Income Taxes - Schedule of Loss Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments, Owned, Federal Income Tax Note [Line Items]
Income (loss) from continuing operations before income taxes, domestic	$ (296,529)	$ (8,771)	$ (109,109)
Loss before income taxes	(1,541,588)	(462,865)	(697,126)
Korea
Investments, Owned, Federal Income Tax Note [Line Items]
Income (loss) from continuing operations before income taxes, foreign	(1,226,675)	(455,683)	(589,358)
Other
Investments, Owned, Federal Income Tax Note [Line Items]
Income (loss) from continuing operations before income taxes, foreign	$ (18,384)	$ 1,589	$ 1,341