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Inventories (Tables)
 3 Months Ended
Mar. 29, 2020
Inventory Disclosure [Abstract]  
Summary of Inventories
Inventories consisted of the following:

(in thousands)
March 29, 2020December 29, 2019
Finished products
$153,803  $142,363  
Manufacturing materials
40,359  45,267  
Plastic shells, plastic pallets and other inventories
34,462  38,296  
Total inventories
$228,624  $225,926