Consolidated statements of cash flows - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	9 Months Ended
	Mar. 21, 2017	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities
Net (loss) income		$ (17,433)
Adjustments to reconcile net loss to net cash provided by operating activities
Non-cash reorganization items		0
Depreciation, depletion and amortization		66,432
Loss on impairment of assets		0
Write-off of Senior Note issuance costs, discount and premium		0
Derivative losses (gains)		4,089
Loss (gain) on sale of assets		876
Other		1,300
Change in assets and liabilities
Accounts receivable		(16,082)
Inventories		2,683
Prepaid expenses and other assets		2,560
Accounts payable and accrued liabilities		(13,369)
Revenue distribution payable		4,549
Deferred compensation		2,565
Net cash provided by operating activities		38,170
Cash flows from investing activities
Expenditures for property, plant, and equipment and oil and natural gas properties		(114,358)
Proceeds from asset dispositions		7,791
Proceeds from derivative instruments		15,143
Cash in escrow		42
Net cash used in investing activities		(91,382)
Cash flows from financing activities
Proceeds from long-term debt		33,000
Repayment of long-term debt		(1,154)
Proceeds from rights offering, net		0
Principal payments under capital lease obligations		(1,362)
Payment of other financing fees		0
Net cash provided by (used in) financing activities		30,484
Net (decrease) increase in cash and cash equivalents		(22,728)
Cash and cash equivalents at beginning of period		45,123
Cash and cash equivalents at end of period	$ 45,123	22,395
Predecessor
Cash flows from operating activities
Net (loss) income	1,041,959		$ (400,551)
Adjustments to reconcile net loss to net cash provided by operating activities
Non-cash reorganization items	(1,012,090)		0
Depreciation, depletion and amortization	24,915		94,396
Loss on impairment of assets	0		282,540
Write-off of Senior Note issuance costs, discount and premium	0		16,970
Derivative losses (gains)	(48,006)		9,468
Loss (gain) on sale of assets	(206)		128
Other	645		2,832
Change in assets and liabilities
Accounts receivable	198		(4,866)
Inventories	466		2,758
Prepaid expenses and other assets	(497)		(370)
Accounts payable and accrued liabilities	8,733		24,026
Revenue distribution payable	(1,875)		1,173
Deferred compensation	143		(5,384)
Net cash provided by operating activities	14,385		23,120
Cash flows from investing activities
Expenditures for property, plant, and equipment and oil and natural gas properties	(31,179)		(119,994)
Proceeds from asset dispositions	1,884		954
Proceeds from derivative instruments	1,285		90,590
Cash in escrow	0		49
Net cash used in investing activities	(28,010)		(28,401)
Cash flows from financing activities
Proceeds from long-term debt	270,000		181,000
Repayment of long-term debt	(444,785)		(1,563)
Proceeds from rights offering, net	50,031		0
Principal payments under capital lease obligations	(568)		(1,860)
Payment of other financing fees	(2,410)		0
Net cash provided by (used in) financing activities	(127,732)		177,577
Net (decrease) increase in cash and cash equivalents	(141,357)		172,296
Cash and cash equivalents at beginning of period	186,480	$ 45,123	17,065
Cash and cash equivalents at end of period	$ 45,123		$ 189,361