Net (Loss) Income Per Common Share - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income (loss) attributable to noncontrolling interest	$ (19,570,000)	$ 10,759,000	$ 436,000	$ (10,480,000)
Net income (loss) attributable to Earthstone Energy, Inc			0	0
Class B Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income (loss) attributable to noncontrolling interest			$ 400,000	$ 10,500,000