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Accumulated Other Comprehensive Loss (Tables) | 9 Months Ended
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Sep. 30, 2025
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule of Components of Accumulated Other Comprehensive Loss | The components of “Accumulated other comprehensive loss” on the Consolidated Balance Sheets at December 31, 2024 and September 30, 2025, and the changes during the nine-month period ended September 30, 2025, are presented net of taxes in the following table.
(Thousands of dollars) | Foreign Currency Translation Gains (Losses) |  | Retirement and Postretirement Benefit Plan Adjustments |  |  |  | Total
Balance at December 31, 2024 | $ | (516,324) |  |  | $ | (111,748) |  |  |  |  | $ | (628,072) |
Components of other comprehensive income (loss): |  |  |  |  |  |  |
Before reclassifications to income | 50,528 |  |  | — |  |  |  |  | 50,528 |
Reclassifications to income ¹ | — |  |  | 2,613 |  |  |  |  | 2,613 |
Net other comprehensive income (loss) | 50,528 |  |  | 2,613 |  |  |  |  | 53,141 |
Balance at September 30, 2025 | $ | (465,796) |  |  | $ | (109,135) |  |  |  |  | $ | (574,931) |
1 Reclassifications before taxes of $3.1 million are included in the computation of net periodic benefit expense for the nine-month period ended September 30, 2025. See Note H for additional information. Related income taxes of $0.5 million are included in "Income tax expense” on the Consolidated Statements of Operations for the nine-month period ended September 30, 2025.

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