v3.26.1
Business Segments - Schedule of Segment Information (Details) - USD ($)
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Segment Reporting Information [Line Items]      
Revenue from production $ 732,354,000 $ 672,730,000  
Gain on sale of assets and other operating income 1,200,000 (7,000,000.0)  
Total revenues and other income 733,600,000 665,700,000  
Lease operating expenses      
Lease operating expenses and taxes other than income 123,400,000 145,900,000  
Repair and maintenance 13,000,000.0 11,800,000  
Workovers 7,100,000 47,400,000  
Total lease operating expenses 143,464,000 205,079,000  
Severance and ad valorem taxes 13,746,000 8,650,000  
Transportation, gathering and processing 47,061,000 48,851,000  
Selling and general expenses 34,900,000 30,900,000  
Exploration Expense [Abstract]      
Geological and geophysical 1,600,000 3,500,000  
Dry holes and previously suspended exploration costs 67,100,000 200,000  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 14,100,000 10,800,000  
Total exploration expenses 82,815,000 14,488,000  
Depreciation, depletion and amortization 254,400,000 194,200,000  
Impairment of assets 0 0  
Accretion of asset retirement obligations 14,514,000 14,045,000  
Other operating expenses 4,400,000 5,600,000  
Interest Income (2,500,000) (3,700,000)  
Interest expense, net of capitalization 28,977,000 23,523,000  
Income tax expense      
Current income tax expense 13,100,000 16,300,000  
Deferred income tax expense (benefit) 36,800,000 16,400,000  
Total income tax expense (benefit) 49,900,000 32,700,000  
Other segment costs (income) (6,800,000) 1,900,000  
Net income including noncontrolling interest 68,653,000 89,418,000  
Additions to property, plant, equipment 397,500,000 412,000,000.0  
Total assets at quarter-end 10,035,634,000 9,820,300,000 $ 9,832,626,000
Revenue from production      
Segment Reporting Information [Line Items]      
Revenue from production 732,354,000 672,730,000  
Operating Segments      
Segment Reporting Information [Line Items]      
Gain on sale of assets and other operating income 1,200,000 2,500,000  
Total revenues and other income 733,600,000 675,200,000  
Lease operating expenses      
Lease operating expenses and taxes other than income 123,400,000 145,900,000  
Repair and maintenance 13,000,000.0 11,800,000  
Workovers 7,100,000 47,400,000  
Total lease operating expenses 143,500,000 205,100,000  
Severance and ad valorem taxes 13,700,000 8,700,000  
Transportation, gathering and processing 47,100,000 48,900,000  
Selling and general expenses 15,100,000 9,900,000  
Exploration Expense [Abstract]      
Geological and geophysical 1,600,000 3,500,000  
Dry holes and previously suspended exploration costs 67,100,000 200,000  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 14,100,000 10,800,000  
Total exploration expenses 82,800,000 14,500,000  
Depreciation, depletion and amortization 252,000,000.0 191,900,000  
Accretion of asset retirement obligations 14,400,000 14,000,000.0  
Other operating expenses 4,400,000 3,600,000  
Interest Income (200,000) (400,000)  
Interest expense, net of capitalization 200,000 0  
Income tax expense      
Current income tax expense 10,900,000 14,200,000  
Deferred income tax expense (benefit) 42,300,000 25,100,000  
Total income tax expense (benefit) 53,200,000 39,300,000  
Other segment costs (income) 1,800,000 1,500,000  
Net income including noncontrolling interest 105,600,000 138,200,000  
Additions to property, plant, equipment 388,200,000 407,800,000  
Total assets at quarter-end 9,557,500,000 9,355,400,000  
Operating Segments | United States      
Segment Reporting Information [Line Items]      
Gain on sale of assets and other operating income 800,000 2,100,000  
Total revenues and other income 575,500,000 509,500,000  
Lease operating expenses      
Lease operating expenses and taxes other than income 80,800,000 100,300,000  
Repair and maintenance 12,300,000 10,200,000  
Workovers 4,700,000 47,100,000  
Total lease operating expenses 97,800,000 157,600,000  
Severance and ad valorem taxes 12,900,000 8,400,000  
Transportation, gathering and processing 25,200,000 28,700,000  
Selling and general expenses 5,500,000 2,000,000.0  
Exploration Expense [Abstract]      
Geological and geophysical 800,000 3,200,000  
Dry holes and previously suspended exploration costs 0 200,000  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 4,900,000 2,700,000  
Total exploration expenses 5,700,000 6,100,000  
Depreciation, depletion and amortization 216,900,000 159,400,000  
Accretion of asset retirement obligations 11,600,000 11,300,000  
Other operating expenses 4,000,000.0 2,600,000  
Interest Income (200,000) (400,000)  
Interest expense, net of capitalization 100,000 0  
Income tax expense      
Current income tax expense 1,000,000.0 500,000  
Deferred income tax expense (benefit) 37,300,000 24,500,000  
Total income tax expense (benefit) 38,300,000 25,000,000.0  
Other segment costs (income) 1,100,000 900,000  
Net income including noncontrolling interest 156,600,000 107,900,000  
Additions to property, plant, equipment 254,800,000 317,100,000  
