Segment Reporting (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Segment Reporting [Abstract]    
Number of operating segments 4  
Number of reportable segments 1  
Revenues from External Customers    
Net Sales $ 185,740 $ 183,979
Americas    
Revenues from External Customers    
Net Sales 134,003 122,389
Europe, Middle East and Africa    
Revenues from External Customers    
Net Sales 34,647 43,064
Asia Pacific    
Revenues from External Customers    
Net Sales $ 17,090 $ 18,526