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Property, Plant and Equipment (Tables) | 9 Months Ended
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Sep. 30, 2025
Property, Plant and Equipment [Abstract] |
Schedule of Net Changes in Capitalized Exploratory Well Costs | The following table reflects the net changes in capitalized exploratory well costs during the nine-month periods ended September 30, 2025 and 2024.
(Thousands of dollars) | 2025 |  | 2024
Beginning balance at January 1 | $ | 72,055 |  |  | $ | 49,118 |
Additions pending the determination of proved reserves | 43,091 |  |  | 28,452 |
Capitalized exploratory well costs charged to expense | — |  |  | (26,471) |
Balance at September 30 | $ | 115,146 |  |  | $ | 51,099 |
Schedule of Aging of Capitalized Exploratory Well Costs | The following table provides an aging of capitalized exploration well costs based on the date the drilling was completed for each individual well.
| September 30,
| 2025 |  | 2024
(Thousands of dollars) | Amount |  | No. of Wells |  |  |  | Amount |  | No. of Wells |  |
Aging of capitalized well costs: |  |  |  |  |  |  |  |  |  |  |
Zero to one year | $ | 17,562 |  |  | 5 |  |  |  |  | $ | 28,552 |  |  | 3 |  |  |
One to two years | 75,171 |  |  | 3 |  |  |  |  | — |  |  | — |  |  |
Two to three years | — |  |  | — |  |  |  |  | — |  |  | — |  |  |
Three years or more | 22,413 |  |  | 3 |  |  |  |  | 22,547 |  |  | 3 |  |  |
| $ | 115,146 |  |  | 11 |  |  |  |  | $ | 51,099 |  |  | 6 |  |  |

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- Definition Tabular disclosure of the change in capitalized exploratory costs during the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B + Details
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- Definition Tabular disclosure of aging for exploratory well cost capitalized for period of greater than one year after completion of drilling and number of related projects in oil- and gas-producing activities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B + Details
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