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Financial Instruments (Summary Of Location And Fair Value Of Derivative Financial Instruments) (Details) (Designated as Hedging Instrument, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Foreign Currency Forward Contracts | Prepaid Expenses And Other
   
Derivatives, Fair Value [Line Items]    
Asset derivatives $ 47 $ 948
Net asset (liability) 47 948
Aluminum Futures Contracts | Prepaid Expenses And Other
   
Derivatives, Fair Value [Line Items]    
Asset derivatives   226
Liability derivatives: Aluminum futures contracts   88
Net asset (liability)   138
Aluminum Futures Contracts | Accrued Expenses
   
Derivatives, Fair Value [Line Items]    
Asset derivatives 31  
Liability derivatives: Aluminum futures contracts 178  
Net asset (liability) $ (147)