Income Taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
Federal	$ 1,414	$ 0	$ 0
State	0	0	0
Foreign	9,035	6,507	6,991
Total current expense (benefit)	10,449	6,507	6,991
Deferred
Federal	(7,366)	(15,638)	(9,652)
State	0	0	0
Foreign	0	0	0
Total deferred (benefit) expense	(7,366)	(15,638)	(9,652)
Provision for income taxes	$ 3,083	$ (9,131)	$ (2,661)