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Derivatives And Hedging (Interest Rate Contracts Reported At Their Fair Values) (Details) (USD $)
In Thousands
Sep. 30, 2011
Dec. 31, 2010
Other Assets, Net [Member]
  
Derivatives And Hedging [Line Items]  
Interest rate contract designated as hedge, assets$ 11,200$ 7,192
Other Liabilities, Net [Member]
  
Derivatives And Hedging [Line Items]  
Interest rate contract designated as hedge, liabilities$ 655$ 108