Net (Loss) Income Per Common Share - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income (loss) attributable to noncontrolling interest	$ (6,960,000)	$ (19,570,000)	$ (11,683,000)	$ 436,000
Class B Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock, par value (in dollars per share)	$ 0.001		$ 0.001		$ 0.001
Net income (loss) attributable to noncontrolling interest	$ (7,000,000.0)	$ (19,600,000)	$ (11,700,000)	400,000
Net income (loss) attributable to Earthstone Energy, Inc			$ 0	$ 0