Earnings per Share (Tables)

12 Months Ended

Dec. 31, 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:

	Year Ended December 31,
	2018		2017		2016
	(in thousands, except per-share amounts)
Numerator:
Net income (1)	$	155,749	$	415,522	$	263,483
Denominator:
Weighted-average shares outstanding, basic	68,249		69,221		70,344
Effect of dilutive stock awards	182		156		164
Adjusted weighted-average shares outstanding, diluted	68,431		69,377		70,508
Earnings per Share:
Basic earnings per common share (1)	$	2.28	$	6.00	$	3.75
Diluted earnings per common share (1)	$	2.28	$	5.99	$	3.74
Anti-dilutive weighted-average shares	145		85		66