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Inventories (Tables)
6 Months Ended
Jun. 30, 2022
Inventories [Abstract]  
Inventories
Inventories, which are stated at the lower of cost (determined by means of the first-in, first-out method) and net realizable value, consist of the following:

 
 
June 30,
2022
   
December 31,
2021
 
 
 
(In thousands)
 
Finished goods
 
$
345,200
   
$
296,739
 
Work in process
   
17,248
     
16,010
 
Raw materials
   
188,967
     
156,006
 
Subtotal
   
551,415
     
468,755
 
Unreturned customer inventories
   
21,405
     
22,268
 
Total inventories
 
$
572,820
   
$
491,023