Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Line Items]
Tax Act, provisional income tax expense		$ 7,800
Income tax expense	$ 172		$ (94)	$ 119	$ (10,046)
Tax Act, discrete income tax benefit, refundable AMT tax credit				500
Deferred income tax expense (benefit)				119	(10,046)
Earthstone Energy Holdings, LLC
Income Tax Disclosure [Line Items]
Income tax expense (benefit)				1,100
Deferred income tax expense (benefit)				300	200
Lynden US
Income Tax Disclosure [Line Items]
Income tax expense (benefit)				$ 300	(2,700)
Bold Transaction | Earthstone Energy Holdings, LLC
Income Tax Disclosure [Line Items]
Income tax expense (benefit)					$ (7,500)