CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating Activities:
Net Income (Loss)	$ (1,099,072)	$ (87,025)
Adjustments to reconcile to net cash provided by operations:
Depreciation, depletion and amortization	125,355	230,170
Deferred income taxes	(95,862)	(25,271)
Impairment and abandonment expense	1,269,049	2,487
Commodity derivative (gain) loss	(144,649)	54,600
Settlements of commodity derivatives	92,506	7,731
Stock compensation and other non-cash charges	3,947	9,501
Amortization of deferred financing costs	2,854	1,917
(Gain) loss on sale of properties	4,797	2,901
Change in operating assets and liabilities:
Accounts receivable	8,012	13,488
Prepayments and other assets	(1,609)	(1,109)
Accounts payable, accrued and other liabilities	(5,840)	3,867
Amounts payable to oil and gas property owners	(4,748)	(16,784)
Production taxes payable	(28,012)	(1,079)
Net cash provided by (used in) operating activities	126,728	195,394
Investing Activities:
Additions to oil and gas properties, including acquisitions	(118,281)	(375,976)
Additions of furniture, equipment and other	(855)	(3,958)
Other investing activities	3,602	(66)
Net cash provided by (used in) investing activities	(115,534)	(380,000)
Financing Activities:
Proceeds from debt	120,000	200,000
Principal payments on debt	(120,000)	(26,859)
Other financing activities	(749)	(1,741)
Net cash provided by (used in) financing activities	(749)	171,400
Increase (Decrease) in Cash and Cash Equivalents	10,445	(13,206)
Beginning Cash and Cash Equivalents	16,449	32,774
Ending Cash and Cash Equivalents	$ 26,894	$ 19,568