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OTHER INCOME AND OTHER EXPENSE (Tables) | 6 Months Ended
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Jun. 30, 2026
Schedule of Other Nonoperating Income (Expense) | The following table sets forth the components of other income and other expense for the periods indicated:
| Three Months Ended |  | Six Months Ended |
| June 30, |  | June 30, |
| 2026 |  | 2025 |  | 2026 |  | 2025 |  |  |
| (Thousands of dollars) |
Net periodic benefit (cost) credit other than service cost | $ | (972) |  |  | $ | 356 |  |  | $ | (2,125) |  |  | $ | 688 |  |  |  |
Gain (loss) on investments associated with nonqualified deferred compensation plans | 3,739 |  |  | 2,062 |  |  | 3,001 |  |  | 2,209 |  |  |  |
Unrealized gain (loss) on marketable equity securities | 372 |  |  | 184 |  |  | 250 |  |  | 184 |  |  |  |
Credit due to change in federal tax regulation for securitization (a) | 2,390 |  |  | — |  |  | 2,390 |  |  | — |  |  |  |
Other income (expense), net | (309) |  |  | (30) |  |  | (393) |  |  | 9 |  |  |  |
Total other income (expense), net | $ | 5,220 |  |  | $ | 2,572 |  |  | $ | 3,123 |  |  | $ | 3,090 |  |  |  |
(a) See Note 10 for additional detail.

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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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