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Acquisitions and Divestitures - Acquisitions - Business Combinations - Additional Information (Details) - USD ($) $ in Thousands |  |  |  |  | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 01, 2026 | Jul. 22, 2026 | Jul. 15, 2026 | Mar. 07, 2025 | Jun. 30, 2026 | Jul. 29, 2026 | Jul. 13, 2026 | Dec. 31, 2025
Business Combination [Line Items] |  |  |  |  |  |  |  |
Divestiture, Description |  |  |  |  | Subsequent Event — On July 15, 2026, the Company divested a wholly-owned subsidiary holding non-core, gas-weighted and predominantly non-operated Shelf and Gulf Coast properties pursuant to a purchase and sale agreement. The total consideration received for the transaction was approximately $22.6 million, inclusive of liabilities divested and $31.5 million cash paid to the buyer. |  |  |
Asset retirement obligations liabilities |  |  |  |  | $ 1,394,145 |  |  | $ 1,332,128
Subsequent Events |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Total consideration |  |  | $ 22,600 |  |  |  |  |
Cash paid |  |  | $ 31,500 |  |  |  |  |
8.000% Second-Priority Senior Secured Notes due July 2034 | Senior Notes |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Debt instrument interest rate |  |  |  |  |  |  | 8.00% |
8.000% Second-Priority Senior Secured Notes due July 2034 | Senior Notes | Subsequent Events |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Debt instrument interest rate |  |  |  |  |  |  | 8.00% |
Monument Oil Discovery |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Asset acquisition, date of acquisition agreement |  |  |  | Mar. 07, 2025 |  |  |  |
Percentage of non-operated working interest acquired |  |  |  | 8.30% |  |  |  |
Total non operated working interest percentage |  |  |  |  | 29.70% |  |  |
Cash consideration |  |  |  | $ 14,800 |  |  |  |
Monument Oil Discovery | Milestone Payment [Member] |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Cash consideration |  |  |  |  | $ 3,200 |  |  |
Coulomb Field | Pro Forma |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Percentage of working interest and operatorship interest acquired |  |  |  |  | 50.00% |  |  |
Na Kika | Pro Forma |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Percentage of working interest acquired |  |  |  |  | 25.00% |  |  |
PSA Assets | Pro Forma |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Percentage of working interest acquired |  |  |  |  | 50.00% |  |  |
Shell Acquisition |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Unadjusted cash purchase price |  |  |  |  | $ 850,000 |  |  |
Escrow deposit |  |  |  |  | $ 42,500 |  |  |
Shell Acquisition | Forecast | Minimum |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Cash consideration | $ 407,500 |  |  |  |  |  |  |
Shell Acquisition | Forecast | Maximum |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Cash consideration | $ 457,500 |  |  |  |  |  |  |
Shell Acquisition | Pro Forma |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Percentage of price based sharing arrangement of oil volumes |  |  |  |  | 100.00% |  |  |
Percentage of overriding royalty interest granted |  |  |  |  | 1.25% |  |  |
Shell Acquisition | Production Handling Agreement | Maximum |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Cash consideration |  |  |  |  | $ 10,000 |  |  |
Block 29 | Subsequent Events |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Percentage of working interest acquired |  | 50.00% |  |  |  |  |  |
Block 29 | Final Investment Decision Trigger | Subsequent Events |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Cash consideration |  | $ 30,000 |  |  |  |  |  |
Block 29 | Exploration Well Cash Carry | Subsequent Events |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Cash carry on next exploration |  | $ 20,000 |  |  |  |  |  |
Honduras | Subsequent Events |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |
Percentage of working interest acquired |  |  |  |  |  | 80.00% |  |
Percentage of acquisition of remaining working interest |  |  |  |  |  | 35.00% |  |
Percentage of working interest closed |  |  |  |  |  | 45.00% |  |

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