Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
REVENUES
Total revenues	$ 110,384	$ 41,047	$ 275,627	$ 107,848
OPERATING COSTS AND EXPENSES
Lease operating expense	12,983	7,044	35,579	21,971
Production and ad valorem taxes	7,225	2,696	17,428	7,198
Rig termination expense	0	0	0	426
Depreciation, depletion and amortization	27,059	28,538	77,493	76,096
Impairment expense	0	2,115	0	62,548
General and administrative expense	7,650	5,796	25,200	19,615
Transaction costs	293	(705)	2,906	(324)
Accretion of asset retirement obligations	323	47	916	137
Exploration expense	296	0	326	298
Total operating costs and expenses	55,829	45,531	159,848	187,965
Gain on sale of oil and gas properties	392	0	740	198
Income (loss) from operations	54,947	(4,484)	116,519	(79,919)
OTHER INCOME (EXPENSE)
Interest expense, net	(3,050)	(1,186)	(7,668)	(4,207)
(Loss) gain on derivative contracts, net	(33,128)	(6,040)	(117,566)	73,065
Other income, net	520	(18)	823	120
Total other income (expense)	(35,658)	(7,244)	(124,411)	68,978
Income (loss) before income taxes	19,289	(11,728)	(7,892)	(10,941)
Income tax (expense) benefit	(451)	(130)	343	(112)
Net income (loss)	18,838	(11,858)	(7,549)	(11,053)
Less: Net income (loss) attributable to noncontrolling interest	8,420	(6,413)	(3,263)	(5,977)
Net income (loss) attributable to Earthstone Energy, Inc.	$ 10,418	$ (5,445)	$ (4,286)	$ (5,076)
Net income (loss) per common share attributable to Earthstone Energy, Inc.:
Basic (in dollars per share)	$ 0.21	$ (0.18)	$ (0.09)	$ (0.17)
Diluted (in dollars per share)	$ 0.20	$ (0.18)	$ (0.09)	$ (0.17)
Weighted average common shares outstanding:
Basic (in shares)	49,243,185	30,073,635	45,406,952	29,810,705
Diluted (in shares)	52,662,942	30,073,635	45,406,952	29,810,705
Oil
REVENUES
Total revenues	$ 74,051	$ 33,158	$ 205,788	$ 93,017
Natural gas
REVENUES
Total revenues	14,368	2,642	26,910	4,855
Natural gas liquids
REVENUES
Total revenues	$ 21,965	$ 5,247	$ 42,929	$ 9,976