Net Income (Loss) Per Common Share - Narrative (Details) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net income (loss) attributable to noncontrolling interest	$ 10,759,000	$ 822,000	$ (10,480,000)	$ 7,692,000
Dilutive effect on Net income (loss) per common share attributable to Earthstone Energy, Inc			$ 0
Antidilutive securities excluded from calculation of earnings per share (in shares)			348,224

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities.

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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