Income Taxes - Components of Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Components of loss before income taxes and income tax (expense) benefit
Loss before income taxes	$ (1,376,197)	$ (723,169)	$ (476,162)
Income tax benefit/(expense)	7,364	(839)	16,197
Net loss	(1,368,833)	(724,008)	(459,965)
Significant components of current and deferred income tax expense (benefit)
Current income tax (benefit) expense	1,170	668
Deferred tax (benefit) expense	(103,372)	(35,737)	(50,935)
Net operating loss carryforward generated	(163,827)	(87,698)	(107,536)
Valuation allowance increase (decrease)	258,665	123,606	142,274
Income tax expense/(benefit)	(7,364)	839	(16,197)
U.S.
Components of loss before income taxes and income tax (expense) benefit
Loss before income taxes	(1,211,796)	(697,342)	(466,825)
Income tax benefit/(expense)	29	868	16,540
Net loss	(1,211,767)	(696,474)	(450,285)
Significant components of current and deferred income tax expense (benefit)
Deferred tax (benefit) expense	(100,754)	(42,705)	(51,999)
Net operating loss carryforward generated	(146,174)	(92,030)	(105,498)
Valuation allowance increase (decrease)	246,899	133,867	140,957
Income tax expense/(benefit)	(29)	(868)	(16,540)
Foreign
Components of loss before income taxes and income tax (expense) benefit
Loss before income taxes	(164,401)	(25,827)	(9,337)
Income tax benefit/(expense)	7,335	(1,707)	(343)
Net loss	(157,066)	(27,534)	(9,680)
Significant components of current and deferred income tax expense (benefit)
Current income tax (benefit) expense	1,170	668
Deferred tax (benefit) expense	(2,618)	6,968	1,064
Net operating loss carryforward generated	(17,653)	4,332	(2,038)
Valuation allowance increase (decrease)	11,766	(10,261)	1,317
Income tax expense/(benefit)	$ (7,335)	$ 1,707	$ 343