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Leases (Tables) | 12 Months Ended
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Dec. 31, 2022
Leases [Abstract] |
Summary of Lease Expenses, Term and Discount Rate | Expenses related to finance and operating leases included in the Consolidated Financial Statements are as follows:
|  |  |  | Year Ended December 31,
(Thousands of dollars) |  | Financial Statement Category |  | 2022 |  | 2021
Operating lease 1,2 |  | Lease operating expenses |  | $ | 217,038 |  |  | $ | 198,189 |
Operating lease 2 |  | Transportation, gathering and processing |  | 39,669 |  |  | 39,396 |
Operating lease 2 |  | Selling and general expense |  | 8,003 |  |  | 9,019 |
Operating lease 2 |  | Other operating expense |  | 510 |  |  | 7,480 |
Operating lease 2 |  | Exploration expenses |  | 10,019 |  |  | 902 |
Operating lease 2 |  | Property, plant and equipment |  | 196,829 |  |  | 81,924 |
Operating lease 2 |  | Asset retirement obligations |  | 11,190 |  |  | 11,103 |
Finance lease |  |  |  |  |  |
Amortization of asset |  | Depreciation, depletion and amortization |  | 5,481 |  |  | 1,173 |
Interest on lease liabilities |  | Interest expense, net |  | 254 |  |  | 228 |
Sublease income |  | Other income |  | (1,296) |  |  | (2,482) |
Net lease expense |  |  |  | $ | 487,697 |  |  | $ | 346,932 |
1 Variable lease expenses. For the years ended December 31, 2022 and 2021, includes variable lease expenses of $32.2 million and $25.8 million, respectively, primarily related to additional volumes processed at a natural gas processing plant. 2 Short-term leases due within 12 months. For the year ended December 31, 2022, includes $62.8 million in LOE, $31.5 million for “Transportation, gathering and processing”, $8.8 million for “Exploration expenses, including undeveloped lease amortization”, $0.7 million in “Selling and general expenses”, $0.1 million in “Other operating expense”, $125.4 million in “Property, plant and equipment, net” and $11.2 million in “Asset retirement obligations” relating to short-term leases due within 12 months. Expenses primarily relate to drilling rigs and other oil and natural gas field equipment. For the year ended December 31, 2021, includes $56.9 million in LOE, $30.2 million in “Transportation, gathering and processing”, $2.1 million in “Selling and general expenses", $0.2 million in “Other operating expense”, $28.9 million in “Property, plant and equipment, net” and $11.1 million in “Asset retirement obligations” relating to short-term leases due within 12 months. Expenses primarily relate to drilling rigs and other oil and natural gas field equipment. Lease Term and Discount Rate
| December 31, 2022 |  | December 31, 2021
Weighted average remaining lease term: |  |  |
Operating leases | 9 years |  | 12 years
Finance leases | 6 years |  | 7 years
Weighted average discount rate: |  |  |
Operating leases | 5.9 | % |  | 5.7 | %
Finance leases | 4.7 | % |  | 4.7 | %
Maturity of Operating Leases | Maturity of Lease Liabilities
(Thousands of dollars) | Operating Leases |  | Finance Leases |  | Total
2023 | $ | 270,868 |  |  | $ | 1,068 |  |  | $ | 271,936 |
2024 | 241,455 |  |  | 1,069 |  |  | 242,524 |
2025 | 79,974 |  |  | 1,068 |  |  | 81,042 |
2026 | 61,534 |  |  | 1,069 |  |  | 62,603 |
2027 | 59,964 |  |  | 1,069 |  |  | 61,033 |
Remaining | 548,118 |  |  | 1,336 |  |  | 549,454 |
Total future minimum lease payments | 1,261,913 |  |  | 6,679 |  |  | 1,268,592 |
Less imputed interest | (298,846) |  |  | (1,835) |  |  | (300,681) |
Present value of lease liabilities 1 | $ | 963,067 |  |  | $ | 4,844 |  |  | $ | 967,911 |
1 Includes both the current and long-term portion of the lease liabilities.
Maturity of Finance Leases | Maturity of Lease Liabilities
(Thousands of dollars) | Operating Leases |  | Finance Leases |  | Total
2023 | $ | 270,868 |  |  | $ | 1,068 |  |  | $ | 271,936 |
2024 | 241,455 |  |  | 1,069 |  |  | 242,524 |
2025 | 79,974 |  |  | 1,068 |  |  | 81,042 |
2026 | 61,534 |  |  | 1,069 |  |  | 62,603 |
2027 | 59,964 |  |  | 1,069 |  |  | 61,033 |
Remaining | 548,118 |  |  | 1,336 |  |  | 549,454 |
Total future minimum lease payments | 1,261,913 |  |  | 6,679 |  |  | 1,268,592 |
Less imputed interest | (298,846) |  |  | (1,835) |  |  | (300,681) |
Present value of lease liabilities 1 | $ | 963,067 |  |  | $ | 4,844 |  |  | $ | 967,911 |
1 Includes both the current and long-term portion of the lease liabilities.
Summary of Other Lease Information | Other Information
| Year Ended December 31,
(Thousands of dollars) | 2022 |  | 2021
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Operating cash flows from operating leases | $ | 212,061 |  |  | $ | 194,412 |
Operating cash flows from finance leases | 254 |  |  | 228 |
Financing cash flows from finance leases | 636 |  |  | 803 |
Right-of-use assets obtained in exchange for lease liabilities: |  |  |
Operating leases ¹ | $ | 262,669 |  |  | $ | 95,500 |
1 For the year ended December 31, 2022, ROU assets obtained in exchange for lease liabilities primarily includes $254.0 million related to an extension of the lease of an existing offshore drilling rig by 24 months. December 31, 2021, includes $90.3 million related to an offshore drilling rig with a lease term of 16 months.

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- Definition Tabular disclosure of undiscounted cash flows of finance lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to finance lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
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