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Accumulated Other Comprehensive Loss (Components of AOCI) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | $ (654,186) | $ (561,206) | $ (579,196) | $ (569,430) |  |  |  |
Other comprehensive income (loss) before reclassifications | 14,335 | (2,142) | (63,055) | 4,595 |  |  |  |
Amounts reclassified from AOCL | 2,551 | 1,523 | 4,951 | 3,010 |  |  |  |
Other comprehensive income (loss) | 16,886 | (619) | (58,104) | 7,605 |  |  |  |
Ending balance | (637,300) | (561,825) | (637,300) | (561,825) |  |  |  |
Accumulated other comprehensive loss, accumulated net loss from net investment hedge | 4,000 | 3,000 | 12,500 | 15,200 |  |  |  |
Foreign currency translation items |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | (522,717) | (440,980) | (441,364) | (447,925) |  |  |  |
Other comprehensive income (loss) before reclassifications | 15,084 | (2,848) | (66,269) | 4,097 |  |  |  |
Amounts reclassified from AOCL | 0 | 0 | 0 | 0 |  |  |  |
Other comprehensive income (loss) | 15,084 | (2,848) | (66,269) | 4,097 |  |  |  |
Ending balance | (507,633) | (443,828) | (507,633) | (443,828) |  |  |  |
Pension and other post-retirement effects |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | (130,852) | (119,430) | (137,161) | (120,647) |  |  |  |
Other comprehensive income (loss) before reclassifications | (793) | 663 | 3,116 | 393 |  |  |  |
Amounts reclassified from AOCL | 2,551 | 1,523 | 4,951 | 3,010 |  |  |  |
Other comprehensive income (loss) | 1,758 | 2,186 | 8,067 | 3,403 |  |  |  |
Ending balance | (129,094) | (117,244) | (129,094) | (117,244) |  |  |  |
Cash flow hedging activity |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | (617) | (796) | (671) | (858) |  |  |  |
Other comprehensive income (loss) before reclassifications | 44 | 43 | 98 | 105 |  |  |  |
Amounts reclassified from AOCL | 0 | 0 | 0 | 0 |  |  |  |
Other comprehensive income (loss) | 44 | 43 | 98 | 105 |  |  |  |
Ending balance | (573) | (753) | (573) | (753) |  |  |  |
Noncontrolling Interests |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |  |  |
Other comprehensive income (loss) | (63) | (12) | 777 | 665 |  |  |  |
Accumulated other comprehensive income (loss), foreign currency translation adjustment, net of tax | $ 5,900 | $ 5,200 | $ 5,900 | $ 5,200 | $ 5,900 | $ (5,100) | $ 5,200 | $ (4,500)

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- Definition Accumulated Other Comprehensive Income (Loss), Including Portion Attributable to Noncontrolling Interest, Net of Tax + References No definition available. + Details
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- Definition Accumulated Other Comprehensive Income (Loss), accumulated Net Gain (Loss) from Net investment hedge + References No definition available. + Details
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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=118930883&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32022-110900 Reference 3: 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=118930883&loc=d3e681-108580 Reference 4: 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 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 6: 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=118930883&loc=SL7669646-108580 Reference 7: 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=118930883&loc=SL7669686-108580 + Details
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