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INVENTORIES (Tables)
6 Months Ended
Jun. 30, 2012
Inventory Disclosure  
Schedule of Inventory
 
(in thousands)
 
June 30, 2012
   
December 31, 2011
 
Raw materials and supplies                                     
  $ 19,185     $ 15,892  
Work in process                        
    5,616       5,691  
Finished goods
    4,225       3,324  
Total inventories
  $ 29,026     $ 24,907