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Income Taxes - Components of Loss Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax [Line Items]
Loss from continuing operations before income taxes	$ (103,855)	$ (171,264)	$ (395,912)
Domestic
Income Tax [Line Items]
Loss from continuing operations before income taxes	(97,313)	(167,990)	(394,580)
Foreign
Income Tax [Line Items]
Loss from continuing operations before income taxes	$ (6,542)	$ (3,274)	$ (1,332)

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- Definition

Income Tax [Line Items]

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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