Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings (Deficit)
Beginning balance (in shares) (Predecessor) at Dec. 31, 2014		43,500,032
Beginning balance (Predecessor) at Dec. 31, 2014	$ 342,653	$ 435	$ 369,920	$ (12,635)	$ (15,067)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances of restricted stock | Predecessor			(3,779)	3,779
Amortization of share based compensation | Predecessor	13,728		13,728
Purchase of treasury stock | Predecessor	(5,742)			(5,742)
Exercise of stock options / vesting of restricted stock | Predecessor	(2,556)		(5,140)	2,584
Net loss | Predecessor	(241,745)				(241,745)
Ending balance (in shares) (Predecessor) at Dec. 31, 2015		43,500,032
Ending balance (Predecessor) at Dec. 31, 2015	106,338	$ 435	374,729	(12,014)	(256,812)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances of restricted stock | Predecessor			(5,135)	5,135
Amortization of share based compensation | Predecessor	17,675		17,675
Purchase of treasury stock | Predecessor	(640)			(640)
Net loss | Predecessor	(123,373)				(123,373)
Implementation of Prepackaged Plan and Application of Fresh Start Accounting:
Cancellation of Predecessor equity (in shares)		(43,500,032)
Cancellation of Predecessor equity	0	$ (435)	(387,269)	7,519	380,185
Issuances of successor common stock and warrants (in shares)		26,095,431
Issuances of Successor common stock and warrants	414,408	$ 261	417,624	(3,477)
Ending balance (in shares) at Dec. 31, 2016		26,095,431
Ending balance at Dec. 31, 2016	414,408	$ 261	417,624	(3,477)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances of restricted stock (in shares)		276,141
Issuances of restricted stock		$ 3	(3)
Amortization of share based compensation	22,954		22,954
Purchase of treasury stock	(2,035)		(1,058)	(977)
Net loss	(96,674)				(96,674)
Ending balance (in shares) at Dec. 31, 2017		26,371,572
Ending balance at Dec. 31, 2017	$ 338,653	$ 264	$ 439,517	$ (4,454)	$ (96,674)