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Inventories
9 Months Ended
Sep. 30, 2023
Inventory Disclosure [Abstract]  
Inventories
 
4 Inventories
Inventories are classified as follows (in thousands):
 
    
September 30, 2023
    
December 31, 2022
 
Raw materials
   $ 241,012      $ 205,760  
Work in progress
     25,689        19,899  
Finished goods
     277,701        230,051  
    
 
 
    
 
 
 
Total inventories
   $ 544,402      $ 455,710