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Additional Financial Statement Information (Details) $ in Thousands | Jun. 30, 2022 USD ($)
--- | ---
Schedule of Equity Method Investments [Line Items] |
Receivables related to customary purchase adjustments | $ 2,263
Jonah Field Acquisition |
Schedule of Equity Method Investments [Line Items] |
Receivables related to customary purchase adjustments | 1,600
Williston Basin Acquisition |
Schedule of Equity Method Investments [Line Items] |
Receivables related to customary purchase adjustments | $ 700

X
- Definition Amount of acquisition settlement proceeds receivable within a future period of one year or the normal operating cycle, if longer. + References No definition available. + Details
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Namespace Prefix: | epm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=epm_WillistonBasinAcquisitionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |