Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 20,405	$ 25,170	$ 26,296
State	2,312	349	(796)
Foreign	738	931	905
Total, Current	23,455	26,450	26,405
Deferred:
Federal	10,133	5,474	5,256
State	(1,023)	(2,682)	(380)
Foreign	(1,715)	(1,691)	(559)
Total, Deferred	7,395	1,101	4,317
Income tax expense	30,850	$ 27,551	$ 30,722
Tax benefit resulting from early adoption of ASU 2016-09	$ 500