Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Consolidated Statement of Comprehensive Income [Abstract]
Net income	$ (117,998)	$ (821,197)	$ (675,658)	$ (1,617,323)
Change in cumulative translation adjustment	(4,693)	(7,483)	(26,616)	(7,928)
Comprehensive income	$ (122,691)	$ (828,680)	$ (702,274)	$ (1,625,251)