v3.26.3
Business Segment Information - Schedule of Business Segment Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]                  
Oil and gas revenue $ 410,059     $ 310,959     $ 1,388,040 $ 993,729  
Gain (loss) on sale of assets (339)     0     9,082 600  
Other income, net 160     270     690 849  
Total revenues and other income 409,880     311,229     1,397,812 995,178  
Oil and gas production 101,756     147,696     411,780 558,122  
Exploration expenses 4,239     54,948     27,180 68,686  
General and administrative 18,682     12,886     65,655 58,215  
Depletion, depreciation and amortization 112,228     141,514     352,602 413,449  
Interest and other financing costs, net 53,746     57,919     166,248 164,595  
Derivatives, net 133,876     (3,646)     334,063 (18,480)  
Other expenses, net 12,680     6,384     26,225 14,854  
Total costs and expenses 437,207     417,701     1,383,753 1,259,441  
Income (loss) before income taxes (27,327)     (106,472)     14,059 (264,263)  
Income tax expense (benefit) 15,683     17,827     97,868 58,382  
Net loss (43,010) $ 184,775 $ (225,574) (124,299) $ (87,740) $ (110,606) (83,809) (322,645)  
Consolidated capital expenditures, net 84,976     67,336     281,507 239,631  
Property and equipment, net 3,309,462     4,208,535     3,309,462 4,208,535 $ 3,733,784
Total assets 4,263,576     5,089,741     4,263,576 5,089,741 $ 4,696,626
Operating Segments | Ghana                  
Segment Reporting [Line Items]                  
Oil and gas revenue 245,011     141,146     802,870 497,104  
Gain (loss) on sale of assets 0           0 0  
Other income, net 160     269     690 768  
Total revenues and other income 245,171     141,415     803,560 497,872  
Oil and gas production 18,395     22,871     105,850 159,539  
Exploration expenses 0     0     0 70  
General and administrative 3,017     2,771     10,183 8,959  
Depletion, depreciation and amortization 56,489     43,180     164,081 131,620  
Interest and other financing costs, net 9,682     13,723     32,248 38,107  
Derivatives, net 0     0     0 0  
Other expenses, net 115,085     (2,135)     248,063 (8,022)  
Total costs and expenses 202,668     80,410     560,425 330,273  
Income (loss) before income taxes 42,503     61,005     243,135 167,599  
Income tax expense (benefit) 16,087     22,103     90,037 60,772  
Net loss 26,416     38,902     153,098 106,827  
Consolidated capital expenditures, net 64,198     23,561     204,303 80,257  
Property and equipment, net 1,004,236     946,479     1,004,236 946,479  
Total assets 3,563,345     3,341,717     3,563,345 3,341,717  
Operating Segments | Equatorial Guinea                  
Segment Reporting [Line Items]                  
Oil and gas revenue 0     41,777     69,556 140,774  
Gain (loss) on sale of assets (339)           9,082 0  
Other income, net 0     0     0 0  
Total revenues and other income (339)     41,777     78,638 140,774  
Oil and gas production (103)     33,700     39,994 90,635  
Exploration expenses 215     (211)     1,475 1,258  
General and administrative 908     816     3,376 3,787  
Depletion, depreciation and amortization 15     19,658     6,747 62,226  
Interest and other financing costs, net 0     (38)     (57) (167)  
Derivatives, net 0     0     0 0  
Other expenses, net 1,279     6,132     69,120 815  
Total costs and expenses 2,314     60,057     120,655 158,554  
Income (loss) before income taxes (2,653)     (18,280)     (42,017) (17,780)  
Income tax expense (benefit) 0     (3,933)     5,743 (3,042)  
Net loss (2,653)     (14,347)     (47,760) (14,738)  
Consolidated capital expenditures, net 147     6,099     2,746 8,657  
Property and equipment, net 13,579     435,986     13,579 435,986  
Total assets 131,346     2,477,126     131,346 2,477,126  
Operating Segments | Mauritania/Senegal                  
Segment Reporting [Line Items]                  
Oil and gas revenue 66,394     39,343     210,719 62,279  
Gain (loss) on sale of assets 0           0 0  
Other income, net 0     0     0 0  
Total revenues and other income 66,394     39,343     210,719 62,279  
Oil and gas production 56,054     59,401     177,222 186,643  
