Income Taxes - Components of Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current
Federal	$ 5,967	$ 6,200	$ 6,180
State and local	577	1,587	1,739
Foreign	6,597	6,138	8,632
Provision for income taxes, current	13,141	13,925	16,551
Deferred
Federal	5,471	7,506	5,950
State and local	563	488	(248)
Foreign	748	1,219	(767)
Provision for income taxes, deferred	6,782	9,213	4,935
Provision for income taxes	$ 19,923	$ 23,138	$ 21,486