CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Series A Preferred Stock	Common Stock	Warrants	Treasury Stock	Additional Paid-in-Capital	Retained Earnings (Deficit)	Total
Balance (Predecessor) at Dec. 31, 2013	$ 3	$ 69		$ (664)	$ 871,667	$ (531,076)	$ 339,999
Increase (Decrease) in Stockholders' Equity
Share-based compensation | Predecessor		1			10,861		10,862
Acquisition of treasury stock | Predecessor				(1,928)			(1,928)
Net income (loss) | Predecessor						116,929	116,929
Balance (Predecessor) at Dec. 31, 2014	3	70		(2,592)	882,528	(414,147)	465,862
Increase (Decrease) in Stockholders' Equity
Share-based compensation | Predecessor		3			5,753		5,756
Acquisition of treasury stock | Predecessor				(489)			(489)
Net income (loss) | Predecessor						(1,797,195)	(1,797,195)
Conversion of preferred shares | Predecessor	$ (3)	37			(34)
Balance (Predecessor) at Dec. 31, 2015		110		(3,081)	888,247	(2,211,342)	(1,326,066)
Increase (Decrease) in Stockholders' Equity
Share-based compensation | Predecessor		(6)			3,045		3,039
Acquisition of treasury stock | Predecessor				(53)			(53)
Net income (loss) | Predecessor						1,323,079	1,323,079
Balance (Predecessor) at Oct. 20, 2016		104		(3,134)	891,292	(888,263)	(1)
Increase (Decrease) in Stockholders' Equity
Issuance of successor common stock		247			510,905		511,152
Issuance of successor warrants			$ 37,329				37,329
Cancellation of predecessor equity | Predecessor		(104)		3,134	(891,292)	888,263	1
Balance (Predecessor) at Oct. 21, 2016							(1,543,897)
Balance at Oct. 21, 2016		247	37,329		510,905		548,481
Balance (Predecessor) at Oct. 20, 2016		104		$ (3,134)	891,292	(888,263)	(1)
Increase (Decrease) in Stockholders' Equity
Issuance of successor common stock		3					3
Share-based compensation					3,400		3,400
Net income (loss)						9,930	9,930
Balance at Dec. 31, 2016		$ 250	$ 37,329		$ 514,305	$ 9,930	$ 561,814