Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Investments, Owned, Federal Income Tax Note [Line Items]
Valuation allowance	$ 1,284,380	$ 975,187
Net change in valuation allowance	309,000	253,000
Unrecognized tax benefits	0	$ 0
State and Local Jurisdiction
Investments, Owned, Federal Income Tax Note [Line Items]
Operating loss carryforwards	373,000
Between 2024 and 2035 | Korea | Foreign Tax Authority
Investments, Owned, Federal Income Tax Note [Line Items]
Operating loss carryforwards	3,900,000
Between 2034 and 2037 | State and Local Jurisdiction
Investments, Owned, Federal Income Tax Note [Line Items]
Operating loss carryforwards	18,000
Indefinite | State and Local Jurisdiction
Investments, Owned, Federal Income Tax Note [Line Items]
Operating loss carryforwards	355,000
Between 2021 and 2024 | Korea | Foreign Tax Authority
Investments, Owned, Federal Income Tax Note [Line Items]
Corporate tax credit carryforward	$ 23,000