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Inventories (Tables)
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventory, Net of Reserves
Inventories are classified as follows (in thousands):
 
December 31,
2019
 
 
December 31,
2018
 
Raw materials
  $
126,850
    $
111,641
 
Work in progress
   
15,457
     
15,552
 
Finished goods
   
178,244
     
164,376
 
                 
Total inventories
  $
320,551
    $
291,569