v3.26.1
Business Segment Information - Schedule of Business Segment Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]              
Oil and gas revenue $ 607,253   $ 392,635   $ 977,981 $ 682,770  
Gain on sale of assets 9,421   600   9,421 600  
Other income, net 361   283   530 579  
Total revenues and other income 617,035   393,518   987,932 683,949  
Oil and gas production 179,429   243,118   310,024 410,426  
Exploration expenses 3,197   4,069   22,941 13,738  
General and administrative 19,263   19,074   46,973 45,329  
Depletion, depreciation and amortization 120,501   151,268   240,374 271,935  
Interest and other financing costs, net 53,700   54,834   112,502 106,676  
Derivatives, net (51,809)   (21,566)   200,187 (14,834)  
Other expenses, net 10,281   6,481   13,545 8,470  
Total costs and expenses 334,562   457,278   946,546 841,740  
Income (loss) before income taxes 282,473   (63,760)   41,386 (157,791)  
Income tax expense (benefit) 97,698   23,980   82,185 40,555  
Net income (loss) 184,775 $ (225,574) (87,740) $ (110,606) (40,799) (198,346)  
Consolidated capital expenditures, net 105,052   86,107   196,532 172,295  
Property and equipment, net 3,351,526   4,357,812   3,351,526 4,357,812 $ 3,733,784
Total assets 4,310,147   5,213,006   4,310,147 5,213,006 $ 4,696,626
Operating Segments | Ghana              
Segment Reporting [Line Items]              
Oil and gas revenue 356,595   204,706   557,859 355,959  
Gain on sale of assets 0   0   0 0  
Other income, net 361   246   530 498  
Total revenues and other income 356,956   204,952   558,389 356,457  
Oil and gas production 59,031   95,357   87,455 136,668  
Exploration expenses (3)   24   0 70  
General and administrative 3,227   2,904   7,167 6,189  
Depletion, depreciation and amortization 54,075   43,624   107,592 88,440  
Interest and other financing costs, net 10,803   13,242   22,566 24,384  
Derivatives, net 0   0   0 0  
Other expenses, net (21,970)   (11,084)   132,978 (5,888)  
Total costs and expenses 105,163   144,067   357,758 249,863  
Income (loss) before income taxes 251,793   60,885   200,631 106,594  
Income tax expense (benefit) 91,498   21,993   73,950 38,669  
Net income (loss) 160,295   38,892   126,681 67,925  
Consolidated capital expenditures, net 70,494   37,738   140,105 56,696  
Property and equipment, net 1,001,641   961,336   1,001,641 961,336  
Total assets 3,429,540   3,644,403   3,429,540 3,644,403  
Operating Segments | Equatorial Guinea              
Segment Reporting [Line Items]              
Oil and gas revenue 47,161   64,590   69,556 98,997  
Gain on sale of assets 9,421   0   9,421 0  
Other income, net 0   0   0 0  
Total revenues and other income 56,582   64,590   78,977 98,997  
Oil and gas production 25,244   39,957   40,097 56,935  
Exploration expenses 146   (892)   1,260 1,469  
General and administrative 1,003   1,150   2,468 2,970  
Depletion, depreciation and amortization 2,611   27,468   6,732 42,568  
Interest and other financing costs, net (22)   (62)   (57) (129)  
Derivatives, net 0   0   0 0  
Other expenses, net (226)   (6,842)   67,842 (5,317)  
Total costs and expenses 28,756   60,779   118,342 98,496  
Income (loss) before income taxes 27,826   3,811   (39,365) 501  
Income tax expense (benefit) 5,093   1,493   5,743 892  
Net income (loss) 22,733   2,318   (45,108) (391)  
Consolidated capital expenditures, net 2,090   3,914   2,599 2,557  
Property and equipment, net 13,999   446,405   13,999 446,405  
Total assets 132,939   2,458,795   132,939 2,458,795  
Operating Segments | Mauritania/Senegal              
Segment Reporting [Line Items]              
Oil and gas revenue 92,058   20,239   144,325 22,936  
Gain on sale of assets 0   0   0 0  
Other income, net 0   0   0 0  
Total revenues and other income 92,058   20,239   144,325 22,936  
Oil and gas production 65,827   69,141   121,168 127,242  
Exploration expenses 238   2,119   574 3,737  
