Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net loss attributable to common stockholders	$ (709,551)	$ (330,277)
Unrealized gains (losses) on derivatives:
Reclassification adjustment for net losses into net loss		(5,570)
Net unrealized loss on derivatives		(5,570)
Foreign currency translation adjustment	49,573	8,541
Other comprehensive income	49,573	2,971
Comprehensive loss	$ (659,978)	$ (327,306)