Income Taxes - Components of Income Tax Expense (Benefit) by Jurisdiction and by Classification (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
U.S. Federal
Current	$ (12)	$ (780)	$ 35
Deferred	(12,664)	(3,986)	(1,093)
Total	(12,676)	(4,766)	(1,058)
State and local
Current	183	550	511
Deferred	(471)	(180)	1,519
Total	(288)	370	2,030
Foreign
Current	731	(145)	284
Deferred	0	0	325
Total	731	(145)	609
Total Income Taxes
Current	902	(375)	830
Deferred	(13,135)
Deferred	(13,194)	(4,166)	751
Total	$ (12,233)	$ (4,541)	$ 1,581