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REVENUE - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Jun. 20, 2026
Disaggregation of Revenue [Line Items]          
Income taxes paid in-kind with crude oil   $ 33,714 $ 37,469 $ 32,776  
CI-705 Block          
Disaggregation of Revenue [Line Items]          
Percentage of working interest 70.00%        
Percentage of paying interest 100.00%        
Cote d'Ivoire          
Disaggregation of Revenue [Line Items]          
Working interest in deepwater producing, percentage   27.39%      
Egyptian General Petroleum Corporation          
Disaggregation of Revenue [Line Items]          
Ownership percentage   50.00%      
Egyptian General Petroleum Corporation (EGPC), South          
Disaggregation of Revenue [Line Items]          
Ownership percentage   50.00%      
Production Sharing Contract | Foreign Tax Jurisdiction | Tax Administration of Gabon          
Disaggregation of Revenue [Line Items]          
Income taxes paid in-kind with crude oil   $ 31,800 30,300    
Foreign income tax payable   $ 18,800 $ 40,000    
Production Sharing Contract | Vaalco Energy Inc. and Other Etame Marin Block Owners          
Disaggregation of Revenue [Line Items]          
Working interest ownership, percentage   7.50%      
Production Sharing Contract | Vaalco Energy Inc. and Other Etame Marin Block Owners | Forecast          
Disaggregation of Revenue [Line Items]          
Working interest ownership, percentage         10.00%
Production Sharing Contract | Government of Gabon          
Disaggregation of Revenue [Line Items]          
Monthly royalty rate   13.00%