Condensed Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Total	Class A Common Stock	Class B Common Stock	Restricted Stock Units	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Common Stock Restricted Stock Units Class A Common Stock	Additional Paid-in Capital	Additional Paid-in Capital Restricted Stock Units	Accumulated Deficit	Total Earthstone Energy, Inc. Equity	Total Earthstone Energy, Inc. Equity Restricted Stock Units	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2019					29,421,131	35,260,680
Beginning balance at Dec. 31, 2019	$ 835,751				$ 29	$ 35		$ 527,246		$ (181,711)	$ 345,599		$ 490,152
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	2,694							2,694			2,694
Vesting of restricted stock units, net of taxes paid (in shares)		231,834
Vested restricted stock units retained by the Company in exchange for payment of recipient mandatory tax withholdings (in shares)							75,695
Vested restricted stock units retained by the Company in exchange for payment of recipient mandatory tax withholdings				$ (214)					$ (214)			$ (214)
Cancellation of treasury shares (in shares)					(75,695)
Class B Common Stock converted to Class A Common Stock (in shares)			199,993		199,993	(199,993)
Class B Common Stock converted to Class A Common Stock	0							2,897			2,897		(2,897)
Net loss	36,714									16,708	16,708		20,006
Ending balance (in shares) at Mar. 31, 2020					29,852,958	35,060,687
Ending balance at Mar. 31, 2020	874,946				$ 30	$ 35		532,623		(165,003)	367,685		507,261
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted stock units, net of taxes paid	1				$ 1						1
Beginning balance (in shares) at Dec. 31, 2020					30,343,421	35,009,371
Beginning balance at Dec. 31, 2020	815,536				$ 30	$ 35		540,074		(195,258)	344,881		470,655
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	2,605							2,605			2,605
Stock Issued During Period, Value, Acquisitions	76,572				$ 13			76,559			76,572
Vesting of restricted stock units, net of taxes paid (in shares)							463,495
Vested restricted stock units retained by the Company in exchange for payment of recipient mandatory tax withholdings (in shares)					257,764
Vested restricted stock units retained by the Company in exchange for payment of recipient mandatory tax withholdings	(2,080)							(2,080)			(2,080)
Cancellation of treasury shares (in shares)					(257,764)
Class B Common Stock converted to Class A Common Stock (in shares)			578,031		578,031	(578,031)
Class B Common Stock converted to Class A Common Stock	0				$ 1	$ (1)		7,758			7,758		(7,758)
Net loss	(10,556)									(5,833)	(5,833)		(4,723)
Ending balance (in shares) at Mar. 31, 2021					44,104,541	34,431,340
Ending balance at Mar. 31, 2021	$ 882,077				$ 44	$ 34		$ 624,916		$ (201,091)	$ 423,903		$ 458,174
Increase (Decrease) in Stockholders' Equity [Roll Forward]
EEH Units issued in connect with the IRM Acquisition (in shares)					12,719,594