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Inventories (Tables)
 9 Months Ended
Sep. 27, 2020
Inventory Disclosure [Abstract]  
Summary of Inventories
Inventories consisted of the following:

(in thousands)
September 27, 2020December 29, 2019
Finished products
$125,388 $142,363 
Manufacturing materials
45,425 45,267 
Plastic shells, plastic pallets and other inventories
36,960 38,296 
Total inventories
$207,773 $225,926