Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net loss attributable to common stockholders	$ (330,277)	$ (282,267)
Other comprehensive gain (loss), net of tax:
Change in net unrealized gain (loss)		20,805
Less: Reclassification adjustment for net (gains) losses into net loss	(5,570)
Net unrealized gain (loss) on derivatives	(5,570)	20,805
Foreign currency translation adjustment	8,541	(3,684)
Other comprehensive income	2,971	17,121
Comprehensive loss	$ (327,306)	$ (265,146)