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Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss | 12 Months Ended
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Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss | Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss The balances of, and changes in, the components of accumulated other comprehensive loss, net of tax, consist of the following:
(in thousands) |  | Pension Plans and Other Postretirement Benefits |  | Foreign Currency Translation Adjustments |  |  | Accumulated Other Comprehensive (Loss) Income
Balance at December 31, 2017 |  | $ | (63,520) |  |  | $ | (82,474) |  |  |  | $ | (145,994) |
Other comprehensive income (loss) before reclassifications |  | (25,027) |  |  | (12,287) |  |  |  | (37,314) |
Amounts reclassified from accumulated other comprehensive loss (a) |  | 1,992 |  |  | 0 |  |  |  | 1,992 |
Other comprehensive income (loss) |  | (23,035) |  |  | (12,287) |  |  |  | (35,322) |
Balance at December 31, 2018 |  | (86,555) |  |  | (94,761) |  |  |  | (181,316) |
Other comprehensive income (loss) before reclassifications |  | 15,983 |  |  | 1,808 |  |  |  | 17,791 |
Amounts reclassified from accumulated other comprehensive loss (a) |  | 777 |  |  | 0 |  |  |  | 777 |
Other comprehensive income (loss) |  | 16,760 |  |  | 1,808 |  |  |  | 18,568 |
Balance at December 31, 2019 |  | (69,795) |  |  | (92,953) |  |  |  | (162,748) |
Other comprehensive income (loss) before reclassifications |  | (25,490) |  |  | 12,560 |  |  |  | (12,930) |
Amounts reclassified from accumulated other comprehensive loss (a) |  | 2,514 |  |  | 0 |  |  |  | 2,514 |
Other comprehensive income (loss) |  | (22,976) |  |  | 12,560 |  |  |  | (10,416) |
Balance at December 31, 2020 |  | $ | (92,771) |  |  | $ | (80,393) |  |  |  | $ | (173,164) |
(a) The pension plan and other postretirement benefit components of accumulated other comprehensive loss are included in the computation of net periodic benefit cost (income). See Note 17 for further 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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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