></td>
        <td class="nump">$ 4,521<span></span></td>
        <td class="nump">$ 4,080<span></span></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Asset Retirement Obligation, Accretion Expense Accrued</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                  <tr>
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                    <td>xbrli:stringItemType</td>
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                    <td>duration</td>
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 143<br><br> -Paragraph 3, 10, 22<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 410<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6392692&amp;loc=d3e7535-110849<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Asset Retirement Obligation<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6505190<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                    <td><strong> Name:</strong></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of asset retirement obligations incurred during the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 410<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (c)(1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6392692&amp;loc=d3e7535-110849<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 143<br><br> -Paragraph 22<br><br> -Subparagraph c(1)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_AssetRetirementObligationLiabilitiesIncurred</nobr></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 410<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (c)(2)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6392692&amp;loc=d3e7535-110849<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 143<br><br> -Paragraph 22<br><br> -Subparagraph c(2)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                  <tr>
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                    <td><strong> Balance Type:</strong></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of the Increase or Decrease in the amount of the asset retirement obligation during the current period for changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 410<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (c)(4)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6392692&amp;loc=d3e7535-110849<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 143<br><br> -Paragraph 22<br><br> -Subparagraph c(4)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
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                    <td><nobr>us-gaap_AssetRetirementObligationRevisionOfEstimate</nobr></td>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EGEAE">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Goodwill by Operating Segment (Detail) (USD $)<br>In Thousands, unless otherwise specified</strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
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      <tr>
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          <div>Mar. 31, 2013</div>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_GoodwillLineItems', window );"><strong>Goodwill [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_Goodwill', window );">Beginning Balance</a></td>
        <td class="nump">$ 153,809<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_GoodwillPeriodIncreaseDecrease', window );">Changes to goodwill</a></td>
        <td class="text">&nbsp;&nbsp;<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_Goodwill', window );">Ending Balance</a></td>
        <td class="nump">153,809<span></span></td>
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      <tr class="rh">
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          <div class="a">Contract Drilling</div>
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        <td class="text">&#xA0;<span></span></td>
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      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_GoodwillLineItems', window );"><strong>Goodwill [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_Goodwill', window );">Beginning Balance</a></td>
        <td class="nump">86,234<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_GoodwillPeriodIncreaseDecrease', window );">Changes to goodwill</a></td>
        <td class="text">&nbsp;&nbsp;<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_Goodwill', window );">Ending Balance</a></td>
        <td class="nump">86,234<span></span></td>
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      <tr class="rh">
        <td class="pl" style="border-bottom: 0px;" valign="top">
          <div class="a">Pressure Pumping</div>
        </td>
        <td class="text">&#xA0;<span></span></td>
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      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_GoodwillLineItems', window );"><strong>Goodwill [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_Goodwill', window );">Beginning Balance</a></td>
        <td class="nump">67,575<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_GoodwillPeriodIncreaseDecrease', window );">Changes to goodwill</a></td>
        <td class="text">&nbsp;&nbsp;<span></span></td>
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        <td class="nump">$ 67,575<span></span></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 142<br><br> -Paragraph 45<br><br> -Subparagraph e<br><br> -Clause 1<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=14024403&amp;loc=d3e13816-109267<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 20<br><br> -Section 45<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6388280&amp;loc=d3e13770-109266<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 141R<br><br> -Paragraph 68<br><br> -Subparagraph l<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 141R<br><br> -Paragraph 34<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 142<br><br> -Paragraph 43<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 142<br><br> -Paragraph 45<br><br> -Subparagraph e<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 141R<br><br> -Paragraph 72<br><br> -Subparagraph d<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_Goodwill</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
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                    <td>xbrli:monetaryItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
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                    <td><strong> Name:</strong></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Change in the carrying value of goodwill. The change could be the result of new goodwill acquired, goodwill impairment, if any, goodwill written off related to the sale of a business or other adjustments to goodwill.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=14024403&amp;loc=d3e13816-109267<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 142<br><br> -Paragraph 45<br><br> -Subparagraph e<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 141R<br><br> -Paragraph 72<br><br> -Subparagraph d<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_GoodwillPeriodIncreaseDecrease</nobr></td>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EJF">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Consolidated Statements Of Cash Flows (Parenthetical) (USD $)<br>In Thousands, unless otherwise specified</strong></div>
        </th>
        <th class="th" colspan="2">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th">
          <div>Mar. 31, 2012</div>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_InterestPaidCapitalized', window );">Interest expense, capitalized interest</a></td>
        <td class="nump">$ 2,281<span></span></td>
        <td class="nump">$ 1,968<span></span></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The amount of cash paid during the current period for interest that is capitalized.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6367179&amp;loc=d3e4297-108586<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 29<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 25<br><br> -Subparagraph (e)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3536-108585<br><br><br><br></p>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0E2E">
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          <div style="width: 200px;"><strong>Business Segments - Additional Information (Detail)<br></strong></div>
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          <div>Mar. 31, 2013

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          <div>Segment</div>
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<DOCUMENT>
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<TEXT>
<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Asset Retirement Obligation (Tables)<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
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          <div>Mar. 31, 2013</div>
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<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The following
table describes the changes to the Company&#x2019;s asset retirement
obligations during the three months ended March&#xA0;31, 2013 and
2012 (in thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="82%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="6" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Three&#xA0;Months&#xA0;Ended</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>March&#xA0;
31,</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
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<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font></td>
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</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Balance at beginning of
year</font></p>
</td>
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<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">4,422</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">3,455</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Liabilities
incurred</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">71</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">106</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Liabilities
settled</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(13</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(68</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Accretion
expense</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">41</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">37</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Revision in estimated costs
of plugging oil and natural gas wells</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">550</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Asset retirement obligation
at end of period</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">4,521</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">4,080</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
</table>
</div><span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 410<br><br> -SubTopic 30<br><br> -Section 50<br><br> -Paragraph 5<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6393242&amp;loc=d3e13201-110859<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>nonnum:textBlockItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
    </div>
  </body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>29
<FILENAME>R28.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Accrued Expenses (Tables)<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock', window );">Accrued Expenses</a></td>
        <td class="text"><div>
<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Accrued
expenses consisted of the following at March&#xA0;31, 2013 and
December&#xA0;31, 2012 (in thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="74%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>March&#xA0;31,</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>December&#xA0;31,</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Salaries, wages, payroll
taxes and benefits</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">39,276</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">55,430</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Workers&#x2019; compensation
liability</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">66,755</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">68,441</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Property, sales, use and
other taxes</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">7,211</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">9,749</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Insurance, other than
workers&#x2019; compensation</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">6,104</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">10,419</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Accrued interest
payable</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">14,518</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">7,664</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Deferred
revenue&#x2014;current</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1,523</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Other</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">7,653</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,406</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top"></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">141,517</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">158,632</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
</table>
</div><span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Tabular disclosure of the components of accrued liabilities.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>nonnum:textBlockItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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          </td>
        </tr>
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    </div>
  </body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>30
<FILENAME>R56.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EIEAC">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Cash Dividends (Detail) (USD $)<br>In Thousands, except Per Share data, unless otherwise specified</strong></div>
        </th>
        <th class="th" colspan="2">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th">
          <div>Mar. 31, 2012</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_StockholdersEquityNoteLineItems', window );"><strong>Stockholders Equity Note [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DividendPayableDateToBePaidDayMonthAndYear', window );">Cash dividends paid, date</a></td>
        <td class="text">Mar. 29,
         2013<span></span></td>
        <td class="text">Mar. 30,
         2012<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CommonStockDividendsPerShareCashPaid', window );">Cash dividends paid, per share</a></td>
        <td class="nump">$ 0.05<span></span></td>
        <td class="nump">$ 0.05<span></span></td>
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      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DividendsCommonStockCash', window );">Cash dividends paid</a></td>
        <td class="nump">$ 7,312<span></span></td>
        <td class="nump">$ 7,788<span></span></td>
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                <p>Aggregate dividends paid during the period for each share of common stock outstanding.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Article 3<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.3-04)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br></p>
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                <p>Date the declared dividend will be paid, in CCYY-MM-DD format.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 3<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6367179&amp;loc=d3e4304-108586<br><br><br><br></p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Equity impact of common stock cash dividends declared by an entity during the period. This element includes paid and unpaid dividends declared during the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Article 3<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.3-04)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br></p>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAYAE">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Business Segments - Revenues (Detail) (USD $)<br>In Thousands, unless otherwise specified</strong></div>
        </th>
        <th class="th" colspan="4">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th" colspan="2">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th" colspan="2">
          <div>Mar. 31, 2012</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SegmentReportingRevenueReconcilingItemLineItems', window );"><strong>Segment Reporting, Revenue Reconciling Item [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="nump">$ 16,785<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">$ 14,717<span></span></td>
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        <td class="nump">667,039<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">745,921<span></span></td>
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        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SegmentReportingRevenueReconcilingItemLineItems', window );"><strong>Segment Reporting, Revenue Reconciling Item [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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        <td class="nump">16,785<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">14,717<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SalesRevenueNet', window );">Revenues</a></td>
        <td class="nump">668,178<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">747,142<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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      <tr class="rh">
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          <div class="a">Operating Segments | Contract Drilling</div>
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        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SegmentReportingRevenueReconcilingItemLineItems', window );"><strong>Segment Reporting, Revenue Reconciling Item [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="nump">490,703<span></span></td>
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        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="nump">241,722<span></span></td>
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          <div class="a">Intersegment Elimination</div>
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        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SegmentReportingRevenueReconcilingItemLineItems', window );"><strong>Segment Reporting, Revenue Reconciling Item [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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        <td class="num">$ (1,139)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"><sup>[1]</sup></td>
        <td class="num">$ (1,221)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"><sup>[1]</sup></td>
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      <tr>
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              <td style="vertical-align: top;" valign="top">[1]</td>
              <td style="vertical-align: top;" valign="top">Consists of contract drilling intercompany revenues for drilling services provided to the oil and natural gas exploration and production segment.</td>
            </tr>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Revenue from the sale of oil and gas during the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 932<br><br> -SubTopic 235<br><br> -Section 50<br><br> -Paragraph 23<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=8451039&amp;loc=d3e62136-109447<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 932<br><br> -SubTopic 235<br><br> -Section 50<br><br> -Paragraph 24<br><br> -URI http://asc.fasb.org/extlink&amp;oid=8451039&amp;loc=d3e62246-109447<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_OilAndGasSalesRevenue</nobr></td>
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                    <td>us-gaap_</td>
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                    <td>xbrli:monetaryItemType</td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Revenue from oil and gas-related services including well services (such as drilling, rigs and analytic evaluations), transportation, and other supporting contractor services, during the reporting period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.1(d))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_RevenueOilAndGasServices</nobr></td>
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        <tr>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 1<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_SalesRevenueNet</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_SegmentReportingRevenueReconcilingItemLineItems">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_SegmentReportingRevenueReconcilingItemLineItems</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
    </div>
  </body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>32
<FILENAME>R30.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Long Term Debt (Tables)<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock', window );">Schedule of Principal Repayment Requirements of Long Term Debt</a></td>
        <td class="text"><div>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Presented below
is a schedule of the principal repayment requirements of long-term
debt by fiscal year as of March&#xA0;31, 2013 (in
thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="68%" align="center">
<tr>
<td width="87%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top" colspan="4">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Year ending
December&#xA0;31,</font></p>
</td>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></p>
</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">2014</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">10,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">2015</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">12,500</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">2016</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">28,750</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">2017</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">41,250</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">Thereafter</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">600,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">Total</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">697,500</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
</table>
</div><span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 470<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6802200&amp;loc=d3e1835-112601<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>nonnum:textBlockItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
    </div>
  </body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>33
<FILENAME>R31.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Stockholders' Equity (Tables)<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_DividendActivityTextBlock', window );">Cash Dividends</a></td>
        <td class="text"><div>
<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The Company
paid cash dividends during the three months ended March&#xA0;31,
2012 and 2013 as follows:</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="76%"></td>
<td valign="bottom" width="8%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="8%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2012:</b></font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Per&#xA0;Share</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Total</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom" colspan="2"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1">(in&#xA0;thousands)</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Paid on March&#xA0;30,
2012</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.05</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">7,788</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
</table>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="76%"></td>
<td valign="bottom" width="8%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="8%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2013:</b></font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Per&#xA0;Share</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Total</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom" colspan="2"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1">(in&#xA0;thousands)</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Paid on March&#xA0;29,
2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.05</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">7,312</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
</table>
</div><span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_DividendActivityTextBlock">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Dividend Activity</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_DividendActivityTextBlock</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
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                    <td><strong> Data Type:</strong></td>
                    <td>nonnum:textBlockItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
    </div>
  </body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>34
<FILENAME>R8.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EB2AG">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Consolidated Statements Of Cash Flows (USD $)<br>In Thousands, unless otherwise specified</strong></div>
        </th>
        <th class="th" colspan="4">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th" colspan="2">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th" colspan="2">
          <div>Mar. 31, 2012</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract', window );"><strong>Cash flows from operating activities:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ProfitLoss', window );">Net income</a></td>
        <td class="nump">$ 56,230<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">$ 97,274<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract', window );"><strong>Adjustments to reconcile net income to net cash provided by operating activities:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_DepreciationDepletionAmortizationAndImpairment', window );">Depreciation, depletion, amortization and impairment</a></td>
        <td class="nump">136,435<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">122,953<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ProvisionForDoubtfulAccounts', window );">Provision for bad debts</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">1,600<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ExplorationAbandonmentAndImpairmentExpense', window );">Dry holes and abandonments</a></td>
        <td class="nump">10<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">56<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DeferredIncomeTaxExpenseBenefit', window );">Deferred income tax expense</a></td>
        <td class="nump">24,555<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">48,407<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensation', window );">Stock-based compensation expense</a></td>
        <td class="nump">5,903<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">5,458<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_GainLossOnSaleOfPropertyPlantEquipment', window );">Net (gain) loss on asset disposals</a></td>
        <td class="nump">125<span></span></td>
        <td class="fn" style="border-bottom: 0px;"><sup>[1]</sup></td>
        <td class="num">(2,400)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"><sup>[1]</sup></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract', window );"><strong>Changes in operating assets and liabilities:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInAccountsReceivable', window );">Accounts receivable</a></td>
        <td class="num">(25,220)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(38,109)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_IncreaseDecreaseInIncomeTaxesReceivableAndPayable', window );">Income taxes receivable/payable</a></td>
        <td class="nump">1,267<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">5,807<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_IncreaseDecreaseInInventoryAndOtherAssets', window );">Inventory and other assets</a></td>
        <td class="nump">6,672<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">5,332<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInAccountsPayable', window );">Accounts payable</a></td>
        <td class="nump">21,385<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">30,418<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInAccruedLiabilities', window );">Accrued expenses</a></td>
        <td class="num">(17,698)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(12,234)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities', window );">Other liabilities</a></td>
        <td class="nump">53<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(897)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="reu">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInOperatingActivities', window );">Net cash provided by operating activities</a></td>
        <td class="nump">209,717<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">263,665<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract', window );"><strong>Cash flows from investing activities:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment', window );">Purchase of property and equipment</a></td>
        <td class="num">(174,161)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(263,403)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment', window );">Proceeds from disposal of assets</a></td>
        <td class="nump">707<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">4,651<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="reu">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInInvestingActivities', window );">Net cash used in investing activities</a></td>
        <td class="num">(173,454)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(258,752)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract', window );"><strong>Cash flows from financing activities:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PaymentsForRepurchaseOfCommonStock', window );">Purchase of treasury stock</a></td>
        <td class="num">(15,201)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(15)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PaymentsOfDividends', window );">Dividends paid</a></td>
        <td class="num">(7,312)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(7,788)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities', window );">Tax benefit related to stock-based compensation</a></td>
        <td class="nump">2,737<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">166<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_RepaymentsOfLongTermDebt', window );">Repayment of long-term debt</a></td>
        <td class="num">(1,250)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(2,500)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ProceedsFromLinesOfCredit', window );">Proceeds from borrowing under revolving credit facility</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">54,500<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_RepaymentsOfLinesOfCredit', window );">Repayment of borrowing under revolving credit facility</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(56,000)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ProceedsFromStockOptionsExercised', window );">Proceeds from exercise of stock options</a></td>
        <td class="nump">18,622<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">195<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="rou">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInFinancingActivities', window );">Net cash used in financing activities</a></td>
        <td class="num">(2,404)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(11,442)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents', window );">Effect of foreign exchange rate changes on cash</a></td>
        <td class="num">(551)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">408<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="rou">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease', window );">Net increase (decrease) in cash and cash equivalents</a></td>
        <td class="nump">33,308<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(6,121)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CashAndCashEquivalentsAtCarryingValue', window );">Cash and cash equivalents at beginning of period</a></td>
        <td class="nump">110,723<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">23,946<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CashAndCashEquivalentsAtCarryingValue', window );">Cash and cash equivalents at end of period</a></td>
        <td class="nump">144,031<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">17,825<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_CashPaidRefundedDuringPeriodForAbstract', window );"><strong>Net cash paid during the period for:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_InterestPaidNet', window );">Interest, net of capitalized interest of $2,281 in 2013 and $1,968 in 2012</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(364)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncomeTaxesPaidNet', window );">Income taxes</a></td>
        <td class="num">(3,543)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(1,390)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract', window );"><strong>Supplemental investing and financing information:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1', window );">Net increase in current liabilities for purchase of property and equipment</a></td>
        <td class="nump">24,039<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">2,553<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_NetDecreaseIncreaseInDepositsOnEquipmentPurchases', window );">Net decrease in deposits on equipment purchases</a></td>
        <td class="nump">$ 7,863<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">$ 1,900<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr>
        <td colspan="5"></td>
      </tr>
      <tr>
        <td colspan="5">
          <table class="outerFootnotes" width="100%">
            <tr class="outerFootnote">
              <td style="vertical-align: top;" valign="top">[1]</td>
              <td style="vertical-align: top;" valign="top">Net gains or losses associated with the disposal of assets relate to corporate strategy decisions of the executive management group. Accordingly, the related gains or losses have been separately presented and excluded from the results of specific segments.</td>
            </tr>
          </table>
        </td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_CashPaidRefundedDuringPeriodForAbstract">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_CashPaidRefundedDuringPeriodForAbstract</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_DepreciationDepletionAmortizationAndImpairment">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Depreciation, Depletion, Amortization and Impairment</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_DepreciationDepletionAmortizationAndImpairment</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_IncreaseDecreaseInIncomeTaxesReceivableAndPayable">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Increase (Decrease) in Income Taxes Receivable and Payable</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Increase (Decrease) In Inventory and Other Assets</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_IncreaseDecreaseInInventoryAndOtherAssets</nobr></td>
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        <tr>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Net Decrease (Increase) In Deposits on Equipment Purchases</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_NetDecreaseIncreaseInDepositsOnEquipmentPurchases</nobr></td>
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        </tr>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract">
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract</nobr></td>
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 1<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6676-107765<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Cash Equivalents<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6507016<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 8, 9<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 7, 26<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Cash<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6506951<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 4<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3044-108585<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 7<br><br> -Footnote 1<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 9: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 1<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_CashAndCashEquivalentsAtCarryingValue</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
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            </div>
          </td>
        </tr>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 24<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3521-108585<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 26<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease</nobr></td>
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract</nobr></td>
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                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
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                    <td><strong> Data Type:</strong></td>
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                    <td><strong> Balance Type:</strong></td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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          </td>
        </tr>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DeferredIncomeTaxExpenseBenefit">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 109<br><br> -Paragraph 289<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 109<br><br> -Paragraph 45<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SAB TOPIC 6.I.7)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6889476&amp;loc=d3e330036-122817<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 9<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6907707&amp;loc=d3e32639-109319<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Deferred Tax Expense (or Benefit)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6510177<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 08<br><br> -Paragraph h<br><br> -Article 4<br><br><br><br>Reference 9: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 235<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.4-08.(h))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6881521&amp;loc=d3e23780-122690<br><br><br><br>Reference 10: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Staff Accounting Bulletin (SAB)<br><br> -Number Topic 6<br><br> -Section I<br><br> -Subsection 7<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_DeferredIncomeTaxExpenseBenefit</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The effect of exchange rate changes on cash balances held in foreign currencies.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 830<br><br> -SubTopic 230<br><br> -Section 45<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6450594&amp;loc=d3e33268-110906<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 25<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of excess tax benefit (tax deficiency) that arises when compensation cost from non-qualified share-based compensation recognized on the entity's tax return exceeds (is less than) compensation cost from equity-based compensation recognized in financial statements. Excess tax benefit (tax deficiency) increases (decreases) net cash provided by financing activities.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 20<br><br> -Section 55<br><br> -Paragraph 24<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6576910&amp;loc=d3e11374-113907<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ExplorationAbandonmentAndImpairmentExpense">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The adjustment to expense previously capitalized costs of drilling exploratory wells when proved reserves are not found or when the entity obtains information that raises substantial doubt about the economic or operational viability of the project.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 932<br><br> -SubTopic 360<br><br> -Section 40<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6475089&amp;loc=d3e66584-109467<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 932<br><br> -SubTopic 360<br><br> -Section 40<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6475089&amp;loc=d3e66610-109467<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 19<br><br> -Paragraph 27, 28, 40, 41<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 932<br><br> -SubTopic 360<br><br> -Section 40<br><br> -Paragraph 3<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6475089&amp;loc=d3e66625-109467<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 932<br><br> -SubTopic 360<br><br> -Section 35<br><br> -Paragraph 11<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6475018&amp;loc=d3e66150-109466<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ExplorationAbandonmentAndImpairmentExpense</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_GainLossOnSaleOfPropertyPlantEquipment">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain (loss).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_GainLossOnSaleOfPropertyPlantEquipment</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncomeTaxesPaidNet">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6367179&amp;loc=d3e4297-108586<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 29<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 27<br><br> -Subparagraph f<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_IncomeTaxesPaidNet</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInAccountsPayable">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_IncreaseDecreaseInAccountsPayable</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInAccountsReceivable">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_IncreaseDecreaseInAccountsReceivable</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInAccruedLiabilities">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The increase (decrease) during the reporting period in the aggregate amount of expenses incurred but not yet paid.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_IncreaseDecreaseInAccruedLiabilities</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_IncreaseDecreaseInOperatingCapitalAbstract</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The increase (decrease) during the reporting period in other liabilities used in operating activities not separately disclosed in the statement of cash flows. May include changes in other current liabilities, other noncurrent liabilities, or a combination of other current and noncurrent liabilities.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_IncreaseDecreaseInOtherOperatingLiabilities</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_InterestPaidNet">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6367179&amp;loc=d3e4297-108586<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 29<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 27<br><br> -Subparagraph e<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_InterestPaidNet</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
