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Inventories
6 Months Ended
Jun. 30, 2018
Inventory, Net [Abstract]  
Inventories
The components of inventories are as follows:
 
 
June 30,
 
December 31,
(In thousands)
2018
 
2017
Finished goods
$
23,986

 
$
20,281

Work-in-process
12,420

 
11,958

Raw materials
29,591

 
35,909

Stores, supplies and other
18,893

 
18,759

Total
$
84,890

 
$
86,907