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Inventories (Tables)
6 Months Ended
Jun. 30, 2016
Inventories [Abstract]  
Schedule of Inventory, Current [Table Text Block]
Inventories consist of the following:
 
(In thousands)
 
June 30,
2016
 
December 31,
2015
 
 
 
 
 
 
 
 
 
Raw materials and component parts
 
$
39,065
 
$
30,569
 
Finished goods
 
 
85,189
 
 
67,777
 
 
 
 
 
 
 
 
 
 
 
$
124,254
 
$
98,346