v3.26.3
Business Segments - Schedule of Segment Information (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]          
Revenue from production $ 849,175,000 $ 720,966,000 $ 2,507,861,000 $ 2,076,761,000  
Gain on sale of assets and other operating income 5,700,000 12,200,000 8,900,000 19,900,000  
Total revenues and other income 854,900,000 733,200,000 2,516,800,000 2,096,700,000  
Lease operating expenses          
Lease operating expenses and taxes other than income 129,300,000 137,200,000 368,000,000.0 430,600,000  
Repair and maintenance 23,200,000 15,300,000 54,700,000 42,000,000.0  
Workovers   31,900,000 13,700,000 132,400,000  
Workovers (3,300,000)        
Total lease operating expenses 149,174,000 184,353,000 436,357,000 604,986,000  
Severance and ad valorem taxes 13,561,000 12,288,000 42,298,000 31,766,000  
Transportation, gathering and processing 47,045,000 48,146,000 139,380,000 151,067,000  
Selling and general expenses 40,600,000 30,900,000 114,100,000 98,700,000  
Exploration Expenses          
Geological and geophysical 17,600,000 20,300,000 30,400,000 24,700,000  
Dry holes and previously suspended exploration costs 6,100,000 800,000 86,700,000 100,000  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 9,400,000 11,400,000 38,100,000 32,600,000  
Total exploration expenses 33,111,000 32,502,000 155,229,000 57,389,000  
Depreciation, depletion and amortization 271,400,000 283,500,000 787,900,000 736,900,000  
Impairment of assets 0 115,002,000 0 115,002,000  
Accretion of asset retirement obligations 15,056,000 14,676,000 44,440,000 43,153,000  
Other operating expenses 28,600,000 5,900,000 47,700,000 13,400,000  
Interest Income (2,900,000) (3,100,000) (8,300,000) (10,000,000.0)  
Interest expense, net of capitalization 24,199,000 24,726,000 78,093,000 73,302,000  
Income tax expense          
Current income tax expense (3,600,000) 2,100,000 30,900,000 14,600,000  
Deferred income tax expense (benefit) 42,900,000 2,100,000 135,400,000 23,300,000  
Total income tax expense (benefit) 39,300,000 4,200,000 166,300,000 37,900,000  
Other segment costs (income) 200,000 (11,600,000) (14,400,000) 26,800,000  
Net income (loss) including noncontrolling interest 195,534,000 (8,316,000) 527,718,000 116,226,000  
Additions to property, plant, equipment 415,900,000 181,000,000.0 1,276,800,000 817,000,000.0  
Total assets at quarter-end 10,481,366,000 9,732,800,000 10,481,366,000 9,732,800,000 $ 9,832,626,000
Maximum          
Lease operating expenses          
Transportation, gathering and processing 47,100,000        
Minimum          
Exploration Expenses          
Accretion of asset retirement obligations 15,000,000.0        
Revenue from production          
Segment Reporting [Line Items]          
Revenue from production 849,200,000 721,000,000.0 2,507,900,000 2,076,800,000  
Operating Segments          
Segment Reporting [Line Items]          
Gain on sale of assets and other operating income 2,000,000.0 800,000 4,500,000 4,900,000  
Total revenues and other income 851,200,000 721,800,000 2,512,400,000 2,081,700,000  
Lease operating expenses          
Lease operating expenses and taxes other than income 129,300,000 137,200,000 368,000,000.0 430,600,000  
Repair and maintenance 23,200,000 15,300,000 54,700,000 42,000,000.0  
Workovers   31,900,000 13,700,000 132,400,000  
Workovers (3,300,000)        
Total lease operating expenses 149,200,000 184,400,000 436,400,000 605,000,000.0  
Severance and ad valorem taxes 13,600,000 12,300,000 42,300,000 31,800,000  
Transportation, gathering and processing 47,100,000 48,100,000 139,400,000 151,100,000  
Selling and general expenses 17,800,000 9,500,000 50,100,000 32,500,000  
Exploration Expenses          
Geological and geophysical 17,600,000 20,300,000 30,400,000 24,700,000  
Dry holes and previously suspended exploration costs 6,100,000 800,000 86,700,000 100,000  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 9,400,000 11,400,000 38,100,000 32,600,000  
Total exploration expenses 33,100,000 32,500,000 155,200,000 57,400,000  
Depreciation, depletion and amortization 268,800,000 281,400,000 780,500,000 730,700,000  
Impairment of assets   115,000,000.0   115,000,000.0  
Accretion of asset retirement obligations 15,000,000.0 14,600,000 44,200,000 43,100,000  
Other operating expenses 28,700,000 6,000,000.0 49,800,000 10,400,000  
Interest Income (700,000) (400,000) (1,500,000) (1,300,000)  
Interest expense, net of capitalization 200,000 100,000 500,000 200,000  
Income tax expense          
Current income tax expense (1,700,000) (700,000) 25,700,000 14,700,000  
Deferred income tax expense (benefit) 51,100,000 7,300,000 156,000,000.0 48,700,000  
