XML 76 R47.htm IDEA: XBRL DOCUMENT
v3.21.2

Organization and Basis of Preparation (Details) | Jun. 30, 2021 well
--- | ---
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Number of wells with overriding royalty interest | 2

X
- Definition Number Of Wells With Overriding Royalty Interest + References No definition available. + Details
Name: | epm_NumberOfWellsWithOverridingRoyaltyInterest
Namespace Prefix: | epm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration