| Standard label: | Increase (Decrease) in Production Participation Plan Liability |
| Name: | us-gaap:IncreaseDecreaseInProductionParticipationPlanLiability |
| Documentation: | The increase (decrease) during the reporting period in obligations arising from employee benefits that are based on cash flows generated by interests in oil and gas properties acquired or developed during the year. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:IncreaseDecreaseInProductionParticipationPlanLiability |
| Label | Role | Language |
| Increase (Decrease) in Production Participation Plan Liability | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 230 10 45 28 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 230 |
| Part Of Roll Up: |
| us-gaap:IncreaseDecreaseInOperatingLiabilities |