CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Activities:
Net Income (Loss)	$ (96,229)	$ (24,937)
Adjustments to reconcile to net cash provided by operations:
Depreciation, depletion and amortization	72,610	40,985
Deferred income taxes	(29,711)	0
Impairment, dry hole costs and abandonment expense	322	317
Commodity derivative (gain) loss	105,191	20,333
Settlements of commodity derivatives	4,649	(8,388)
Stock compensation and other non-cash charges	4,318	835
Amortization of deferred financing costs	640	563
(Gain) loss on sale of properties	(5)	408
Change in operating assets and liabilities:
Accounts receivable	15,470	9,166
Prepayments and other assets	(72)	(111)
Accounts payable, accrued and other liabilities	7,304	822
Amounts payable to oil and gas property owners	(10,906)	9,609
Production taxes payable	4,102	4,715
Net cash provided by (used in) operating activities	77,683	54,317
Investing Activities:
Additions to oil and gas properties, including acquisitions	(130,862)	(88,854)
Additions of furniture, equipment and other	(1,309)	(122)
Repayment of debt associated with merger, net of cash acquired	0	(53,357)
Other investing activities	(273)	(157)
Net cash provided by (used in) investing activities	(132,444)	(142,490)
Financing Activities:
Proceeds from debt	70,000	0
Principal payments on debt	(1,859)	(116)
Other financing activities	(1,496)	(1,485)
Net cash provided by (used in) financing activities	66,645	(1,601)
Increase (Decrease) in Cash and Cash Equivalents	11,884	(89,774)
Beginning Cash and Cash Equivalents	32,774	314,466
Ending Cash and Cash Equivalents	$ 44,658	$ 224,692