Condensed Consolidated Statements of Comprehensive Income/(Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Consolidated Net loss	$ (142,930)	$ (72,263)	$ (279,033)	$ (147,140)
Other comprehensive income/(loss):
Foreign currency translation adjustments	48	(1)	48	(1)
Net change in unrealized gains (loss) on available-for-sale marketable securities, net of tax	0	(157)	0	59
Other comprehensive income/(loss), net of tax	48	(158)	48	58
Total comprehensive loss including noncontrolling interests	(142,882)	(72,421)	(278,985)	(147,082)
Less: net loss attributable to noncontrolling interests	(2,796)	(742)	(4,682)	(1,240)
Less: cumulative translation adjustments attributable to noncontrolling interests	24	0	24	0
Total comprehensive loss attributable to noncontrolling interests	(2,772)	(742)	(4,658)	(1,240)
Total comprehensive loss attributable to common stockholders	$ (140,110)	$ (71,679)	$ (274,327)	$ (145,842)