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Segment Reporting (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net Sales $ 178,268 $ 186,990 $ 551,473 $ 560,839
Americas [Member]
       
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net Sales 118,624 121,280 365,726 358,912
Europe, Middle East, Africa [Member]
       
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net Sales 38,355 44,599 125,573 139,591
Asia Pacific [Member]
       
Revenues from External Customers and Long-Lived Assets [Line Items]        
Net Sales $ 21,289 $ 21,111 $ 60,174 $ 62,336