Earnings Per Share

9 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

Earnings Per Share

(7)Earnings Per Share

The following table details the numerator and denominator used in our earnings per share calculations.

		Nine months ended September 30,				Three months ended September 30,
		2011		2010		2011		2010
Net earnings		$	176,905	$	247,797	$	60,437	$	93,063
Less: net earnings attributable to unvested restricted stock awards
	and restricted stock units		(2,551)		(2,746)		(950)		(1,067)
	Net earnings available to common stock	$	174,354	$	245,051	$	59,487	$	91,996
Weighted-average common shares outstanding			110,665		113,872		106,919		114,002
Dilutive effect of outstanding options (determined using
	treasury stock method)		245		254		129		156
	Weighted-average common shares and potential common
	shares outstanding		110,910		114,126		107,048		114,158
Anti-dilutive stock options not included in treasury stock
	method computation		2,279		4,431		2,744		4,978