Reconciliation of Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

Schedule of earnings per share reconciliation

Years ended December 31,
(in thousands, except per share amounts)			2011					2010					2009
	Net Income		Shares	Per Share Amount		Net Income		Shares	Per Share Amount		Net Income		Shares	Per Share Amount
Basic EPS	$	259,624	72,056	$	3.60	$	290,807	71,845	$	4.05	$	256,325	71,667	$	3.58
Effect of dilutive securities
Performance share awards			—					—					108
Stock options			270					190					78
Non-vested restricted stock			6					16					32
Diluted EPS	$	259,624	72,332	$	3.59	$	290,807	72,051	$	4.04	$	256,325	71,885	$	3.57