Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ (702)	$ (3,237)	$ 32,600
State and local	199	(762)	5,677
Foreign	1,385	1,224	1,409
Total current income tax provision	882	(2,775)	39,686
Deferred:
Federal	3,523	1,756	19,741
State and local	1,696	519	1,830
Foreign	810	258	244
Total deferred income tax provision	6,029	2,533	21,815
Federal	2,821	(1,481)	52,341
State and local	1,895	(243)	7,507
Foreign	2,195	1,482	1,653
Total income tax expense	$ 6,911	$ (242)	$ 61,501