Net Income (Loss) Per Common Share - Reconciliation of Net Loss Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income (loss) attributable to Earthstone Energy, Inc.	$ 39,770	$ 10,418	$ (8,871)	$ (5,833)	$ (8,471)	$ (5,445)	$ (16,339)	$ 16,708	$ (2,624)	$ 11,770	$ 8,777	$ (17,204)	$ 35,484	$ (13,547)	$ 719
Net income (loss) per common share attributable to Earthstone Energy, Inc.:
Basic (in dollars per share)	$ 0.76	$ 0.21	$ (0.20)	$ (0.14)	$ (0.28)	$ (0.18)	$ (0.55)	$ 0.57	$ (0.09)	$ 0.41	$ 0.30	$ 0.60	$ 0.75	$ (0.45)	$ 0.02
Diluted (in dollars per share)	$ 0.72	$ 0.20	$ (0.20)	$ (0.14)	$ (0.28)	$ (0.18)	$ (0.55)	$ 0.57	$ (0.09)	$ 0.41	$ 0.30	$ 0.60	$ 0.71	$ (0.45)	$ 0.02
Weighted average common shares outstanding
Basic (in shares)													47,169,948	29,911,625	28,983,354
Add potentially dilutive securities:
Unvested restricted stock units (in shares)													539,803	0	0
Unvested performance units (in shares)													2,242,342	0	377,531
Diluted weighted average common shares outstanding (in shares)													49,952,093	29,911,625	29,360,885