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                    <td><strong> Period Type:</strong></td>
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                  </tr>
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              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInFinancingActivities">
        <tr>
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        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The net cash inflow or outflow from financing activity for the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 24<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3521-108585<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 26<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3574-108585<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 26<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_NetCashProvidedByUsedInFinancingActivities</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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            </div>
          </td>
        </tr>
      </table>
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInInvestingActivities">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The net cash inflow or outflow from investing activity.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 24<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3521-108585<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 26<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3574-108585<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 26<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_NetCashProvidedByUsedInInvestingActivities</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
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              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInOperatingActivities">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 26<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 25<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3536-108585<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 24<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3521-108585<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_NetCashProvidedByUsedInOperatingActivities</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The net book value of a nonmonetary asset transferred or exchanged in connection with the acquisition of a business or asset in a noncash transaction. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Nonmonetary assets and liabilities are assets and liabilities that will not result in cash receipts or cash payments in the future.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 5<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6367179&amp;loc=d3e4332-108586<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 4<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6367179&amp;loc=d3e4313-108586<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 3<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6367179&amp;loc=d3e4304-108586<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 32<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PaymentsForRepurchaseOfCommonStock">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The cash outflow to reacquire common stock during the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 20<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Financing Activities<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6513228<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 18<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 15<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3291-108585<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_PaymentsForRepurchaseOfCommonStock</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PaymentsOfDividends">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 20<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Financing Activities<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6513228<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 18<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 15<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3291-108585<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_PaymentsOfDividends</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 15<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Investing Activities<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6516133<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 13<br><br> -Subparagraph (c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3213-108585<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 17<br><br> -Subparagraph c<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_PaymentsToAcquirePropertyPlantAndEquipment</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromLinesOfCredit">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 19<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Financing Activities<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6513228<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 18<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 14<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3255-108585<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ProceedsFromLinesOfCredit</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 16<br><br> -Subparagraph c<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Investing Activities<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6516133<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 15<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 12<br><br> -Subparagraph (c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3179-108585<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromStockOptionsExercised">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph i<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 14<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3255-108585<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Financing Activities<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6513228<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 19<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 18<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (j)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ProceedsFromStockOptionsExercised</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProfitLoss">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph A1, A4, A5<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 19<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7656940&amp;loc=SL4569616-111683<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 29<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 5<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 55<br><br> -Paragraph 4K<br><br> -URI http://asc.fasb.org/extlink&amp;oid=18733213&amp;loc=SL4591552-111686<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1A<br><br> -Subparagraph (a),(c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=18733093&amp;loc=SL4573702-111684<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 38<br><br> -Subparagraph c(1)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 38<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 9: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 55<br><br> -Paragraph 4J<br><br> -URI http://asc.fasb.org/extlink&amp;oid=18733213&amp;loc=SL4591551-111686<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ProfitLoss</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProvisionForDoubtfulAccounts">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 5<br><br> -Article 5<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.5)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ProvisionForDoubtfulAccounts</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The cash outflow to pay off an obligation from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 18<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Financing Activities<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6513228<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 15<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3291-108585<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 20<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_RepaymentsOfLinesOfCredit</nobr></td>
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                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 18<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Financing Activities<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6513228<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 15<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3291-108585<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 20<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_RepaymentsOfLongTermDebt</nobr></td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensation">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
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                    <td><nobr>us-gaap_ShareBasedCompensation</nobr></td>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Fair Values of Financial Instruments (Tables)<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_FairValueByBalanceSheetGroupingTextBlock', window );">Estimated Fair Value of Outstanding Debt Balances</a></td>
        <td class="text"><div>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The estimated
fair value of the Company&#x2019;s outstanding debt balances
(including current portion) as of March&#xA0;31, 2013 and
December&#xA0;31, 2012 is set forth below (in
thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="92%" align="center">
<tr>
<td width="64%"></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom" colspan="6" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>March&#xA0;31,
2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom" colspan="6" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>December&#xA0;31,
2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Carrying</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Value</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Fair</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Value</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Carrying</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Value</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Fair</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Value</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Borrowings under Credit
Agreement:</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">Term loan
facility</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">97,500</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">97,500</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">98,750</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">98,750</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">4.97% Series A Senior
Notes</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">300,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">321,743</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">300,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">329,281</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">4.27% Series B Senior
Notes</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">300,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">303,342</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">300,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">310,591</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Total debt</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">697,500</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">722,585</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">698,750</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">738,622</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
</table>
</div><span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_FairValueByBalanceSheetGroupingTextBlock">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 107<br><br> -Paragraph 14<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 159<br><br> -Paragraph 18<br><br> -Subparagraph c(2), d, e, f<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 825<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 10<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7491637&amp;loc=d3e13433-108611<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 107<br><br> -Paragraph 15<br><br> -Subparagraph b-d<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  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        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">$ 500,000,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">$ 150,000,000<span></span></td>
        <td class="nump">$ 40,000,000<span></span></td>
        <td class="nump">$ 100,000,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms', window );">Line of credit facility, frequency of payment and payment terms</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">The term loan facility is payable in quarterly principal  installments commencing December 27, 2012. The installment amounts vary from  1.25% of the original principal amount for each of the first four quarterly  installments, 2.50% of the original principal amount for each of the subsequent  eight quarterly installments, 5.00% of the original principal amount for the  subsequent four quarterly installments and 13.75% of the original principal  amount for the final four quarterly installments.<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LineOfCreditFacilityFrequencyOfPayments', window );">Line of credit facility, frequency of payments</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">Quarterly<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DebtInstrumentDateOfFirstRequiredPayment1', window );">Commencement date of principal payments</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">Dec. 27,
         2012<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_PrincipalPaymentsPercentage', window );">Installment amounts percentage of the original principal amount</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">1.25%<span></span></td>
        <td class="nump">2.50%<span></span></td>
        <td class="nump">5.00%<span></span></td>
        <td class="nump">13.75%<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_LineOfCreditFacilityAdditionalBorrowingCapacity', window );">Aggregate amount by which the revolving credit facility can be increased</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">100,000,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity', window );">Credit facility, maximum borrowing capacity</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">700,000,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DebtInstrumentMaturityDate', window );">Debt maturity date</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">Sep. 27,
         2017<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">Oct.
        05,
         2020<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">Jun. 14,
         2022<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_ApplicableMarginRate', window );">Applicable margin</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">2.25%<span></span></td>
        <td class="nump">2.25%<span></span></td>
        <td class="nump">3.25%<span></span></td>
        <td class="nump">1.25%<span></span></td>
        <td class="nump">1.25%<span></span></td>
        <td class="nump">2.25%<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage', window );">Commitment fee payable to the lenders for the unused portion of the credit facility</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">0.50%<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LineOfCreditFacilityCovenantTerms', window );">Financial covenant description</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">The Company must not permit its debt to capitalization ratio to exceed 45%. The Credit Agreement generally defines the debt to capitalization ratio as the ratio of (a)&#xA0;total borrowed money indebtedness to (b)&#xA0;the sum of such indebtedness plus consolidated net worth, with consolidated net worth determined as of the last day of the most recently ended fiscal quarter. The Company also must not permit the interest coverage ratio as of the last day of a fiscal quarter to be less than 3.00 to 1.00. The Credit Agreement generally defines the interest coverage ratio as the ratio of earnings before interest, taxes, depreciation and amortization (&#x201C;EBITDA&#x201D;) of the four prior fiscal quarters to interest charges for the same period. The Company was in compliance with these covenants at March&#xA0;31, 2013.<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_NumberOfCovenants', window );">Number of compliance covenants</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">2<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">2<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">2<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_ConsolidatedDebtAsPercentageOfTotalCapitalization', window );">Debt to capitalization ratio, percentage the Company must not exceed at any time</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">45.00%<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">50.00%<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">50.00%<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_InterestCoverageRatio', window );">Interest coverage ratio that the Company must exceed on the last day of the fiscal quarter</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">3.00<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">2.50<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">2.50<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LineOfCreditFacilityAmountOutstanding', window );">Line of credit, amount outstanding</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">97,500,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd', window );">Line of credit facility, interest rate</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">2.625%<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LettersOfCreditOutstandingAmount', window );">Unfunded letters of credit, amount outstanding</a></td>
        <td class="nump">39,800,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">39,800,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity', window );">Line of credit, available borrowing capacity</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">460,000,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DebtInstrumentIssuanceDate1', window );">Notes issuance date</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">Oct.
        05,
         2010<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">Jun. 14,
         2012<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DebtInstrumentFaceAmount', window );">Long-term debt, aggregate principal amount</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">300,000,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">300,000,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DebtInstrumentInterestRateStatedPercentage', window );">Debt interest rate</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">4.97%<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">4.27%<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_DebtInstrumentInterestRatePaymentDate', window );">Interest pay date</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">April 5<span></span></td>
        <td class="text">October 5<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">April 5<span></span></td>
        <td class="text">October 5<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_DebtInstrumentPrepaymentTerms', window );">Description of the prepayment terms</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">Notes are prepayable at the Company's option, in  whole or in part, provided that in the case of a partial prepayment, prepayment  must be in an amount not less than 5% of the aggregate principal amount of the  notes then outstanding, at any time and from time to time at 100% of the  principal amount prepaid, plus accrued and unpaid interest to the prepayment  date<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">Notes are prepayable at the Company's option, in  whole or in part, provided that in the case of a partial prepayment, prepayment  must be in an amount not less than 5% of the aggregate principal amount of the  notes then outstanding, at any time and from time to time at 100% of the  principal amount prepaid, plus accrued and unpaid interest to the prepayment  date<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_DebtRedemptionPricePercentOfPrincipalAmount', window );">Prepayment terms, percent of principal before accrued and unpaid interest and "make-whole" premium</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">100.00%<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">100.00%<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_DebtInstrumentAcceptanceTerms', window );">Description of the acceptance terms</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">If any offer to prepay is accepted, the  purchase price of each prepaid note is 100% of the principal amount thereof,  plus accrued and unpaid interest thereon to the prepayment date.<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">If any offer to prepay is accepted, the  purchase price of each prepaid note is 100% of the principal amount thereof,  plus accrued and unpaid interest thereon to the prepayment date.<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_PercentageOfRepurchasePriceToPrincipalDebtAmount', window );">Acceptance terms, percent of principal before accrued and unpaid interest</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">100.00%<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">100.00%<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DebtInstrumentCovenantDescription', window );">Financial covenant description</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">The Company must not permit its debt to capitalization ratio to exceed 50% at any time. The note purchase agreements generally define the debt to capitalization ratio as the ratio of (a) total borrowed money indebtedness to (b) the sum of such indebtedness plus consolidated net worth, with consolidated net worth determined as of the last day of the most recently ended fiscal quarter. The Company also must not permit the interest coverage ratio as of the last day of a fiscal quarter to be less than 2.50 to 1.00. The note purchase agreements generally define the interest coverage ratio as the ratio of EBITDA for the four prior fiscal quarters to interest charges for that same period. The Company was in compliance with these covenants at March 31, 2013.<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">The Company must not permit its debt to capitalization ratio to exceed 50% at any time. The note purchase agreements generally define the debt to capitalization ratio as the ratio of (a) total borrowed money indebtedness to (b) the sum of such indebtedness plus consolidated net worth, with consolidated net worth determined as of the last day of the most recently ended fiscal quarter. The Company also must not permit the interest coverage ratio as of the last day of a fiscal quarter to be less than 2.50 to 1.00. The note purchase agreements generally define the interest coverage ratio as the ratio of EBITDA for the four prior fiscal quarters to interest charges for that same period. The Company was in compliance with these covenants at March 31, 2013.<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PaymentsOfDebtIssuanceCosts', window );">Debt issuance costs</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">10,800,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">7,600,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_InterestExpenseNet', window );">Interest expense on debt extinguishment</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">978,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AmortizationOfFinancingCosts', window );">Interest expense related to amortization of debt issuance costs</a></td>
        <td class="nump">$ 547,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">$ 604,000<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_ApplicableMarginRate">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Applicable Margin Rate</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_ApplicableMarginRate</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:percentItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_ConsolidatedDebtAsPercentageOfTotalCapitalization">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Consolidated Debt As Percentage Of Total Capitalization</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_ConsolidatedDebtAsPercentageOfTotalCapitalization</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:percentItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_DebtDisclosureLineItems">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_DebtDisclosureLineItems</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_DebtInstrumentAcceptanceTerms">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Debt Instrument, Acceptance Terms</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_DebtInstrumentAcceptanceTerms</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_DebtInstrumentInterestRatePaymentDate">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Debt Instrument, Interest Rate, Payment Date</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_DebtInstrumentInterestRatePaymentDate</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_DebtInstrumentPrepaymentTerms">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Debt Instrument, Prepayment Terms</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_DebtInstrumentPrepaymentTerms</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_DebtRedemptionPricePercentOfPrincipalAmount">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Debt Redemption Price Percent Of Principal Amount</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_DebtRedemptionPricePercentOfPrincipalAmount</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:percentItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_InterestCoverageRatio">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Interest Coverage ratio</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_InterestCoverageRatio</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:decimalItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_InterestExpenseNet">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The aggregate interest expense incurred on trading liabilities, commercial paper, long-term debt, capital leases, deposits and all other borrowings, net of interest earned.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_InterestExpenseNet</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_LineOfCreditFacilityAdditionalBorrowingCapacity">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Line of Credit Facility, Additional Borrowing Capacity</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_LineOfCreditFacilityAdditionalBorrowingCapacity</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_NumberOfCovenants">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Number of Covenants</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_NumberOfCovenants</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:integerItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_PercentageOfRepurchasePriceToPrincipalDebtAmount">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Percentage of repurchase price to principal debt amount</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_PercentageOfRepurchasePriceToPrincipalDebtAmount</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:percentItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_PrincipalPaymentsPercentage">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Principal payments, percentage</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_PrincipalPaymentsPercentage</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:percentItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AmortizationOfFinancingCosts">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Paragraph 8<br><br> -Article 9<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.8)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 8<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_AmortizationOfFinancingCosts</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentCovenantDescription">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 22<br><br> -Article 5<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 129<br><br> -Paragraph 2, 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 942<br><br> -SubTopic 470<br><br> -Section 50<br><br> -Paragraph 3<br><br> -Subparagraph (g)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6479336&amp;loc=d3e64711-112823<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_DebtInstrumentCovenantDescription</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td>xbrli:stringItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
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              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentDateOfFirstRequiredPayment1">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Date the debt agreement requires the first payment to be made, in CCYY-MM-DD format.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.22)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 22<br><br> -Article 5<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 942<br><br> -SubTopic 470<br><br> -Section 50<br><br> -Paragraph 3<br><br> -Subparagraph (c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6479336&amp;loc=d3e64711-112823<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_DebtInstrumentDateOfFirstRequiredPayment1</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:dateItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentFaceAmount">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 835<br><br> -SubTopic 30<br><br> -Section 45<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6451184&amp;loc=d3e28551-108399<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 835<br><br> -SubTopic 30<br><br> -Section 55<br><br> -Paragraph 8<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6584090&amp;loc=d3e28878-108400<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 21<br><br> -Paragraph 16, 20<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_DebtInstrumentFaceAmount</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentInterestRateStatedPercentage">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Interest rate stated in the contractual debt agreement.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 22<br><br> -Article 5<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.22(a)(1))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_DebtInstrumentInterestRateStatedPercentage</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
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                    <td>na</td>
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                    <td><strong> Period Type:</strong></td>
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                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentIssuanceDate1">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Date the debt instrument was issued, in CCYY-MM-DD format.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 22<br><br> -Article 5<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.22(a))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_DebtInstrumentIssuanceDate1</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:dateItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentMaturityDate">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 22<br><br> -Article 5<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.22(a)(2))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 129<br><br> -Paragraph 2, 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_DebtInstrumentMaturityDate</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:dateItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LettersOfCreditOutstandingAmount">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LettersOfCreditOutstandingAmount</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LineOfCreditFacilityAmountOutstanding">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount borrowed under the credit facility as of the balance sheet date.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 19, 22<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LineOfCreditFacilityAmountOutstanding</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LineOfCreditFacilityCovenantTerms">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Description of the conditions for borrowing under the credit facility including the nature of any restrictions.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 129<br><br> -Paragraph 2, 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.19(b),22(b))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 19, 22<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LineOfCreditFacilityCovenantTerms</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.19(b),22(b))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 19, 22<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Description of the frequency of the required periodic payments of interest, principal, or both, and the amount, if set, or a description of a formula upon which payment is based.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 129<br><br> -Paragraph 2, 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.19(b),22(b))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 19, 22<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LineOfCreditFacilityFrequencyOfPayments">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Description of the frequency of periodic payments, which may be presented in a variety of ways (for example, monthly, quarterly, annually).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 129<br><br> -Paragraph 2, 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.19(b),22(b))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 19, 22<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LineOfCreditFacilityFrequencyOfPayments</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
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          </td>
        </tr>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The effective interest rate at the end of the reporting period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.19(b),22(b))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 19, 22<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:percentItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 129<br><br> -Paragraph 2, 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.19(b),22(b))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 19, 22<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.19(b),22(b))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 19, 22<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:percentItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PaymentsOfDebtIssuanceCosts">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 15<br><br> -Subparagraph (e)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3291-108585<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Emerging Issues Task Force (EITF)<br><br> -Number 95-13<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_PaymentsOfDebtIssuanceCosts</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
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  <head>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EQMAG">
      <tr>
        <th class="tl" colspan="1" rowspan="1">
          <div style="width: 200px;"><strong>Consolidated Balance Sheets (USD $)<br>In Thousands, unless otherwise specified</strong></div>
        </th>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th">
          <div>Dec. 31, 2012</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AssetsCurrentAbstract', window );"><strong>Current assets:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CashAndCashEquivalentsAtCarryingValue', window );">Cash and cash equivalents</a></td>
        <td class="nump">$ 144,031<span></span></td>
        <td class="nump">$ 110,723<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AccountsReceivableNetCurrent', window );">Accounts receivable, net of allowance for doubtful accounts of $3,582 and $3,513 at March 31, 2013 and December 31, 2012, respectively</a></td>
        <td class="nump">491,230<span></span></td>
        <td class="nump">465,517<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_InventoryNet', window );">Inventory</a></td>
        <td class="nump">22,954<span></span></td>
        <td class="nump">26,889<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent', window );">Deferred tax assets, net</a></td>
        <td class="nump">42,505<span></span></td>
        <td class="nump">52,959<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OtherAssetsCurrent', window );">Other</a></td>
        <td class="nump">40,593<span></span></td>
        <td class="nump">43,903<span></span></td>
      </tr>
      <tr class="reu">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AssetsCurrent', window );">Total current assets</a></td>
        <td class="nump">741,313<span></span></td>
        <td class="nump">699,991<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PropertyPlantAndEquipmentNet', window );">Property and equipment, net</a></td>
        <td class="nump">3,682,750<span></span></td>
        <td class="nump">3,615,383<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IntangibleAssetsNetIncludingGoodwill', window );">Goodwill and intangible assets</a></td>
        <td class="nump">170,435<span></span></td>
        <td class="nump">171,463<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DepositsAssetsNoncurrent', window );">Deposits on equipment purchases</a></td>
        <td class="nump">35,913<span></span></td>
        <td class="nump">43,776<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OtherAssetsNoncurrent', window );">Other</a></td>
        <td class="nump">26,821<span></span></td>
        <td class="nump">26,298<span></span></td>
      </tr>
      <tr class="rou">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_Assets', window );">Total assets</a></td>
        <td class="nump">4,657,232<span></span></td>
        <td class="nump">4,556,911<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LiabilitiesCurrentAbstract', window );"><strong>Current liabilities:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AccountsPayableCurrent', window );">Accounts payable</a></td>
        <td class="nump">233,576<span></span></td>
        <td class="nump">188,823<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AccruedIncomeTaxesCurrent', window );">Federal and state income taxes payable</a></td>
        <td class="nump">7,261<span></span></td>
        <td class="nump">6,158<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AccruedLiabilitiesCurrent', window );">Accrued expenses</a></td>
        <td class="nump">141,517<span></span></td>
        <td class="nump">158,632<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LongTermDebtCurrent', window );">Current portion of long-term debt</a></td>
        <td class="nump">7,500<span></span></td>
        <td class="nump">6,250<span></span></td>
      </tr>
      <tr class="rou">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LiabilitiesCurrent', window );">Total current liabilities</a></td>
        <td class="nump">389,854<span></span></td>
        <td class="nump">359,863<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LongTermDebtNoncurrent', window );">Long-term debt</a></td>
        <td class="nump">690,000<span></span></td>
        <td class="nump">692,500<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent', window );">Deferred tax liabilities, net</a></td>
        <td class="nump">871,403<span></span></td>
        <td class="nump">857,302<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OtherLiabilitiesNoncurrent', window );">Other</a></td>
        <td class="nump">6,642<span></span></td>
        <td class="nump">6,589<span></span></td>
      </tr>
      <tr class="rou">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_Liabilities', window );">Total liabilities</a></td>
        <td class="nump">1,957,899<span></span></td>
        <td class="nump">1,916,254<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CommitmentsAndContingencies', window );">Commitments and contingencies (see Note 9)</a></td>
        <td class="text">&nbsp;&nbsp;<span></span></td>
        <td class="text">&nbsp;&nbsp;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StockholdersEquityAbstract', window );"><strong>Stockholders' equity:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PreferredStockValue', window );">Preferred stock, par value $.01; authorized 1,000,000 shares, no shares issued</a></td>
        <td class="text">&nbsp;&nbsp;<span></span></td>
        <td class="text">&nbsp;&nbsp;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CommonStockValue', window );">Common stock, par value $.01; authorized 300,000,000 shares with 185,212,330 and 184,059,900 issued and 146,427,968 and 145,913,162 outstanding at March 31, 2013 and December 31, 2012, respectively</a></td>
