| Cover Page - USD ($) | 12 Months Ended | ||
| Dec. 31, 2020 | Mar. 04, 2021 | Jun. 30, 2020 | |
| Document And Entity Information [Line Items] | |||
| Document Type | 10-K/A | ||
| Document Annual Report | true | ||
| Document Period End Date | Dec. 31, 2020 | ||
| Current Fiscal Year End Date | --12-31 | ||
| Document Transition Report | false | ||
| Entity File Number | 001-35049 | ||
| Entity Registrant Name | EARTHSTONE ENERGY, INC. | ||
| Entity Incorporation, State or Country Code | DE | ||
| Entity Tax Identification Number | 84-0592823 | ||
| Entity Address, Address Line One | 1400 Woodloch Forest Drive | ||
| Entity Address, Address Line Two | Suite 300 | ||
| Entity Address, City or Town | The Woodlands | ||
| Entity Address, State or Province | TX | ||
| Entity Address, Postal Zip Code | 77380 | ||
| City Area Code | 281 | ||
| Local Phone Number | 298-4246 | ||
| Title of 12(b) Security | Class A Common Stock, $0.001 par value per share | ||
| Trading Symbol | ESTE | ||
| Security Exchange Name | NYSE | ||
| Entity Well-known Seasoned Issuer | No | ||
| Entity Voluntary Filers | No | ||
| Entity Current Reporting Status | Yes | ||
| Entity Interactive Data Current | Yes | ||
| Entity Filer Category | Accelerated Filer | ||
| Entity Small Business | true | ||
| Entity Emerging Growth Company | false | ||
| ICFR Auditor Attestation Flag | true | ||
| Entity Shell Company | false | ||
| Entity Public Float | $ 64,727,959 | ||
| Amendment Flag | true | ||
| Document Fiscal Year Focus | 2020 | ||
| Document Fiscal Period Focus | FY | ||
| Entity Central Index Key | 0000010254 | ||
| Amendment Description | This Form 10-K/A (this “Amendment”) amends Earthstone Energy, Inc.’s (“Earthstone” and together with our consolidated subsidiaries, the “Company,” “our,” “we,” “us,” or similar terms) Annual Report on Form 10-K for the year ended December 31, 2020 (the “Original 10-K”), which was filed with the Securities and Exchange Commission (the “SEC”) on March 10, 2021. The Company is filing this Amendment for the sole purpose of providing the information required by Items 10 through 14 of Part III of Form 10-K. This information was previously omitted from the Original 10-K in reliance on General Instruction G.(3) to Form 10-K. The reference on the cover page of the Original 10-K to the incorporation by reference to portions of our definitive proxy statement into Part III of the Original 10-K is hereby deleted. | ||
| Class A Common Stock | |||
| Document And Entity Information [Line Items] | |||
| Entity Common Stock, Shares Outstanding | 43,646,391 | ||
| Class B Common Stock | |||
| Document And Entity Information [Line Items] | |||
| Entity Common Stock, Shares Outstanding | 34,443,898 |
