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Derivatives And Hedging (Schedule Of Interest Rate Contracts Reported At Fair Value) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Derivatives, Fair Value [Line Items]    
Derivative assets $ 8,938 $ 9,926
Derivative liabilities 2,874 768
Other Assets, Net [Member] | Interest Rate Contracts [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative assets 8,938 9,926
Other Liabilities, Net [Member] | Interest Rate Contracts [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative liabilities $ 2,874 $ 768