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Accumulated Other Comprehensive Loss | 12 Months Ended
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Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive Loss The components of Accumulated other comprehensive loss on the Consolidated Balance Sheets at December 31, 2019 and December 31, 2018 and the changes during 2019 and 2018 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, 2017 | (274,830 | ) |  | (178,987 | ) |  | (8,426 | ) |  | (462,243 | )
2017 components of other comprehensive income (loss): |  |  |  |  |  |  |
Before reclassifications to income | (145,022 | ) |  | (16,839 | ) |  | (1,815 | ) |  | (163,676 | )
Reclassifications to income | — |  |  | 13,790 |  |  | 2,342 |  |  | 16,132 |
Net other comprehensive income | (145,022 | ) |  | (3,049 | ) |  | 527 |  |  | (147,544 | )
Balance at December 31, 2018 | (419,852 | ) |  | (182,036 | ) |  | (7,899 | ) |  | (609,787 | )
2018 components of other comprehensive income (loss): |  |  |  |  |  |  |
Before reclassifications to income | 66,600 |  |  | (47,264 | ) |  | — |  |  | 19,336 |
Reclassifications to income | — |  |  | 11,285 |  | ¹ | 5,005 |  | ² | 16,290 |
Net other comprehensive income (loss) | 66,600 |  |  | (35,979 | ) |  | 5,005 |  |  | 35,626 |
Balance at December 31, 2019 | $ | (353,252 | ) |  | (218,015 | ) |  | (2,894 | ) |  | (574,161 | )
1 Reclassifications before taxes of $14,380 and $17,313 are included in the computation of net periodic benefit expense in 2019 and 2018, respectively. See Note L for additional information. Related income taxes of $3,095 and $3,523 are included in income tax expense in 2019 and 2018, respectively. 2 Reclassifications before taxes of $6,335 and $2,963 are included in Interest expense in 2019 and 2018. Related income taxes of $1,330 and $622 are included in income tax expense in 2019 and 2018. See Note M for additional information.

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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