Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Line Items]
Accrued income taxes, current	$ 600		$ 600		$ 600
Income tax expense (benefit)	$ 451	$ 130	(343)	$ 112
Deferred income tax expense (benefit)			(343)	112
Lynden US
Income Tax Disclosure [Line Items]
Deferred income tax expense (benefit)			(100)
Earthstone Energy Holdings, LLC
Income Tax Disclosure [Line Items]
Income tax expense (benefit)			(800)
Deferred income tax expense (benefit)				(800)
Earthstone Energy Holdings, LLC | Texas Margin Tax
Income Tax Disclosure [Line Items]
Deferred income tax expense (benefit)			(800)	$ 100
Current income tax expense (benefit)			$ 600