Earnings per Share (Tables)

6 Months Ended

Jun. 30, 2011

Earnings per Share

Schedule of calculation of basic and diluted earnings per share

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2011		2010		2011		2010
	(in thousands, except per share amounts)
Net income	$	124,533	$	18,068	$	106,030	$	144,246
Basic weighted-average common shares outstanding	63,638		62,917		63,543		62,855
Add: dilutive effect of stock options, unvested RSUs, and contingent PSAs	2,182		1,649		2,161		1,638
Add: dilutive effect of 3.50% Senior Convertible Notes	1,089		—		991		—
Diluted weighted-average common shares outstanding	66,909		64,566		66,695		64,493
Basic net income per common share	$	1.96	$	0.29	$	1.67	$	2.29
Diluted net income per common share	$	1.86	$	0.28	$	1.59	$	2.24