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OTHER INCOME AND OTHER EXPENSE (Tables) | 12 Months Ended
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Dec. 31, 2023
Schedule of Other Nonoperating Income (Expense) | The following table sets forth the components of other income and other expense for the periods indicated:
|  |  |  | Year Ended December 31,
|  |  |  |  |  | 2023 |  | 2022 |  | 2021
|  |  |  |  |  | (Thousands of dollars)
Net periodic benefit (cost) other than service cost |  |  |  |  |  | $ | 4,017 |  |  | $ | 3,766 |  |  | $ | (3,930) |
Earnings (losses) on investments associated with nonqualified employee benefit plans |  |  |  |  |  | 4,826 |  |  | (7,197) |  |  | 3,699 |
Other income (expense), net |  |  |  |  |  | 633 |  |  | (752) |  |  | (2,976) |
Total other income (expense), net |  |  |  |  |  | $ | 9,476 |  |  | $ | (4,183) |  |  | $ | (3,207) |

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- Definition Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration