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Unaudited Condensed Consolidated Statements of Partners' Equity (Parenthetical) - USD ($)
9 Months Ended
Sep. 23, 2018
Sep. 24, 2017
Statement of Partners' Capital [Abstract]    
Foreign currency translation adjustment, tax $ 1,247,000 $ 0
Unrealized loss on cash flow hedging derivatives, tax (845,000) (1,113,000)
Distribution Made to Limited Partner, Cash Distributions Paid $ 2.67 $ 2.565