Income Taxes- Components of Income and Provision for (Benefit from) Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Components of income (loss) before provision for (benefit from) income taxes
United States									$ (147,860)	$ (272,326)	$ (645,465)
Foreign									80,494	(285,474)	(89,410)
Loss from continuing operations before provision for income taxes	$ 20,306	$ (39,034)	$ (18,021)	$ (30,617)	$ (76,048)	$ (92,486)	$ (190,861)	$ (198,405)	(67,366)	(557,800)	(734,875)
Current taxes:
United States									(3,821)	25,623	2,853
Foreign									1,794	831	2,457
State									1,836	3,629	1,366
Total current taxes									(191)	30,083	6,676
Deferred taxes:
United States									18,659	497	244
Foreign									(3,359)	(355)	0
State									1,556	156	38
Total deferred taxes									16,856	298	282
Provision for income taxes	$ (7,453)	$ 503	$ 18,130	$ 5,485	$ (1,379)	$ 1,330	$ 30,131	$ 299	$ 16,665	$ 30,381	$ 6,958