v2.3.0.15
INVENTORY AND LONG-TERM PARTS INVENTORY (Tables)
9 Months Ended
Sep. 30, 2011
INVENTORY AND LONG-TERM PARTS INVENTORY 
Summary of inventory
 
  September 30, 2011   December 31, 2010  

Finished goods product inventory

  $ 30,324   $ 24,398  

In-process mineral inventory

    8,983     11,160  

Current parts inventory

    14,113     12,536  
           
 

Total current inventory

    53,420     48,094  

Long-term parts inventory

    8,791     7,121  
           
 

Total inventory

  $ 62,211   $ 55,215