Total assets at quarter-end 6,916,500,000 7,046,300,000  
Operating Segments | Canada      
Segment Reporting Information [Line Items]      
Gain on sale of assets and other operating income 400,000 400,000  
Total revenues and other income 155,200,000 165,700,000  
Lease operating expenses      
Lease operating expenses and taxes other than income 41,800,000 45,200,000  
Repair and maintenance 700,000 1,600,000  
Workovers 2,400,000 300,000  
Total lease operating expenses 44,900,000 47,100,000  
Severance and ad valorem taxes 800,000 300,000  
Transportation, gathering and processing 21,900,000 20,200,000  
Selling and general expenses 7,500,000 6,000,000.0  
Exploration Expense [Abstract]      
Geological and geophysical 0 0  
Dry holes and previously suspended exploration costs 0 0  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 0 100,000  
Total exploration expenses 0 100,000  
Depreciation, depletion and amortization 34,000,000.0 32,400,000  
Accretion of asset retirement obligations 2,600,000 2,500,000  
Other operating expenses 100,000 900,000  
Interest Income 0 0  
Interest expense, net of capitalization 100,000 0  
Income tax expense      
Current income tax expense 9,600,000 13,700,000  
Deferred income tax expense (benefit) 1,600,000 600,000  
Total income tax expense (benefit) 11,200,000 14,300,000  
Other segment costs (income) 400,000 400,000  
Net income including noncontrolling interest 31,700,000 41,500,000  
Additions to property, plant, equipment 62,100,000 55,400,000  
Total assets at quarter-end 1,980,300,000 1,963,400,000  
Operating Segments | Other      
Segment Reporting Information [Line Items]      
Gain on sale of assets and other operating income 0 0  
Total revenues and other income 2,900,000 0  
Lease operating expenses      
Lease operating expenses and taxes other than income 800,000 400,000  
Repair and maintenance 0 0  
Workovers 0 0  
Total lease operating expenses 800,000 400,000  
Severance and ad valorem taxes 0 0  
Transportation, gathering and processing 0 0  
Selling and general expenses 2,100,000 1,900,000  
Exploration Expense [Abstract]      
Geological and geophysical 800,000 300,000  
Dry holes and previously suspended exploration costs 67,100,000 0  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 9,200,000 8,000,000.0  
Total exploration expenses 77,100,000 8,300,000  
Depreciation, depletion and amortization 1,100,000 100,000  
Accretion of asset retirement obligations 200,000 200,000  
Other operating expenses 300,000 100,000  
Interest Income 0 0  
Interest expense, net of capitalization 0 0  
Income tax expense      
Current income tax expense 300,000 0  
Deferred income tax expense (benefit) 3,400,000 0  
Total income tax expense (benefit) 3,700,000 0  
Other segment costs (income) 300,000 200,000  
Net income including noncontrolling interest (82,700,000) (11,200,000)  
Additions to property, plant, equipment 71,300,000 35,300,000  
Total assets at quarter-end 660,700,000 345,700,000  
Operating Segments | Revenue from production      
Segment Reporting Information [Line Items]      
Revenue from production 732,400,000 672,700,000  
Operating Segments | Revenue from production | United States      
Segment Reporting Information [Line Items]      
Revenue from production 574,700,000 507,400,000  
Operating Segments | Revenue from production | Canada      
Segment Reporting Information [Line Items]      
Revenue from production 154,800,000 165,300,000  
Operating Segments | Revenue from production | Other      
Segment Reporting Information [Line Items]      
Revenue from production 2,900,000 0  
Corporate and Discontinued Operations      
Segment Reporting Information [Line Items]      
Gain on sale of assets and other operating income 0 (9,500,000)  
Total revenues and other income 0 (9,500,000)  
Lease operating expenses      
Lease operating expenses and taxes other than income 0 0  
Repair and maintenance 0 0  
Workovers 0 0  
Total lease operating expenses 0 0  
Severance and ad valorem taxes 0 0  
Transportation, gathering and processing 0 0  
Selling and general expenses 19,800,000 21,000,000.0  
Exploration Expense [Abstract]      
Geological and geophysical 0 0  
Dry holes and previously suspended exploration costs 0 0  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 0 0  
Total exploration expenses 0 0  
Depreciation, depletion and amortization 2,400,000 2,300,000  
Accretion of asset retirement obligations 100,000 0  
Other operating expenses 0 2,000,000.0  
Interest Income (2,300,000) (3,300,000)  
Interest expense, net of capitalization 28,800,000 23,500,000  
Income tax expense      
Current income tax expense 2,200,000 2,100,000  
Deferred income tax expense (benefit) (5,500,000) (8,700,000)  
Total income tax expense (benefit) (3,300,000) (6,600,000)  
Other segment costs (income) (8,600,000) 400,000  
Net income including noncontrolling interest (36,900,000) (48,800,000)  
Additions to property, plant, equipment 9,300,000 4,200,000  
Total assets at quarter-end 478,100,000 464,900,000  
Corporate and Discontinued Operations | Revenue from production      
Segment Reporting Information [Line Items]      
Revenue from production $ 0 $ 0