CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	2 Months Ended	7 Months Ended	9 Months Ended
	Feb. 28, 2017	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income (loss)		$ (264,777)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization		76,553
Write-down of oil and gas properties		256,435
Accretion expense		19,698
Deferred income tax provision		0
(Gain) loss on sale of oil and gas properties		105
Settlement of asset retirement obligations		(53,129)
Non-cash stock compensation expense		893
Non-cash derivative expense		1,210
Non-cash interest expense		3
Non-cash reorganization items		0
Other non-cash expense		877
Change in current income taxes		(5,156)
Decrease in accounts receivable		6,059
(Increase) decrease in other current assets		2,382
Increase (decrease) in accounts payable		10,662
Increase (decrease) in other current liabilities		17,944
Investment in derivative contracts		(2,416)
Other		3,054
Net cash provided by (used in) operating activities		70,397
Cash flows from investing activities:
Investment in oil and gas properties		(42,837)
Proceeds from sale of oil and gas properties, net of expenses		17,777
Investment in fixed and other assets		(158)
Change in restricted funds		37,863
Net cash provided by (used in) investing activities		12,645
Cash flows from financing activities:
Proceeds from bank borrowings		0
Repayments of bank borrowings		0
Repayments of building loan		(275)
Cash payment to noteholders		0
Debt issuance costs		0
Net payments for share-based compensation		(19)
Net cash provided by (used in) financing activities		(294)
Effect of exchange rate changes on cash		0
Net change in cash and cash equivalents		82,748
Cash and cash equivalents, beginning of period		162,966
Cash and cash equivalents, end of period	$ 162,966	245,714
Predecessor
Cash flows from operating activities:
Net income (loss)	630,317		$ (474,180)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	37,429		166,707
Write-down of oil and gas properties	0		284,337
Accretion expense	5,447		30,147
Deferred income tax provision	0		10,947
(Gain) loss on sale of oil and gas properties	(213,453)		0
Settlement of asset retirement obligations	(3,641)		(15,106)
Non-cash stock compensation expense	2,645		6,407
Non-cash derivative expense	1,778		1,261
Non-cash interest expense	0		14,278
Non-cash reorganization items	(458,677)		0
Other non-cash expense	172		6,081
Change in current income taxes	3,570		21,584
Decrease in accounts receivable	6,354		3,968
(Increase) decrease in other current assets	(2,274)		(4,426)
Increase (decrease) in accounts payable	(4,652)		3,217
Increase (decrease) in other current liabilities	(9,653)		(14,222)
Investment in derivative contracts	(3,736)		0
Other	2,490		(8,107)
Net cash provided by (used in) operating activities	(5,884)		32,893
Cash flows from investing activities:
Investment in oil and gas properties	(8,754)		(200,622)
Proceeds from sale of oil and gas properties, net of expenses	505,383		0
Investment in fixed and other assets	(61)		(1,231)
Change in restricted funds	(75,547)		1,046
Net cash provided by (used in) investing activities	421,021		(200,807)
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)		(285)
Cash payment to noteholders	(100,000)		0
Debt issuance costs	(1,055)		(900)
Net payments for share-based compensation	(173)		(752)
Net cash provided by (used in) financing activities	(442,752)		339,563
Effect of exchange rate changes on cash	0		(9)
Net change in cash and cash equivalents	(27,615)		171,640
Cash and cash equivalents, beginning of period	190,581	$ 162,966	10,759
Cash and cash equivalents, end of period	$ 162,966		$ 182,399