Common Stock	6 Months Ended
Jun. 30, 2019
Equity [Abstract]
Common Stock	Common Stock Class A Common Stock At June 30, 2019 and December 31, 2018, there were 29,031,504 and 28,696,321 shares of Class A Common Stock issued and outstanding, respectively. During the three and six months ended June 30, 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 176,655 and 402,056 shares, respectively, of Class A Common Stock, of which 43,344 and 102,605 shares, respectively, of Class A Common Stock were retained as treasury stock and canceled to satisfy the related employee income tax liability. During the three and six months ended June 30, 2018, as a result of the vesting and settlement of restricted stock units under the 2014 Plan, Earthstone issued 339,075 and 454,011 shares, respectively, of Class A Common Stock, of which 83,762 and 112,426 shares, respectively, 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 June 30, 2019 and December 31, 2018, there were 35,416,446 and 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 and six months ended June 30, 2019, 35,732 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 and six months ended June 30, 2018, 11,195 and 205,241 shares, respectively, 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 June 30, 2019 and December 31, 2018, there were 29,031,504 and 28,696,321 shares of Class A Common Stock issued and outstanding, respectively. During the three and six months ended June 30, 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 176,655 and 402,056 shares, respectively, of Class A Common Stock, of which 43,344 and 102,605 shares, respectively, of Class A Common Stock were retained as treasury stock and canceled to satisfy the related employee income tax liability. During the three and six months ended June 30, 2018, as a result of the vesting and settlement of restricted stock units under the 2014 Plan, Earthstone issued 339,075 and 454,011 shares, respectively, of Class A Common Stock, of which 83,762 and 112,426 shares, respectively, 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 June 30, 2019 and December 31, 2018, there were 35,416,446 and 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 and six months ended June 30, 2019, 35,732 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 and six months ended June 30, 2018, 11,195 and 205,241 shares, respectively, of Class B Common Stock and EEH Units were exchanged for an equal number of shares of Class A Common Stock.