Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
REVENUES
Oil	$ 31,903,000	$ 21,563,000	$ 66,320,000	$ 34,082,000
Natural gas	1,783,000	2,131,000	4,467,000	3,825,000
Natural gas liquids	3,464,000	2,083,000	7,258,000	3,213,000
Total revenues	37,150,000	25,777,000	78,045,000	41,120,000
OPERATING COSTS AND EXPENSES
Lease operating expense	5,009,000	5,243,000	9,666,000	9,582,000
Severance taxes	1,824,000	1,327,000	3,861,000	2,117,000
Impairment expense	0	66,648,000	0	66,648,000
Depreciation, depletion and amortization	10,812,000	10,039,000	20,520,000	17,928,000
General and administrative expense	7,286,000	7,385,000	13,865,000	12,188,000
Transaction costs	0	3,764,000	0	4,567,000
Accretion of asset retirement obligation	43,000	154,000	84,000	306,000
Exploration expense	0	1,000	0	1,000
Total operating costs and expenses	24,974,000	94,561,000	47,996,000	113,337,000
Gain on sale of oil and gas properties	63,000	1,691,000	512,000	1,691,000
Income (loss) from operations	12,239,000	(67,093,000)	30,561,000	(70,526,000)
OTHER INCOME (EXPENSE)
Interest expense, net	(610,000)	(633,000)	(1,223,000)	(970,000)
Write-off of deferred financing costs	0	(526,000)	0	(526,000)
(Loss) gain on derivative contracts, net	(10,850,000)	3,340,000	(16,125,000)	7,800,000
Other income, net	391,000	31,000	397,000	32,000
Total other income (expense)	(11,069,000)	2,212,000	(16,951,000)	6,336,000
Income (loss) before income taxes	1,170,000	(64,881,000)	13,610,000	(64,190,000)
Income tax benefit	302,000	9,914,000	53,000	9,952,000
Net income (loss)	1,472,000	(54,967,000)	13,663,000	(54,238,000)
Net income attributable to noncontrolling interest	822,000	(37,844,000)	7,692,000	(37,844,000)
Net income (loss) attributable to Earthstone Energy, Inc.	$ 650,000	$ (17,123,000)	$ 5,971,000	$ (16,394,000)
Net income (loss) per common share attributable to Earthstone Energy, Inc.:
Basic (in dollars per share)	$ 0.02	$ (0.75)	$ 0.21	$ (0.73)
Diluted (in dollars per share)	$ 0.02	$ (0.75)	$ 0.21	$ (0.73)
Weighted average common shares outstanding:
Basic (in shares)	27,987,509	22,728,011	27,886,220	22,503,750
Diluted (in shares)	28,036,052	22,728,011	27,967,421	22,503,750