Stock-Based Compensation - TSR Multiplier (Details) - Performance Share Units - Maximum	12 Months Ended
	Dec. 31, 2020
23.9% or greater
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earthstone’s Annualized TSR	200000.00%
14.5%
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earthstone’s Annualized TSR	100000.00%
8.4%
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earthstone’s Annualized TSR	50000.00%
Less than 8.4%
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earthstone’s Annualized TSR	0.00%