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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 26, 2018 | Sep. 27, 2017 | Sep. 26, 2018 | Sep. 27, 2017
Statement of Comprehensive Income [Abstract] |  |  |  |
Minimum pension liability adjustment, tax | $ (7) | $ (9) | $ (20) | $ (27)
Unrealized gain (loss) on hedge transactions, tax | $ 1,583 | $ 133 | $ 1,673 | $ (1,249)

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- Definition Amount, after 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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