Income Taxes - Components of Income Tax (Benefit) Expense by Jurisdiction and by Classification (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
U.S. Federal
Current			$ (12)
Deferred			(12,664)
Total			(12,676)
State and local
Current	$ 589	$ 716	183
Deferred	13	104	(471)
Total	602	820	(288)
Foreign
Current	1,370	1,081	731
Deferred	4	(33)
Total	1,374	1,048	731
Total Income Taxes
Current	1,959	1,797	902
Deferred	17	71	(13,135)
Total	$ 1,976	$ 1,868	$ (12,233)