Earnings per Share (Tables)

9 Months Ended

Sep. 30, 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 September 30,				For the Nine Months Ended September 30,
	2014		2013		2014		2013
	(in thousands, except per share amounts)
Net income	$	208,938	$	70,690	$	334,325	$	163,939
Basic weighted-average common shares outstanding	67,379		66,943		67,169		66,486
Add: dilutive effect of stock options, unvested RSUs, and contingent PSUs	1,051		1,310		1,089		1,483
Diluted weighted-average common shares outstanding	68,430		68,253		68,258		67,969
Basic net income per common share	$	3.10	$	1.06	$	4.98	$	2.47
Diluted net income per common share	$	3.05	$	1.04	$	4.90	$	2.41