Quarterly Financial Data

12 Months Ended

Dec. 31, 2012

10. Quarterly Financial Data (Unaudited)

Summarized unaudited quarterly financial data:



	2012
	March 31		June 30		September 30		December 31
Revenue	$	640,603	$	690,932	$	700,528	$	699,161
Operating income	$	102,224	$	133,790	$	117,663	$	102,188
Net income	$	62,664	$	81,683	$	72,300	$	61,353
Basic earnings per share	$	2.00	$	2.58	$	2.28	$	1.96
Diluted earnings per share	$	1.97	$	2.56	$	2.27	$	1.95


	2011
	March 31		June 30		September 30		December 31
Revenue	$	509,384	$	571,561	$	591,854	$	596,749
Operating income	$	74,821	$	83,863	$	98,010	$	93,868
Net income	$	46,382	$	50,657	$	60,433	$	57,473
Basic earnings per share	$	1.49	$	1.63	$	1.93	$	1.84
Diluted earnings per share	$	1.46	$	1.59	$	1.90	$	1.81

- Definition

The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished.

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