Revision of Previously Issued Financial Statements - Statement of Changes in Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2016	Jun. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Increase (Decrease) Stockholders' Equity
Net income (loss)	$ (82,963)	$ (133,978)	$ (22,429)	$ (137,493)	$ (220,456)	$ (32,561)
Stockholder's Equity	651,909	761,337		761,337	651,909		$ 891,451
As filed
Increase (Decrease) Stockholders' Equity
Net income (loss)		(145,332)		(148,847)
Stockholder's Equity		749,983		749,983
Exclusion of certain prior asset impairments from held for sale assets | Adjustment
Increase (Decrease) Stockholders' Equity
Net income (loss)		11,354		11,354
Stockholder's Equity		11,354		11,354
Retained Earnings
Increase (Decrease) Stockholders' Equity
Net income (loss)				(83,603)	(148,409)
Stockholder's Equity	(181,226)	(114,454)		(114,454)	(181,226)		(8,652)
Retained Earnings | As filed
Increase (Decrease) Stockholders' Equity
Net income (loss)				(90,626)
Stockholder's Equity		(121,477)		(121,477)
Retained Earnings | Exclusion of certain prior asset impairments from held for sale assets | Adjustment
Increase (Decrease) Stockholders' Equity
Net income (loss)				7,023
Stockholder's Equity		7,023		7,023
Non-controlling Interest
Increase (Decrease) Stockholders' Equity
Net income (loss)				(53,890)	(72,047)
Stockholder's Equity	$ 298,896	398,662		398,662	$ 298,896		$ 453,237
Non-controlling Interest | As filed
Increase (Decrease) Stockholders' Equity
Net income (loss)				(58,221)
Stockholder's Equity		394,331		394,331
Non-controlling Interest | Exclusion of certain prior asset impairments from held for sale assets | Adjustment
Increase (Decrease) Stockholders' Equity
Net income (loss)				4,331
Stockholder's Equity		$ 4,331		$ 4,331