        <td class="nump">1,852<span></span></td>
        <td class="nump">1,841<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AdditionalPaidInCapital', window );">Additional paid-in capital</a></td>
        <td class="nump">890,809<span></span></td>
        <td class="nump">863,558<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_RetainedEarningsAccumulatedDeficit', window );">Retained earnings</a></td>
        <td class="nump">2,597,460<span></span></td>
        <td class="nump">2,548,542<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax', window );">Accumulated other comprehensive income</a></td>
        <td class="nump">19,464<span></span></td>
        <td class="nump">21,767<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_TreasuryStockValue', window );">Treasury stock, at cost, 38,784,362 shares and 38,146,738 shares at March 31, 2013 and December 31, 2012, respectively</a></td>
        <td class="num">(810,252)<span></span></td>
        <td class="num">(795,051)<span></span></td>
      </tr>
      <tr class="reu">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest', window );">Total stockholders' equity</a></td>
        <td class="nump">2,699,333<span></span></td>
        <td class="nump">2,640,657<span></span></td>
      </tr>
      <tr class="rou">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LiabilitiesAndStockholdersEquity', window );">Total liabilities and stockholders' equity</a></td>
        <td class="nump">$ 4,657,232<span></span></td>
        <td class="nump">$ 4,556,911<span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AccountsPayableCurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.19(a))<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 19<br><br><br><br> -Subparagraph a<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_AccountsPayableCurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AccountsReceivableNetCurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.3-4)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 3<br><br><br><br> -Subparagraph a(1)<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 4<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_AccountsReceivableNetCurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AccruedIncomeTaxesCurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 03<br><br><br><br> -Paragraph 15<br><br><br><br> -Subparagraph b(1)<br><br><br><br> -Article 7<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 03<br><br><br><br> -Paragraph 15<br><br><br><br> -Article 9<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 20<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br><br><br> -Number 109<br><br><br><br> -Section Appendix E<br><br><br><br> -Paragraph 289<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.20)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name FASB Interpretation (FIN)<br><br><br><br> -Number 48<br><br><br><br> -Paragraph 15, 21<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_AccruedIncomeTaxesCurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AccruedLiabilitiesCurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 20<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.20)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_AccruedLiabilitiesCurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br><br><br> -Number 130<br><br><br><br> -Paragraph 14, 17, 26<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 220<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 45<br><br><br><br> -Paragraph 11<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=20435746&amp;loc=d3e637-108580<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 220<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 45<br><br><br><br> -Paragraph 14A<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=20435746&amp;loc=SL7669686-108580<br><br><br><br><br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 220<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 45<br><br><br><br> -Paragraph 14<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=20435746&amp;loc=d3e681-108580<br><br><br><br><br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 04<br><br><br><br> -Article 3<br><br><br><br><br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 31<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher AICPA<br><br><br><br> -Name Accounting Principles Board Opinion (APB)<br><br><br><br> -Number 12<br><br><br><br> -Paragraph 10<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name FASB Staff Position (FSP)<br><br><br><br> -Number FAS115-1/124-1<br><br><br><br> -Paragraph 15D<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AdditionalPaidInCapital">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 31<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.30(a)(1))<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_AdditionalPaidInCapital</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_Assets">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 03<br><br><br><br> -Paragraph 12<br><br><br><br> -Article 7<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Statement of Financial Accounting Concepts (CON)<br><br><br><br> -Number 6<br><br><br><br> -Paragraph 25<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 18<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.18)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_Assets</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AssetsCurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 9<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.9)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 45<br><br><br><br> -Paragraph 3<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6801-107765<br><br><br><br><br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 45<br><br><br><br> -Paragraph 1<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6676-107765<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_AssetsCurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AssetsCurrentAbstract">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_AssetsCurrentAbstract</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CashAndCashEquivalentsAtCarryingValue">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 45<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (a)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6676-107765<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Glossary Cash Equivalents<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6507016<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br><br><br> -Number 95<br><br><br><br> -Paragraph 8, 9<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br><br><br> -Number 95<br><br><br><br> -Paragraph 7, 26<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Glossary Cash<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6506951<br><br><br><br><br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 230<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 45<br><br><br><br> -Paragraph 4<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3044-108585<br><br><br><br><br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br><br><br> -Number 95<br><br><br><br> -Paragraph 7<br><br><br><br> -Footnote 1<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.1)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 9: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 1<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_CashAndCashEquivalentsAtCarryingValue</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommitmentsAndContingencies">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 944<br><br><br><br> -SubTopic 210<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.7-03.(a),19)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6879938&amp;loc=d3e572229-122910<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.25)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 25<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 450<br><br><br><br> -SubTopic 20<br><br><br><br> -Section 50<br><br><br><br> -Paragraph 1<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6952336&amp;loc=d3e14326-108349<br><br><br><br><br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br><br><br> -Number 5<br><br><br><br> -Paragraph 8, 9<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 03<br><br><br><br> -Paragraph 17<br><br><br><br> -Article 9<br><br><br><br><br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 03<br><br><br><br> -Paragraph 19<br><br><br><br> -Article 7<br><br><br><br><br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 942<br><br><br><br> -SubTopic 210<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.9-03.17)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6876686&amp;loc=d3e534808-122878<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_CommitmentsAndContingencies</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
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              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockValue">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.29)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 30<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_CommonStockValue</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences expected to be realized or consumed within one year or operating cycle, if longer.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br><br><br> -Number 109<br><br><br><br> -Paragraph 41, 42, 43<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 740<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 45<br><br><br><br> -Paragraph 4<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=21917399&amp;loc=d3e31917-109318<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 740<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 50<br><br><br><br> -Paragraph 2<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6907707&amp;loc=d3e32537-109319<br><br><br><br><br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 740<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 45<br><br><br><br> -Paragraph 6<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=21917399&amp;loc=d3e31931-109318<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences expected to be realized or consumed after one year (or the normal operating cycle, if longer).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br><br><br> -Number 109<br><br><br><br> -Paragraph 41, 42, 43<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 740<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 45<br><br><br><br> -Paragraph 4<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=21917399&amp;loc=d3e31917-109318<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 740<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 50<br><br><br><br> -Paragraph 2<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6907707&amp;loc=d3e32537-109319<br><br><br><br><br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 740<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 45<br><br><br><br> -Paragraph 6<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=21917399&amp;loc=d3e31931-109318<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DepositsAssetsNoncurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment after one year or beyond the operating cycle, if longer.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.17)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 17<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_DepositsAssetsNoncurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IntangibleAssetsNetIncludingGoodwill">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_IntangibleAssetsNetIncludingGoodwill</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_InventoryNet">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Carrying amount (lower of cost or market) as of the balance sheet date of inventories less all valuation and other allowances. Excludes noncurrent inventory balances (expected to remain on hand past one year or one operating cycle, if longer).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.6(a))<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 330<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 35<br><br><br><br> -Paragraph 2<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6386567&amp;loc=d3e3927-108312<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 45<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (b)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6361293&amp;loc=d3e6676-107765<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_InventoryNet</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_Liabilities">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.19-26)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_Liabilities</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LiabilitiesAndStockholdersEquity">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Total of all Liabilities and Stockholders' Equity items (or Partners' Capital, as applicable), including the portion of equity attributable to noncontrolling interests, if any.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.32)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 03<br><br><br><br> -Paragraph 25<br><br><br><br> -Article 7<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 32<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LiabilitiesAndStockholdersEquity</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LiabilitiesCurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.21)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 21<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LiabilitiesCurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LiabilitiesCurrentAbstract">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LiabilitiesCurrentAbstract</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LongTermDebtCurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Carrying amount of long-term debt, net of unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.19,20)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 20<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 19<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LongTermDebtCurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LongTermDebtNoncurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.22)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 22<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LongTermDebtNoncurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherAssetsCurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Aggregate carrying amount, as of the balance sheet date, of current assets not separately disclosed in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.8)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 8<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_OtherAssetsCurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherAssetsNoncurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the balance sheet. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.17)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 17<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_OtherAssetsNoncurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherLiabilitiesNoncurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.24)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 24<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_OtherLiabilitiesNoncurrent</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PreferredStockValue">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 29<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.28)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher AICPA<br><br><br><br> -Name Accounting Principles Board Opinion (APB)<br><br><br><br> -Number 12<br><br><br><br> -Paragraph 10<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br><br><br> -Number 129<br><br><br><br> -Paragraph 2, 3, 4, 5, 6, 7, 8<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 04<br><br><br><br> -Article 3<br><br><br><br><br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 505<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.3-04)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 03<br><br><br><br> -Paragraph 8<br><br><br><br> -Article 7<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br><br><br> -Number 12<br><br><br><br> -Paragraph 5<br><br><br><br> -Subparagraph b, c<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 360<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 50<br><br><br><br> -Paragraph 1<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6391035&amp;loc=d3e2868-110229<br><br><br><br><br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.13)<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 13<br><br><br><br> -Subparagraph a<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
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                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_PropertyPlantAndEquipmentNet</nobr></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The cumulative amount of the reporting entity's undistributed earnings or deficit.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 210<br><br><br><br> -SubTopic 10<br><br><br><br> -Section S99<br><br><br><br> -Paragraph 1<br><br><br><br> -Subparagraph (SX 210.5-02.31(a)(3))<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher AICPA<br><br><br><br> -Name Accounting Principles Board Opinion (APB)<br><br><br><br> -Number 12<br><br><br><br> -Paragraph 10<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 02<br><br><br><br> -Paragraph 31<br><br><br><br> -Article 5<br><br><br><br><br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher SEC<br><br><br><br> -Name Regulation S-X (SX)<br><br><br><br> -Number 210<br><br><br><br> -Section 04<br><br><br><br> -Article 3<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                    <td><nobr>us-gaap_RetainedEarningsAccumulatedDeficit</nobr></td>
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                    <td>us-gaap_</td>
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_StockholdersEquityAbstract</nobr></td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest">
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 810<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 45<br><br><br><br> -Paragraph 16<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=7656940&amp;loc=SL4568740-111683<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher AICPA<br><br><br><br> -Name Accounting Research Bulletin (ARB)<br><br><br><br> -Number 51<br><br><br><br> -Paragraph A3<br><br><br><br> -Appendix A<br><br><br><br><br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher AICPA<br><br><br><br> -Name Accounting Research Bulletin (ARB)<br><br><br><br> -Number 51<br><br><br><br> -Paragraph 26<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 810<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 55<br><br><br><br> -Paragraph 4I<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=18733213&amp;loc=SL4590271-111686<br><br><br><br><br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 810<br><br><br><br> -SubTopic 10<br><br><br><br> -Section 45<br><br><br><br> -Paragraph 15<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=7656940&amp;loc=SL4568447-111683<br><br><br><br><br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher AICPA<br><br><br><br> -Name Accounting Research Bulletin (ARB)<br><br><br><br> -Number 51<br><br><br><br> -Paragraph 25<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest</nobr></td>
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                    <td>us-gaap_</td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_TreasuryStockValue">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name Accounting Standards Codification<br><br><br><br> -Topic 505<br><br><br><br> -SubTopic 30<br><br><br><br> -Section 50<br><br><br><br> -Paragraph 4<br><br><br><br> -URI http://asc.fasb.org/extlink&amp;oid=6405834&amp;loc=d3e23315-112656<br><br><br><br><br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br><br><br> -Publisher FASB<br><br><br><br> -Name FASB Technical Bulletin (FTB)<br><br><br><br> -Number 85-6<br><br><br><br> -Paragraph 3<br><br><br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br><br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
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                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
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                    <td>debit</td>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0ECHAG">
      <tr>
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          <div style="width: 200px;"><strong>Business Segments - Income (loss) from Continuing Operations Before Income Taxes (Detail) (USD $)<br>In Thousands, unless otherwise specified</strong></div>
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        <th class="th" colspan="4">3 Months Ended</th>
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      <tr>
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          <div>Mar. 31, 2013</div>
        </th>
        <th class="th" colspan="2">
          <div>Mar. 31, 2012</div>
        </th>
      </tr>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems', window );"><strong>Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="text">&#xA0;<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OperatingIncomeLoss', window );">Operating income (loss)</a></td>
        <td class="nump">$ 94,932<span></span></td>
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        <td class="nump">$ 157,664<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_GainLossOnSaleOfPropertyPlantEquipment', window );">Net gain (loss) on asset disposals</a></td>
        <td class="num">(125)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"><sup>[1]</sup></td>
        <td class="nump">2,400<span></span></td>
        <td class="fn" style="border-bottom: 0px;"><sup>[1]</sup></td>
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      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_InvestmentIncomeInterest', window );">Interest income</a></td>
        <td class="nump">173<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">54<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_InterestExpense', window );">Interest expense</a></td>
        <td class="num">(6,766)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(4,582)<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OtherNonoperatingIncome', window );">Other</a></td>
        <td class="nump">19<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">55<span></span></td>
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      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments', window );">Income before income taxes</a></td>
        <td class="nump">88,358<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">153,191<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="rh">
        <td class="pl" style="border-bottom: 0px;" valign="top">
          <div class="a">Operating Segments</div>
        </td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems', window );"><strong>Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OperatingIncomeLoss', window );">Operating income (loss)</a></td>
        <td class="nump">107,305<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">166,076<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="rh">
        <td class="pl" style="border-bottom: 0px;" valign="top">
          <div class="a">Operating Segments | Contract Drilling</div>
        </td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems', window );"><strong>Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OperatingIncomeLoss', window );">Operating income (loss)</a></td>
        <td class="nump">72,549<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">111,771<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="rh">
        <td class="pl" style="border-bottom: 0px;" valign="top">
          <div class="a">Operating Segments | Pressure Pumping</div>
        </td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems', window );"><strong>Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OperatingIncomeLoss', window );">Operating income (loss)</a></td>
        <td class="nump">28,515<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">46,787<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="rh">
        <td class="pl" style="border-bottom: 0px;" valign="top">
          <div class="a">Operating Segments | Oil and Natural Gas</div>
        </td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems', window );"><strong>Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OperatingIncomeLoss', window );">Operating income (loss)</a></td>
        <td class="nump">6,241<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">7,518<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="rh">
        <td class="pl" style="border-bottom: 0px;" valign="top">
          <div class="a">Corporate and other</div>
        </td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems', window );"><strong>Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OperatingIncomeLoss', window );">Operating income (loss)</a></td>
        <td class="num">$ (12,248)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">$ (10,812)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr>
        <td colspan="5"></td>
      </tr>
      <tr>
        <td colspan="5">
          <table class="outerFootnotes" width="100%">
            <tr class="outerFootnote">
              <td style="vertical-align: top;" valign="top">[1]</td>
              <td style="vertical-align: top;" valign="top">Net gains or losses associated with the disposal of assets relate to corporate strategy decisions of the executive management group. Accordingly, the related gains or losses have been separately presented and excluded from the results of specific segments.</td>
            </tr>
          </table>
        </td>
      </tr>
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        <tr>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain (loss).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 235<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.4-08.(h)(1)(i))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6881521&amp;loc=d3e23780-122690<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 08<br><br> -Paragraph h<br><br> -Subparagraph 1(i)<br><br> -Article 4<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments</nobr></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The cost of borrowed funds accounted for as interest that was charged against earnings during the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Paragraph 9<br><br> -Article 9<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher OTS<br><br> -Name Federal Regulation (FR)<br><br> -Number Title 12<br><br> -Section 563c.102<br><br> -Paragraph 9<br><br> -Chapter V<br><br> -Subsection II<br><br> -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy.  It will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 34<br><br> -Paragraph 21<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 835<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6450988&amp;loc=d3e26243-108391<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 942<br><br> -SubTopic 225<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.9-04.9)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6879574&amp;loc=d3e536633-122882<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Income derived from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time value of money or transactions in which the payments are for the use or forbearance of money.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 115<br><br> -Paragraph 14<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 7<br><br> -Article 5<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.7(b))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_InvestmentIncomeInterest</nobr></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The net result for the period of deducting operating expenses from operating revenues.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The aggregate amount of other income amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.7)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 7<br><br> -Article 5<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Audit and Accounting Guide (AAG)<br><br> -Number AAG-BRD<br><br> -Paragraph 80<br><br> -Subparagraph Exhibit 4-4<br><br> -IssueDate 2006-05-01<br><br> -Chapter 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_OtherNonoperatingIncome</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                    <td>duration</td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
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                    <td>na</td>
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<DOCUMENT>
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<SEQUENCE>41
<FILENAME>R6.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EJF">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $)<br>In Thousands, unless otherwise specified</strong></div>
        </th>
        <th class="th" colspan="2">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th">
          <div>Mar. 31, 2012</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OtherComprehensiveIncomeLossTax', window );">Other comprehensive income (loss), taxes</a></td>
        <td class="nump">$ 0<span></span></td>
        <td class="nump">$ 0<span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherComprehensiveIncomeLossTax">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Tax effect of other comprehensive income (loss) attributable to both parent entity and noncontrolling interest.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 220<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 12<br><br> -URI http://asc.fasb.org/extlink&amp;oid=20435746&amp;loc=d3e640-108580<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 31<br><br> -Article 5<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Article 3<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 10<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 130<br><br> -Paragraph 24<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 109<br><br> -Paragraph 36<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 20<br><br> -Section 45<br><br> -Paragraph 11<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=18498875&amp;loc=d3e39076-109324<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 38<br><br> -Subparagraph c(3)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_OtherComprehensiveIncomeLossTax</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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<DOCUMENT>
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<SEQUENCE>42
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<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EDSAE">
      <tr>
        <th class="tl" colspan="1" rowspan="1">
          <div style="width: 200px;"><strong>Estimated Fair Value of Outstanding Debt Balances (Detail) (USD $)<br>In Thousands, unless otherwise specified</strong></div>
        </th>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th">
          <div>Dec. 31, 2012</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems', window );"><strong>Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LongTermDebt', window );">Carrying value of Debt</a></td>
        <td class="nump">$ 697,500<span></span></td>
        <td class="nump">$ 698,750<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DebtInstrumentFairValue', window );">Fair value of Debt</a></td>
        <td class="nump">722,585<span></span></td>
        <td class="nump">738,622<span></span></td>
      </tr>
      <tr class="rh">
        <td class="pl" style="border-bottom: 0px;" valign="top">
          <div class="a">Term Loan Facility</div>
        </td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems', window );"><strong>Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LongTermDebt', window );">Carrying value of Debt</a></td>
        <td class="nump">97,500<span></span></td>
        <td class="nump">98,750<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DebtInstrumentFairValue', window );">Fair value of Debt</a></td>
        <td class="nump">97,500<span></span></td>
        <td class="nump">98,750<span></span></td>
      </tr>
      <tr class="rh">
        <td class="pl" style="border-bottom: 0px;" valign="top">
          <div class="a">Series A Senior Notes, 4.97 Percent</div>
        </td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems', window );"><strong>Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LongTermDebt', window );">Carrying value of Debt</a></td>
        <td class="nump">300,000<span></span></td>
        <td class="nump">300,000<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DebtInstrumentFairValue', window );">Fair value of Debt</a></td>
        <td class="nump">321,743<span></span></td>
        <td class="nump">329,281<span></span></td>
      </tr>
      <tr class="rh">
        <td class="pl" style="border-bottom: 0px;" valign="top">
          <div class="a">Series B Senior Notes, 4.27 Percent</div>
        </td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems', window );"><strong>Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LongTermDebt', window );">Carrying value of Debt</a></td>
        <td class="nump">300,000<span></span></td>
        <td class="nump">300,000<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DebtInstrumentFairValue', window );">Fair value of Debt</a></td>
        <td class="nump">$ 303,342<span></span></td>
        <td class="nump">$ 310,591<span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentFairValue">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 825<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 10<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7491637&amp;loc=d3e13433-108611<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 825<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 12<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7491637&amp;loc=d3e13476-108611<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_DebtInstrumentFairValue</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
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                </table>
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          </td>
        </tr>
      </table>
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
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                    <td>duration</td>
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          </td>
        </tr>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LongTermDebt">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 942<br><br> -SubTopic 210<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.9-03.16)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6876686&amp;loc=d3e534808-122878<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 16<br><br> -Article 9<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 16<br><br> -Article 7<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 20, 22<br><br> -Article 5<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.22)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 944<br><br> -SubTopic 210<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.7-03.16)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6879938&amp;loc=d3e572229-122910<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_LongTermDebt</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
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            </div>
          </td>
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  <head>
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    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EZBAE">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Stock Option Activity (Detail) (USD $)<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward', window );"><strong>Underlying Shares</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber', window );">Outstanding at beginning of period</a></td>
        <td class="nump">7,827,195<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod', window );">Granted</a></td>
        <td class="nump">60,000<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised', window );">Exercised</a></td>
        <td class="num">(1,150,000)<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod', window );">Cancelled</a></td>
        <td class="text">&nbsp;&nbsp;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod', window );">Expired</a></td>
        <td class="text">&nbsp;&nbsp;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber', window );">Outstanding at end of period</a></td>
        <td class="nump">6,737,195<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber', window );">Exercisable at end of period</a></td>
        <td class="nump">5,738,036<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract', window );"><strong>Weighted Average Exercise Price</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice', window );">Outstanding at beginning of period</a></td>
        <td class="nump">$ 20.35<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice', window );">Granted</a></td>
        <td class="nump">$ 18.63<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice', window );">Exercised</a></td>
        <td class="nump">$ 16.19<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice', window );">Cancelled</a></td>
        <td class="text">&nbsp;&nbsp;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice', window );">Expired</a></td>
        <td class="text">&nbsp;&nbsp;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice', window );">Outstanding at end of period</a></td>
        <td class="nump">$ 21.04<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice', window );">Exercisable at end of period</a></td>
        <td class="nump">$ 21.49<span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(1)(iii)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(1)(c), d(2)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(1)(iii)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(1)(c)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:perShareItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(1)(iv)(4)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(1)(g)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(1)(iv)(3)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(1)(f)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Net number of share options (or share units) granted during the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(1)(iv)(1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(1)(d)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(1)(b)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(1)(i)-(ii)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(1)(a)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
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                  <tr>
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                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
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            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(1)(i)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(1)(a)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:perShareItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Weighted average price at which option holders acquired shares when converting their stock options into shares.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:perShareItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:perShareItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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            </div>
          </td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:perShareItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:perShareItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Number of share options (or share units) exercised during the current period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.28,29)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(1)(iv)(2)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Article 3<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 29, 30<br><br> -Article 5<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21463-112644<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.3-04)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised</nobr></td>
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                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Recently Issued Accounting Standards<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock', window );">Recently Issued Accounting Standards</a></td>
        <td class="text"><div>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%">
<tr>
<td valign="top" width="4%" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>13.</b></font></td>
<td valign="top" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Recently Issued
Accounting Standards</b></font></td>
</tr>
</table>
<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">In February
2013, the FASB issued an accounting standards update that requires
additional disclosures regarding reclassifications out of
accumulated other comprehensive income. This requirement is
effective for fiscal years, and interim periods within those years,
beginning after December&#xA0;15, 2012, and became effective for
the Company in the quarter ended March&#xA0;31, 2013. The adoption
of this update did not have a material impact on the
Company&#x2019;s disclosures included in its consolidated financial
statements.The Company includes in accumulated other comprehensive
income the cumulative translation adjustment of its foreign
subsidiary.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">In February
2013, the FASB issued an accounting standards update to provide
guidance for the recognition, measurement, and disclosure of
obligations resulting from joint and several liability arrangements
for which the total amount of the obligation within the scope of
the update is fixed at the reporting date, except for obligations
addressed within existing guidance in U.S. GAAP. The guidance
requires an entity to measure those obligations as the sum of the
amount the reporting entity agreed to pay on the basis of its
arrangement among its co-obligors and any additional amount the
reporting entity expects to pay on behalf of its co-obligors. The
update also requires an entity to disclose the nature and amount of
the obligation as well as other information about those
obligations. The requirements in this update are effective during
interim and annual periods beginning after December&#xA0;15, 2013.
