Income Taxes - Income (Loss) Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
U.S.	$ (92,838)	$ (15,270)	$ 4,084
Foreign	259	12,112	43,194
Income (loss) before income taxes	$ (92,579)	$ (3,158)	$ 47,278