Reconciliation of Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2011

Earnings Per Share [Abstract]

Schedule of Earnings Per Share Reconciliation

	Three months ended					Three months ended
(in thousands, except per share amounts)	June 30, 2011					June 30, 2010
	Net			Per Share		Net			Per Share
	Income		Shares	Amount		Income		Shares	Amount
Basic EPS	$	63,325	72,065	$	0.88	$	55,543	71,844	$	0.77
Effect of dilutive securities
Stock options			347					228
Non-vested restricted stock			8					17
Diluted EPS	$	63,325	72,420	$	0.87	$	55,543	72,089	$	0.77

	Six months ended					Six months ended
(in thousands, except per share amounts)	June 30, 2011					June 30, 2010
	Net			Per Share		Net			Per Share
	Income		Shares	Amount		Income		Shares	Amount
Basic EPS	$	157,593	72,033	$	2.19	$	172,253	71,830	$	2.40
Effect of dilutive securities
Stock options			324					223
Non-vested restricted stock			7					16
Diluted EPS	$	157,593	72,364	$	2.18	$	172,253	72,069	$	2.39