The adoption of this update is not expected to have a material
impact on the Company&#x2019;s consolidated financial
statements.</font></p>
</div><span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The entire disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 270<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.10-01.(b)(6))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6958853&amp;loc=d3e46468-122699<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 270<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 13<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6372559&amp;loc=d3e765-108305<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 250<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6801783&amp;loc=d3e22580-107794<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 01<br><br> -Paragraph b<br><br> -Subparagraph 6<br><br> -Article 10<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Accounting Change<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6503790<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Retrospective Application<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6523989<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 250<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6801783&amp;loc=d3e22499-107794<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 250<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 3<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6801783&amp;loc=d3e22583-107794<br><br><br><br>Reference 9: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 270<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 12<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6372559&amp;loc=d3e725-108305<br><br><br><br>Reference 10: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Indirect Effects of a Change in Accounting Principle<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6515603<br><br><br><br>Reference 11: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Direct Effects of a Change in Accounting Principle<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6510796<br><br><br><br>Reference 12: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Change in Accounting Principle<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6507316<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EJCAE">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Restricted Stock Activity (Detail) (Restricted Stock Awards, USD $)<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
      </tr>
      <tr class="rh">
        <td class="pl" style="border-bottom: 0px;" valign="top">
          <div class="a">Restricted Stock Awards</div>
        </td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward', window );"><strong>Shares</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber', window );">Outstanding at beginning of period</a></td>
        <td class="nump">1,279,146<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod', window );">Granted</a></td>
        <td class="nump">18,000<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod', window );">Vested</a></td>
        <td class="num">(56,668)<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod', window );">Forfeited</a></td>
        <td class="num">(15,570)<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber', window );">Outstanding at end of period</a></td>
        <td class="nump">1,224,908<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract', window );"><strong>Weighted Average Grant Date Fair Value</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue', window );">Outstanding at beginning of period</a></td>
        <td class="nump">$ 20.03<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue', window );">Granted</a></td>
        <td class="nump">$ 18.63<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue', window );">Vested</a></td>
        <td class="nump">$ 22.20<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue', window );">Forfeited</a></td>
        <td class="nump">$ 19.68<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue', window );">Outstanding at end of period</a></td>
        <td class="nump">$ 19.92<span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(1)(iv)(3)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(e)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)(iii)(3)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:perShareItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)(iii)(1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(c)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)(iii)(1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph c(1)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(c)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:perShareItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)(i)-(ii)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(b)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(a)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)(i)-(ii)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(b)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(a)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:perShareItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)(iii)(2)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(d)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)(iii)(2)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph b(2)(d)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:perShareItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
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            </div>
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        </tr>
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<DOCUMENT>
<TYPE>XML
<SEQUENCE>46
<FILENAME>R24.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0E2DAC">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Stock-based Compensation (Tables)<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock', window );">Weighted-Average Assumptions Used to Estimate Grant Date Fair Values for Stock Options Granted</a></td>
        <td class="text"><div>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Weighted-average assumptions used to estimate the grant date
fair values for stock options granted for the three month periods
ended March&#xA0;31, 2013 and 2012 follow:</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="84%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="6" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Three&#xA0;Months&#xA0;Ended</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>March&#xA0;
31,</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Volatility</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">46.19</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">%&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">48.72</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">%&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Expected term (in
years)</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5.00</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5.00</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Dividend yield</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1.07</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">%&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1.00</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">%&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Risk-free interest
rate</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.72</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">%&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.83</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">%&#xA0;</font></td>
</tr>
</table>
</div><span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock', window );">Stock Option Activity</a></td>
        <td class="text"><div>
<p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Stock option
activity from January&#xA0;1, 2013 to March&#xA0;31, 2013
follows:</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="76%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Underlying</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Shares</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Weighted</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Average</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Exercise</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Price</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Outstanding at
January&#xA0;1, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">7,827,195</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">20.35</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Granted</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">60,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">18.63</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Exercised</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(1,150,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">16.19</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Cancelled</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Expired</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Outstanding at
March&#xA0;31, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">6,737,195</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">21.04</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Exercisable at
March&#xA0;31, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,738,036</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">21.49</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
</table>
</div><span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock', window );">Restricted Stock Activity</a></td>
        <td class="text"><div>
<p style="MARGIN-TOP: 18px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Restricted
stock activity from January&#xA0;1, 2013 to March&#xA0;31, 2013
follows:</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="76%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Shares</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Weighted</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Average</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Grant&#xA0;Date</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Fair
Value</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Non-vested restricted stock
outstanding at January&#xA0;1, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1,279,146</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">20.03</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Granted</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">18,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">18.63</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Vested</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(56,668</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">22.20</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Forfeited</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(15,570</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">19.68</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Non-vested restricted stock
outstanding at March 31, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1,224,908</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">19.92</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
</table>
</div><span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock', window );">Restricted Stock Unit Activity</a></td>
        <td class="text"><div>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Restricted
stock unit activity from January&#xA0;1, 2013 to March&#xA0;31,
2013 follows:</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="79%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Shares</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Weighted</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Average</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Grant&#xA0;Date</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Fair&#xA0;Value</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Non-vested restricted stock
units outstanding at January&#xA0;1, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">17,670</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">20.08</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Granted</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Vested</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Forfeited</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Non-vested restricted stock
units outstanding at March 31, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">17,670</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">20.08</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
</table>
</div><span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock', window );">Stock-Settled Performance Units</a></td>
        <td class="text"><div>
<p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The total
target number of shares with respect to the Stock-Settled
Performance Units is set forth below:</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="84%" align="center">
<tr>
<td width="64%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2011</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2010</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Target number of
shares</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">192,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">144,375</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">178,750</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
</table>
</div><span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueTableTextBlock', window );">Fair value of Stock-Settled Performance Units</a></td>
        <td class="text"><div>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The fair value
of the Stock-Settled Performance Units is set forth below (in
thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="84%" align="center">
<tr>
<td width="64%"></td>
<td valign="bottom" width="8%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="8%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="8%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2011</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2010</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Fair value at date of
grant</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">3,065</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,569</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">3,117</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
</table>
</div><span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_ShareBasedCompensationExpenseByAwardTypeTextBlock', window );">Compensation Expense Associated with Stock-Settled Performance Units</a></td>
        <td class="text"><div>
<p><font size="2">Compensation expense associated with the
Stock-Settled Performance Units is shown below (in
thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="84%" align="center">
<!-- Begin Table Head -->
<tr>
<td width="64%"></td>
<td valign="bottom" width="9%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="9%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="9%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2011</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2010</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
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<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Three months ended
March&#xA0;31, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">255</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">464</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">260</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Three months ended
March&#xA0;31, 2012</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">NA</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">464</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">260</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Share Based Compensation Arrangement By Share Based Payment Award Fair Value [Table Text Block]</p>
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                <p>No definition available.</p>
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                <p>Share Based Compensation Expense by Award Type [Table Text Block]</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Tabular disclosure of the changes in outstanding nonvested performance-based units.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br></p>
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                <table border="0" cellpadding="0" cellspacing="0">
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                    <td><strong> Name:</strong></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Tabular disclosure of the changes in outstanding nonvested restricted stock units.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br></p>
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                    <td><strong> Name:</strong></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Tabular disclosure of the changes in outstanding nonvested shares.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(2)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br></p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br></p>
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                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock</nobr></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (f)(2)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br></p>
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                <table border="0" cellpadding="0" cellspacing="0">
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      <tr>
        <th class="tl" colspan="1" rowspan="1">
          <div style="width: 200px;"><strong>Consolidated Statement Of Changes In Stockholders' Equity (USD $)<br>In Thousands, except Share data</strong></div>
        </th>
        <th class="th">
          <div>Total</div>
        </th>
        <th class="th">
          <div>Common Stock</div>
        </th>
        <th class="th">
          <div>Additional Paid-in Capital</div>
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        <td class="nump">$ 2,640,657<span></span></td>
        <td class="nump">$ 1,841<span></span></td>
        <td class="nump">$ 863,558<span></span></td>
        <td class="nump">$ 2,548,542<span></span></td>
        <td class="nump">$ 21,767<span></span></td>
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        <td class="nump">56,230<span></span></td>
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        <td class="num">(2,303)<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="text">&#xA0;<span></span></td>
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        <td class="text">&#xA0;<span></span></td>
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        <td class="nump">18,622<span></span></td>
        <td class="nump">11<span></span></td>
        <td class="nump">18,611<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="nump">5,903<span></span></td>
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        <td class="nump">2,737<span></span></td>
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        <td class="num">(7,312)<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="num">(7,312)<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="num">(15,201)<span></span></td>
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        <td class="nump">$ 2,699,333<span></span></td>
        <td class="nump">$ 1,852<span></span></td>
        <td class="nump">$ 890,809<span></span></td>
        <td class="nump">$ 2,597,460<span></span></td>
        <td class="nump">$ 19,464<span></span></td>
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        <td class="nump">185,212,330<span></span></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 20<br><br> -Section 55<br><br> -Paragraph 13<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6576910&amp;loc=d3e11178-113907<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph 64<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 35<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415241&amp;loc=d3e4534-113899<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A91<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5047-113901<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 20<br><br> -Section 55<br><br> -Paragraph 12<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6576910&amp;loc=d3e11149-113907<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph 39<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                    <td><strong> Name:</strong></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Adjustment to additional paid in capital related to the net effect of excess tax benefits and tax deficiencies associated with an equity-based compensation plan other than an employee stock ownership plan (ESOP).</p>
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                <p>No definition available.</p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.29)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 30<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_CommonStockSharesIssued</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DividendsCommonStockCash">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Equity impact of common stock cash dividends declared by an entity during the period. This element includes paid and unpaid dividends declared during the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Article 3<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.3-04)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_DividendsCommonStockCash</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Net of tax and reclassification adjustments of the change in the balance sheet adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity. Also includes the following: gain (loss) on foreign currency forward exchange contracts; foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; and gain (loss) on a derivative instrument or nonderivative financial instrument that may give rise to a foreign currency transaction gain (loss) that has been designated and qualified as a hedging instrument for hedging of the foreign currency exposure of a net investment in a foreign operation.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 220<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 10A<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=20435746&amp;loc=SL7669646-108580<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 830<br><br> -SubTopic 30<br><br> -Section 45<br><br> -Paragraph 20<br><br> -Subparagraph (b,c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6915805&amp;loc=d3e32211-110900<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProfitLoss">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph A1, A4, A5<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 19<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7656940&amp;loc=SL4569616-111683<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 29<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 5<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 55<br><br> -Paragraph 4K<br><br> -URI http://asc.fasb.org/extlink&amp;oid=18733213&amp;loc=SL4591552-111686<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1A<br><br> -Subparagraph (a),(c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=18733093&amp;loc=SL4573702-111684<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 38<br><br> -Subparagraph c(1)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 38<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 9: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 55<br><br> -Paragraph 4J<br><br> -URI http://asc.fasb.org/extlink&amp;oid=18733213&amp;loc=SL4591551-111686<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ProfitLoss</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 16<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7656940&amp;loc=SL4568740-111683<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph A3<br><br> -Appendix A<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 26<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 55<br><br> -Paragraph 4I<br><br> -URI http://asc.fasb.org/extlink&amp;oid=18733213&amp;loc=SL4590271-111686<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 15<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7656940&amp;loc=SL4568447-111683<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 25<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Number of shares related to Restricted Stock Award forfeited during the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 129<br><br> -Paragraph 4, 5<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 29, 30<br><br> -Article 5<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 10<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21463-112644<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.3-04)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 129<br><br> -Paragraph 4, 5<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 10<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21463-112644<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.3-04)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Number of share options (or share units) exercised during the current period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.28,29)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)(1)(iv)(2)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Article 3<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 29, 30<br><br> -Article 5<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21463-112644<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.3-04)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Value of stock related to Restricted Stock Awards forfeited during the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.3-04)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 29, 30, 31<br><br> -Article 5<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 10<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Article 3<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21463-112644<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Aggregate value of stock related to Restricted Stock Awards issued during the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.3-04)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 29, 30, 31<br><br> -Article 5<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 10<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Article 3<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21463-112644<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Value of stock issued as a result of the exercise of stock options.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.3-04)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.29-31)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 10<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 29, 30, 31<br><br> -Article 5<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Article 3<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21463-112644<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_TreasuryStockValueAcquiredCostMethod">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.3-04)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 30<br><br> -Section 45<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6405813&amp;loc=d3e23239-112655<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 10<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 43<br><br> -Section B<br><br> -Paragraph 7<br><br> -Subparagraph b<br><br> -Chapter 1<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Article 3<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21463-112644<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_TreasuryStockValueAcquiredCostMethod</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
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            </div>
          </td>
        </tr>
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  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EWOAC">
      <tr>
        <th class="tl" colspan="1" rowspan="1">
          <div style="width: 200px;"><strong>Consolidated Balance Sheets (Parenthetical) (USD $)<br>In Thousands, except Share data, unless otherwise specified</strong></div>
        </th>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th">
          <div>Dec. 31, 2012</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent', window );">Accounts receivable, allowance for doubtful accounts</a></td>
        <td class="nump">$ 3,582<span></span></td>
        <td class="nump">$ 3,513<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PreferredStockParOrStatedValuePerShare', window );">Preferred stock, par value</a></td>
        <td class="nump">$ 0.01<span></span></td>
        <td class="nump">$ 0.01<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PreferredStockSharesAuthorized', window );">Preferred stock, authorized</a></td>
        <td class="nump">1,000,000<span></span></td>
        <td class="nump">1,000,000<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_PreferredStockSharesIssued', window );">Preferred stock, shares issued</a></td>
        <td class="nump">0<span></span></td>
        <td class="nump">0<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CommonStockParOrStatedValuePerShare', window );">Common stock, par value</a></td>
        <td class="nump">$ 0.01<span></span></td>
        <td class="nump">$ 0.01<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CommonStockSharesAuthorized', window );">Common stock, authorized</a></td>
        <td class="nump">300,000,000<span></span></td>
        <td class="nump">300,000,000<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CommonStockSharesIssued', window );">Common stock, issued</a></td>
        <td class="nump">185,212,330<span></span></td>
        <td class="nump">184,059,900<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CommonStockSharesOutstanding', window );">Common stock, outstanding</a></td>
        <td class="nump">146,427,968<span></span></td>
        <td class="nump">145,913,162<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_TreasuryStockShares', window );">Treasury stock, shares</a></td>
        <td class="nump">38,784,362<span></span></td>
        <td class="nump">38,146,738<span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 310<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 4<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7512638&amp;loc=d3e5074-111524<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 4<br><br> -Article 5<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.4)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockParOrStatedValuePerShare">
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Face amount or stated value of common stock per share; generally not indicative of the fair market value per share.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 129<br><br> -Paragraph 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.29)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 30<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_CommonStockParOrStatedValuePerShare</nobr></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The maximum number of common shares permitted to be issued by an entity's charter and bylaws.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.29)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 30<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_CommonStockSharesAuthorized</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.29)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 30<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_CommonStockSharesIssued</nobr></td>
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                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                    <td><strong> Period Type:</strong></td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockSharesOutstanding">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.3-04)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.29)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 10<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 30<br><br> -Article 5<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Article 3<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21463-112644<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_CommonStockSharesOutstanding</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PreferredStockParOrStatedValuePerShare">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Face amount or stated value per share of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer); generally not indicative of the fair market value per share.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 129<br><br> -Paragraph 2, 3, 4, 5, 6, 7, 8<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 10<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 29<br><br> -Article 5<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.28)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_PreferredStockParOrStatedValuePerShare</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:perShareItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
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                </table>
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          </td>
        </tr>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PreferredStockSharesAuthorized">
