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INVENTORIES (Tables)
6 Months Ended
Jun. 30, 2013
INVENTORIES  
Schedule of inventories
 
(in thousands)
 
June 30,
2013
   
December 31,
2012
 
Raw materials and supplies
  $ 18,848     $ 17,205  
Work in process
    6,806       6,597  
Finished goods
    3,656       4,357  
Total inventories
  $ 29,310     $ 28,159