Income Taxes - Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ (6,584)	$ (1,663)	$ (15,412)
State	(1,166)	(269)	(1,298)
Foreign	11	0	6
Current, total	(7,739)	(1,932)	(16,704)
Deferred:
Federal	(781)	12	(5,256)
State	(688)	19	19
Deferred, total	(1,469)	31	(5,237)
Total income tax benefit	$ (9,208)	$ (1,901)	$ (21,941)