CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	2 Months Ended	10 Months Ended	12 Months Ended
	Dec. 31, 2016	Oct. 20, 2016	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 9,930
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Asset retirement accretion	210
Depreciation, depletion, and amortization	12,974
Share-based compensation, net of amounts capitalized to oil and gas properties	2,909
Amortization of deferred financing costs and write-off of debt issuance costs	63
Change in operating assets and liabilities:
Accounts receivable - oil and gas sales	(115)
Accounts receivable - JIB and other	(1,812)
Other current and noncurrent assets	1,783
Accounts payable	(1,555)
Accrued liabilities	(740)
Other	(3)
Net cash provided by operating activities	23,644
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in property and equipment	(23,346)
Net cash used in investing activities	(23,346)
CASH FLOWS FROM FINANCING ACTIVITIES:
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	298
Cash and cash equivalents, beginning of period	76,540
Cash and cash equivalents, end of period	76,838	$ 76,540
Predecessor
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)		1,323,079	$ (1,797,195)	$ 116,929
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
(Gains) losses on commodity derivative contracts - net			(40,960)	(139,189)
Net cash received (paid) for commodity derivative contracts not designated as hedging instruments			167,669	(18,332)
Asset retirement accretion		1,414	1,610	1,706
Depreciation, depletion, and amortization		62,302	198,643	269,935
Impairment in carrying value of oil and gas properties		232,108	1,625,776	86,471
Share-based compensation, net of amounts capitalized to oil and gas properties		2,564	4,408	8,618
Deferred income taxes			(9,641)	5,586
Amortization of deferred financing costs and write-off of debt issuance costs		4,587	11,316	7,857
Paid in kind interest expense		3,531	6,415
Amortization of deferred gain on debt restructuring		(8,246)	(14,948)
Operating lease abandonment		1,574
Non-cash reorganization items		(1,630,873)
Transaction costs for debt restructuring			34,398
Change in operating assets and liabilities:
Accounts receivable - oil and gas sales		(2,391)	26,437	33,322
Accounts receivable - JIB and other		22,002	22,833	(18,897)
Other current and noncurrent assets		(5,868)	590	3,191
Accounts payable		1,797	(4,176)	2,327
Accrued liabilities		55,160	(20,887)	(7,733)
Other		(743)	1,095	(247)
Net cash provided by operating activities		61,997	213,383	351,544
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in property and equipment		(133,307)	(336,922)	(556,397)
Proceeds from the sale of oil and gas properties			42,366	152,133
Net cash used in investing activities		(133,307)	(294,556)	(404,264)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from long-term borrowings			625,000
Proceeds from revolving credit facility		249,384	33,000	165,000
Repayment of long-term borrowings		(60,000)
Repayment of revolving credit facility		(121,324)	(468,150)	(131,000)
Deferred financing costs		(1,250)	(4,254)	(958)
Transaction costs for debt restructuring			(34,398)
Acquisition of treasury stock		(53)	(489)	(1,928)
Net cash provided by financing activities		66,757	150,709	31,114
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		(4,553)	69,536	(21,606)
Cash and cash equivalents, beginning of period	$ 76,540	81,093	11,557	33,163
Cash and cash equivalents, end of period		$ 76,540	$ 81,093	$ 11,557