Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

Earnings per share

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(In thousands, except per share amounts)	2011		2010		2011		2010
Numerator
Net income	$	36,213	$	32,084	$	107,414	$	78,029
Denominator
Weighted average number of shares — basic		64,023		62,771		64,300		62,316
Effect of dilutive securities
Stock options		882		1,491		1,346		1,286
Restricted stock and restricted stock units		56		38		51		36
Weighted average number of shares — diluted		64,961		64,300		65,697		63,638
Net income per share — basic	$	0.57	$	0.51	$	1.67	$	1.25
Net income per share — diluted	$	0.56	$	0.50	$	1.63	$	1.23