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Goodwill And Intangible Assets (Intangible Assets Subject To Amortization) (Details) (USD $)
In Thousands
3 Months Ended9 Months Ended
Oct. 01, 2011
Oct. 02, 2010
Oct. 01, 2011
Oct. 02, 2010
Finite-Lived Intangible Assets [Line Items]    
Intangible assets subject to amortization, beginning balance  $ 220,237 
Intangible assets recognized during the period5,181 5,181 
Amortization during the period(17,746)(16,996)(53,120)(51,976)
Currency translation during the period  3,010 
Intangible assets subject to amortization, ending balance175,308 175,308 
Customer Relationships [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets subject to amortization, beginning balance  106,432 
Intangible assets recognized during the period5,181 5,181 
Amortization during the period  (35,748) 
Currency translation during the period  1,328 
Intangible assets subject to amortization, ending balance77,193 77,193 
Patents [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets subject to amortization, beginning balance  112,520 
Amortization during the period  (17,281) 
Currency translation during the period  1,678 
Intangible assets subject to amortization, ending balance96,917 96,917 
Other [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets subject to amortization, beginning balance  1,285 
Amortization during the period  (91) 
Currency translation during the period  4 
Intangible assets subject to amortization, ending balance$ 1,198 $ 1,198