Condensed Consolidated Statements of Comprehensive Income/(Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Consolidated Net loss	$ (77,190)	$ (50,014)	$ (356,223)	$ (197,154)
Other comprehensive income/(loss):
Foreign currency translation adjustments	(4)	52	44	51
Net change in unrealized gains (loss) on available-for-sale marketable securities, net of tax	0	(78)	0	(19)
Other comprehensive income/(loss), net of tax	(4)	(26)	44	32
Total comprehensive loss including noncontrolling interests	(77,194)	(50,040)	(356,179)	(197,122)
Less: net loss attributable to noncontrolling interests	(3,188)	(1,401)	(7,870)	(2,641)
Less: cumulative translation adjustments attributable to noncontrolling interests	(2)	26	22	26
Total comprehensive loss attributable to noncontrolling interests	(3,190)	(1,375)	(7,848)	(2,615)
Total comprehensive loss attributable to common stockholders	$ (74,004)	$ (48,665)	$ (348,331)	$ (194,507)