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Inventories
3 Months Ended
Mar. 31, 2021
Inventories [Abstract]  
Inventories
Note 6.  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:

 
 
March 31,
2021
   
December 31,
2020
 
 
 
(In thousands)
 
Finished goods
 
$
259,847
   
$
225,523
 
Work in process
   
11,639
     
10,711
 
Raw materials
   
119,410
     
109,268
 
Subtotal
   
390,896
     
345,502
 
Unreturned customer inventories
   
21,088
     
19,632
 
Total inventories
 
$
411,984
   
$
365,134