Total income tax expense (benefit) 49,400,000 6,600,000 181,700,000 63,400,000  
Other segment costs (income) 1,800,000 900,000 5,000,000.0 3,700,000  
Net income (loss) including noncontrolling interest 227,200,000 10,800,000 628,800,000 238,700,000  
Additions to property, plant, equipment 405,100,000 178,700,000 1,249,600,000 807,800,000  
Total assets at quarter-end 9,887,200,000 9,241,700,000 9,887,200,000 9,241,700,000  
Operating Segments | United States          
Segment Reporting [Line Items]          
Gain on sale of assets and other operating income 1,500,000 300,000 3,300,000 3,600,000  
Total revenues and other income 681,700,000 613,700,000 2,001,200,000 1,676,700,000  
Lease operating expenses          
Lease operating expenses and taxes other than income 86,600,000 95,600,000 237,100,000 295,900,000  
Repair and maintenance 17,800,000 13,900,000 47,900,000 38,000,000.0  
Workovers   31,800,000 5,800,000 131,500,000  
Workovers (4,900,000)        
Total lease operating expenses 99,500,000 141,300,000 290,800,000 465,400,000  
Severance and ad valorem taxes 12,700,000 11,900,000 39,700,000 30,700,000  
Transportation, gathering and processing 23,400,000 23,300,000 73,100,000 82,400,000  
Selling and general expenses 7,700,000 1,900,000 20,800,000 8,700,000  
Exploration Expenses          
Geological and geophysical 2,000,000.0 19,100,000 13,000,000.0 23,000,000.0  
Dry holes and previously suspended exploration costs 900,000 (100,000) 500,000 (900,000)  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 5,300,000 3,500,000 15,200,000 9,800,000  
Total exploration expenses 8,200,000 22,500,000 28,700,000 31,900,000  
Depreciation, depletion and amortization 229,300,000 242,100,000 666,700,000 619,700,000  
Impairment of assets   115,000,000.0   115,000,000.0  
Accretion of asset retirement obligations 12,100,000 11,800,000 35,600,000 34,800,000  
Other operating expenses 11,300,000 5,700,000 31,700,000 9,700,000  
Interest Income (700,000) (400,000) (1,500,000) (1,300,000)  
Interest expense, net of capitalization 100,000 0 300,000 0  
Income tax expense          
Current income tax expense (600,000) 1,000,000.0 2,300,000 2,200,000  
Deferred income tax expense (benefit) 55,500,000 7,900,000 156,900,000 51,600,000  
Total income tax expense (benefit) 54,900,000 8,900,000 159,200,000 53,800,000  
Other segment costs (income) 800,000 800,000 2,800,000 2,600,000  
Net income (loss) including noncontrolling interest 222,400,000 28,900,000 653,300,000 223,300,000  
Additions to property, plant, equipment 219,900,000 111,600,000 737,900,000 586,400,000  
Total assets at quarter-end 6,859,400,000 6,848,100,000 6,859,400,000 6,848,100,000  
Operating Segments | Canada          
Segment Reporting [Line Items]          
Gain on sale of assets and other operating income 500,000 500,000 1,200,000 1,300,000  
Total revenues and other income 169,500,000 108,000,000.0 508,300,000 402,000,000.0  
Lease operating expenses          
Lease operating expenses and taxes other than income 42,600,000 41,200,000 129,700,000 133,100,000  
Repair and maintenance 5,400,000 1,400,000 6,800,000 4,000,000.0  
Workovers   100,000 7,900,000 900,000  
Workovers 1,600,000        
Total lease operating expenses 49,600,000 42,700,000 144,400,000 138,000,000.0  
Severance and ad valorem taxes 900,000 400,000 2,600,000 1,100,000  
Transportation, gathering and processing 23,700,000 24,800,000 66,300,000 68,700,000  
Selling and general expenses 7,500,000 5,400,000 22,000,000.0 17,100,000  
Exploration Expenses          
Geological and geophysical 0 100,000 0 100,000  
Dry holes and previously suspended exploration costs 0 0 0 0  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 0 100,000 0 200,000  
Total exploration expenses 0 200,000 0 300,000  
Depreciation, depletion and amortization 39,400,000 39,300,000 112,600,000 109,800,000  
Impairment of assets   0   0  
Accretion of asset retirement obligations 2,700,000 2,600,000 8,000,000.0 7,700,000  
Other operating expenses 17,100,000 100,000 17,200,000 1,800,000  
Interest Income 0 0 0 0  
Interest expense, net of capitalization 100,000 100,000 100,000 100,000  
Income tax expense          
Current income tax expense (1,000,000.0) (1,700,000) 23,200,000 12,300,000  
Deferred income tax expense (benefit) 8,300,000 (200,000) 6,700,000 (1,800,000)  
Total income tax expense (benefit) 7,300,000 (1,900,000) 29,900,000 10,500,000  
Other segment costs (income) 300,000 400,000 800,000 1,100,000  
Net income (loss) including noncontrolling interest 20,900,000 (6,100,000) 104,400,000 45,800,000  
Additions to property, plant, equipment 21,200,000 26,000,000.0 147,600,000 127,000,000.0  
Total assets at quarter-end 1,951,200,000 1,981,800,000 1,951,200,000 1,981,800,000  
