v3.25.2
Business Segments (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Segment Reporting Information [Line Items]          
Gain on sales of assets and other operating income $ 14,800,000 $ 1,800,000 $ 7,700,000 $ 3,300,000  
Revenues from external customers 697,800,000 802,800,000 1,363,500,000 1,599,200,000  
Lease operating expenses and taxes other than income 147,500,000 164,600,000 293,400,000 331,700,000  
Repair and maintenance 15,000,000.0 16,600,000 26,700,000 28,200,000  
Workovers 53,100,000 78,400,000 100,500,000 134,000,000.0  
Total lease operating expenses 215,554,000 259,628,000 420,633,000 493,892,000  
Severance and ad valorem taxes 10,828,000 10,417,000 19,478,000 20,503,000  
Transportation, gathering and processing 54,070,000 53,470,000 102,921,000 110,023,000  
Costs of purchased natural gas 0 2,987,000 0 3,147,000  
Selling and general expenses 36,900,000 22,900,000 67,800,000 54,100,000  
Geological and geophysical 900,000 8,100,000 4,400,000 9,700,000  
Dry holes and previously suspended exploration costs (900,000) 25,800,000 (700,000) 58,300,000  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 10,400,000 8,800,000 21,200,000 19,100,000  
Total exploration expenses 10,399,000 42,677,000 24,887,000 87,106,000  
Depreciation, depletion and amortization 259,300,000 215,500,000 453,500,000 426,700,000  
Impairment of assets 0 0 0 34,528,000  
Accretion of asset retirement obligations 14,432,000 13,053,000 28,477,000 25,827,000  
Other operating expenses 1,800,000 (2,200,000) 7,500,000 5,000,000.0  
Interest Income (3,200,000) (22,800,000) (6,900,000) (26,300,000)  
Interest expense, net of capitalization 25,053,000 20,986,000 48,576,000 41,007,000  
Current income tax expense (benefit) (3,800,000) (1,800,000) 12,600,000 8,700,000  
Deferred income tax expense (benefit) 4,800,000 34,400,000 21,200,000 54,000,000.0  
Total income tax expense (benefit) 1,000,000.0 32,600,000 33,800,000 62,700,000  
Other segment costs (income) 36,500,000 (2,600,000) 38,300,000 (9,800,000)  
Net income including noncontrolling interest 35,124,000 156,262,000 124,542,000 270,920,000  
Additions to property, plant, equipment 245,400,000 253,700,000 657,400,000 483,200,000  
Total assets at quarter-end 9,839,515,000 9,893,700,000 9,839,515,000 9,893,700,000 $ 9,667,479,000
Minimum          
Segment Reporting Information [Line Items]          
Interest expense, net of capitalization   20,900,000      
Net income including noncontrolling interest   156,200,000      
Revenue from production          
Segment Reporting Information [Line Items]          
Revenue from production 683,000,000.0 797,500,000 1,355,800,000    
Revenue from production | Maximum          
Segment Reporting Information [Line Items]          
Revenue from production       1,592,200,000  
Sales of purchased natural gas          
Segment Reporting Information [Line Items]          
Revenue from production   3,500,000   3,700,000  
Operating Segments          
Segment Reporting Information [Line Items]          
Gain on sales of assets and other operating income 1,700,000 1,800,000 4,100,000 3,300,000  
Revenues from external customers 684,700,000 802,800,000 1,359,900,000 1,599,200,000  
Lease operating expenses and taxes other than income 147,500,000 164,600,000 293,400,000 331,700,000  
Repair and maintenance 15,000,000.0 16,600,000 26,700,000 28,200,000  
Workovers 53,100,000 78,400,000 100,500,000 134,000,000.0  
Total lease operating expenses 215,600,000 259,600,000 420,600,000 493,900,000  
Severance and ad valorem taxes 10,800,000 10,400,000 19,500,000 20,500,000  
