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Derivative Financial Instruments (Summary Of Location And Amounts Of Derivative Fair Values In The Consolidated Balance Sheets) (Details) (USD $)
In Thousands
Sep. 30, 2011
Dec. 31, 2010
Derivatives, Fair Value [Line Items]  
Asset Derivatives, Total derivatives$ 6$ 4,240
Liability Derivatives, Total derivatives(1,973)(5,818)
Designated As Hedging Instrument [Member] | Interest Rate Contract [Member] | Other Assets [Member]
  
Derivatives, Fair Value [Line Items]  
Asset Derivatives, Total derivatives04,240
Liability Derivatives, Total derivatives(829)(1,139)
Not Designated As Hedging Instruments [Member]
  
Derivatives, Fair Value [Line Items]  
Asset Derivatives, Total derivatives60
Liability Derivatives, Total derivatives(1,144)(4,679)
Not Designated As Hedging Instruments [Member] | Interest Rate Contract [Member] | Other Liabilities [Member]
  
Derivatives, Fair Value [Line Items]  
Asset Derivatives, Total derivatives00
Liability Derivatives, Total derivatives(519)(1,903)
Not Designated As Hedging Instruments [Member] | Equity Contracts [Member] | Other Liabilities [Member]
  
Derivatives, Fair Value [Line Items]  
Asset Derivatives, Total derivatives60
Liability Derivatives, Total derivatives$ (625)$ (2,776)