Earnings per Share (Tables)

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per common share

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
	(in thousands, except per share amounts)
Numerator
Net income	$	64,849	$	42,068	$	102,555	$	72,622
Denominator
Weighted-average shares outstanding, basic	72,740		72,593		72,712		72,540
Effect of dilutive stock awards	554		399		562		358
Adjusted weighted-average shares outstanding, diluted	73,294		72,992		73,274		72,898
Net Income per Share
Basic earnings per common share	$	0.89	$	0.58	$	1.41	$	1.00
Diluted earnings per common share	$	0.88	$	0.58	$	1.40	$	1.00
Anti-dilutive weighted-average shares	57		2		56		1