Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Line Items]
Tax Act, provisional income tax expense		$ 7,800
Income tax benefit	$ 302		$ 9,914	$ 53	$ 9,952
Tax Act, discrete income tax benefit, refundable AMT tax credit				500
Deferred income tax expense (benefit)				(54)	(9,952)
Earthstone Energy Holdings, LLC
Income Tax Disclosure [Line Items]
Income tax expense (benefit)				900
Deferred income tax expense (benefit)				200	500
Lynden US
Income Tax Disclosure [Line Items]
Income tax expense (benefit)				$ 200	(2,900)
Bold Transaction | Earthstone Energy Holdings, LLC
Income Tax Disclosure [Line Items]
Income tax expense (benefit)					$ (7,500)