Earnings per Share (Tables)

9 Months Ended

Sep. 30, 2018

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 September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
	(in thousands, except per share amounts)
Numerator
Net income	$	97,480	$	60,044	$	63,812	$	168,546
Denominator
Weighted-average shares outstanding, basic	68,254		69,370		68,243		69,363
Effect of dilutive stock awards	249		88		103		174
Adjusted weighted-average shares outstanding, diluted	68,503		69,458		68,346		69,537
Net income per share
Basic earnings per common share	$	1.43	$	0.87	$	0.94	$	2.43
Diluted earnings per common share	$	1.42	$	0.86	$	0.93	$	2.42
Anti-dilutive weighted-average shares	5		124		192		76