Income Taxes - Schedule of Domestic and Foreign Components of Loss before Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
United States	$ (170,812)	$ (325,769)	$ (35,838)
Foreign	(55,996)	(93,734)	(87,878)
Total	$ (226,808)	$ (419,503)	$ (123,716)