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Supplemental Oil and Gas Information (Unaudited) - Results of Operations for Oil and Gas Producing Activities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Revenues |  |  |
Revenues | $ 3,448,900 | $ 4,220,200 | $ 2,801,200
Other operating revenues | 7,900 | 26,700 | 17,500
Total revenues | 3,456,800 | 4,246,900 | 2,818,700
Costs and expenses |  |  |
Lease operating expenses | 784,400 | 679,300 | 539,500
Severance and ad valorem taxes | 42,800 | 57,000 | 41,200
Transportation, gathering and processing | 232,985 | 212,711 | 187,028
Costs of purchased natural gas | 51,682 | 171,991 | 0
Exploration costs charged to expense | 223,900 | 119,800 | 50,100
Undeveloped lease amortization | 10,900 | 13,300 | 18,900
Depreciation, depletion and amortization | 850,500 | 763,900 | 782,100
Accretion of asset retirement obligations | 46,000 | 46,200 | 46,600
Impairment of assets |  |  | 189,300
Selling and general expenses | 37,700 | 44,500 | 43,600
Other expenses (benefits) | 56,900 | 141,800 | 31,000
Total costs and expenses | 2,337,800 | 2,250,500 | 1,929,300
Results of operations before taxes | 1,119,000 | 1,996,400 | 889,400
Income tax expense (benefit) | 237,800 | 417,300 | 172,700
Results of operations | 881,200 | 1,579,100 | 716,700
Crude Oil and Natural Gas Liquids |  |  |
Revenues |  |  |
Revenues | 3,005,800 | 3,500,600 | 2,433,500
Natural Gas |  |  |
Revenues |  |  |
Revenues | 370,900 | 537,900 | 367,700
Sales of purchased natural gas |  |  |
Revenues |  |  |
Revenues | 72,200 | 181,700 |
U.S. |  |  |
Revenues |  |  |
Revenues | 2,921,800 | 3,435,800 | 2,321,500
Other operating revenues | 6,500 | 25,400 | 16,000
Total revenues | 2,928,300 | 3,461,200 | 2,337,500
Costs and expenses |  |  |
Lease operating expenses | 630,700 | 522,700 | 406,400
Severance and ad valorem taxes | 41,400 | 55,700 | 39,600
Transportation, gathering and processing | 157,000 | 142,200 | 126,500
Costs of purchased natural gas | 0 | 200 |
Exploration costs charged to expense | 166,500 | 38,800 | 30,400
Undeveloped lease amortization | 8,100 | 8,700 | 11,100
Depreciation, depletion and amortization | 706,000 | 617,000 | 616,500
Accretion of asset retirement obligations | 37,800 | 36,500 | 36,900
Impairment of assets |  |  | 0
Selling and general expenses | 11,800 | 20,400 | 20,500
Other expenses (benefits) | 31,200 | 126,300 | 99,400
Total costs and expenses | 1,790,500 | 1,568,500 | 1,387,300
Results of operations before taxes | 1,137,800 | 1,892,700 | 950,200
Income tax expense (benefit) | 232,700 | 370,800 | 183,900
Results of operations | 905,100 | 1,521,900 | 766,300
U.S. | Crude Oil and Natural Gas Liquids |  |  |
Revenues |  |  |
Revenues | 2,829,100 | 3,210,300 | 2,199,700
U.S. | Natural Gas |  |  |
Revenues |  |  |
Revenues | 92,700 | 225,300 | 121,800
U.S. | Sales of purchased natural gas |  |  |
Revenues |  |  |
Revenues | 0 | 200 |
Canada | Conventional gas |  |  |
Revenues |  |  |
Revenues | 516,100 | 761,600 | 474,800
Other operating revenues | 1,400 | 1,300 | 1,500
Total revenues | 517,500 | 762,900 | 476,300
Costs and expenses |  |  |
Lease operating expenses | 151,800 | 155,100 | 136,300
Severance and ad valorem taxes | 1,400 | 1,300 | 1,600
Transportation, gathering and processing | 76,000 | 70,500 | 60,500
Costs of purchased natural gas | 51,700 | 171,800 |
Exploration costs charged to expense | 400 | 800 | 400
Undeveloped lease amortization | 100 | 200 | 200
Depreciation, depletion and amortization | 142,200 | 141,500 | 163,800
Accretion of asset retirement obligations | 7,800 | 9,600 | 9,700
Impairment of assets |  |  | 171,300
Selling and general expenses | 16,500 | 21,900 | 16,500
Other expenses (benefits) | 16,800 | 12,400 | (66,200)
Total costs and expenses | 464,700 | 585,100 | 494,100
Results of operations before taxes | 52,800 | 177,800 | (17,800)
Income tax expense (benefit) | 11,200 | 43,600 | (1,700)
Results of operations | 41,600 | 134,200 | (16,100)
Canada | Crude Oil and Natural Gas Liquids | Conventional gas |  |  |
Revenues |  |  |
Revenues | 165,700 | 267,500 | 228,900
Canada | Natural Gas | Conventional gas |  |  |
Revenues |  |  |
Revenues | 278,200 | 312,600 | 245,900
Canada | Sales of purchased natural gas | Conventional gas |  |  |
Revenues |  |  |
Revenues | 72,200 | 181,500 |
Other |  |  |
Revenues |  |  |
Revenues | 11,000 | 22,800 | 4,900
Other operating revenues | 0 | 0 | 0
Total revenues | 11,000 | 22,800 | 4,900
Costs and expenses |  |  |
Lease operating expenses | 1,900 | 1,500 |
Lease operating expenses |  |  | (3,200)
Severance and ad valorem taxes | 0 | 0 | 0
Transportation, gathering and processing | 0 | 0 | 0
Costs of purchased natural gas | 0 | 0 |
Exploration costs charged to expense | 57,000 | 80,200 | 19,300
Undeveloped lease amortization | 2,700 | 4,400 | 7,600
Depreciation, depletion and amortization | 2,300 | 5,400 | 1,800
Accretion of asset retirement obligations | 400 | 100 | 0
Impairment of assets |  |  | 18,000
Selling and general expenses | 9,400 | 2,200 | 6,600
Other expenses (benefits) | 8,900 | 3,100 | (2,200)
Total costs and expenses | 82,600 | 96,900 | 47,900
Results of operations before taxes | (71,600) | (74,100) | (43,000)
Income tax expense (benefit) | (6,100) | 2,900 | (9,500)
Results of operations | (65,500) | (77,000) | (33,500)
Other | Crude Oil and Natural Gas Liquids |  |  |
Revenues |  |  |
Revenues | 11,000 | 22,800 | 4,900
Other | Natural Gas |  |  |
Revenues |  |  |
Revenues | 0 | 0 | $ 0
Other | Sales of purchased natural gas |  |  |
Revenues |  |  |
Revenues | $ 0 | $ 0 |

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