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 29<br><br> -Article 5<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.28)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 129<br><br> -Paragraph 2, 3, 4, 5, 6, 7, 8<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_PreferredStockSharesAuthorized</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PreferredStockSharesIssued">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 29<br><br> -Article 5<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.28)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_PreferredStockSharesIssued</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:sharesItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_TreasuryStockShares">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.28,29)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 29, 30<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_TreasuryStockShares</nobr></td>
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                    <td>xbrli:sharesItemType</td>
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                    <td>na</td>
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<DESCRIPTION>IDEA: XBRL DOCUMENT
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Long Term Debt<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_LongTermDebtTextBlock', window );">Long Term Debt</a></td>
        <td class="text"><div>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%">
<tr>
<td valign="top" width="4%" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>8.</b></font></td>
<td valign="top" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Long Term
Debt</b></font></td>
</tr>
</table>
<!-- xbrl,body -->
<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2"><i>Credit
Facilities -</i> On September&#xA0;27, 2012, the Company entered
into a Credit Agreement (the &#x201C;Credit Agreement&#x201D;) with
Wells Fargo Bank, N.A., as administrative agent, letter of credit
issuer, swing line lender and lender, and each of the other lenders
party thereto. The Credit Agreement is a committed senior unsecured
credit facility that includes a revolving credit facility and a
term loan facility.</font></p>
<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The revolving
credit facility permits aggregate borrowings of up to $500 million
outstanding at any time. The revolving credit facility contains a
letter of credit facility that is limited to $150 million and a
swing line facility that is limited to $40 million, in each case
outstanding at any time.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The term loan
facility provides for a loan of $100 million, which was drawn on
December&#xA0;24, 2012. The term loan facility is payable in
quarterly principal installments which
commenced&#xA0;December&#xA0;27, 2012. The installment amounts vary
from 1.25% of the original principal amount for each of the first
four quarterly installments, 2.50% of the original principal amount
for each of the subsequent eight quarterly installments, 5.00% of
the original principal amount for the subsequent four quarterly
installments and 13.75% of the original principal amount for the
final four quarterly installments.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Subject to
customary conditions, the Company may request that the
lenders&#x2019; aggregate commitments with respect to the revolving
credit facility and/or the term loan facility be increased by up to
$100 million, not to exceed total commitments of $700 million. The
maturity date under the Credit Agreement is September&#xA0;27, 2017
for both the revolving facility and the term facility.</font></p>
<p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px; FONT-SIZE: 1px">
&#xA0;</p>
<p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Loans under the
Credit Agreement bear interest by reference, at the Company&#x2019;s
election, to the LIBOR rate or base rate, provided, that swing line
loans bear interest by reference only to the base rate. The
applicable margin on LIBOR rate loans varies from 2.25% to 3.25%
and the applicable margin on base rate loans varies from 1.25% to
2.25%, in each case determined based upon the Company&#x2019;s debt
to capitalization ratio. As of March&#xA0;31, 2013, the applicable
margin on LIBOR rate loans was 2.25% and the applicable margin on
base rate loans was 1.25%. A letter of credit fee is payable by the
Company equal to the applicable margin for LIBOR rate loans times
the daily amount available to be drawn under outstanding letters of
credit. The commitment fee rate payable to the lenders for the
unused portion of the credit facility is 0.50%.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Each domestic
subsidiary of the Company other than immaterial subsidiaries has
unconditionally guaranteed all existing and future indebtedness and
liabilities of the other guarantors and the Company arising under
the Credit Agreement and other loan documents. Such guarantees also
cover obligations of the Company and any subsidiary of the Company
arising under any interest rate swap contract with any person while
such person is a lender under the Credit Agreement.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The Credit
Agreement requires compliance with two financial covenants. The
Company must not permit its debt to capitalization ratio to exceed
45%. The Credit Agreement generally defines the debt to
capitalization ratio as the ratio of (a)&#xA0;total borrowed money
indebtedness to (b)&#xA0;the sum of such indebtedness plus
consolidated net worth, with consolidated net worth determined as
of the last day of the most recently ended fiscal quarter. The
Company also must not permit the interest coverage ratio as of the
last day of a fiscal quarter to be less than 3.00 to 1.00. The
Credit Agreement generally defines the interest coverage ratio as
the ratio of earnings before interest, taxes, depreciation and
amortization (&#x201C;EBITDA&#x201D;) of the four prior fiscal
quarters to interest charges for the same period. The Company was
in compliance with these covenants at March&#xA0;31, 2013. The
Credit Agreement also contains customary representations,
warranties and affirmative and negative covenants.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Events of
default under the Credit Agreement include failure to pay principal
or interest when due, failure to comply with the financial and
operational covenants, as well as a cross default event, loan
document enforceability event, change of control event and
bankruptcy and other insolvency events. If an event of default
occurs and is continuing, then a majority of the lenders have the
right, among others, to (i)&#xA0;terminate the commitments under
the Credit Agreement, (ii)&#xA0;accelerate and require the Company
to repay all the outstanding amounts owed under any loan document
(provided that in limited circumstances with respect to insolvency
and bankruptcy of the Company, such acceleration is automatic), and
(iii)&#xA0;require the Company to cash collateralize any
outstanding letters of credit.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">As of
March&#xA0;31, 2013, the Company had $97.5 million principal amount
outstanding under the term loan facility at an interest rate of
2.625% and no amounts outstanding under the revolving credit
facility. The Company had $39.8 million in letters of credit
outstanding at March&#xA0;31, 2013 and, as a result, had available
borrowing capacity of approximately $460 million at that
date.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2"><i>Senior Notes
&#x2013;</i> On October&#xA0;5, 2010, the Company completed the
issuance and sale of $300 million in aggregate principal amount of
its 4.97% Series A Senior Notes due October&#xA0;5, 2020 (the
&#x201C;Series A Notes&#x201D;) in a private placement. The Series A
Notes bear interest at a rate of 4.97%&#xA0;per annum. The Company
will pay interest on the Series A Notes on April&#xA0;5 and
October&#xA0;5 of each year. The Series A Notes will mature on
October&#xA0;5, 2020.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">On
June&#xA0;14, 2012, the Company completed the issuance and sale of
$300 million in aggregate principal amount of its 4.27% Series B
Senior Notes due June&#xA0;14, 2022 (the &#x201C;Series B
Notes&#x201D;) in a private placement. The Series B Notes bear
interest at a rate of 4.27%&#xA0;per annum. The Company will pay
interest on the Series B Notes on April&#xA0;5 and October&#xA0;5
of each year. The Series B Notes will mature on June&#xA0;14,
2022.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The Series A
Notes and Series B Notes are senior unsecured obligations of the
Company which rank equally in right of payment with all other
unsubordinated indebtedness of the Company. The Series A Notes and
Series B Notes are guaranteed on a senior unsecured basis by each
of the existing domestic subsidiaries of the Company other than
immaterial subsidiaries.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The Series A
Notes and Series B Notes are prepayable at the Company&#x2019;s
option, in whole or in part, provided that in the case of a partial
prepayment, prepayment must be in an amount not less than 5% of the
aggregate principal amount of the notes then outstanding, at any
time and from time to time at 100% of the principal amount prepaid,
plus accrued and unpaid interest to the prepayment date, plus a
&#x201C;make-whole&#x201D; premium as specified in the note purchase
agreements. The Company must offer to prepay the notes upon the
occurrence of any change of control. In addition, the Company must
offer to prepay the notes upon the occurrence of certain asset
dispositions if the proceeds therefrom are not timely reinvested in
productive assets. If any offer to prepay is accepted, the purchase
price of each prepaid note is 100% of the principal amount thereof,
plus accrued and unpaid interest thereon to the prepayment
date.</font></p>
<p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px; FONT-SIZE: 1px">
&#xA0;</p>
<p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The respective
note purchase agreements require compliance with two financial
covenants. The Company must not permit its debt to capitalization
ratio to exceed 50% at any time. The note purchase agreements
generally define the debt to capitalization ratio as the ratio of
(a)&#xA0;total borrowed money indebtedness to (b)&#xA0;the sum of
such indebtedness plus consolidated net worth, with consolidated
net worth determined as of the last day of the most recently ended
fiscal quarter. The Company also must not permit the interest
coverage ratio as of the last day of a fiscal quarter to be less
than 2.50 to 1.00. The note purchase agreements generally define
the interest coverage ratio as the ratio of EBITDA for the four
prior fiscal quarters to interest charges for that same period. The
Company was in compliance with these covenants at March&#xA0;31,
2013.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Events of
default under the note purchase agreements include failure to pay
principal or interest when due, failure to comply with the
financial and operational covenants, a cross default event, a
judgment in excess of a threshold event, the guaranty agreement
ceasing to be enforceable, the occurrence of certain ERISA events,
a change of control event and bankruptcy and other insolvency
events. If an event of default under the note purchase agreements
occurs and is continuing, then holders of a majority in principal
amount of the respective notes have the right to declare all the
notes then-outstanding to be immediately due and payable. In
addition, if the Company defaults in payments on any note, then
until such defaults are cured, the holder thereof may declare all
the notes held by it pursuant to the note purchase agreement to be
immediately due and payable.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The Company
incurred approximately $10.8 million in debt issuance costs during
2010 in connection with the previous credit agreement and the
Series A Notes. During the third quarter of 2012, $978,000 of these
costs were&#xA0;charged to interest expense due to the early
termination of the previous credit agreement. The Company incurred
approximately $7.6 million in debt issuance costs during 2012 in
connection with the Series B Notes and the Credit Agreement. These
costs were deferred and are recognized as interest expense over the
term of the underlying debt. Interest expense related to the
amortization of debt issuance costs was approximately $547,000 and
$604,000 for the three months ended March&#xA0;31, 2013 and
2012.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Presented below
is a schedule of the principal repayment requirements of long-term
debt by fiscal year as of March&#xA0;31, 2013 (in
thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="68%" align="center">
<!-- Begin Table Head -->
<tr>
<td width="87%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<!-- End Table Head --><!-- Begin Table Body -->
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Year ending
December&#xA0;31,</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">2014</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">10,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">2015</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">12,500</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">2016</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">28,750</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">2017</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">41,250</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">Thereafter</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">600,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">Total</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">697,500</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<!-- End Table Body --></table>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 18px">
&#xA0;</p>
<!-- xbrl,n --></div><span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LongTermDebtTextBlock">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The entire disclosure for long-term debt.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.22)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 22<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0E2CAE">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Document and Entity Information<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
        <th class="th" colspan="1"></th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th">
          <div>Apr. 25, 2013</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentInformationLineItems', window );"><strong>Document Information [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentType', window );">Document Type</a></td>
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        <td class="text">Mar. 31,
         2013<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentFiscalYearFocus', window );">Document Fiscal Year Focus</a></td>
        <td class="text">2013<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_DocumentFiscalPeriodFocus', window );">Document Fiscal Period Focus</a></td>
        <td class="text">Q1<span></span></td>
        <td class="text">&#xA0;<span></span></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
        <td class="text">PTEN<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
        <td class="text">PATTERSON UTI ENERGY INC<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="text">0000889900<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_CurrentFiscalYearEndDate', window );">Current Fiscal Year End Date</a></td>
        <td class="text">--12-31<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityFilerCategory', window );">Entity Filer Category</a></td>
        <td class="text">Large Accelerated Filer<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_EntityCommonStockSharesOutstanding', window );">Entity Common Stock, Shares Outstanding</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">146,889,903<span></span></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>If the value is true, then the document is an amendment to previously-filed/accepted document.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>dei_AmendmentFlag</nobr></td>
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          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>End date of current fiscal year in the format --MM-DD.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>dei_CurrentFiscalYearEndDate</nobr></td>
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                    <td>xbrli:gMonthDayItemType</td>
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          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>This is focus fiscal period of the document report. For a first quarter 2006 quarterly report, which may also provide financial information from prior periods, the first fiscal quarter should be given as the fiscal period focus. Values: FY, Q1, Q2, Q3, Q4, H1, H2, M9, T1, T2, T3, M8, CY.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>dei_DocumentFiscalYearFocus</nobr></td>
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                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>dei_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:gYearItemType</td>
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                    <td>duration</td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented.  If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>dei_DocumentPeriodEndDate</nobr></td>
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                    <td>dei_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:dateItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word "Other".</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>dei_DocumentType</nobr></td>
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                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>dei_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>dei:submissionTypeItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation 12B<br><br> -Number 240<br><br> -Section 12b<br><br> -Subsection 1<br><br><br><br></p>
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                  <tr>
                    <td><strong> Name:</strong></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Indicate whether the registrant is one of the following: (1) Large Accelerated Filer, (2) Accelerated Filer, (3) Non-accelerated Filer, (4) Smaller Reporting Company (Non-accelerated) or (5) Smaller Reporting Accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation 12B<br><br> -Number 240<br><br> -Section 12b<br><br> -Subsection 1<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>dei_EntityRegistrantName</nobr></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Trading symbol of an instrument as listed on an exchange.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                    <td><strong> Name:</strong></td>
                    <td><nobr>dei_TradingSymbol</nobr></td>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
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          <div style="width: 200px;"><strong>Commitments, Contingencies and Other Matters<br></strong></div>
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        <th class="th" colspan="1">3 Months Ended</th>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock', window );">Commitments, Contingencies and Other Matters</a></td>
        <td class="text"><div>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%">
<tr>
<td valign="top" width="4%" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>9.</b></font></td>
<td valign="top" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Commitments,
Contingencies and Other Matters</b></font></td>
</tr>
</table>
<!-- xbrl,body -->
<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">As of
March&#xA0;31, 2013, the Company maintained letters of credit in
the aggregate amount of $39.8 million for the benefit of various
insurance companies as collateral for retrospective premiums and
retained losses which could become payable under the terms of the
underlying insurance contracts. These letters of credit expire
annually at various times during the year and are typically
renewed. As of March&#xA0;31, 2013, no amounts had been drawn under
the letters of credit.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">As of
March&#xA0;31, 2013, the Company had commitments to purchase
approximately $128 million of major equipment for its drilling and
pressure pumping businesses.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The
Company&#x2019;s pressure pumping business has entered into
agreements to purchase minimum quantities of proppants and
chemicals from certain vendors. These agreements expire in 2016 and
2017. As of March&#xA0;31, 2013, the remaining obligation under
these agreements is approximately $35.0 million, of which materials
with a total purchase price of approximately $7.2 million are
expected to be delivered during the last three quarters of 2013. In
the event that the required minimum quantities are not purchased
during any contract year, the Company would be required to make a
liquidated damages payment to the respective vendor for any
shortfall.</font></p>
<p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px; FONT-SIZE: 1px">
&#xA0;</p>
<p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">In November of
2011, the Company&#x2019;s pressure pumping business entered into an
agreement with a proppant vendor to advance, on a non-revolving
basis, up to $12.0 million to such vendor to finance the
construction of certain processing facilities. This advance is
secured by the underlying processing facilities and bears interest
at an annual rate of 5.0%. Repayment of the advance is to be made
through discounts applied to purchases from the vendor and
repayment of all amounts advanced must be made no later than
October&#xA0;1, 2017. As of March&#xA0;31, 2013, advances of
approximately $11.8 million had been made under this agreement and
repayments of approximately $531,000 had been received resulting in
a balance outstanding of approximately $11.2 million.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The Company is
party to various legal proceedings arising in the normal course of
its business. The Company does not believe that the outcome of
these proceedings, either individually or in the aggregate, will
have a material adverse effect on its financial condition, results
of operations or cash flows.</font></p>
</div><span></span></td>
      </tr>
    </table>
    <div style="display: none;">
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The entire disclosure for commitments and contingencies.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 460<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 8<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6398077&amp;loc=d3e12565-110249<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 450<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 4<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6952336&amp;loc=d3e14435-108349<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name FASB Interpretation (FIN)<br><br> -Number 14<br><br> -Paragraph 3<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 440<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6394976&amp;loc=d3e25287-109308<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.25)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 825<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6449706&amp;loc=d3e16207-108621<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 5<br><br> -Paragraph 9, 10, 11, 12<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_CommitmentsAndContingenciesDisclosureTextBlock</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>nonnum:textBlockItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
    </div>
  </body>
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</TEXT>
</DOCUMENT>
<DOCUMENT>
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<SEQUENCE>53
<FILENAME>R4.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EBABG">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Consolidated Statements Of Operations (USD $)<br>In Thousands, except Per Share data, unless otherwise specified</strong></div>
        </th>
        <th class="th" colspan="4">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th" colspan="2">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th" colspan="2">
          <div>Mar. 31, 2012</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_RevenuesAbstract', window );"><strong>Operating revenues:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OilAndGasSalesRevenue', window );">Oil and natural gas</a></td>
        <td class="nump">$ 16,785<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">$ 14,717<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SalesRevenueNet', window );">Total operating revenues</a></td>
        <td class="nump">667,039<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">745,921<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OperatingCostsAndExpensesAbstract', window );"><strong>Operating costs and expenses:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_ContractDrillingExpenses', window );">Contract drilling</a></td>
        <td class="nump">247,072<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">282,649<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_PressurePumpingOperatingCost', window );">Pressure pumping</a></td>
        <td class="nump">168,156<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">166,857<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OilAndGasProductionExpense', window );">Oil and natural gas</a></td>
        <td class="nump">2,922<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">2,730<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_DepreciationDepletionAmortizationAndImpairment', window );">Depreciation, depletion, amortization and impairment</a></td>
        <td class="nump">136,435<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">122,953<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_SellingGeneralAndAdministrativeExpense', window );">Selling, general and administrative</a></td>
        <td class="nump">17,397<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">13,868<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_GainLossOnSaleOfPropertyPlantEquipment', window );">Net (gain) loss on asset disposals</a></td>
        <td class="nump">125<span></span></td>
        <td class="fn" style="border-bottom: 0px;"><sup>[1]</sup></td>
        <td class="num">(2,400)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"><sup>[1]</sup></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ProvisionForDoubtfulAccounts', window );">Provision for bad debts</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">1,600<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="rou">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CostsAndExpenses', window );">Total operating costs and expenses</a></td>
        <td class="nump">572,107<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">588,257<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="reu">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OperatingIncomeLoss', window );">Operating income</a></td>
        <td class="nump">94,932<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">157,664<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NonoperatingIncomeExpenseAbstract', window );"><strong>Other income (expense):</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_InvestmentIncomeInterest', window );">Interest income</a></td>
        <td class="nump">173<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">54<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_InterestExpense', window );">Interest expense</a></td>
        <td class="num">(6,766)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(4,582)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OtherNonoperatingIncome', window );">Other</a></td>
        <td class="nump">19<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">55<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="rou">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_NonoperatingIncomeExpense', window );">Total other expense</a></td>
        <td class="num">(6,574)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="num">(4,473)<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="reu">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments', window );">Income before income taxes</a></td>
        <td class="nump">88,358<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">153,191<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncomeTaxExpenseBenefitAbstract', window );"><strong>Income tax expense:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_CurrentIncomeTaxExpenseBenefit', window );">Current</a></td>
        <td class="nump">7,573<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">7,510<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_DeferredIncomeTaxExpenseBenefit', window );">Deferred</a></td>
        <td class="nump">24,555<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">48,407<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="reu">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_IncomeTaxExpenseBenefit', window );">Total income tax expense</a></td>
        <td class="nump">32,128<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">55,917<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="rou">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ProfitLoss', window );">Net income</a></td>
        <td class="nump">56,230<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">97,274<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_EarningsPerShareAbstract', window );"><strong>Net income per common share:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_EarningsPerShareBasic', window );">Basic</a></td>
        <td class="nump">$ 0.38<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">$ 0.62<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_EarningsPerShareDiluted', window );">Diluted</a></td>
        <td class="nump">$ 0.38<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">$ 0.62<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract', window );"><strong>Weighted average number of common shares outstanding:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic', window );">Basic</a></td>
        <td class="nump">144,827<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">154,625<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding', window );">Diluted</a></td>
        <td class="nump">146,783<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">155,401<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_CommonStockDividendsPerShareDeclaredAndPaid', window );">Cash dividends per common share</a></td>
        <td class="nump">$ 0.05<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">$ 0.05<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="rh">
        <td class="pl" style="border-bottom: 0px;" valign="top">
          <div class="a">Contract Drilling</div>
        </td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_RevenuesAbstract', window );"><strong>Operating revenues:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_RevenueOilAndGasServices', window );">Oil and gas services</a></td>
        <td class="nump">419,094<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">489,482<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="rh">
        <td class="pl" style="border-bottom: 0px;" valign="top">
          <div class="a">Pressure Pumping</div>
        </td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_RevenuesAbstract', window );"><strong>Operating revenues:</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_RevenueOilAndGasServices', window );">Oil and gas services</a></td>
        <td class="nump">$ 231,160<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
        <td class="nump">$ 241,722<span></span></td>
        <td class="fn" style="border-bottom: 0px;"></td>
      </tr>
      <tr>
        <td colspan="5"></td>
      </tr>
      <tr>
        <td colspan="5">
          <table class="outerFootnotes" width="100%">
            <tr class="outerFootnote">
              <td style="vertical-align: top;" valign="top">[1]</td>
              <td style="vertical-align: top;" valign="top">Net gains or losses associated with the disposal of assets relate to corporate strategy decisions of the executive management group. Accordingly, the related gains or losses have been separately presented and excluded from the results of specific segments.</td>
            </tr>
          </table>
        </td>
      </tr>
    </table>
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        <tr>
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        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Per share dividends declared and paid during the period for each share of common stock outstanding.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
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                    <td>num:perShareItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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              </div>
            </div>
          </td>
        </tr>
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Costs incurred in providing contract drilling services and related maintenance costs, contract preparation and mobilization costs.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_ContractDrillingExpenses</nobr></td>
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                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
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                    <td>xbrli:monetaryItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_DepreciationDepletionAmortizationAndImpairment">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Depreciation, Depletion, Amortization and Impairment</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_DepreciationDepletionAmortizationAndImpairment</nobr></td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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              </div>
            </div>
