Income Taxes - Taxes Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
U.S.—Federal	$ 0	$ (3,203)	$ (328)
U.S.—State	51	400	0
Foreign	125	0	0
Deferred:
U.S.—Federal	(20,509)	(58,461)	426
U.S.—State	(387)	(8,425)	235
Total	$ (20,720)	$ (69,689)	$ 333