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Inventories (Schedule Of Inventories) (Details) - USD ($)
$ in Thousands
Sep. 29, 2018
Dec. 30, 2017
Inventories [Abstract]    
Raw materials $ 22,066 $ 20,737
Work in progress 14,318 8,461
Finished goods 44,726 33,720
Inventories $ 81,110 $ 62,918