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Basis of Presentation and General Information (Components of Other Intangible Assets, Included In Other Assets) (Details) - USD ($)
$ in Thousands
Dec. 27, 2019
Dec. 28, 2018
Finite Lived Intangible Assets Net [Abstract]    
Gross carrying amount $ 27,269 $ 27,269
Accumulated amortization (25,274) (24,238)
Foreign currency translation adjustment 121 59
Intangible Assets, net $ 2,116 $ 3,090