Transportation, gathering and processing 54,100,000 53,500,000 102,900,000 110,000,000.0  
Costs of purchased natural gas 0 3,000,000.0 0 3,100,000  
Selling and general expenses 13,100,000 2,900,000 23,000,000.0 9,100,000  
Geological and geophysical 900,000 8,100,000 4,400,000 9,700,000  
Dry holes and previously suspended exploration costs (900,000) 25,800,000 (700,000) 58,300,000  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 10,400,000 8,800,000 21,200,000 19,100,000  
Total exploration expenses 10,400,000 42,700,000 24,900,000 87,100,000  
Depreciation, depletion and amortization 257,600,000 212,900,000 449,400,000 421,200,000  
Impairment of assets   0   34,500,000  
Accretion of asset retirement obligations 14,400,000 13,100,000 28,500,000 25,800,000  
Other operating expenses 600,000 (1,900,000) 4,400,000 5,300,000  
Interest Income (500,000) (20,100,000) (900,000) (20,800,000)  
Interest expense, net of capitalization 200,000 100,000 100,000 300,000  
Current income tax expense (benefit) 1,200,000 (2,100,000) 15,500,000 4,500,000  
Deferred income tax expense (benefit) 16,300,000 42,600,000 41,400,000 73,300,000  
Total income tax expense (benefit) 17,500,000 40,500,000 56,900,000 77,800,000  
Other segment costs (income) 1,200,000 1,600,000 2,700,000 3,800,000  
Net income including noncontrolling interest 89,700,000 184,500,000 227,900,000 327,600,000  
Additions to property, plant, equipment 242,700,000 249,400,000 650,400,000 474,800,000  
Total assets at quarter-end 9,387,900,000 9,517,300,000 9,387,900,000 9,517,300,000  
Operating Segments | United States          
Segment Reporting Information [Line Items]          
Gain on sales of assets and other operating income 1,300,000 1,400,000 3,300,000 2,600,000  
Revenues from external customers 553,500,000 679,500,000 1,063,000,000 1,339,100,000  
Lease operating expenses and taxes other than income 100,000,000.0 120,400,000 200,300,000 240,600,000  
Repair and maintenance 13,900,000 15,700,000 24,100,000 26,800,000  
Workovers 52,600,000 76,100,000 99,700,000 131,500,000  
Total lease operating expenses 166,500,000 212,200,000 324,100,000 398,900,000  
Severance and ad valorem taxes 10,500,000 10,000,000.0 18,800,000 19,800,000  
Transportation, gathering and processing 30,300,000 34,200,000 59,000,000.0 70,800,000  
Costs of purchased natural gas 0 0 0 0  
Selling and general expenses 4,800,000 (3,400,000) 6,800,000 (3,500,000)  
Geological and geophysical 700,000 3,000,000.0 3,900,000 3,700,000  
Dry holes and previously suspended exploration costs (1,000,000.0) 25,800,000 (800,000) 57,100,000  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 3,600,000 3,800,000 6,300,000 7,100,000  
Total exploration expenses 3,300,000 32,600,000 9,400,000 67,900,000  
Depreciation, depletion and amortization 218,300,000 175,000,000.0 377,600,000 349,000,000.0  
Impairment of assets   0   34,500,000  
Accretion of asset retirement obligations 11,600,000 10,800,000 23,000,000.0 21,100,000  
Other operating expenses 1,300,000 (3,100,000) 4,000,000.0 3,200,000  
Interest Income (500,000) (20,100,000) (900,000) (20,800,000)  
Interest expense, net of capitalization 0 0 0 0  
Current income tax expense (benefit) 700,000 1,100,000 1,300,000 2,000,000.0  
Deferred income tax expense (benefit) 19,200,000 42,700,000 43,700,000 72,500,000  
Total income tax expense (benefit) 19,900,000 43,800,000 45,000,000.0 74,500,000  
Other segment costs (income) 1,000,000.0 1,800,000 1,800,000 3,500,000  
Net income including noncontrolling interest 86,500,000 185,700,000 194,400,000 320,200,000  
