Acquisitions and Divestitures - Schedule of Unaudited Pro forma Revenues and Expenses of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Net income (loss)	$ 564	$ 4,008	$ 14,227	$ (50,230)
Bold Transaction
Business Acquisition [Line Items]
Revenue		28,409		91,163
Income (loss) before taxes		3,408		(42,228)
Net income (loss)		3,502		(39,711)
Less: Net income (loss) available to noncontrolling interest		2,142		(24,316)
Net income (loss) attributable to Earthstone Energy, Inc.		$ 1,360		$ (15,395)
Pro forma net loss per common share attributable to Earthstone Energy, Inc.:
Basic (in dollars per share)		$ 0.06		$ (0.68)
Diluted (in dollars per share)		$ 0.06		$ (0.68)