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Segment Reporting (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Segment Reporting [Abstract]        
Number of operating segments     4  
Number of reportable segments     1  
Revenues from External Customers        
Net Sales $ 202,643 $ 188,541 $ 605,706 $ 556,871
Americas
       
Revenues from External Customers        
Net Sales 142,149 130,037 418,236 382,877
Europe, Middle East and Africa
       
Revenues from External Customers        
Net Sales 40,610 37,436 124,946 116,465
Asia Pacific
       
Revenues from External Customers        
Net Sales $ 19,884 $ 21,068 $ 62,524 $ 57,529