Derivatives (Schedule Of Fair Value Of Derivative Instruments On The Balance Sheet) (Details) (Interest Rate Products [Member], USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Other Assets [Member] | Designated As Hedging Instrument [Member]
Derivative Asset, Fair Value, Gross Asset	$ 158
Other Assets [Member] | Not Designated As Hedging Instrument [Member]
Derivative Asset, Fair Value, Gross Asset	8,481	2,952
Other Liabilities [Member] | Designated As Hedging Instrument [Member]
Derivative Liability, Fair Value, Gross Liability
Other Liabilities [Member] | Not Designated As Hedging Instrument [Member]
Derivative Liability, Fair Value, Gross Liability	8,716	2,952
Designated As Hedging Instrument [Member]
Derivative Asset, Fair Value, Gross Asset	158
Derivative Liability, Fair Value, Gross Liability
Not Designated As Hedging Instrument [Member]
Derivative Asset, Fair Value, Gross Asset	8,481	2,952
Derivative Liability, Fair Value, Gross Liability	$ 8,716	$ 2,952