CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating Activities:
Net Income (Loss)	$ (1,083,267)	$ (98,139)
Adjustments to reconcile to net cash provided by operations:
Depreciation, depletion and amortization	99,833	145,222
Deferred income taxes	(95,280)	(29,601)
Impairment and abandonment expense	1,266,236	1,317
Commodity derivative (gain) loss	(158,395)	85,647
Settlements of commodity derivatives	69,447	3,656
Stock compensation and other non-cash charges	2,645	6,980
Amortization of deferred financing costs	2,287	1,275
(Gain) loss on sale of properties	4,779	2,901
Change in operating assets and liabilities:
Accounts receivable	(2,413)	18,475
Prepayments and other assets	(1,905)	(1,463)
Accounts payable, accrued and other liabilities	(16,441)	(6,733)
Amounts payable to oil and gas property owners	(12,696)	(22,923)
Production taxes payable	(14,522)	(8,069)
Net cash provided by (used in) operating activities	60,308	98,545
Investing Activities:
Additions to oil and gas properties, including acquisitions	(110,841)	(258,153)
Additions of furniture, equipment and other	(653)	(3,574)
Other investing activities	3,189	(98)
Net cash provided by (used in) investing activities	(108,305)	(261,825)
Financing Activities:
Proceeds from debt	120,000	150,000
Principal payments on debt	(85,000)	(1,859)
Other financing activities	(716)	(1,523)
Net cash provided by (used in) financing activities	34,284	146,618
Increase (Decrease) in Cash and Cash Equivalents	(13,713)	(16,662)
Beginning Cash and Cash Equivalents	16,449	32,774
Ending Cash and Cash Equivalents	$ 2,736	$ 16,112