          </td>
        </tr>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_pten_PressurePumpingOperatingCost">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Pressure Pumping Operating Cost</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>pten_PressurePumpingOperatingCost</nobr></td>
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                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>pten_</td>
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                    <td>xbrli:monetaryItemType</td>
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                    <td>duration</td>
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              </div>
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          </td>
        </tr>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CostsAndExpenses">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Total costs of sales and operating expenses for the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_CostsAndExpenses</nobr></td>
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                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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          </td>
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      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CurrentIncomeTaxExpenseBenefit">
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The component of income tax expense for the period representing amounts of income taxes paid or payable (or refundable) for the period for all income tax obligations as determined by applying the provisions of relevant enacted tax laws to relevant amounts of taxable Income or Loss from continuing operations.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 109<br><br> -Paragraph 289<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Current Tax Expense (or Benefit)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6509736<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 9<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6907707&amp;loc=d3e32639-109319<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SAB TOPIC 6.I.7)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6889476&amp;loc=d3e330036-122817<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 109<br><br> -Paragraph 45<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 08<br><br> -Paragraph h<br><br> -Article 4<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 235<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.4-08.(h))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6881521&amp;loc=d3e23780-122690<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Staff Accounting Bulletin (SAB)<br><br> -Number Topic 6<br><br> -Section I<br><br> -Subsection 7<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_CurrentIncomeTaxExpenseBenefit</nobr></td>
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                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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          </td>
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 109<br><br> -Paragraph 289<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 109<br><br> -Paragraph 45<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SAB TOPIC 6.I.7)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6889476&amp;loc=d3e330036-122817<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 9<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6907707&amp;loc=d3e32639-109319<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Deferred Tax Expense (or Benefit)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6510177<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 08<br><br> -Paragraph h<br><br> -Article 4<br><br><br><br>Reference 9: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 235<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.4-08.(h))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6881521&amp;loc=d3e23780-122690<br><br><br><br>Reference 10: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Staff Accounting Bulletin (SAB)<br><br> -Number Topic 6<br><br> -Section I<br><br> -Subsection 7<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
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          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_EarningsPerShareBasic">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Paragraph 21<br><br> -Article 9<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 36, 37, 38<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6371337&amp;loc=d3e3550-109257<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 942<br><br> -SubTopic 225<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.9-04.23)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6879574&amp;loc=d3e536633-122882<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.21)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 944<br><br> -SubTopic 225<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.7-04.19)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6879464&amp;loc=d3e573970-122913<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Emerging Issues Task Force (EITF)<br><br> -Number 07-4<br><br> -Paragraph 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 55<br><br> -Paragraph 52<br><br> -URI http://asc.fasb.org/extlink&amp;oid=16381557&amp;loc=d3e4984-109258<br><br><br><br>Reference 9: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Paragraph 18<br><br> -Article 7<br><br><br><br>Reference 10: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7655603&amp;loc=d3e1252-109256<br><br><br><br>Reference 11: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 20<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_EarningsPerShareBasic</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:perShareItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_EarningsPerShareDiluted">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Paragraph 18<br><br> -Article 7<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 11, 12, 36<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Emerging Issues Task Force (EITF)<br><br> -Number 07-4<br><br> -Paragraph 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 20<br><br> -Article 5<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.21)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7655603&amp;loc=d3e1252-109256<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Paragraph 21<br><br> -Article 9<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_EarningsPerShareDiluted</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>num:perShareItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_GainLossOnSaleOfPropertyPlantEquipment">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain (loss).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_GainLossOnSaleOfPropertyPlantEquipment</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 235<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.4-08.(h)(1)(i))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6881521&amp;loc=d3e23780-122690<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 08<br><br> -Paragraph h<br><br> -Subparagraph 1(i)<br><br> -Article 4<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncomeTaxExpenseBenefit">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 9<br><br> -Subparagraph (a),(b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6907707&amp;loc=d3e32639-109319<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 109<br><br> -Paragraph 45<br><br> -Subparagraph a, b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 235<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.4-08.(h))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6881521&amp;loc=d3e23780-122690<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 08<br><br> -Paragraph h<br><br> -Article 4<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Income Tax Expense (or Benefit)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6515339<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_IncomeTaxExpenseBenefit</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncomeTaxExpenseBenefitAbstract">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_IncomeTaxExpenseBenefitAbstract</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:stringItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_InterestExpense">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The cost of borrowed funds accounted for as interest that was charged against earnings during the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Paragraph 9<br><br> -Article 9<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher OTS<br><br> -Name Federal Regulation (FR)<br><br> -Number Title 12<br><br> -Section 563c.102<br><br> -Paragraph 9<br><br> -Chapter V<br><br> -Subsection II<br><br> -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy.  It will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 34<br><br> -Paragraph 21<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 835<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6450988&amp;loc=d3e26243-108391<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 942<br><br> -SubTopic 225<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.9-04.9)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6879574&amp;loc=d3e536633-122882<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_InterestExpense</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_InvestmentIncomeInterest">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Income derived from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time value of money or transactions in which the payments are for the use or forbearance of money.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 115<br><br> -Paragraph 14<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 7<br><br> -Article 5<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.7(b))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_InvestmentIncomeInterest</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
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                    <td><strong> Balance Type:</strong></td>
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              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NonoperatingIncomeExpense">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.7)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 7<br><br> -Article 5<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_NonoperatingIncomeExpense</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_NonoperatingIncomeExpenseAbstract</nobr></td>
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                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td>xbrli:stringItemType</td>
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                    <td><strong> Period Type:</strong></td>
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            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OilAndGasProductionExpense">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Costs incurred to operate and maintain an entities' wells and related equipment and facilities, including depreciation and applicable operating costs of support equipment and facilities and other costs of operating and maintaining those wells and related equipment and facilities.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 19<br><br> -Paragraph 24<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.2)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 932<br><br> -SubTopic 360<br><br> -Section 25<br><br> -Paragraph 15<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6474861&amp;loc=d3e65139-109465<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 932<br><br> -SubTopic 235<br><br> -Section 50<br><br> -Paragraph 23<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=8451039&amp;loc=d3e62136-109447<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_OilAndGasProductionExpense</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OilAndGasSalesRevenue">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Revenue from the sale of oil and gas during the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 932<br><br> -SubTopic 235<br><br> -Section 50<br><br> -Paragraph 23<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=8451039&amp;loc=d3e62136-109447<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 932<br><br> -SubTopic 235<br><br> -Section 50<br><br> -Paragraph 24<br><br> -URI http://asc.fasb.org/extlink&amp;oid=8451039&amp;loc=d3e62246-109447<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_OilAndGasSalesRevenue</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
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              </div>
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          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OperatingCostsAndExpensesAbstract">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_OperatingCostsAndExpensesAbstract</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                    <td>xbrli:stringItemType</td>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OperatingIncomeLoss">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The net result for the period of deducting operating expenses from operating revenues.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_OperatingIncomeLoss</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
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                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherNonoperatingIncome">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The aggregate amount of other income amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.7)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 7<br><br> -Article 5<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Audit and Accounting Guide (AAG)<br><br> -Number AAG-BRD<br><br> -Paragraph 80<br><br> -Subparagraph Exhibit 4-4<br><br> -IssueDate 2006-05-01<br><br> -Chapter 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_OtherNonoperatingIncome</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
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                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
                </table>
              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProfitLoss">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph A1, A4, A5<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 19<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7656940&amp;loc=SL4569616-111683<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 29<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 5<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 55<br><br> -Paragraph 4K<br><br> -URI http://asc.fasb.org/extlink&amp;oid=18733213&amp;loc=SL4591552-111686<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1A<br><br> -Subparagraph (a),(c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=18733093&amp;loc=SL4573702-111684<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 38<br><br> -Subparagraph c(1)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 38<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 9: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 810<br><br> -SubTopic 10<br><br> -Section 55<br><br> -Paragraph 4J<br><br> -URI http://asc.fasb.org/extlink&amp;oid=18733213&amp;loc=SL4591551-111686<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ProfitLoss</nobr></td>
                  </tr>
                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
                  </tr>
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              </div>
            </div>
          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProvisionForDoubtfulAccounts">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 5<br><br> -Article 5<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 95<br><br> -Paragraph 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 230<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 28<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6943989&amp;loc=d3e3602-108585<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.5)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br></p>
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                <p>Revenue from oil and gas-related services including well services (such as drilling, rigs and analytic evaluations), transportation, and other supporting contractor services, during the reporting period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
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                <p>Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 1<br><br> -Article 5<br><br><br><br></p>
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                <p>The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 43<br><br> -Paragraph 5A<br><br> -Chapter 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 03<br><br> -Paragraph 4<br><br> -Article 5<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 225<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SX 210.5-03.4)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6880815&amp;loc=d3e20235-122688<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 330<br><br> -SubTopic 10<br><br> -Section 30<br><br> -Paragraph 8<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6386349&amp;loc=d3e3636-108311<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
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                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_SellingGeneralAndAdministrativeExpense</nobr></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 40<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 8<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6371337&amp;loc=d3e3550-109257<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Emerging Issues Task Force (EITF)<br><br> -Number 07-4<br><br> -Paragraph 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 16<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7655603&amp;loc=d3e1505-109256<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 40<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 10<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7655603&amp;loc=d3e1448-109256<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 260<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6371337&amp;loc=d3e3550-109257<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 8<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Emerging Issues Task Force (EITF)<br><br> -Number 07-4<br><br> -Paragraph 4<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 128<br><br> -Paragraph 171<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Weighted-Average Number of Common Shares Outstanding<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6528421<br><br><br><br></p>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
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<font style="FONT-FAMILY: Times New Roman" size="2">Property and
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&#xA0;</p>
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<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>March&#xA0;31,</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>December&#xA0;31,</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Equipment</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,545,029</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,387,490</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Oil and natural gas
properties</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">164,824</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">156,834</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Buildings</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">67,585</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">66,490</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Land</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">11,899</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">10,413</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top"></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,789,337</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,621,227</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Less accumulated
depreciation and depletion</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(2,106,587</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(2,005,844</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Property and equipment,
net</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">3,682,750</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">3,615,383</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
</table>
</div><span></span></td>
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 205<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6360339&amp;loc=d3e1361-107760<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.13-14)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Principles Board Opinion (APB)<br><br> -Number 12<br><br> -Paragraph 5<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 360<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6391035&amp;loc=d3e2868-110229<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 360<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6391110&amp;loc=d3e2921-110230<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                    <td><strong> Name:</strong></td>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Stock-based Compensation<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
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<tr>
<td valign="top" width="4%" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>2.</b></font></td>
<td valign="top" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Stock-based
Compensation</b></font></td>
</tr>
</table>
<!-- xbrl,body -->
<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The Company
uses share-based payments to compensate employees and non-employee
directors. The Company recognizes the cost of share-based payments
under the fair-value-based method. Share-based awards consist of
equity instruments in the form of stock options, restricted stock
or restricted stock units and have included service and, in certain
cases, performance conditions. The Company&#x2019;s share-based
awards have also included both cash-settled and share-settled
performance unit awards. Cash-settled performance unit awards are
accounted for as liability awards. Share-settled performance unit
awards are accounted for as equity awards. The Company issues
shares of common stock when vested stock options are exercised,
when restricted stock is granted and when restricted stock units
and share-settled performance unit awards vest.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2"><i>Stock
Options.</i>&#xA0;The Company estimates the grant date fair values
of stock options using the Black-Scholes-Merton valuation model.
Volatility assumptions are based on the historic volatility of the
Company&#x2019;s common stock over the most recent period equal to
the expected term of the options as of the date the options are
granted. The expected term assumptions are based on the
Company&#x2019;s experience with respect to employee stock option
activity. Dividend yield assumptions are based on the expected
dividends at the time the options are granted. The risk-free
interest rate assumptions are determined by reference to United
States Treasury yields. Weighted-average assumptions used to
estimate the grant date fair values for stock options granted for
the three month periods ended March&#xA0;31, 2013 and 2012
follow:</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<!-- Begin Table Head -->
<tr>
<td width="84%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="6" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Three&#xA0;Months&#xA0;Ended</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>March&#xA0;
31,</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<!-- End Table Head --><!-- Begin Table Body -->
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Volatility</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">46.19</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">%&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">48.72</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">%&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Expected term (in
years)</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5.00</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5.00</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Dividend yield</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1.07</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">%&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1.00</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">%&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Risk-free interest
rate</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.72</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">%&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.83</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">%&#xA0;</font></td>
</tr>
<!-- End Table Body --></table>
<p style="MARGIN-TOP: 18px; MARGIN-BOTTOM: 0px; FONT-SIZE: 1px">
&#xA0;</p>
<p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Stock option
activity from January&#xA0;1, 2013 to March&#xA0;31, 2013
follows:</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<!-- Begin Table Head -->
<tr>
<td width="76%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Underlying</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Shares</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Weighted</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Average</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Exercise</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Price</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<!-- End Table Head --><!-- Begin Table Body -->
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Outstanding at
January&#xA0;1, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">7,827,195</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">20.35</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Granted</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">60,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">18.63</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Exercised</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(1,150,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">16.19</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Cancelled</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Expired</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Outstanding at
March&#xA0;31, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">6,737,195</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">21.04</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Exercisable at
March&#xA0;31, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,738,036</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">21.49</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<!-- End Table Body --></table>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2"><i>Restricted
Stock.</i>&#xA0;For all restricted stock awards to date, shares of
common stock were issued when the awards were made. Non-vested
shares are subject to forfeiture for failure to fulfill service
conditions and, in certain cases, performance conditions.
Non-forfeitable dividends are paid on non-vested shares of
restricted stock. The Company uses the straight-line method to
recognize periodic compensation cost over the vesting
period.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Restricted
stock activity from January&#xA0;1, 2013 to March&#xA0;31, 2013
follows:</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<!-- Begin Table Head -->
<tr>
<td width="76%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Shares</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Weighted</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Average</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Grant&#xA0;Date</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Fair&#xA0;Value</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<!-- End Table Head --><!-- Begin Table Body -->
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Non-vested restricted stock
outstanding at January&#xA0;1, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1,279,146</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">20.03</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Granted</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">18,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">18.63</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Vested</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(56,668</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">22.20</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Forfeited</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(15,570</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">19.68</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Non-vested restricted stock
outstanding at March 31, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1,224,908</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">19.92</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<!-- End Table Body --></table>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2"><i>Restricted
Stock Units.</i>&#xA0;For all restricted stock unit awards made to
date, shares of common stock are not issued until the units vest.
Restricted stock units are subject to forfeiture for failure to
fulfill service conditions. Non-forfeitable cash dividend
equivalents are paid on non-vested restricted stock units. The
Company uses the straight-line method to recognize periodic
compensation cost over the vesting period.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Restricted
stock unit activity from January&#xA0;1, 2013 to March&#xA0;31,
2013 follows:</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<!-- Begin Table Head -->
<tr>
<td width="79%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Shares</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Weighted</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Average</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Grant&#xA0;Date</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Fair&#xA0;Value</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<!-- End Table Head --><!-- Begin Table Body -->
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Non-vested restricted stock
units outstanding at January&#xA0;1, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">17,670</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">20.08</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Granted</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Vested</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Forfeited</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Non-vested restricted stock
units outstanding at March 31, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">17,670</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">20.08</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<!-- End Table Body --></table>
<p style="PADDING-BOTTOM: 0px; MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2"><i>Performance
Unit Awards.</i> In 2010, 2011 and 2012, the Company granted
stock-settled performance unit awards to certain executive officers
(the &#x201C;Stock-Settled Performance Units&#x201D;). The
Stock-Settled Performance Units provide for the recipients to
receive a grant of shares of stock upon the achievement of certain
performance goals established by the Compensation Committee during
the performance period. The performance period for the
Stock-Settled Performance Units is the three year period commencing
on April&#xA0;1 of the year of grant, but can extend for an
additional two years in certain circumstances. The performance
goals for the Stock-Settled Performance Units are tied to the
Company&#x2019;s total shareholder return for the performance period
as compared to total shareholder return for a peer group determined
by the Compensation Committee. These goals are considered to be
market conditions under the relevant accounting standards and the
market conditions were factored into the determination of the fair
value of the performance units. Generally, the recipients will
receive a target number of shares if the Company&#x2019;s total
shareholder return is positive and, when compared to the peer
group, is at the 50</font><font style="FONT-FAMILY: Times New Roman" size="1"><sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline">th</sup></font>
<font style="FONT-FAMILY: Times New Roman" size="2">percentile and
two times the target if at the 75</font><font style="FONT-FAMILY: Times New Roman" size="1"><sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline">th</sup></font>
<font style="FONT-FAMILY: Times New Roman" size="2">percentile or
higher. If the Company&#x2019;s total shareholder return is
positive, and, when compared to the peer group, is at the
25</font><font style="FONT-FAMILY: Times New Roman" size="1"><sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline">th</sup></font>
<font style="FONT-FAMILY: Times New Roman" size="2">percentile, the
recipients will only receive one-half of the target number of
shares. The grant of shares when achievement is between the
25</font><font style="FONT-FAMILY: Times New Roman" size="1"><sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline">th</sup></font>
<font style="FONT-FAMILY: Times New Roman" size="2">and
75</font><font style="FONT-FAMILY: Times New Roman" size="1"><sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline">th</sup></font>
<font style="FONT-FAMILY: Times New Roman" size="2">percentile will
be determined on a pro-rata basis. The target number of shares with
respect to the 2010 Stock-Settled Performance Units was 178,750.