General and administrative 2,710   2,575   5,420 5,103  
Depletion, depreciation and amortization 35,221   12,677   66,017 15,595  
Interest and other financing costs, net 8,379   5,416   13,960 4,402  
Derivatives, net 0   0   0 0  
Other expenses, net 1,352   433   2,077 1,147  
Total costs and expenses 113,727   92,361   209,216 157,226  
Income (loss) before income taxes (21,669)   (72,122)   (64,891) (134,290)  
Income tax expense (benefit) 9   0   9 0  
Net income (loss) (21,678)   (72,122)   (64,900) (134,290)  
Consolidated capital expenditures, net 3,216   13,105   5,266 62,118  
Property and equipment, net 1,846,885   2,106,488   1,846,885 2,106,488  
Total assets 6,326,648   3,352,428   6,326,648 3,352,428  
Operating Segments | Gulf of America              
Segment Reporting [Line Items]              
Oil and gas revenue 111,439   103,100   206,241 204,878  
Gain on sale of assets 0   600   0 600  
Other income, net 46   219   103 708  
Total revenues and other income 111,485   103,919   206,344 206,186  
Oil and gas production 29,327   38,663   61,304 89,581  
Exploration expenses 2,653   2,649   6,667 7,145  
General and administrative 4,886   3,269   10,690 8,453  
Depletion, depreciation and amortization 27,740   67,364   59,026 125,039  
Interest and other financing costs, net 1,320   (2,141)   3,694 (4,161)  
Derivatives, net 0   0   0 0  
Other expenses, net (4,662)   1,915   25,829 3,262  
Total costs and expenses 61,264   111,719   167,210 229,319  
Income (loss) before income taxes 50,221   (7,800)   39,134 (23,133)  
Income tax expense (benefit) 70   97   71 (14)  
Net income (loss) 50,151   (7,897)   39,063 (23,119)  
Consolidated capital expenditures, net 28,382   31,181   46,907 49,513  
Property and equipment, net 487,042   827,437   487,042 827,437  
Total assets 3,884,596   4,112,600   3,884,596 4,112,600  
Corporate & Other              
Segment Reporting [Line Items]              
Oil and gas revenue 0   0   0 0  
Gain on sale of assets 0   0   0 0  
Other income, net 131   13,880   291,492 60,671  
Total revenues and other income 131   13,880   291,492 60,671  
Oil and gas production 0   0   0 0  
Exploration expenses 163   169   14,440 1,317  
General and administrative 41,984   44,804   95,198 98,746  
Depletion, depreciation and amortization 854   135   1,007 293  
Interest and other financing costs, net 33,220   38,379   72,339 82,180  
Derivatives, net (51,809)   (21,566)   200,187 (14,834)  
Other expenses, net 1,417   493   2,444 432  
Total costs and expenses 25,829   62,414   385,615 168,134  
Income (loss) before income taxes (25,698)   (48,534)   (94,123) (107,463)  
Income tax expense (benefit) 1,028   397   2,412 1,008  
Net income (loss) (26,726)   (48,931)   (96,535) (108,471)  
Consolidated capital expenditures, net 870   169   1,655 1,411  
Property and equipment, net 1,959   16,146   1,959 16,146  
Total assets 29,688,971   25,932,829   29,688,971 25,932,829  
Eliminations              
Segment Reporting [Line Items]              
Oil and gas revenue 0   0   0 0  
Gain on sale of assets 0   0   0 0  
Other income, net (177)   (14,062)   (291,595) (61,298)  
Total revenues and other income (177)   (14,062)   (291,595) (61,298)  
Oil and gas production 0   0   0 0  
Exploration expenses 0   0   0 0  
General and administrative (34,547)   (35,628)   (73,970) (76,132)  
Depletion, depreciation and amortization 0   0   0 0  
Interest and other financing costs, net 0   0   0 0  
Derivatives, net 0   0   0 0  
Other expenses, net 34,370   21,566   (217,625) 14,834  
Total costs and expenses (177)   (14,062)   (291,595) (61,298)  
Income (loss) before income taxes 0   0   0 0  
Income tax expense (benefit) 0   0   0 0  
Net income (loss) 0   0   0 0  
Consolidated capital expenditures, net 0   0   0 0  
Property and equipment, net 0   0   0 0  
Total assets $ (39,152,547)   $ (34,288,049)   $ (39,152,547) $ (34,288,049)