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INVENTORIES (Tables)
6 Months Ended
Jun. 30, 2015
INVENTORIES  
Schedule of inventories
(in thousands)  

June 30, 

2015 

    December 31, 2014  
Raw materials and supplies   $ 18,091     $ 16,996  
Work in process     7,569       6,602  
Finished goods     4,476       5,221  
Total inventories   $ 30,136     $ 28,819