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Derivatives And Hedging (Interest Rate Contracts Reported At Their Fair Values) (Details) (USD $)
In Thousands
Jun. 30, 2011
Dec. 31, 2010
Other Assets, net [Member]
   
Interest rate contract designated as hedge, assets $ 7,703 $ 7,192
Other Liabilities, net [Member]
   
Interest rate contract designated as hedge, liabilities $ 177 $ 108