Exploration expenses 252     1,944     826 5,681  
General and administrative 2,713     1,930     8,133 7,033  
Depletion, depreciation and amortization 27,659     21,728     93,676 37,322  
Interest and other financing costs, net 5,981     5,814     19,941 10,216  
Derivatives, net 0     0     0 0  
Other expenses, net 2,536     421     4,613 1,569  
Total costs and expenses 95,195     91,238     304,411 248,464  
Income (loss) before income taxes (28,801)     (51,895)     (93,692) (186,185)  
Income tax expense (benefit) 0     0     9 0  
Net loss (28,801)     (51,895)     (93,701) (186,185)  
Consolidated capital expenditures, net 1,761     6,761     7,028 68,879  
Property and equipment, net 1,821,158     2,092,629     1,821,158 2,092,629  
Total assets 6,199,248     3,405,756     6,199,248 3,405,756  
Operating Segments | Gulf of America                  
Segment Reporting [Line Items]                  
Oil and gas revenue 98,654     88,693     304,895 293,572  
Gain (loss) on sale of assets 0           0 600  
Other income, net 67     19     170 728  
Total revenues and other income 98,721     88,712     305,065 294,900  
Oil and gas production 27,410     31,724     88,714 121,305  
Exploration expenses 3,423     53,134     10,090 60,279  
General and administrative 2,688     1,480     13,378 9,933  
Depletion, depreciation and amortization 28,174     56,812     87,200 181,851  
Interest and other financing costs, net 1,505     (2,187)     5,198 (6,348)  
Derivatives, net 0     0     0 0  
Other expenses, net 27,680     (1,821)     53,509 1,442  
Total costs and expenses 90,880     139,142     258,089 368,462  
Income (loss) before income taxes 7,841     (50,430)     46,976 (73,562)  
Income tax expense (benefit) 0     0     71 (14)  
Net loss 7,841     (50,430)     46,905 (73,548)  
Consolidated capital expenditures, net 18,245     30,026     65,152 79,539  
Property and equipment, net 468,516     716,712     468,516 716,712  
Total assets 4,024,380     2,714,156     4,024,380 2,714,156  
Corporate & Other                  
Segment Reporting [Line Items]                  
Oil and gas revenue 0     0     0 0  
Gain (loss) on sale of assets 0           0 0  
Other income, net 163,022     8,683     454,514 69,352  
Total revenues and other income 163,022     8,683     454,514 69,352  
Oil and gas production 0     0     0 0  
Exploration expenses 349     81     14,789 1,398  
General and administrative 38,569     18,237     133,768 116,983  
Depletion, depreciation and amortization (109)     136     898 430  
Interest and other financing costs, net 36,578     40,607     108,918 122,787  
Derivatives, net 133,876     (3,646)     334,063 (18,480)  
Other expenses, net (24)     141     2,421 570  
Total costs and expenses 209,239     55,556     594,857 223,688  
Income (loss) before income taxes (46,217)     (46,873)     (140,343) (154,336)  
Income tax expense (benefit) (404)     (343)     2,008 666  
Net loss (45,813)     (46,530)     (142,351) (155,002)  
Consolidated capital expenditures, net 625     889     2,278 2,299  
Property and equipment, net 1,973     16,729     1,973 16,729  
Total assets 29,961,292     26,831,583     29,961,292 26,831,583  
Eliminations                  
Segment Reporting [Line Items]                  
Oil and gas revenue 0     0     0 0  
Gain (loss) on sale of assets 0           0 0  
Other income, net (163,089)     (8,701)     (454,684) (69,999)  
Total revenues and other income (163,089)     (8,701)     (454,684) (69,999)  
Oil and gas production 0     0     0 0  
Exploration expenses 0     0     0 0  
General and administrative (29,213)     (12,348)     (103,183) (88,480)  
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 (133,876)     3,646     (351,501) 18,480  
Total costs and expenses (163,089)     (8,702)     (454,684) (70,000)  
Income (loss) before income taxes 0     1     0 1  
Income tax expense (benefit) 0     0     0 0  
Net loss 0     1     0 1  
Consolidated capital expenditures, net 0     0     0 0  
Property and equipment, net 0     0     0 0  
Total assets $ (39,616,035)     $ (33,680,597)     $ (39,616,035) $ (33,680,597)