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Inventories
3 Months Ended
Apr. 02, 2022
Inventory Disclosure [Abstract]  
Inventories
4 Inventories
Inventories are classified as follows (in thousands):
 
    
April 2, 2022
    
December 31, 2021
 
Raw materials
   $ 168,324      $ 165,240  
Work in progress
     24,087        19,726  
Finished goods
     189,491        171,129  
    
 
 
    
 
 
 
Total inventories
   $ 381,902      $ 356,095