Income Taxes - Components of Loss Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax [Line Items]
Loss from continuing operations before income taxes	$ (208,687)	$ (429,742)	$ (78,367)
Domestic
Income Tax [Line Items]
Loss from continuing operations before income taxes	(205,413)	(428,410)	(24,965)
Foreign
Income Tax [Line Items]
Loss from continuing operations before income taxes	$ (3,274)	$ (1,332)	$ (53,402)