Income Taxes - Components of Provision for Income Tax(Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Federal
Current	$ 6,412	$ 10,551	$ 19,545
Deferred	(1,608)	1,901	(7,609)
Federal income taxes	4,804	12,452	11,936
State and Local
Current	7,014	9,075	13,422
Deferred	(2,026)	1,158	(4,693)
State and local taxes	4,988	10,233	8,729
Foreign
Current	10,727	16,656	6,869
Deferred	(17,231)	(1,720)	(9,925)
Foreign income taxes	(6,504)	14,936	(3,056)
Total provision	$ 3,288	$ 37,621	$ 17,609