Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (17,876)	$ (56,777)	$ (147,496)	$ (252,455)
Other comprehensive income (loss), net of taxes:
Unrealized gain (loss) on available-for-sale securities	0	(12)	(23)	14
Change in derivative instruments designated and qualifying in cash flow hedges	573	(2,444)	(8,144)	(8,137)
Other comprehensive income (loss), net of taxes	573	(2,456)	(8,167)	(8,123)
Comprehensive loss	(17,303)	(59,233)	(155,663)	(260,578)
Less: Comprehensive loss attributable to noncontrolling interests and redeemable noncontrolling interests	(5,349)	(7,484)	(25,219)	(21,719)
Comprehensive loss attributable to Class A and Class B stockholders	$ (11,954)	$ (51,749)	$ (130,444)	$ (238,859)