Derivative Financial Instruments (Schedule Of Amounts Related To Interest Rate Derivatives Designated As Hedges Of Fair Value) (Details) (Commercial Loan/Lease Interest Rate Swaps [Member], USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Commercial Loan/Lease Interest Rate Swaps [Member]
Amount of gain (loss) included in interest income on loans	$ (874)	$ (1,241)	$ (2,848)	$ (3,975)
Amount of (gain) loss included in other non-interest expense	$ (7)	$ (21)	$ (10)	$ (112)