Earnings Per Share

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

Earnings Per Share

(10)Earnings Per Share

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

		2011		2010		2009
Net earnings		$	255,243	$	345,096	$	353,868
Less: net earnings attributable to unvested restricted stock			(3,864)		(3,926)		(1,928)
	Net earnings available to common stock	$	251,379	$	341,170	$	351,940
Weighted-average common shares outstanding			109,051		113,863		112,200
Dilutive effect of outstanding options (determined using treasury
	stock method)		189		214		312
Dilutive effect of convertible debt (determined using treasury
	stock method)		-		0		546
	Weighted-average common shares and potential common
	shares outstanding		109,240		114,077		113,058
Anti-dilutive stock options not included in treasury stock
	method computation		2,426		4,451		5,376