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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Inventory, Net of Reserves
Inventories are classified as follows (in thousands):
 
 
  
December 31,
 
2020
 
  
December 31,
 
2019
 
Raw materials
  
$
133,490
 
  
$
126,850
 
Work in progress
  
 
18,678
 
  
 
15,457
 
Finished goods
  
 
152,113
 
  
 
178,244
 
    
 
 
    
 
 
 
Total inventories
  
$
304,281
 
  
$
320,551