Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income before income taxes:
Domestic	$ 13,988	$ 18,656	$ 38,359
Foreign	16,046	10,967	4,464
Total income before income taxes	30,034	29,623	42,823
Current:
Federal	5,511	6,802	11,799
State and local	1,152	1,418	2,600
Foreign	4,885	3,710	1,439
Total current	11,548	11,930	15,838
Deferred:
Federal	(1,039)	(198)	(9)
State and local	56	23	(23)
Foreign	(778)	(921)	(81)
Total deferred	(1,761)	(1,096)	(113)
Total income tax expense	$ 9,787	$ 10,834	$ 15,725