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Inventories
3 Months Ended
Mar. 31, 2016
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories are comprised of the following: 
 
As of
December 31, 2015
 
As of
 March 31, 2016
 
(Dollars in thousands)
Inventories:
 
 
 
Raw materials and supplies
$
80,408

 
$
73,557

Work in process
136,858

 
133,612

Finished goods
78,196

 
75,101

         Total
$
295,462

 
$
282,270


Due to decreased pricing in our graphite electrode product line we recorded a lower of cost or market inventory adjustment of $11.5 million in the three months ended March 31, 2016.