CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	2 Months Ended	4 Months Ended	6 Months Ended
	Feb. 28, 2017	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income (loss)		$ (266,074)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization		49,000
Write-down of oil and gas properties		256,435
Accretion expense		11,603
Deferred income tax provision		0
Gain on sale of oil and gas properties		(27)
Settlement of asset retirement obligations		(32,836)
Non-cash stock compensation expense		391
Non-cash derivative (income) expense		(6,669)
Non-cash interest expense		0
Non-cash reorganization items		0
Other non-cash expense		821
Change in current income taxes		(3,578)
Decrease in accounts receivable		8,131
(Increase) decrease in other current assets		3,049
Decrease in accounts payable		(876)
Increase (decrease) in other current liabilities		7,321
Investment in derivative contracts		(2,416)
Other		3,632
Net cash provided by (used in) operating activities		27,907
Cash flows from investing activities:
Investment in oil and gas properties		(25,492)
Proceeds from sale of oil and gas properties, net of expenses		15,929
Investment in fixed and other assets		(83)
Change in restricted funds		26,906
Net cash provided by (used in) investing activities		17,260
Cash flows from financing activities:
Proceeds from bank borrowings		0
Repayments of bank borrowings		0
Repayments of building loan		(135)
Cash payment to noteholders		0
Debt issuance costs		0
Net payments for share-based compensation		(19)
Net cash provided by (used in) financing activities		(154)
Effect of exchange rate changes on cash		0
Net change in cash and cash equivalents		45,013
Cash and cash equivalents, beginning of period		162,966
Cash and cash equivalents, end of period	$ 162,966	207,979
Predecessor
Cash flows from operating activities:
Net income (loss)	630,317		$ (384,545)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	37,429		107,789
Write-down of oil and gas properties	0		247,853
Accretion expense	5,447		20,065
Deferred income tax provision	0		9,059
Gain on sale of oil and gas properties	(213,453)		0
Settlement of asset retirement obligations	(3,641)		(10,706)
Non-cash stock compensation expense	2,645		4,682
Non-cash derivative (income) expense	1,778		1,025
Non-cash interest expense	0		9,403
Non-cash reorganization items	(458,677)		0
Other non-cash expense	172		6,081
Change in current income taxes	3,570		(3,187)
Decrease in accounts receivable	6,354		9,755
(Increase) decrease in other current assets	(2,274)		(5,283)
Decrease in accounts payable	(4,652)		(321)
Increase (decrease) in other current liabilities	(9,653)		(5,920)
Investment in derivative contracts	(3,736)		0
Other	2,490		(7,880)
Net cash provided by (used in) operating activities	(5,884)		(2,130)
Cash flows from investing activities:
Investment in oil and gas properties	(8,754)		(179,311)
Proceeds from sale of oil and gas properties, net of expenses	505,383		0
Investment in fixed and other assets	(61)		(898)
Change in restricted funds	(75,547)		1,045
Net cash provided by (used in) investing activities	421,021		(179,164)
Cash flows from financing activities:
Proceeds from bank borrowings	0		477,000
Repayments of bank borrowings	(341,500)		(135,500)
Repayments of building loan	(24)		(189)
Cash payment to noteholders	(100,000)		0
Debt issuance costs	1,055		900
Net payments for share-based compensation	(173)		(673)
Net cash provided by (used in) financing activities	(442,752)		339,738
Effect of exchange rate changes on cash	0		(9)
Net change in cash and cash equivalents	(27,615)		158,435
Cash and cash equivalents, beginning of period	190,581	$ 162,966	10,759
Cash and cash equivalents, end of period	$ 162,966		$ 169,194