CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning Balance (Predecessor) at Dec. 31, 2015	$ (39,789,000)	$ 55,000	$ (860,000)	$ 1,648,687,000	$ (1,705,623,000)	$ 17,952,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) | Predecessor	(590,586,000)				(590,586,000)
Adjustment for fair value accounting of derivatives, net of tax | Predecessor	(24,025,000)					(24,025,000)
Adjustment for foreign currency translation, net of tax | Predecessor	6,073,000					6,073,000
Exercise of stock options, vesting of restricted stock and granting of stock awards | Predecessor	(731,000)	1,000		(732,000)
Amortization of stock compensation expense | Predecessor	11,776,000			11,776,000
Ending Balance (Predecessor) at Dec. 31, 2016	(637,282,000)	56,000	(860,000)	1,659,731,000	(2,296,209,000)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) | Predecessor	630,317,000				630,317,000
Adjustment for fair value accounting of derivatives, net of tax | Predecessor	0
Adjustment for foreign currency translation, net of tax | Predecessor	0
Exercise of stock options, vesting of restricted stock and granting of stock awards | Predecessor	(172,000)			(172,000)
Amortization of stock compensation expense | Predecessor	3,527,000			3,527,000
Issuance of Successor common stock and warrants	554,628,000	200,000		554,428,000
Ending Balance (Predecessor) at Feb. 28, 2017	(3,610,000)	56,000	(860,000)	1,663,086,000	(1,665,892,000)	0
Ending Balance at Feb. 28, 2017	554,628,000	200,000		554,428,000	0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cancellation of Predecessor equity | Predecessor	3,610,000	(56,000)	$ 860,000	(1,663,086,000)	1,665,892,000
Net income (loss)	(264,777,000)				(264,777,000)
Adjustment for fair value accounting of derivatives, net of tax	0
Adjustment for foreign currency translation, net of tax	0
Exercise of stock options, vesting of restricted stock and granting of stock awards	(19,000)			(19,000)
Amortization of stock compensation expense	914,000			914,000
Ending Balance at Sep. 30, 2017	$ 290,746,000	$ 200,000		$ 555,323,000	$ (264,777,000)	$ 0