Earnings per Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings per Share [Abstract]

Calculations of the Basic and Diluted EPS

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands, except per share amounts)	2016		2015		2016		2015
Net income	$	28,801	$	19,677	$	65,561	$	36,580
Weighted-average common shares outstanding - basic		49,185		49,070		49,132		48,951
Effect of diluted stock options and unvested restricted stock		915		705		517		767
Weighted-average common shares outstanding - diluted		50,100		49,775		49,649		49,718
Net income per share:
Basic	$	0.59	$	0.40	$	1.33	$	0.75
Diluted	$	0.57	$	0.40	$	1.32	$	0.74
Anti-dilutive shares not included above		610		1,580		1,339		909