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Net Inventories
12 Months Ended
Dec. 31, 2012
Net Inventories [Abstract]  
Net Inventories
(4)        Net Inventories

Inventories are stated at the lower of cost, determined on a first-in, first-out basis, or market.

Net inventories consist of the following:

   
December 31,
 
   
2012
  
2011
 
        
Finished goods
 $30,262  $26,885 
Work in process
  23,533   19,190 
Raw materials
  12,352   11,261 
Supplies
  5,074   4,759 
Total
 $71,221  $62,095 

The components of inventory stated above are net of reserves of $11,839 and $11,243 as of December 31, 2012 and 2011, respectively.