Income Taxes - Components of the Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current
Federal									$ (224)	$ 0	$ 140
State									100	58	6
Foreign									9,245	2,306	898
Total current tax expense									9,121	2,364	1,044
Deferred
Foreign									4,243	0	(873)
Total deferred tax expense (benefit)									4,243	0	(873)
Total provision for income taxes	$ 11,801	$ 600	$ 866	$ 97	$ 1,207	$ 482	$ 244	$ 431	$ 13,364	$ 2,364	$ 171