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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%