XML 31 R14.htm IDEA: XBRL DOCUMENT v2.4.0.6

Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Earnings Per Share

	Three months ended March 31
	2013			2012
Net income	$	76,584		$	62,664
Shares:
Weighted average number of common shares outstanding		31,012			31,410
Dilutive stock awards		217			436
Diluted weighted average number of common
shares outstanding		31,229			31,846
Basic earnings per share	$	2.47		$	2.00
Diluted earnings per share	$	2.45		$	1.97

X

- Details

Name:	us-gaap_EarningsPerShareReconciliationAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

Name:	us-gaap_ScheduleOfCalculationOfNumeratorAndDenominatorInEarningsPerShareTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration