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Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss (Components of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Pension Plans and Other Postretirement Benefits, Beginning Balance | $ (69,795) | $ (86,555) | $ (63,520)
Foreign Currency Translation Adjustments, Beginning Balance | (92,953) | (94,761) | (82,474)
Accumulated Other Comprehensive (Loss) Income, Beginning Balance | (162,748) | (181,316) | (145,994)
Other comprehensive income (loss) before reclassifications, Pension Plans and Other Postretirement Benefits | (25,490) | 15,983 | (25,027)
Other comprehensive income (loss) before reclassifications, Foreign Currency Translation Adjustments | 12,560 | 1,808 | (12,287)
Other comprehensive income (loss) before reclassifications, Accumulated Other Comprehensive (Loss) Income | (12,930) | 17,791 | (37,314)
Amounts reclassified from accumulated other comprehensive loss, Pension Plans and Other Postretirement Benefits | 2,514 | 777 | 1,992
Amounts reclassified from accumulated other comprehensive loss, Foreign Currency Translation Adjustments | 0 | 0 | 0
Amounts reclassified from accumulated other comprehensive loss, Accumulated Other Comprehensive (Loss) Income | 2,514 | 777 | 1,992
Total pension plans and other postretirement benefits | (22,976) | 16,760 | (23,035)
Foreign Currency Translation Adjustments, Other comprehensive income (loss) | 12,560 | 1,808 | (12,287)
Other comprehensive income (loss) | (10,416) | 18,568 | (35,322)
Pension Plans and Other Postretirement Benefits, Ending Balance | (92,771) | (69,795) | (86,555)
Foreign Currency Translation Adjustments, Ending Balance | (80,393) | (92,953) | (94,761)
Accumulated Other Comprehensive (Loss) Income, Ending Balance | $ (173,164) | $ (162,748) | $ (181,316)

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- Definition Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 5A -URI http://asc.fasb.org/extlink&oid=116690757&loc=SL116692626-108610 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 + Details
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