The performance period for the 2010 Stock-Settled Performance Units
ended on March&#xA0;31, 2013 and the Company&#x2019;s total
shareholder return was at the 93</font><font style="FONT-FAMILY: Times New Roman" size="1"><sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline">rd</sup></font>
<font style="FONT-FAMILY: Times New Roman" size="2">percentile. In
April 2013, 357,500 shares were issued to settle the 2010
Stock-Settled Performance Units.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The total
target number of shares with respect to the Stock-Settled
Performance Units is set forth below:</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="84%" align="center">
<!-- Begin Table Head -->
<tr>
<td width="64%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2011</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2010</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<!-- End Table Head --><!-- Begin Table Body -->
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Target number of
shares</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">192,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">144,375</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">178,750</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<!-- End Table Body --></table>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Because the
Stock-Settled Performance Units are stock-settled awards, they are
accounted for as equity awards and measured at fair value on the
date of grant using a Monte Carlo simulation model. The fair value
of the Stock-Settled Performance Units is set forth below (in
thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="84%" align="center">
<!-- Begin Table Head -->
<tr>
<td width="64%"></td>
<td valign="bottom" width="8%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="8%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="8%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2011</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2010</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<!-- End Table Head --><!-- Begin Table Body -->
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Fair value at date of
grant</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">3,065</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,569</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">3,117</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<!-- End Table Body --></table>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">These fair
value amounts are charged to expense on a straight-line basis over
the performance period. Compensation expense associated with the
Stock-Settled Performance Units is shown below (in
thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="84%" align="center">
<!-- Begin Table Head -->
<tr>
<td width="64%"></td>
<td valign="bottom" width="9%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="9%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="9%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2011</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2010</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Performance</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Unit
Awards</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<!-- End Table Head --><!-- Begin Table Body -->
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Three months ended
March&#xA0;31, 2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">255</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">464</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">260</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Three months ended
March&#xA0;31, 2012</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">NA</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">464</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">260</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<!-- End Table Body --></table>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Staff Accounting Bulletin (SAB)<br><br> -Number Topic 14<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 50<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6406099&amp;loc=d3e25284-112666<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5047-113901<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Statement of Position (SOP)<br><br> -Number 93-6<br><br> -Paragraph 53<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 40<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6418621&amp;loc=d3e17540-113929<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph 64, 65, A240<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 4<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5444-113901<br><br><br><br></p>
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<FILENAME>R23.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Basis of Consolidation and Presentation (Tables)<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock', window );">Calculation of Basic and Diluted Net Income Per Share</a></td>
        <td class="text"><div>
<p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The following
table presents information necessary to calculate net income per
share for the three months ended March&#xA0;31, 2013 and 2012 as
well as potentially dilutive securities excluded from the weighted
average number of diluted common shares outstanding because their
inclusion would have been anti-dilutive (in thousands, except per
share amounts):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="78%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="6" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Three Months
Ended</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>March&#xA0;31,</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2"><b>BASIC
EPS:</b></font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Net income</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">56,230</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">97,274</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Adjust for income
attributed to holders of non-vested restricted stock</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(482</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(742</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Income attributed to common
stockholders</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">55,748</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">96,532</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Weighted average number of
common shares outstanding, excluding non-vested shares of
restricted stock</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">144,827</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">154,625</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Basic net income per common
share</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.38</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.62</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2"><b>DILUTED
EPS:</b></font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Income attributed to common
stockholders</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">55,748</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">96,532</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Add incremental earnings
related to potential common shares</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">6</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Adjusted income attributed
to common stockholders</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">55,754</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">96,532</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Weighted average number of
common shares outstanding, excluding non-vested shares of
restricted stock</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">144,827</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">154,625</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Add dilutive effect of
potential common shares</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1,956</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">776</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Weighted average number of
diluted common shares outstanding</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">146,783</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">155,401</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Diluted net income per
common share</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.38</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.62</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Potentially dilutive
securities excluded as anti-dilutive</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1,874</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">3,229</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Tabular disclosure of an entity's basic and diluted earnings per share calculations.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>No definition available.</p>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Stockholders' Equity<br></strong></div>
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        <th class="th" colspan="1">3 Months Ended</th>
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<td valign="top" width="4%" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>10.</b></font></td>
<td valign="top" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Stockholders&#x2019;
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<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2"><i>Cash
Dividends&#x2014;</i>The Company paid cash dividends during the
three months ended March&#xA0;31, 2012 and 2013 as
follows:</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
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<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Per&#xA0;Share</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Total</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
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<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
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<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
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<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Paid on March&#xA0;30,
2012</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.05</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">7,788</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
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&#xA0;</p>
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<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2013:</b></font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Per&#xA0;Share</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Total</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom" colspan="2"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1">(in&#xA0;thousands)</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
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<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Paid on March&#xA0;29,
2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.05</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">7,312</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
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<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">On April 24,
2013, the Company&#x2019;s Board of Directors approved a cash
dividend on its common stock in the amount of $0.05 per share to be
paid on June 28, 2013 to holders of record as of June 14, 2013. The
amount and timing of all future dividend payments, if any, are
subject to the discretion of the Board of Directors and will depend
upon business conditions, results of operations, financial
condition, terms of the Company&#x2019;s credit facilities and other
factors.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">On
July&#xA0;25, 2012, the Company&#x2019;s Board of Directors approved
a stock buyback program authorizing purchases of up to $150 million
of the Company&#x2019;s common stock in open market or privately
negotiated transactions. During the three months ended
March&#xA0;31, 2013, no shares were purchased under the stock
buyback program. As of March&#xA0;31, 2013, the Company has
remaining authorization to purchase approximately $51.1 million of
the Company&#x2019;s outstanding common stock under the stock
buyback program. Shares purchased under the buyback programs are
accounted for as treasury stock.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The Company
purchased 637,624 shares of treasury stock from employees during
the three months ended March&#xA0;31, 2013. These shares were
purchased at fair market value upon the exercise of stock options
to provide the employees with the funds necessary to pay the
exercise price of the stock option and to satisfy payroll tax
withholding obligations. The total purchase price for these shares
was approximately $15.2 million. These purchases were made pursuant
to the terms of the Patterson-UTI Energy, Inc. 2005 Long-Term
Incentive Plan and not pursuant to the stock buyback
program.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Accumulated
other comprehensive income is composed solely of amounts related to
foreign currency translation.</font></p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The entire disclosure for shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable).  Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 04<br><br> -Article 3<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 5<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21488-112644<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 29, 30, 31<br><br> -Article 5<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Staff Accounting Bulletin (SAB)<br><br> -Number Topic 4<br><br> -Section E<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Preferred Stock<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6521494<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 11<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21564-112644<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 4<br><br> -Subparagraph (SAB TOPIC 4.C)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187143-122770<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 4<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21484-112644<br><br><br><br>Reference 9: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 3<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21475-112644<br><br><br><br>Reference 10: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 6<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21506-112644<br><br><br><br>Reference 11: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 30<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6405834&amp;loc=d3e23285-112656<br><br><br><br>Reference 12: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 43<br><br> -Section B<br><br> -Paragraph 7, 11A<br><br> -Chapter 1<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 13: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Staff Accounting Bulletin (SAB)<br><br> -Number Topic 4<br><br> -Section C<br><br><br><br>Reference 14: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6928386&amp;loc=d3e21463-112644<br><br><br><br>Reference 15: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 08<br><br> -Paragraph d<br><br> -Article 4<br><br><br><br>Reference 16: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.29-31)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 17: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 310<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 2<br><br> -Subparagraph (SAB TOPIC 4.E)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6228006&amp;loc=d3e74512-122707<br><br><br><br>Reference 18: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 5<br><br> -Paragraph 15<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 19: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 505<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.3-04)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6959260&amp;loc=d3e187085-122770<br><br><br><br>Reference 20: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 129<br><br> -Paragraph 2, 3, 4, 5, 6, 7, 8<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  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              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Accrued Expenses<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
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<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%">
<tr>
<td valign="top" width="4%" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>6.</b></font></td>
<td valign="top" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Accrued
Expenses</b></font></td>
</tr>
</table>
<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Accrued
expenses consisted of the following at March&#xA0;31, 2013 and
December&#xA0;31, 2012 (in thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="74%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>March&#xA0;31,</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>December&#xA0;31,</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Salaries, wages, payroll
taxes and benefits</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">39,276</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">55,430</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Workers&#x2019; compensation
liability</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">66,755</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">68,441</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Property, sales, use and
other taxes</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">7,211</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">9,749</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Insurance, other than
workers&#x2019; compensation</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">6,104</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">10,419</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Accrued interest
payable</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">14,518</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">7,664</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Deferred
revenue&#x2014;current</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1,523</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Other</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">7,653</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,406</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top"></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">141,517</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">158,632</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
</table>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Deferred
revenue was recorded in the fourth quarter of 2010 in the purchase
price allocation associated with the Company&#x2019;s acquisition of
a pressure pumping business. The deferred revenue related to
out-of-market pricing agreements that were in place at the acquired
business at the time of the acquisition. The deferred revenue was
recognized as pressure pumping revenue over the term of the pricing
agreements, which have now expired. Deferred revenue of
approximately $1.5 million and $1.8 million was recognized in the
three months ended March&#xA0;31, 2013 and 2012, respectively,
related to these pricing agreements.</font></p>
</div><span></span></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 19<br><br> -Subparagraph a<br><br> -Article 5<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 210<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.5-02.19(a),20,24)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 02<br><br> -Paragraph 20, 24<br><br> -Article 5<br><br><br><br></p>
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          <div style="width: 200px;"><strong>Fair Values of Financial Instruments - Additional Information (Detail)<br></strong></div>
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        <th class="th" colspan="1">12 Months Ended</th>
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          <div class="a">Series A, Senior Notes, 4.97 Percent, Due October 5th 2020</div>
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                <p>Minimum Percentage of Fair Value Transactions Corroborated Using Observable Market Inputs Required for Level Two</p>
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                <p>No definition available.</p>
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<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Business Segments<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
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      <tr>
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          <div>Mar. 31, 2013</div>
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<table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="100%">
<tr>
<td valign="top" width="4%" align="left"><font style="FONT-FAMILY: 'Times New Roman'" size="2"><b>4.</b></font></td>
<td valign="top" align="left"><font style="FONT-FAMILY: 'Times New Roman'" size="2"><b>Business
Segments</b></font></td>
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<p style="TEXT-TRANSFORM: none; MARGIN-TOP: 6px; TEXT-INDENT: 4%; LETTER-SPACING: normal; FONT: medium 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">
<font style="FONT-FAMILY: 'Times New Roman'" size="2">The
Company&#x2019;s revenues, operating profits and identifiable assets
are primarily attributable to three business segments:
(i)&#xA0;contract drilling of oil and natural gas wells,
(ii)&#xA0;pressure pumping services and (iii)&#xA0;the investment,
on a non-operating working interest basis, in oil and natural gas
properties. Each of these segments represents a distinct type of
business. These segments have separate management teams which
report to the Company&#x2019;s chief operating decision maker. The
results of operations in these segments are regularly reviewed by
the chief operating decision maker for purposes of determining
resource allocation and assessing performance. Separate financial
data for each of our business segments is provided in the table
below (in thousands):</font></p>
<p style="TEXT-TRANSFORM: none; MARGIN-TOP: 0px; TEXT-INDENT: 0px; LETTER-SPACING: normal; FONT: 12px 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">
&#xA0;</p>
<table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="78%"></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="6" align="center"><font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>Three Months
Ended</b></font><br />
<font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>March&#xA0;31,</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Revenues:</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Contract
drilling</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">420,233</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">490,703</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Pressure
pumping</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">231,160</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">241,722</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Oil and natural
gas</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">16,785</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">14,717</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Total segment
revenues</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">668,178</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">747,142</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Elimination of
intercompany revenues (a)</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(1,139</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(1,221</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">)&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Total revenues</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">667,039</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">745,921</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Income before income
taxes:</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Contract
drilling</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">72,549</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">111,771</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Pressure
pumping</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">28,515</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">46,787</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Oil and natural
gas</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">6,241</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">7,518</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top"></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">107,305</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">166,076</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Corporate and
other</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(12,248</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(10,812</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">)&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Net gain (loss) on asset
disposals (b)</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(125</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">2,400</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Interest
income</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">173</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">54</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Interest
expense</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(6,766</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(4,582</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">)&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Other</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">19</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">55</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Income before income
taxes</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">88,358</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">153,191</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
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<td>&#xA0;</td>
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<p style="TEXT-TRANSFORM: none; MARGIN-TOP: 0px; TEXT-INDENT: 0px; LETTER-SPACING: normal; FONT: 12px 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">
&#xA0;</p>
<table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="74%"></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>March&#xA0;31,</b></font><br />
<font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>December&#xA0;31,</b></font><br />
<font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Identifiable
assets:</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Contract
drilling</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">3,607,349</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">3,538,289</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Pressure
pumping</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">802,050</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">784,128</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Oil and natural
gas</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">55,212</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">54,188</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Corporate and other
(c)</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">192,621</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">180,306</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Total assets</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">4,657,232</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">4,556,911</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
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<p style="BORDER-BOTTOM: rgb(0,0,0) 0.5pt solid; TEXT-TRANSFORM: none; MARGIN-TOP: 0px; TEXT-INDENT: 0px; WIDTH: 140px; LETTER-SPACING: normal; FONT: medium/8px 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 2px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">
&#xA0;</p>
<table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="100%" align="center">
<tr>
<td></td>
<td valign="bottom" width="3%"></td>
<td width="95%"></td>
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<tr>
<td valign="top"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(a)</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="top"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Consists of contract drilling intercompany revenues for
drilling services provided to the oil and natural gas exploration
and production segment.</font></td>
</tr>
<tr>
<td valign="top"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(b)</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="top"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Net gains or losses associated with the disposal of assets
relate to corporate strategy decisions of the executive management
group. Accordingly, the related gains or losses have been
separately presented and excluded from the results of specific
segments.</font></td>
</tr>
<tr>
<td valign="top"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(c)</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="top"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Corporate and other assets primarily include cash on hand and
certain deferred tax assets.</font></td>
</tr>
</table>
</div><span></span></td>
      </tr>
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          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 29<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8864-108599<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 30<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8906-108599<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 32<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8933-108599<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 35<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8984-108599<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8380-108599<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 10<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8538-108599<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 42<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e9054-108599<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 12<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8595-108599<br><br><br><br>Reference 9: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 131<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 10: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 34<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8981-108599<br><br><br><br>Reference 11: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 33<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8971-108599<br><br><br><br>Reference 12: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 26<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8844-108599<br><br><br><br>Reference 13: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 31<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8924-108599<br><br><br><br>Reference 14: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 40<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e9031-108599<br><br><br><br>Reference 15: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 41<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e9038-108599<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
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          <div style="width: 200px;"><strong>Goodwill and Intangible Assets<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
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          <div>Mar. 31, 2013</div>
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<td valign="top" width="4%" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>5.</b></font></td>
<td valign="top" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Goodwill and Intangible
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<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2"><i>Goodwill</i>
&#x2014; Goodwill by operating segment as of March&#xA0;31, 2013 and
changes for the three months then ended are as follows (in
thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
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<!-- Begin Table Head -->
<tr>
<td width="72%"></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
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<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Contract</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Drilling</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Pressure</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Pumping</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Total</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
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<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Balance December&#xA0;31,
2012</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">86,234</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">67,575</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">153,809</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">Changes to
goodwill</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Balance March&#xA0;31,
2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">86,234</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">67,575</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">153,809</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<!-- End Table Body --></table>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">There were no
accumulated impairment losses as of March&#xA0;31, 2013 or
December&#xA0;31, 2012.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Goodwill is
evaluated at least annually on December&#xA0;31, or when
circumstances require, to determine if the fair value of recorded
goodwill has decreased below its carrying value. For purposes of
impairment testing, goodwill is evaluated at the reporting unit
level. The Company&#x2019;s reporting units for impairment testing
have been determined to be its operating segments. The Company
first determines whether it is more likely than not that the fair
value of a reporting unit is less than its carrying value after
considering qualitative, market and other factors. If so, then
goodwill impairment is determined using a two-step impairment test.
The first step is to compare the fair value of an entity&#x2019;s
reporting units to the respective carrying value of those reporting
units. If the carrying value of a reporting unit exceeds its fair
value, the second step of the impairment test is performed whereby
the fair value of the reporting unit is allocated to its
identifiable tangible and intangible assets and liabilities with
any remaining fair value representing the fair value of goodwill.
If this resulting fair value of goodwill is less than the carrying
value of goodwill, an impairment loss would be recognized in the
amount of the shortfall.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2"><i>Intangible
Assets</i> &#x2014; Intangible assets were recorded in the pressure
pumping operating segment in connection with the fourth quarter
2010 acquisition of the assets of a pressure pumping business. As a
result of the purchase price allocation, the Company recorded
intangible assets related to a non-compete agreement and the
customer relationships acquired. These intangible assets were
recorded at fair value on the date of acquisition.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The non-compete
agreement has a term of three years from October&#xA0;1, 2010. The
value of this agreement was estimated using a with and without
scenario where cash flows were projected through the term of the
agreement assuming the agreement is in place and compared to cash
flows assuming the non-compete agreement was not in place. The
intangible asset associated with the non-compete agreement is being
amortized on a straight-line basis over the three-year term of the
agreement. Amortization expense of approximately $117,000 was
recorded in the three months ended March&#xA0;31, 2013 and
2012.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The value of
the customer relationships was estimated using a multi-period
excess earnings model to determine the present value of the
projected cash flows associated with the customers in place at the
time of the acquisition and taking into account a contributory
asset charge. The resulting intangible asset is being amortized on
a straight-line basis over seven years. Amortization expense of
approximately $911,000 was recorded in the three months ended
March&#xA0;31, 2013 and 2012 associated with customer
relationships.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The following
table presents the gross carrying amount and accumulated
amortization of intangible assets as of March&#xA0;31, 2013 and
December&#xA0;31, 2012 (in thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%" align="center">
<!-- Begin Table Head -->
<tr>
<td width="53%"></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="10" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>March&#xA0;31,
2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="10" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>December&#xA0;31,
2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Gross<br />
Carrying</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Amount</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Accumulated</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Amortization</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Net<br />
Carrying</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Amount</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Gross<br />
Carrying</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Amount</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Accumulated</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Amortization</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Net<br />
Carrying</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Amount</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<!-- End Table Head --><!-- Begin Table Body -->
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Non-compete
agreement</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1,400</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(1,167</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">233</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1,400</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(1,050</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">350</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Customer
relationships</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">25,500</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(9,107</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">16,393</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">25,500</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(8,196</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">17,304</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Total intangible
assets</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">26,900</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(10,274</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">16,626</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">26,900</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(9,246</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">17,654</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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&#xA0;</p>
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final.  May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 30<br><br> -Section 50<br><br> -Paragraph 3<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7658586&amp;loc=d3e16373-109275<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 30<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7658586&amp;loc=d3e16265-109275<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 30<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7658586&amp;loc=d3e16323-109275<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 142<br><br> -Paragraph 42, 43, 44, 45, 46, 47<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=14024403&amp;loc=d3e13854-109267<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=14024403&amp;loc=d3e13816-109267<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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<DOCUMENT>
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<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Asset Retirement Obligation<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
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<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%">
<tr>
<td valign="top" width="4%" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>7.</b></font></td>
<td valign="top" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Asset Retirement
Obligation</b></font></td>
</tr>
</table>
<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The Company
records a liability for the estimated costs to be incurred in
connection with the abandonment of oil and natural gas properties
in the future. This liability is included in the caption
&#x201C;other&#x201D; in the liabilities section of the consolidated
balance sheet. The following table describes the changes to the
Company&#x2019;s asset retirement obligations during the three
months ended March&#xA0;31, 2013 and 2012 (in
thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="82%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="6" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Three&#xA0;Months&#xA0;Ended</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>March&#xA0;
31,</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Balance at beginning of
year</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">4,422</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">3,455</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Liabilities
incurred</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">71</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">106</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Liabilities
settled</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(13</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(68</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Accretion
expense</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">41</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">37</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Revision in estimated costs
of plugging oil and natural gas wells</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">550</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Asset retirement obligation
at end of period</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">4,521</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">4,080</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 410<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6392692&amp;loc=d3e7535-110849<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 410<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6392692&amp;loc=d3e7569-110849<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 143<br><br> -Paragraph 22<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EILAC">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Weighted-Average Assumptions Used to Estimate Grant Date Fair Values for Stock Options Granted (Detail) (Stock Options)<br></strong></div>
        </th>
        <th class="th" colspan="2">3 Months Ended</th>
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          <div>Mar. 31, 2013</div>
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          <div>Mar. 31, 2012</div>
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        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedLineItems', window );"><strong>Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="nump">46.19%<span></span></td>
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        <td class="nump">0.72%<span></span></td>
        <td class="nump">0.83%<span></span></td>
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    </table>
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                    <td><strong> Balance Type:</strong></td>
                    <td>na</td>
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                    <td><strong> Period Type:</strong></td>
                    <td>duration</td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (f)(2)(iii)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph e(2)(c)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SAB TOPIC 14.D.2)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6793087&amp;loc=d3e301413-122809<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (f)(2)(i)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Staff Accounting Bulletin (SAB)<br><br> -Number Topic 14<br><br> -Section D<br><br> -Subsection 2<br><br><br><br></p>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The risk-free interest rate assumption that is used in valuing an option on its own shares.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (f)(2)(iv)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph e(2)(d)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
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        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The range of expected volatilities used and the weighted-average expected volatility for an entity using a valuation technique with different volatilities during the contractual term.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (f)(2)(ii)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph e(2)(b)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate</nobr></td>
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  <head>
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    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EHH">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Accrued Expenses - Additional Information (Detail) (USD $)<br>In Millions, unless otherwise specified</strong></div>
        </th>
        <th class="th" colspan="2">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
        <th class="th">
          <div>Mar. 31, 2012</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_ScheduleOfAccruedLiabilitiesLineItems', window );"><strong>Schedule of Accrued Liabilities [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="nump">$ 1.5<span></span></td>
        <td class="nump">$ 1.8<span></span></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Details</a><div>
                <table border="0" cellpadding="0" cellspacing="0">
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 605<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SAB TOPIC 13.A.4(a).Q1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6600647&amp;loc=d3e214044-122780<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Staff Accounting Bulletin (SAB)<br><br> -Number Topic 13<br><br> -Section A<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Fair Values of Financial Instruments<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
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      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
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<tr>
<td valign="top" width="4%" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>12.</b></font></td>
<td valign="top" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Fair Values of Financial
Instruments</b></font></td>
</tr>
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<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The carrying
values of cash and cash equivalents, trade receivables and accounts
payable approximate fair value due to the short-term maturity of
these items. These fair value estimates are considered Level 1 fair
value estimates in the fair value hierarchy of fair value
accounting.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The estimated
fair value of the Company&#x2019;s outstanding debt balances
(including current portion) as of March&#xA0;31, 2013 and
December&#xA0;31, 2012 is set forth below (in
thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
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<td width="64%"></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom" colspan="6" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>March&#xA0;31,
2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom" colspan="6" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>December&#xA0;31,
2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Carrying</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Value</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Fair</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Value</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Carrying</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Value</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Fair</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Value</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Borrowings under Credit
Agreement:</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">Term loan
facility</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">97,500</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">97,500</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">98,750</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">98,750</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">4.97% Series A Senior
Notes</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">300,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">321,743</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">300,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">329,281</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">4.27% Series B Senior
Notes</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">300,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">303,342</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">300,000</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">310,591</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Total debt</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">697,500</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">722,585</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">698,750</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">738,622</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
</table>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The carrying
values of the balances outstanding under the term loan approximate
their fair values as this instrument has a floating interest rate.