Operating Segments | Other          
Segment Reporting [Line Items]          
Gain on sale of assets and other operating income 0 0 0 0  
Total revenues and other income 0 100,000 2,900,000 3,000,000.0  
Lease operating expenses          
Lease operating expenses and taxes other than income 100,000 400,000 1,200,000 1,600,000  
Repair and maintenance 0 0 0 0  
Workovers   0 0 0  
Workovers 0        
Total lease operating expenses 100,000 400,000 1,200,000 1,600,000  
Severance and ad valorem taxes 0 0 0 0  
Transportation, gathering and processing 0 0 0 0  
Selling and general expenses 2,600,000 2,200,000 7,300,000 6,700,000  
Exploration Expenses          
Geological and geophysical 15,600,000 1,100,000 17,400,000 1,600,000  
Dry holes and previously suspended exploration costs 5,200,000 900,000 86,200,000 1,000,000.0  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 4,100,000 7,800,000 22,900,000 22,600,000  
Total exploration expenses 24,900,000 9,800,000 126,500,000 25,200,000  
Depreciation, depletion and amortization 100,000 0 1,200,000 1,200,000  
Impairment of assets   0   0  
Accretion of asset retirement obligations 200,000 200,000 600,000 600,000  
Other operating expenses 300,000 200,000 900,000 (1,100,000)  
Interest Income 0 0 0 0  
Interest expense, net of capitalization 0 0 100,000 100,000  
Income tax expense          
Current income tax expense (100,000) 0 200,000 200,000  
Deferred income tax expense (benefit) (12,700,000) (400,000) (7,600,000) (1,100,000)  
Total income tax expense (benefit) (12,800,000) (400,000) (7,400,000) (900,000)  
Other segment costs (income) 700,000 (300,000) 1,400,000 0  
Net income (loss) including noncontrolling interest (16,100,000) (12,000,000.0) (128,900,000) (30,400,000)  
Additions to property, plant, equipment 164,000,000.0 41,100,000 364,100,000 94,400,000  
Total assets at quarter-end 1,076,600,000 411,800,000 1,076,600,000 411,800,000  
Operating Segments | Revenue from production          
Segment Reporting [Line Items]          
Revenue from production 849,200,000 721,000,000.0 2,507,900,000 2,076,800,000  
Operating Segments | Revenue from production | United States          
Segment Reporting [Line Items]          
Revenue from production 680,200,000 613,400,000 1,997,900,000 1,673,100,000  
Operating Segments | Revenue from production | Canada          
Segment Reporting [Line Items]          
Revenue from production 169,000,000.0 107,500,000 507,100,000 400,700,000  
Operating Segments | Revenue from production | Other          
Segment Reporting [Line Items]          
Revenue from production 0 100,000 2,900,000 3,000,000.0  
Corporate and Discontinued Operations          
Segment Reporting [Line Items]          
Gain on sale of assets and other operating income 3,700,000 11,400,000 4,400,000 15,000,000.0  
Total revenues and other income 3,700,000 11,400,000 4,400,000 15,000,000.0  
Lease operating expenses          
Lease operating expenses and taxes other than income 0 0 0 0  
Repair and maintenance 0 0 0 0  
Workovers   0 0 0  
Workovers 0        
Total lease operating expenses 0 0 0 0  
Severance and ad valorem taxes 0 0 0 0  
Transportation, gathering and processing 0 0 0 0  
Selling and general expenses 22,800,000 21,400,000 64,000,000.0 66,200,000  
Exploration Expenses          
Geological and geophysical 0 0 0 0  
Dry holes and previously suspended exploration costs 0 0 0 0  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 0 0 0 0  
Total exploration expenses 0 0 0 0  
Depreciation, depletion and amortization 2,600,000 2,100,000 7,400,000 6,200,000  
Impairment of assets   0   0  
Accretion of asset retirement obligations 0 100,000 200,000 100,000  
Other operating expenses (100,000) (100,000) (2,100,000) 3,000,000.0  
Interest Income (2,200,000) (2,700,000) (6,800,000) (8,700,000)  
Interest expense, net of capitalization 24,000,000.0 24,600,000 77,600,000 73,100,000  
Income tax expense          
Current income tax expense (1,900,000) 2,800,000 5,200,000 (100,000)  
Deferred income tax expense (benefit) (8,200,000) (5,200,000) (20,600,000) (25,400,000)  
Total income tax expense (benefit) (10,100,000) (2,400,000) (15,400,000) (25,500,000)  
Other segment costs (income) (1,600,000) (12,500,000) (19,400,000) 23,100,000  
Net income (loss) including noncontrolling interest (31,700,000) (19,100,000) (101,100,000) (122,500,000)  
Additions to property, plant, equipment 10,800,000 2,300,000 27,200,000 9,200,000  
Total assets at quarter-end 594,200,000 491,100,000 594,200,000 491,100,000  
Corporate and Discontinued Operations | Revenue from production          
Segment Reporting [Line Items]          
Revenue from production $ 0 $ 0 $ 0 $ 0