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Inventories (Tables)
9 Months Ended
Sep. 30, 2015
Inventories [Abstract]  
Schedule of Inventories
(in thousands)  

September 30, 2015

 

December 31, 2014

Raw materials   $ 28,971     $ 27,006  
Work in process     45,253       43,512  
Finished goods     36,041       36,756  
 Total inventories   $ 110,265     $ 107,274