Additions to property, plant, equipment 176,200,000 195,200,000 493,200,000 350,500,000  
Total assets at quarter-end 6,984,900,000 7,222,600,000 6,984,900,000 7,222,600,000  
Operating Segments | Canada          
Segment Reporting Information [Line Items]          
Gain on sales of assets and other operating income 400,000 400,000 800,000 700,000  
Revenues from external customers 128,300,000 119,000,000.0 294,000,000.0 255,900,000  
Lease operating expenses and taxes other than income 46,600,000 43,700,000 91,900,000 90,400,000  
Repair and maintenance 1,100,000 900,000 2,600,000 1,400,000  
Workovers 500,000 2,300,000 800,000 2,500,000  
Total lease operating expenses 48,200,000 46,900,000 95,300,000 94,300,000  
Severance and ad valorem taxes 300,000 400,000 700,000 700,000  
Transportation, gathering and processing 23,800,000 19,300,000 43,900,000 39,200,000  
Costs of purchased natural gas 0 3,000,000.0 0 3,100,000  
Selling and general expenses 5,700,000 4,500,000 11,700,000 9,600,000  
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 0 100,000 100,000 0  
Total exploration expenses 0 200,000 100,000 100,000  
Depreciation, depletion and amortization 38,100,000 37,000,000.0 70,500,000 71,300,000  
Impairment of assets   0   0  
Accretion of asset retirement obligations 2,600,000 2,100,000 5,100,000 4,300,000  
Other operating expenses 700,000 1,100,000 1,700,000 2,000,000.0  
Interest Income 0 0 0 0  
Interest expense, net of capitalization 200,000 100,000 0 200,000  
Current income tax expense (benefit) 300,000 (3,500,000) 14,000,000.0 2,200,000  
Deferred income tax expense (benefit) (2,200,000) (700,000) (1,600,000) 500,000  
Total income tax expense (benefit) (1,900,000) (4,200,000) 12,400,000 2,700,000  
Other segment costs (income) 100,000 (300,000) 600,000 100,000  
Net income including noncontrolling interest 10,500,000 8,900,000 52,000,000.0 28,300,000  
Additions to property, plant, equipment 45,700,000 42,100,000 101,100,000 109,300,000  
Total assets at quarter-end 2,038,600,000 2,050,500,000 2,038,600,000 2,050,500,000  
Operating Segments | Other          
Segment Reporting Information [Line Items]          
Gain on sales of assets and other operating income 0 0 0 0  
Revenues from external customers 2,900,000 4,300,000 2,900,000 4,200,000  
Lease operating expenses and taxes other than income 900,000 500,000 1,200,000 700,000  
Repair and maintenance 0 0 0 0  
Workovers 0 0 0 0  
Total lease operating expenses 900,000 500,000 1,200,000 700,000  
Severance and ad valorem taxes 0 0 0 0  
Transportation, gathering and processing 0 0 0 0  
Costs of purchased natural gas 0 0 0 0  
Selling and general expenses 2,600,000 1,800,000 4,500,000 3,000,000.0  
Geological and geophysical 200,000 5,000,000.0 500,000 5,900,000  
Dry holes and previously suspended exploration costs 100,000 0 100,000 1,200,000  
Other exploratory costs, including undeveloped lease amortization and delay lease rentals 6,800,000 4,900,000 14,800,000 12,000,000.0  
Total exploration expenses 7,100,000 9,900,000 15,400,000 19,100,000  
Depreciation, depletion and amortization 1,200,000 900,000 1,300,000 900,000  
Impairment of assets   0   0  
Accretion of asset retirement obligations 200,000 200,000 400,000 400,000  
Other operating expenses (1,400,000) 100,000 (1,300,000) 100,000  
Interest Income 0 0 0 0  
Interest expense, net of capitalization 0 0 100,000 100,000  
Current income tax expense (benefit) 200,000 300,000 200,000 300,000  
Deferred income tax expense (benefit) (700,000) 600,000 (700,000) 300,000  
Total income tax expense (benefit) (500,000) 900,000 (500,000) 600,000  