The fair value of the 4.97% Series A Senior Notes and the 4.27%
Series B Senior Notes at March&#xA0;31, 2013 and December&#xA0;31,
2012 are based on discounted cash flows associated with the
respective notes using current market rates of interest at those
respective dates.&#xA0;For the 4.97% Series A Senior Notes, the
current market rates used in measuring this fair value were 3.49%
at March&#xA0;31, 2013 and 3.36% at December&#xA0;31,
2012.&#xA0;For the 4.27% Series B Senior Notes, the current market
rate used in measuring this fair value was 3.85% at March&#xA0;31,
2013 and 3.70% at December&#xA0;31, 2012. These fair value
estimates are based on observable market inputs and are considered
Level 2 fair value estimates in the fair value hierarchy of fair
value accounting.</font></p>
</div><span></span></td>
      </tr>
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    <div style="display: none;">
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          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
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        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 825<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 16<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7491637&amp;loc=d3e13504-108611<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 107<br><br> -Paragraph 15C, 15D<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 133<br><br> -Paragraph 44A, 44B<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 107<br><br> -Paragraph 15A<br><br> -Subparagraph a-d<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 107<br><br> -Paragraph 3, 10, 14, 15<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 825<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 10<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7491637&amp;loc=d3e13433-108611<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 159<br><br> -Paragraph 17-22, 27, 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 825<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 21<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7491637&amp;loc=d3e13537-108611<br><br><br><br>Reference 9: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 107<br><br> -Paragraph 15B<br><br> -Subparagraph a, b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 10: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 157<br><br> -Paragraph 32, 33, 34<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 11: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 820<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7578670&amp;loc=d3e19207-110258<br><br><br><br>Reference 12: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 825<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 28<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6957238&amp;loc=d3e14064-108612<br><br><br><br>Reference 13: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 825<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 30<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6957238&amp;loc=d3e14172-108612<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=us-ascii">
    <link rel="StyleSheet" type="text/css" href="report.css"><script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script></head>
  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Business Segments (Tables)<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock', window );">Business Segments - Financial Information</a></td>
        <td class="text"><div>
<p style="TEXT-TRANSFORM: none; MARGIN-TOP: 6px; TEXT-INDENT: 4%; LETTER-SPACING: normal; FONT: medium 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">
<font style="FONT-FAMILY: 'Times New Roman'" size="2">Separate
financial data for each of our business segments is provided in the
table below (in thousands):</font></p>
<p style="TEXT-TRANSFORM: none; MARGIN-TOP: 0px; TEXT-INDENT: 0px; LETTER-SPACING: normal; FONT: 12px 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">
&#xA0;</p>
<table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="78%"></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="6" align="center"><font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>Three Months
Ended</b></font><br />
<font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>March&#xA0;31,</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Revenues:</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Contract
drilling</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">420,233</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">490,703</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Pressure
pumping</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">231,160</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">241,722</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Oil and natural
gas</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">16,785</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">14,717</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Total segment
revenues</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">668,178</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">747,142</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Elimination of
intercompany revenues (a)</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(1,139</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(1,221</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">)&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Total revenues</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">667,039</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">745,921</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Income before income
taxes:</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Contract
drilling</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">72,549</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">111,771</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Pressure
pumping</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">28,515</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">46,787</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Oil and natural
gas</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">6,241</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">7,518</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top"></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">107,305</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">166,076</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Corporate and
other</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(12,248</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(10,812</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">)&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Net gain (loss) on asset
disposals (b)</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(125</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">2,400</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Interest
income</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">173</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">54</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Interest
expense</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(6,766</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(4,582</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">)&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Other</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">19</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">55</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Income before income
taxes</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">88,358</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">153,191</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
</table>
<p style="TEXT-TRANSFORM: none; MARGIN-TOP: 0px; TEXT-INDENT: 0px; LETTER-SPACING: normal; FONT: 12px 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">
&#xA0;</p>
<table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="74%"></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>March&#xA0;31,</b></font><br />
<font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>December&#xA0;31,</b></font><br />
<font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Identifiable
assets:</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Contract
drilling</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">3,607,349</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">3,538,289</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
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<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Pressure
pumping</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">802,050</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">784,128</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Oil and natural
gas</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">55,212</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">54,188</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Corporate and other
(c)</font></p>
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<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">192,621</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">180,306</font></td>
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<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
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<td>&#xA0;</td>
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<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Total assets</font></p>
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<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
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<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">4,657,232</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">4,556,911</font></td>
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<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
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<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
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<td valign="top"><font style="FONT-FAMILY: 'Times New Roman'" size="2">(a)</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="top"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Consists of contract drilling intercompany revenues for
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<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="top"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Net gains or losses associated with the disposal of assets
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 22<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8736-108599<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 25<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8813-108599<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 20<br><br> -Section 50<br><br> -Paragraph 1<br><br> -URI http://asc.fasb.org/extlink&amp;oid=14024403&amp;loc=d3e13816-109267<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 131<br><br> -Paragraph 27, 28<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 30<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8906-108599<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 280<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 21<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6534315&amp;loc=d3e8721-108599<br><br><br><br></p>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0ETNAE">
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          <div style="width: 200px;"><strong>Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) (USD $)<br>In Thousands, unless otherwise specified</strong></div>
        </th>
        <th class="th">
          <div>Mar. 31, 2013</div>
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          <div>Dec. 31, 2012</div>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems', window );"><strong>Acquired Finite-Lived Intangible Assets [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="num">(10,274)<span></span></td>
        <td class="num">(9,246)<span></span></td>
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        <td class="nump">16,626<span></span></td>
        <td class="nump">17,654<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems', window );"><strong>Acquired Finite-Lived Intangible Assets [Line Items]</strong></a></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="num">(1,167)<span></span></td>
        <td class="num">(1,050)<span></span></td>
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        <td class="nump">233<span></span></td>
        <td class="nump">350<span></span></td>
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          <div class="a">Customer Relationships</div>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems', window );"><strong>Acquired Finite-Lived Intangible Assets [Line Items]</strong></a></td>
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        <td class="nump">25,500<span></span></td>
        <td class="nump">25,500<span></span></td>
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        <td class="num">(9,107)<span></span></td>
        <td class="num">(8,196)<span></span></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 30<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (a)(1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7658586&amp;loc=d3e16323-109275<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 142<br><br> -Paragraph 45<br><br> -Subparagraph a(1)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 30<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (a)(1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7658586&amp;loc=d3e16323-109275<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 142<br><br> -Paragraph 45<br><br> -Subparagraph a(1)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
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                <p>Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 350<br><br> -SubTopic 30<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (a)(1)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=7658586&amp;loc=d3e16323-109275<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 142<br><br> -Paragraph 45<br><br> -Subparagraph a(1)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
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      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Compensation Expense Associated with Stock-Settled Performance Units (Detail) (USD $)<br>In Thousands, unless otherwise specified</strong></div>
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      <tr>
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          <div>Mar. 31, 2012</div>
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        <td class="text">&#xA0;<span></span></td>
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        <td class="nump">464<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_UnrecognizedShareBasedCompensationExpenseLineItems', window );"><strong>Unrecognized Share Based Compensation Expense [Line Items]</strong></a></td>
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                <p>Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (h)(1)(i)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph g(1)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (b)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5047-113901<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Staff Accounting Bulletin (SAB)<br><br> -Number Topic 14<br><br> -Section F<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph 64<br><br> -Subparagraph b<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SAB TOPIC 14.F)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6793087&amp;loc=d3e301413-122809<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EIDAC">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Consolidated Statements Of Comprehensive Income (USD $)<br>In Thousands, unless otherwise specified</strong></div>
        </th>
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          <div>Mar. 31, 2013</div>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ProfitLoss', window );">Net income</a></td>
        <td class="nump">$ 56,230<span></span></td>
        <td class="nump">$ 97,274<span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract', window );"><strong>Other comprehensive income (loss), net of taxes of $0 and $0, respectively:</strong></a></td>
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        <td class="text">&#xA0;<span></span></td>
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        <td class="num">(2,303)<span></span></td>
        <td class="nump">2,554<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ComprehensiveIncomeNetOfTax', window );">Total comprehensive income</a></td>
        <td class="nump">$ 53,927<span></span></td>
        <td class="nump">$ 99,828<span></span></td>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Net Income<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6518256<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 38<br><br> -Subparagraph c(3)<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Other Comprehensive Income<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6519514<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph 30<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Glossary Comprehensive Income<br><br> -URI http://asc.fasb.org/extlink&amp;oid=16317811<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 220<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 5<br><br> -URI http://asc.fasb.org/extlink&amp;oid=20435746&amp;loc=d3e557-108580<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher AICPA<br><br> -Name Accounting Research Bulletin (ARB)<br><br> -Number 51<br><br> -Paragraph A5<br><br> -Appendix A<br><br><br><br></p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>Net of tax and reclassification adjustments of the change in the balance sheet adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity. Also includes the following: gain (loss) on foreign currency forward exchange contracts; foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; and gain (loss) on a derivative instrument or nonderivative financial instrument that may give rise to a foreign currency transaction gain (loss) that has been designated and qualified as a hedging instrument for hedging of the foreign currency exposure of a net investment in a foreign operation.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 220<br><br> -SubTopic 10<br><br> -Section 45<br><br> -Paragraph 10A<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=20435746&amp;loc=SL7669646-108580<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 830<br><br> -SubTopic 30<br><br> -Section 45<br><br> -Paragraph 20<br><br> -Subparagraph (b,c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6915805&amp;loc=d3e32211-110900<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                <p>The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Basis of Consolidation and Presentation<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock', window );">Basis of Consolidation and Presentation</a></td>
        <td class="text"><div>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%">
<tr>
<td valign="top" width="4%" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>1.</b></font></td>
<td valign="top" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Basis of Consolidation
and Presentation</b></font></td>
</tr>
</table>
<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The unaudited
interim consolidated financial statements include the accounts of
Patterson-UTI Energy, Inc. (the &#x201C;Company&#x201D;) and its
wholly-owned subsidiaries. All significant intercompany accounts
and transactions have been eliminated. Except for wholly-owned
subsidiaries, the Company has no controlling financial interests in
any entity which would require consolidation.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The unaudited
interim consolidated financial statements have been prepared by
management of the Company pursuant to the rules and regulations of
the Securities and Exchange Commission. Certain information and
footnote disclosures normally included in financial statements
prepared in accordance with accounting principles generally
accepted in the United States of America have been omitted pursuant
to such rules and regulations, although the Company believes the
disclosures included either on the face of the financial statements
or herein are sufficient to make the information presented not
misleading. In the opinion of management, all adjustments which are
of a normal recurring nature considered necessary for a fair
statement of the information in conformity with accounting
principles generally accepted in the United States of America have
been included. The Unaudited Consolidated Balance Sheet as of
December&#xA0;31, 2012, as presented herein, was derived from the
audited consolidated balance sheet of the Company, but does not
include all disclosures required by accounting principles generally
accepted in the United States of America. These unaudited
consolidated financial statements should be read in conjunction
with the consolidated financial statements and related notes
included in the Company&#x2019;s Annual Report on Form&#xA0;10-K for
the fiscal year ended December&#xA0;31, 2012. The results of
operations for the three months ended March&#xA0;31, 2013 are not
necessarily indicative of the results to be expected for the full
year.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The
U.S.&#xA0;dollar is the functional currency for all of the
Company&#x2019;s operations except for its Canadian operations,
which uses the Canadian dollar as its functional currency. The
effects of exchange rate changes are reflected in accumulated other
comprehensive income, which is a separate component of
stockholders&#x2019; equity.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The carrying
values of cash and cash equivalents, trade receivables and accounts
payable approximate fair value.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The Company
provides a dual presentation of its net income per common share in
its unaudited consolidated statements of operations: Basic net
income per common share (&#x201C;Basic EPS&#x201D;) and diluted net
income per common share (&#x201C;Diluted EPS&#x201D;).</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Basic EPS
excludes dilution and is computed by first allocating earnings
between common stockholders and holders of non-vested shares of
restricted stock. Basic EPS is then determined by dividing the
earnings attributable to common stockholders by the weighted
average number of common shares outstanding during the period,
excluding non-vested shares of restricted stock.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">Diluted EPS is
based on the weighted average number of common shares outstanding
plus the dilutive effect of potential common shares, including
stock options, non-vested shares of restricted stock and restricted
stock units. The dilutive effect of stock options and restricted
stock units is determined using the treasury stock method. The
dilutive effect of non-vested shares of restricted stock is based
on the more dilutive of the treasury stock method or the two-class
method, assuming a reallocation of undistributed earnings to common
stockholders after considering the dilutive effect of potential
common shares other than non-vested shares of restricted
stock.</font></p>
<p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px; FONT-SIZE: 1px">
&#xA0;</p>
<p style="MARGIN-TOP: 0px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The following
table presents information necessary to calculate net income per
share for the three months ended March&#xA0;31, 2013 and 2012 as
well as potentially dilutive securities excluded from the weighted
average number of diluted common shares outstanding because their
inclusion would have been anti-dilutive (in thousands, except per
share amounts):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center">
<tr>
<td width="78%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="6" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Three Months
Ended</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>March&#xA0;31,</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2"><b>BASIC
EPS:</b></font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Net income</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">56,230</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">97,274</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Adjust for income
attributed to holders of non-vested restricted stock</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(482</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(742</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Income attributed to common
stockholders</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">55,748</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">96,532</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Weighted average number of
common shares outstanding, excluding non-vested shares of
restricted stock</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">144,827</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">154,625</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Basic net income per common
share</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.38</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.62</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2"><b>DILUTED
EPS:</b></font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Income attributed to common
stockholders</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">55,748</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">96,532</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Add incremental earnings
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<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
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<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
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<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
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<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
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<td>&#xA0;</td>
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<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Adjusted income attributed
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<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">96,532</font></td>
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<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
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<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Weighted average number of
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restricted stock</font></p>
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<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">144,827</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">154,625</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
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<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Add dilutive effect of
potential common shares</font></p>
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<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1,956</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">776</font></td>
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<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
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<td valign="bottom">
<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
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<td>&#xA0;</td>
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<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">146,783</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">155,401</font></td>
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<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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<td>&#xA0;</td>
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<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Diluted net income per
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<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.38</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">0.62</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
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<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Potentially dilutive
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<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
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<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">3,229</font></td>
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<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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<td>&#xA0;</td>
<td valign="bottom">&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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<td valign="bottom">
<p style="BORDER-TOP: #000000 3px double">&#xA0;</p>
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<td>&#xA0;</td>
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                <p>The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.</p>
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                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
                  </tr>
                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>credit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
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                </table>
              </div>
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          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiability">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The amount of the deferred tax liability which was not recognized because of the exceptions to comprehensive recognition of deferred taxes.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 944<br><br> -SubTopic 740<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6487024&amp;loc=d3e29054-158556<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 995<br><br> -SubTopic 740<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6503627&amp;loc=d3e59836-110443<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 109<br><br> -Paragraph 44<br><br> -Subparagraph c, d<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 942<br><br> -SubTopic 740<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6479915&amp;loc=d3e66715-112838<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 30<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (c)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6424122&amp;loc=d3e41874-109331<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
                <table border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td><strong> Name:</strong></td>
                    <td><nobr>us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiability</nobr></td>
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                  <tr>
                    <td style="padding-right: 4px;"><nobr><strong> Namespace Prefix:</strong></nobr></td>
                    <td>us-gaap_</td>
                  </tr>
                  <tr>
                    <td><strong> Data Type:</strong></td>
                    <td>xbrli:monetaryItemType</td>
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                  <tr>
                    <td><strong> Balance Type:</strong></td>
                    <td>debit</td>
                  </tr>
                  <tr>
                    <td><strong> Period Type:</strong></td>
                    <td>instant</td>
                  </tr>
                </table>
              </div>
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          </td>
        </tr>
      </table>
      <table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings">
        <tr>
          <td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td>
        </tr>
        <tr>
          <td>
            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to the repatriation of foreign earnings in the period.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 12<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6907707&amp;loc=d3e32687-109319<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 13<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6907707&amp;loc=d3e32698-109319<br><br><br><br></p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ Details</a><div style="display: none;">
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                    <td><strong> Name:</strong></td>
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                    <td><strong> Period Type:</strong></td>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EPE">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Goodwill and Intangible Assets (Tables)<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
      </tr>
      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
        </th>
      </tr>
      <tr class="re">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ScheduleOfGoodwillTextBlock', window );">Goodwill by Operating Segment</a></td>
        <td class="text"><div>
<p style="TEXT-TRANSFORM: none; MARGIN-TOP: 6px; TEXT-INDENT: 4%; LETTER-SPACING: normal; FONT: medium 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">
<font style="FONT-FAMILY: 'Times New Roman'" size="2"><i>Goodwill&#xA0;</i>&#x2014; Goodwill by
operating segment as of March&#xA0;31, 2013 and changes for the
three months then ended are as follows (in thousands):</font></p>
<p style="TEXT-TRANSFORM: none; MARGIN-TOP: 0px; TEXT-INDENT: 0px; LETTER-SPACING: normal; FONT: 12px 'Times New Roman'; WHITE-SPACE: normal; MARGIN-BOTTOM: 0px; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">
&#xA0;</p>
<table style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: collapse; FONT-FAMILY: 'Times New Roman'; WORD-SPACING: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px" border="0" cellspacing="0" cellpadding="0" width="84%" align="center">
<tr>
<td width="72%"></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>Contract</b></font><br />
<font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>Drilling</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>Pressure</b></font><br />
<font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>Pumping</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: 'Times New Roman'" size="1"><b>Total</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Balance December&#xA0;31,
2012</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">86,234</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">67,575</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">153,809</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr>
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Changes to
goodwill</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#x2014;&#xA0;&#xA0;</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 1px solid">&#xA0;</p>
</td>
<td>&#xA0;</td>
</tr>
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: 'Times New Roman'" size="2">Balance March&#xA0;31,
2013</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">86,234</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">67,575</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: 'Times New Roman'" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: 'Times New Roman'" size="2">153,809</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: 'Times New Roman'" size="2">&#xA0;&#xA0;</font></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
<td valign="bottom">&#xA0;&#xA0;</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td valign="bottom">
<p style="BORDER-TOP: rgb(0,0,0) 3px double">&#xA0;</p>
</td>
<td>&#xA0;</td>
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<br class="Apple-interchange-newline" /></div><span></span></td>
      </tr>
      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock', window );">Gross Carrying Amount and Accumulated Amortization of Intangible Assets</a></td>
        <td class="text"><div>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">The following
table presents the gross carrying amount and accumulated
amortization of intangible assets as of March&#xA0;31, 2013 and
December&#xA0;31, 2012 (in thousands):</font></p>
<p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">
&#xA0;</p>
<table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="100%" align="center">
<!-- Begin Table Head -->
<tr>
<td width="53%"></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="10" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>March&#xA0;31,
2013</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="10" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>December&#xA0;31,
2012</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<tr>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Gross<br />
Carrying</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Amount</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Accumulated</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Amortization</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Net<br />
Carrying</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Amount</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Gross<br />
Carrying</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Amount</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Accumulated</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Amortization</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Net<br />
Carrying</b></font><br />
<font style="FONT-FAMILY: Times New Roman" size="1"><b>Amount</b></font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
</tr>
<!-- End Table Head --><!-- Begin Table Body -->
<tr bgcolor="#CCEEFF">
<td valign="top">
<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Non-compete
agreement</font></p>
</td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">1,400</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(1,167</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">233</font></td>
<td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
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<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">350</font></td>
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<p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Customer
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<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
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<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
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<td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(9,107</font></td>
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<td valign="bottom"><font size="1">&#xA0;&#xA0;</font></td>
<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">&#xA0;</font></td>
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<p style="BORDER-TOP: #000000 1px solid">&#xA0;</p>
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<td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td>
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        <td class="text">Generally, the recipients will receive a target number  of shares if the Company's total shareholder return is positive and, when  compared to the peer group, is at the 50thpercentile and two times the target if  at the 75thpercentile or higher.<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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      <tr class="ro">
        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_PerformanceAwardBaseNumberOfShares', window );">Base number of shares</a></td>
        <td class="nump">178,750<span></span></td>
        <td class="text">&#xA0;<span></span></td>
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        <td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_pten_SharesOfCommonStockIssued', window );">Shares issued</a></td>
        <td class="text">&#xA0;<span></span></td>
        <td class="nump">357,500<span></span></td>
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                <p>Performance Award, Base Number of Shares</p>
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                <p>Share Based Compensation Arrangement by Share Based Payment Award, Performance Period</p>
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                <p>No definition available.</p>
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                <p>Shares Of Common Stock Issued</p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>General descriptive information regarding an arrangement under which employees and directors receive: (a) awards of equity shares, equity share options, or other equity instruments; or (b) the entity incurs liabilities to them: (1) in amounts based, at least in part, on the price of the entity's shares or other equity instruments; or (2) that require or may require settlement by issuance of the entity's shares. Such an arrangement is usually provided to employees and directors to compensate them, provide performance incentives to them, and to attract or retain their services. May also include pertinent information particular to a plan that is not elsewhere specified in the taxonomy.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5070-113901<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 718<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 1<br><br> -Subparagraph (a)<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6415400&amp;loc=d3e5047-113901<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph 64, 65<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 123R<br><br> -Paragraph A240<br><br> -Subparagraph a<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br></p>
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  <body><span style="display: none;">v2.4.0.6</span><table class="report" border="0" cellspacing="2" id="ID0EAD">
      <tr>
        <th class="tl" colspan="1" rowspan="2">
          <div style="width: 200px;"><strong>Income Taxes<br></strong></div>
        </th>
        <th class="th" colspan="1">3 Months Ended</th>
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      <tr>
        <th class="th">
          <div>Mar. 31, 2013</div>
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<tr>
<td valign="top" width="4%" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>11.</b></font></td>
<td valign="top" align="left"><font style="FONT-FAMILY: Times New Roman" size="2"><b>Income
Taxes</b></font></td>
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<p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">On
January&#xA0;1, 2010, the Company converted its Canadian operations
from a Canadian branch to a controlled foreign corporation for
Federal income tax purposes. Because the statutory tax rates in
Canada are lower than those in the United States, this transaction
triggered a $5.1 million reduction in the Company&#x2019;s deferred
tax liabilities, which is being amortized as a reduction to
deferred income tax expense over the weighted average remaining
useful life of the Canadian assets.</font></p>
<p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px">
<font style="FONT-FAMILY: Times New Roman" size="2">As a result of
the above conversion, the Company&#x2019;s Canadian assets are no
longer directly subject to United States taxation, provided that
the related unremitted earnings are permanently reinvested in
Canada. Effective January&#xA0;1, 2010, the Company has elected to
permanently reinvest these unremitted earnings in Canada, and
intends to do so for the foreseeable future. As a result, no
deferred United States federal or state income taxes have been
provided on such unremitted foreign earnings, which totaled
approximately $33.7 million as of March&#xA0;31, 2013. The
unrecognized deferred tax liability associated with these earnings
was approximately $5.1 million, net of available foreign tax
credits. This liability would be recognized if the Company received
a dividend of these unremitted earnings.</font></p>
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            <div class="body" style="padding: 2px;"><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div>
                <p>The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.</p>
              </div><a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;">
                <p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 109<br><br> -Paragraph 136, 172<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 2: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 235<br><br> -SubTopic 10<br><br> -Section S99<br><br> -Paragraph 1<br><br> -Subparagraph (SX 210.4-08.(h))<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6881521&amp;loc=d3e23780-122690<br><br><br><br>Reference 3: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher SEC<br><br> -Name Regulation S-X (SX)<br><br> -Number 210<br><br> -Section 08<br><br> -Paragraph h<br><br> -Article 4<br><br><br><br>Reference 4: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 15<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6907707&amp;loc=d3e32718-109319<br><br><br><br>Reference 5: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Statement of Financial Accounting Standard (FAS)<br><br> -Number 109<br><br> -Paragraph 43, 44, 45, 46, 47, 48, 49<br><br> -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.<br><br><br><br>Reference 6: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 2<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6907707&amp;loc=d3e32537-109319<br><br><br><br>Reference 7: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 9<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6907707&amp;loc=d3e32639-109319<br><br><br><br>Reference 8: http://www.xbrl.org/2003/role/presentationRef<br><br> -Publisher FASB<br><br> -Name Accounting Standards Codification<br><br> -Topic 740<br><br> -SubTopic 10<br><br> -Section 50<br><br> -Paragraph 3<br><br> -URI http://asc.fasb.org/extlink&amp;oid=6907707&amp;loc=d3e32559-109319<br><br><br><br></p>
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