CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 13,575
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Deferred income taxes	4,352
(Gain) loss on sale of oil and gas properties	(1)
Depreciation, depletion and amortization	37,590
(Gain) loss on derivative financial instruments	7,657
Cash settlements of derivative financial instruments	5,388
Amortization of debt discount and issuance costs	1,574
Stock-based compensation	648
Decrease in accounts receivable	10,783
Decrease in other current assets	1,577
Decrease in accounts payable and accrued expenses	(8,428)
Net cash provided by operating activities	74,715
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(94,939)
Prepaid drilling costs	6,030
Proceeds from sale of oil and gas properties	415
Net cash used for investing activities	(88,494)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings	45,000
Repayments under bank credit facility	(25,000)
Debt and stock issuance costs	(90)
Net cash provided by financing activities	19,910
Net increase (decrease) in cash and cash equivalents	6,131
Cash and cash equivalents, beginning of period	23,193
Cash and cash equivalents, end of period	$ 29,324
Predecessor
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)		$ (41,886)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Deferred income taxes		572
(Gain) loss on sale of oil and gas properties		28,600
Depreciation, depletion and amortization		27,152
(Gain) loss on derivative financial instruments		(2,602)
Cash settlements of derivative financial instruments		1,404
Amortization of debt discount and issuance costs		11,056
Interest paid in-kind		9,845
Stock-based compensation		1,601
Decrease in accounts receivable		1,455
Decrease in other current assets		472
Decrease in accounts payable and accrued expenses		(16,113)
Net cash provided by operating activities		21,556
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures		(46,458)
Net cash used for investing activities		(46,458)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings		15,000
Stock used for tax withholdings		(365)
Net cash provided by financing activities		14,635
Net increase (decrease) in cash and cash equivalents		(10,267)
Cash and cash equivalents, beginning of period		61,255
Cash and cash equivalents, end of period		$ 50,988