Permanent Equity - Accumulated Other Comprehensive Income (Loss) Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 4,207,390	$ (352,513)	$ (120,115)	$ (339,062)
Other comprehensive (loss) income before reclassifications	54	24	(292)	(19)
Total other comprehensive income (loss)	54	24	(292)	(19)
Ending balance	4,248,529	(380,268)	4,248,529	(380,268)
Accumulated Other Comprehensive Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(512)	(64)	(166)	(21)
Total other comprehensive income (loss)	54	24	(292)	(19)
Ending balance	(458)	(40)	(458)	(40)
Available-for-Sale Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	0	0	0	0
Other comprehensive (loss) income before reclassifications	(150)	0	(150)	0
Total other comprehensive income (loss)	(150)	0	(150)	0
Ending balance	(150)	0	(150)	0
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(512)	(64)	(166)	(21)
Other comprehensive (loss) income before reclassifications	204	24	(142)	(19)
Total other comprehensive income (loss)	204	24	(142)	(19)
Ending balance	$ (308)	$ (40)	$ (308)	$ (40)