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Inventories (Tables)
 3 Months Ended
Apr. 02, 2021
Inventory Disclosure [Abstract]  
Summary of Inventories
Inventories consisted of the following:

(in thousands)
April 2, 2021December 31, 2020
Finished products
$166,978 $140,080 
Manufacturing materials
50,045 47,081 
Plastic shells, plastic pallets and other inventories
40,340 38,596 
Total inventories
$257,363 $225,757