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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, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Revenues |  |  |
Revenues | $ 4,220,200 | $ 2,801,200 | $ 1,751,700
Other operating revenues | 26,700 | 17,500 | 7,700
Total revenues | 4,246,900 | 2,818,700 | 1,759,400
Costs and expenses |  |  |
Lease operating expenses | 679,300 | 539,500 | 600,100
Severance and ad valorem taxes | 57,000 | 41,200 | 28,500
Transportation, gathering and processing | 212,711 | 187,028 | 172,399
Costs of purchased natural gas | 171,991 | 0 | 0
Restructuring expenses | 0 | 0 | 49,994
Restructuring expenses |  |  | 1,200
Exploration costs charged to expense | 119,800 | 50,100 | 59,700
Undeveloped lease amortization | 13,300 | 18,900 | 26,800
Depreciation, depletion and amortization | 763,900 | 782,100 | 964,900
Accretion of asset retirement obligations | 46,200 | 46,600 | 42,200
Impairment of assets |  | 189,300 |
Impairment of assets |  |  | 1,192,200
Selling and general expenses | 44,500 | 43,600 | 48,800
Other expenses (benefits) | 141,800 | 31,000 | 21,000
Total costs and expenses | 2,250,500 | 1,929,300 | 3,157,800
Results of operations before taxes | 1,996,400 | 889,400 | (1,398,400)
Income tax expense (benefit) | 417,300 | 172,700 | (263,500)
Results of operations | 1,579,100 | 716,700 | (1,134,900)
Crude Oil and Natural Gas Liquids |  |  |
Revenues |  |  |
Revenues | 3,500,600 | 2,433,500 | 1,511,600
Natural Gas |  |  |
Revenues |  |  |
Revenues | 537,900 | 367,700 | 240,100
Sales of purchased natural gas |  |  |
Revenues |  |  |
Revenues | 181,700 |  |
U.S. |  |  |
Revenues |  |  |
Revenues | 3,435,800 | 2,321,500 | 1,405,300
Other operating revenues | 25,400 | 16,000 | 6,500
Total revenues | 3,461,200 | 2,337,500 | 1,411,800
Costs and expenses |  |  |
Lease operating expenses | 522,700 | 406,400 | 476,900
Severance and ad valorem taxes | 55,700 | 39,600 | 27,200
Transportation, gathering and processing | 142,200 | 126,500 | 127,700
Costs of purchased natural gas | 200 |  |
Restructuring expenses |  |  | 1,200
Exploration costs charged to expense | 38,800 | 30,400 | 35,500
Undeveloped lease amortization | 8,700 | 11,100 | 17,200
Depreciation, depletion and amortization | 617,000 | 616,500 | 749,400
Accretion of asset retirement obligations | 36,500 | 36,900 | 36,600
Impairment of assets |  | 0 |
Impairment of assets |  |  | 1,152,500
Selling and general expenses | 20,400 | 20,500 | 24,600
Other expenses (benefits) | 126,300 | 99,400 | 21,500
Total costs and expenses | 1,568,500 | 1,387,300 | 2,670,300
Results of operations before taxes | 1,892,700 | 950,200 | (1,258,500)
Income tax expense (benefit) | 370,800 | 183,900 | (244,200)
Results of operations | 1,521,900 | 766,300 | (1,014,300)
U.S. | Crude Oil and Natural Gas Liquids |  |  |
Revenues |  |  |
Revenues | 3,210,300 | 2,199,700 | 1,335,800
U.S. | Natural Gas |  |  |
Revenues |  |  |
Revenues | 225,300 | 121,800 | 69,400
U.S. | Sales of purchased natural gas |  |  |
Revenues |  |  |
Revenues | 200 |  |
Canada | Conventional gas |  |  |
Revenues |  |  |
Revenues | 761,600 | 474,800 | 344,600
Other operating revenues | 1,300 | 1,500 | 1,200
Total revenues | 762,900 | 476,300 | 345,800
Costs and expenses |  |  |
Lease operating expenses | 155,100 | 136,300 | 121,600
Severance and ad valorem taxes | 1,300 | 1,600 | 1,300
Transportation, gathering and processing | 70,500 | 60,500 | 44,700
Costs of purchased natural gas | 171,800 |  |
Restructuring expenses |  |  | 0
Exploration costs charged to expense | 800 | 400 | 600
Undeveloped lease amortization | 200 | 200 | 400
Depreciation, depletion and amortization | 141,500 | 163,800 | 213,200
Accretion of asset retirement obligations | 9,600 | 9,700 | 5,600
Impairment of assets |  | 171,300 |
Impairment of assets |  |  | 0
Selling and general expenses | 21,900 | 16,500 | 17,100
Other expenses (benefits) | 12,400 | (66,200) | (2,300)
Total costs and expenses | 585,100 | 494,100 | 402,200
Results of operations before taxes | 177,800 | (17,800) | (56,400)
Income tax expense (benefit) | 43,600 | (1,700) | (21,400)
Results of operations | 134,200 | (16,100) | (35,000)
Canada | Crude Oil and Natural Gas Liquids | Conventional gas |  |  |
Revenues |  |  |
Revenues | 267,500 | 228,900 | 174,000
Canada | Natural Gas | Conventional gas |  |  |
Revenues |  |  |
Revenues | 312,600 | 245,900 | 170,600
Canada | Sales of purchased natural gas | Conventional gas |  |  |
Revenues |  |  |
Revenues | 181,500 |  |
Other |  |  |
Revenues |  |  |
Revenues | 22,800 | 4,900 | 1,800
Other operating revenues | 0 | 0 | 0
Total revenues | 22,800 | 4,900 | 1,800
Costs and expenses |  |  |
Lease operating expenses | 1,500 | (3,200) | 1,600
Severance and ad valorem taxes | 0 | 0 | 0
Transportation, gathering and processing | 0 | 0 | 0
Costs of purchased natural gas | 0 |  |
Restructuring expenses |  |  | 0
Exploration costs charged to expense | 80,200 | 19,300 | 23,600
Undeveloped lease amortization | 4,400 | 7,600 | 9,200
Depreciation, depletion and amortization | 5,400 | 1,800 | 2,300
Accretion of asset retirement obligations | 100 | 0 | 0
Impairment of assets |  | 18,000 |
Impairment of assets |  |  | 39,700
Selling and general expenses | 2,200 | 6,600 | 7,100
Other expenses (benefits) | 3,100 | (2,200) | 1,800
Total costs and expenses | 96,900 | 47,900 | 85,300
Results of operations before taxes | (74,100) | (43,000) | (83,500)
Income tax expense (benefit) | 2,900 | (9,500) | 2,100
Results of operations | (77,000) | (33,500) | (85,600)
Other | Crude Oil and Natural Gas Liquids |  |  |
Revenues |  |  |
Revenues | 22,800 | 4,900 | 1,800
Other | Natural Gas |  |  |
Revenues |  |  |
Revenues | 0 | $ 0 | $ 0
Other | Sales of purchased natural gas |  |  |
Revenues |  |  |
Revenues | $ 0 |  |

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