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Inventories
9 Months Ended
Sep. 30, 2014
Inventory Disclosure [Abstract]  
Inventories
2. Inventories

Approximately 59% and 56% of the inventories at September 30, 2014 and December 31, 2013, respectively, were valued on the LIFO method with the remaining inventories valued on the FIFO method. Inventories were comprised of the following:

 

     September 30,
2014
     December 31,
2013
 

Raw materials

   $ 17,418       $ 17,411   

Work-in-process

     25,398         29,322   

Finished goods

     9,224         5,894   

Supplies

     11,155         11,502   
  

 

 

    

 

 

 
   $ 63,195       $ 64,129