Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

Computation Of Basic And Diluted Income Per Common Share

	Year Ended December 31,
	2011		2010		2009
	(In thousands, except per share data)
Numerator:
Net income	$	158,027	$	205,435	$	265,895
Denominator:
Basic common shares outstanding		99,281		101,678		101,577
Effect of dilutive securities:
Stock options		282		238		74
Unvested restricted stock		813		692		707
Diluted common shares outstanding		100,376		102,608		102,358
Basic income per common share	$	1.59	$	2.02	$	2.62
Diluted income per common share	$	1.57	$	2.00	$	2.60