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Inventories
6 Months Ended
Jun. 30, 2018
Inventories [Abstract]  
Inventories
Note 7.
Inventories

Inventories, which are stated at the lower of cost (determined by means of the first-in, first-out method) or market, consist of the following:

  
June 30,
2018
  
December 31,
2017
 
  
(In thousands)
 
    
Finished goods
 
$
218,000
  
$
209,800
 
Work in process
  
9,029
   
7,536
 
Raw materials
  
104,424
   
109,075
 
Subtotal
  
331,453
   
326,411
 
Unreturned customer inventories (1)
  
18,246
   
 
Total inventories
 
$
349,699
  
$
326,411
 

(1)
The adoption of ASU 2014-09 using the modified retrospective method resulted in the recording of unreturned customer inventories commencing on January 1, 2018, see Note 2, “Summary of Significant Accounting Policies” for additional information.