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Inventories (Tables)
 9 Months Ended
Oct. 01, 2021
Inventory Disclosure [Abstract]  
Summary of Inventories
Inventories consisted of the following:

(in thousands)October 1, 2021December 31, 2020
Finished products
$142,715 $140,080 
Manufacturing materials
55,296 47,081 
Plastic shells, plastic pallets and other inventories
42,484 38,596 
Total inventories
$240,495 $225,757