Derivative Financial Instruments (Summary Of Location And Amounts Of Derivative Fair Values In The Consolidated Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 0	$ 4,240
Liability Derivatives	(1,325)	(5,818)
Designated As Hedging Instrument [Member] | Interest Rate Contracts [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	0	4,240
Liability Derivatives	0	(1,139)
Not Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	0	0
Liability Derivatives	(1,325)	(4,679)
Not Designated As Hedging Instruments [Member] | Interest Rate Contracts [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	0	0
Liability Derivatives	(670)	(1,903)
Not Designated As Hedging Instruments [Member] | Equity Contracts [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	0	0
Liability Derivatives	$ (655)	$ (2,776)