Derivative Financial Instruments (Summary Of Location And Amounts Of Derivative Fair Values In The Consolidated Balance Sheets) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Asset Derivatives, Total derivatives	$ 1,537	$ 4,240
Liability Derivatives, Total derivatives	(4,059)	(5,818)
Designated As Hedging Instrument [Member] | Interest Rate Contract [Member] | Other Assets [Member]
Asset Derivatives, Total derivatives	902	4,240
Liability Derivatives, Total derivatives	(970)	(1,139)
Not Designated As Hedging Instruments [Member]
Asset Derivatives, Total derivatives	635	0
Liability Derivatives, Total derivatives	(3,089)	(4,679)
Not Designated As Hedging Instruments [Member] | Interest Rate Contract [Member] | Other Liabilities [Member]
Asset Derivatives, Total derivatives	0	0
Liability Derivatives, Total derivatives	(1,040)	(1,903)
Not Designated As Hedging Instruments [Member] | Equity Contracts [Member] | Other Liabilities [Member]
Asset Derivatives, Total derivatives	635	0
Liability Derivatives, Total derivatives	$ (2,049)	$ (2,776)