Net Income (Loss) Per Common Share - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net income (loss) attributable to noncontrolling interest	$ 822,000	$ (37,844,000)	$ 7,692,000	$ (37,844,000)
Dilutive effect on Net income (loss) per common share attributable to Earthstone Energy, Inc			$ 0