Income Taxes - Components of Income Tax Expense (Benefit) by Jurisdiction and by Classification (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
U.S. Federal
Current	$ 35	$ 3	$ 247
Deferred	(1,093)	(3,768)	2,571
Total	(1,058)	(3,765)	2,818
State and local
Current	511	(60)	599
Deferred	1,519	883	(702)
Total	2,030	823	(103)
Foreign
Current	284	423	460
Deferred	325	0	0
Total	609	423	460
Total Income Taxes
Current	830	366	1,306
Deferred	751	(2,885)	1,869
Total	$ 1,581	$ (2,519)	$ 3,175