Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME (LOSS)	$ 13,695	$ 17,357	$ (1,910,995)	$ 71,373
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	44,731	143,894	238,273	385,942
Amortization of intangible assets	3,626	3,626	10,879	10,879
Exploration expense, non-cash			561,629	536
Impairment of oil and natural gas properties	0	0	1,381,258	0
Asset retirement obligation accretion	1,501	1,394	4,403	4,095
Amortization of deferred financing costs			2,710	2,644
Loss on derivatives, net	2,208	0	2,208	0
Deferred tax expense (benefit)	0	3,414	(77,834)	11,765
Stock based compensation			8,871	8,376
Other			(2,059)	(512)
Changes in operating assets and liabilities:
Accounts receivable			44,532	(6,937)
Accounts payable			(15,953)	16,034
Accrued liabilities			(15,468)	(22,379)
Drilling advances			(174)	10,205
Other assets and liabilities, net			(1,281)	(3,410)
Net cash provided by operating activities			230,999	488,611
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of EnerVest properties			0	4,250
Acquisitions, other			(73,702)	(93,221)
Additions to oil and natural gas properties			(157,325)	(351,467)
Changes in working capital associated with additions to oil and natural gas properties			(18,972)	(13,392)
Other investing			(842)	(247)
Net cash used in investing activities			(250,841)	(454,077)
CASH FLOW FROM FINANCING ACTIVITIES
Contributions from noncontrolling interest owners			0	7,301
Distributions to noncontrolling interest owners			(594)	(716)
Class A Common Stock repurchases			(12,962)	(9,722)
Other financing activities			(702)	(2,666)
Net cash used in financing activities			(14,258)	(5,803)
NET CHANGE IN CASH AND CASH EQUIVALENTS			(34,100)	28,731
Cash and cash equivalents – Beginning of period			182,633	135,758
Cash and cash equivalents – End of period	148,533	164,489	148,533	164,489
Supplemental non-cash operating activity:
Cash paid (received) for income taxes			(724)	390
Cash paid for interest			25,445	25,687
Supplemental non-cash investing and financing activity:
Accruals or liabilities for capital expenditures			21,750	37,241
Equity issuances in connection with acquisitions			0	33,693
Non-cash deemed dividend related to warrant exchange	$ 0	$ 2,763	0	2,763
Supplemental non-cash lease operating activity:
Right-of-use assets obtained in exchange for operating lease obligations			$ 5,500	$ 6,720