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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 and component parts       $ 28,664     $ 36,383  
Finished goods   78,327       65,943  
                 
    $ 106,991     $ 102,326