Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

Reconciliation Between Basic and Diluted Earnings Per Share

A reconciliation between basic and diluted earnings per share is as follows (in thousands, except per share data):

	Quarter Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Net income for basic and diluted earnings per share	$	490,248	$	365,701	$	654,378	$	466,674
Weighted-average common shares outstanding	222,523		219,744		222,007		219,450
Dilutive effect of stock options, performance share awards and restricted stock awards	1,336		1,260		1,344		1,294
Diluted weighted-average shares outstanding	223,859		221,004		223,351		220,744
Basic earnings per share	$	2.20	$	1.66	$	2.95	$	2.13
Diluted earnings per share	$	2.19	$	1.65	$	2.93	$	2.11