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Accumulated Other Comprehensive Loss (Tables) | 9 Months Ended
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Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Components of Accumulated Other Comprehensive Loss | The components of Accumulated other comprehensive loss on the Consolidated Balance Sheets at December 31, 2018 and September 30, 2019 and the changes during the nine-month period ended September 30, 2019, are presented net of taxes in the following table.
(Thousands of dollars) | Foreign Currency Translation Gains (Losses) |  | Retirement and Postretirement Benefit Plan Adjustments |  | Deferred Loss on Interest Rate Derivative Hedges |  | Total
Balance at December 31, 2018 | $ | (419,852 | ) |  | (182,036 | ) |  | (7,899 | ) |  | (609,787 | )
2019 components of other comprehensive income (loss): |  |  |  |  |  |  |
Before reclassifications to income and retained earnings | 36,927 |  |  | — |  |  | — |  |  | 36,927 |
Reclassifications to income | — |  |  | 8,277 |  | ¹ | 1,756 |  | ² | 10,033 |
Net other comprehensive income (loss) | 36,927 |  |  | 8,277 |  |  | 1,756 |  |  | 46,960 |
Balance at September 30, 2019 | $ | (382,925 | ) |  | (173,759 | ) |  | (6,143 | ) |  | (562,827 | )
1 Reclassifications before taxes of $10,598 are included in the computation of net periodic benefit expense for the nine-month period ended September 30, 2019. See Note H for additional information. Related income taxes of $2,321 are included in Income tax expense (benefit) for the nine-month period ended September 30, 2019. 2 Reclassifications before taxes of $2,223 are included in Interest expense, net, for the nine-month period ended September 30, 2019. Related income taxes of $467 are included in Income tax expense (benefit) for the nine-month period ended September 30, 2019. See Note L for additional information.

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