Noncontrolling Interest - Summary of Changes in Noncontrolling Interest (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Class A Common Stock
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
December 31, 2018 (in shares)	29,421,131
December 31, 2019 (in shares)	30,343,421	29,421,131
Earthstone Energy Holdings, LLC
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
December 31, 2018 (in shares)	64,681,811
December 31, 2019 (in shares)	65,352,792	64,681,811
Earthstone Energy Holdings, LLC | Class A Common Stock
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
EEH units issued in connection with the vesting of restricted stock units and issuance of class A common stock (in shares)	670,981
Class B common stock converted to class A common stock (in shares)	0
Earthstone Energy Holdings, LLC | EEH Units Held By Earthstone and Lynden US
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
December 31, 2018 (in shares)	29,421,131
December 31, 2019 (in shares)	30,343,421	29,421,131
Percentage of EEH units held by Earthstone and Lynden	46.40%	45.50%
Earthstone Energy Holdings, LLC | EEH Units Held By Earthstone and Lynden US | Class A Common Stock
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
EEH units issued in connection with the vesting of restricted stock units and issuance of class A common stock (in shares)	670,981
Class B common stock converted to class A common stock (in shares)	(251,309)
Earthstone Energy Holdings, LLC | EEH Units Held By Others
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
December 31, 2018 (in shares)	35,260,680
December 31, 2019 (in shares)	35,009,371	35,260,680
Percentage of EEH units held by others	53.60%	54.50%
Earthstone Energy Holdings, LLC | EEH Units Held By Others | Class A Common Stock
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
EEH units issued in connection with the vesting of restricted stock units and issuance of class A common stock (in shares)	0
Class B common stock converted to class A common stock (in shares)	(251,309)