Reconciliation of Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2012

Earnings Per Share [Abstract]

Schedule of Earnings Per Share Reconciliation

	Three months ended					Three months ended
(in thousands, except per share amounts)	June 30, 2012					June 30, 2011
	Net			Per Share		Net			Per Share
	Income		Shares	Amount		Income		Shares	Amount
Basic EPS	$	131,287	72,117	$	1.82	$	63,325	72,065	$	0.88
Effect of dilutive securities
Stock options			205					347
Non-vested restricted stock			8					8
Diluted EPS	$	131,287	72,330	$	1.82	$	63,325	72,420	$	0.87

	Six months ended					Six months ended
(in thousands, except per share amounts)	June 30, 2012					June 30, 2011
	Net			Per Share		Net			Per Share
	Income		Shares	Amount		Income		Shares	Amount
Basic EPS	$	188,693	72,110	$	2.62	$	157,593	72,033	$	2.19
Effect of dilutive securities
Stock options			218					324
Non-vested restricted stock			8					7
Diluted EPS	$	188,693	72,336	$	2.61	$	157,593	72,364	$	2.18