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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended
Mar. 28, 2018
Mar. 29, 2017
Statement of Comprehensive Income [Abstract]    
Minimum pension liability adjustment, tax $ 6 $ 9
Unrealized gain (loss) on hedge transactions, tax $ (1,085) $ (397)