Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2014

Earnings Per Share [Abstract]

Schedule of calculation of basic and diluted earnings per share

The following table sets forth the calculations of basic and diluted earnings per share:

	For the Three Months Ended March 31,
	2014		2013
	(in thousands, except per share amounts)
Net income	$	65,607	$	16,727
Basic weighted-average common shares outstanding	67,056		66,211
Add: dilutive effect of stock options, unvested RSUs, and contingent PSUs	1,070		1,310
Diluted weighted-average common shares outstanding	68,126		67,521
Basic net income per common share	$	0.98	$	0.25
Diluted net income per common share	$	0.96	$	0.25