Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (118,740)	$ (67,500)	$ (164,056)	$ (109,939)
Other comprehensive income (loss):
Change in unrealized net gain (loss) on investments, net of tax	4,327	(244)	8,759	159
Change in unrealized gain (loss) on cash flow hedges, net of tax	9,991	(3,734)	4,002	(2,851)
Change in foreign currency translation adjustment	257	16	192	13
Total other comprehensive income (loss)	14,575	(3,962)	12,953	(2,679)
Comprehensive loss	(104,165)	(71,462)	(151,103)	(112,618)
Accretion of redeemable noncontrolling interest	(525)	(248)	(1,036)	(357)
Comprehensive loss attributable to common stockholders	$ (104,690)	$ (71,710)	$ (152,139)	$ (112,975)