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Derivatives and Hedging (Fair Value Amounts of Derivative Instruments) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Designated as Hedging Instrument [Member]
   
Derivative [Line Items]    
Derivatives in Asset Positions Fair value $ 0 $ 658
Derivatives in Liability Positions Fair value 0 (1,723)
Designated as Hedging Instrument [Member] | Interest rate contracts
   
Derivative [Line Items]    
Derivatives in Asset Positions Fair value 0 0
Derivatives in Liability Positions Fair value 0 0
Designated as Hedging Instrument [Member] | Foreign exchange contracts
   
Derivative [Line Items]    
Derivatives in Asset Positions Fair value 0 658
Derivatives in Liability Positions Fair value 0 (1,723)
Not Designated as Hedging Instrument [Member]
   
Derivative [Line Items]    
Derivatives in Asset Positions Fair value 833 6,147
Derivatives in Liability Positions Fair value (12,911) (2,492)
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts
   
Derivative [Line Items]    
Derivatives in Asset Positions Fair value 833 5,489
Derivatives in Liability Positions Fair value $ (12,911) $ (769)