Common Stock	3 Months Ended
Mar. 31, 2019
Equity [Abstract]
Common Stock	Common Stock Class A Common Stock At March 31, 2019 and December 31, 2018, there were 28,862,461 and 28,696,321 shares of Class A Common Stock issued and outstanding, respectively. During the three months ended March 31, 2019, as a result of the vesting and settlement of restricted stock units under the Earthstone Energy, Inc. Amended and Restated 2014 Long-Term Incentive Plan (the "2014 Plan"), Earthstone issued 225,401 shares of Class A Common Stock, of which 59,261 shares of Class A Common Stock were retained as treasury stock and canceled to satisfy the related employee income tax liability. During the three months ended March 31, 2018, as a result of the vesting and settlement of restricted stock units under the 2014 Plan, Earthstone issued 114,936 shares of Class A Common Stock of which 28,664 shares of Class A Common Stock were retained as treasury stock and canceled to satisfy the related employee income tax liability. Class B Common Stock At March 31, 2019 and December 31, 2018, there were 35,452,178 shares of Class B Common Stock issued and outstanding, respectively. Each share of Class B Common Stock, together with one EEH Unit, is convertible into one share of Class A Common Stock. During the three months ended March 31, 2019, no shares of Class B Common Stock and EEH Units were exchanged for an equal number of shares of Class A Common Stock. During the three months ended March 31, 2018, 194,046 shares of Class B Common Stock and EEH Units were exchanged for an equal number of shares of Class A Common Stock.

Common Stock

Class A Common Stock

At March 31, 2019 and December 31, 2018, there were 28,862,461 and 28,696,321 shares of Class A Common Stock issued and outstanding, respectively. During the three months ended March 31, 2019, as a result of the vesting and settlement of restricted stock units under the Earthstone Energy, Inc. Amended and Restated 2014 Long-Term Incentive Plan (the "2014 Plan"), Earthstone issued 225,401 shares of Class A Common Stock, of which 59,261 shares of Class A Common Stock were retained as treasury stock and canceled to satisfy the related employee income tax liability. During the three months ended March 31, 2018, as a result of the vesting and settlement of restricted stock units under the 2014 Plan, Earthstone issued 114,936 shares of Class A Common Stock of which 28,664 shares of Class A Common Stock were retained as treasury stock and canceled to satisfy the related employee income tax liability.

Class B Common Stock

At March 31, 2019 and December 31, 2018, there were 35,452,178 shares of Class B Common Stock issued and outstanding, respectively. Each share of Class B Common Stock, together with one EEH Unit, is convertible into one share of Class A Common Stock. During the three months ended March 31, 2019, no shares of Class B Common Stock and EEH Units were exchanged for an equal number of shares of Class A Common Stock. During the three months ended March 31, 2018, 194,046 shares of Class B Common Stock and EEH Units were exchanged for an equal number of shares of Class A Common Stock.