Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table presents the computations for basic and diluted earnings per common share:

	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
	(in thousands, except shares and per share amounts)
Numerator:
Net income	$	27,761	$	320,886	$	50,439	$	334,177
Denominator:
Weighted average shares outstanding - basic	62,289,437		62,112,936		62,265,941		62,095,670
Dilutive securities outstanding	818,476		497,118		810,540		552,482
Weighted average shares outstanding - diluted	63,107,913		62,610,054		63,076,481		62,648,152
Earnings per share - basic	$	0.45	$	5.17	$	0.81	$	5.38
Earnings per share - diluted	$	0.44	$	5.13	$	0.80	$	5.33
Antidilutive securities outstanding (weighted average):
Stock options	26,496		9,875		22,844		12,533
Restricted shares	172		484		1,364		1,836
Total antidilutive securities outstanding	26,668		10,359		24,208		14,369