CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating Activities:
Net Income (Loss)	$ (98,139)	$ (71,843)
Adjustments to reconcile to net cash provided by operations:
Depreciation, depletion and amortization	145,222	93,160
Deferred income taxes	(29,601)	0
Impairment, dry hole costs and abandonment expense	1,317	425
Commodity derivative (gain) loss	85,647	76,619
Settlements of commodity derivatives	3,656	(23,848)
Stock compensation and other non-cash charges	6,980	3,490
Amortization of deferred financing costs	1,275	1,131
(Gain) loss on sale of properties	2,901	972
Change in operating assets and liabilities:
Accounts receivable	18,475	(4,197)
Prepayments and other assets	(1,463)	(1,089)
Accounts payable, accrued and other liabilities	(6,733)	(36,033)
Amounts payable to oil and gas property owners	(22,923)	25,532
Production taxes payable	(8,069)	4,568
Net cash provided by (used in) operating activities	98,545	68,887
Investing Activities:
Additions to oil and gas properties, including acquisitions	(258,153)	(220,816)
Additions of furniture, equipment and other	(3,574)	(470)
Repayment of debt associated with merger, net of cash acquired	0	(53,357)
Proceeds from sale of properties	1,334	194
Other investing activities	(1,432)	336
Net cash provided by (used in) investing activities	(261,825)	(274,113)
Financing Activities:
Proceeds from debt	150,000	0
Principal payments on debt	(1,859)	(232)
Other financing activities	(1,523)	(1,629)
Net cash provided by (used in) financing activities	146,618	(1,861)
Increase (Decrease) in Cash and Cash Equivalents	(16,662)	(207,087)
Beginning Cash and Cash Equivalents	32,774	314,466
Ending Cash and Cash Equivalents	$ 16,112	$ 107,379