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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Statement of Comprehensive Income [Abstract] |  |  |
Foreign currency translation, tax | $ 157 | $ (29,448) | $ 10,977
Prior service cost recognized in net periodic cost, tax | (23) | (39) | (20)
Unamortized (loss) gain arising during the period, tax | (447) | 1,677 | 1,849
Plan amendments, tax | (137) | 74 | 0
Net loss recognized in net periodic cost, tax | (1,588) | (2,457) | (2,489)
Foreign currency translation, tax | (183) | 413 | (373)
Unrealized gain (loss) on derivatives arising during the period, tax | (268) | (631) | 1,359
Reclassification adjustment on derivatives included in net income, tax | $ 163 | $ 83 | $ (1,010)

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- Definition Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Pension and Other Postretirement Benefit Plans, Tax + References No definition available. + Details
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- Definition Amount, before reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e640-108580 + Details
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