Other segment costs (income) 100,000 100,000 300,000 200,000  
Net income including noncontrolling interest (7,300,000) (10,100,000) (18,500,000) (20,900,000)  
Additions to property, plant, equipment 20,800,000 12,100,000 56,100,000 15,000,000.0  
Total assets at quarter-end 364,400,000 244,200,000 364,400,000 244,200,000  
Operating Segments | Revenue from production          
Segment Reporting Information [Line Items]          
Revenue from production 683,000,000.0 797,500,000 1,355,800,000 1,592,200,000  
Operating Segments | Revenue from production | United States          
Segment Reporting Information [Line Items]          
Revenue from production 552,200,000 678,100,000 1,059,700,000 1,336,500,000  
Operating Segments | Revenue from production | Canada          
Segment Reporting Information [Line Items]          
Revenue from production 127,900,000 115,100,000 293,200,000 251,500,000  
Operating Segments | Revenue from production | Other          
Segment Reporting Information [Line Items]          
Revenue from production 2,900,000 4,300,000 2,900,000 4,200,000  
Operating Segments | Sales of purchased natural gas          
Segment Reporting Information [Line Items]          
Revenue from production   3,500,000   3,700,000  
Operating Segments | Sales of purchased natural gas | United States          
Segment Reporting Information [Line Items]          
Revenue from production   0   0  
Operating Segments | Sales of purchased natural gas | Canada          
Segment Reporting Information [Line Items]          
Revenue from production   3,500,000   3,700,000  
Operating Segments | Sales of purchased natural gas | Other          
Segment Reporting Information [Line Items]          
Revenue from production   0   0  
Corporate, Other, and Discontinued Operations          
Segment Reporting Information [Line Items]          
Gain on sales of assets and other operating income 13,100,000 0 3,600,000 0  
Revenues from external customers 13,100,000 0 3,600,000 0  
Lease operating expenses and taxes other than income 0 0 0 0  
Repair and maintenance 0 0 0 0  
Workovers 0 0 0 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  
Costs of purchased natural gas 0 0 0 0  
Selling and general expenses 23,800,000 20,000,000.0 44,800,000 45,000,000.0  
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 1,700,000 2,600,000 4,100,000 5,500,000  
Impairment of assets   0   0  
Accretion of asset retirement obligations 0 0 0 0  
Other operating expenses 1,200,000 (300,000) 3,100,000 (300,000)  
Interest Income (2,700,000) (2,700,000) (6,000,000.0) (5,500,000)  
Interest expense, net of capitalization 24,900,000 20,800,000 48,500,000 40,700,000  
Current income tax expense (benefit) (5,000,000.0) 300,000 (2,900,000) 4,200,000  
Deferred income tax expense (benefit) (11,500,000) (8,200,000) (20,200,000) (19,300,000)  
Total income tax expense (benefit) (16,500,000) (7,900,000) (23,100,000) (15,100,000)  
Other segment costs (income) 35,300,000 (4,200,000) 35,600,000 (13,600,000)  
Net income including noncontrolling interest (54,600,000) (28,300,000) (103,400,000) (56,700,000)  
Additions to property, plant, equipment 2,700,000 4,300,000 7,000,000.0 8,400,000  
Total assets at quarter-end 451,600,000 376,400,000 451,600,000 376,400,000  
Corporate, Other, and Discontinued Operations | Revenue from production          
Segment Reporting Information [Line Items]          
Revenue from production $ 0 0 $ 0 0  
Corporate, Other, and Discontinued Operations | Sales of purchased natural gas          
Segment Reporting Information [Line Items]          
Revenue from production   $ 0   $ 0