Derivative Financial Instruments (Schedule Of Amounts Related To Non-Hedging Interest Rate And Commodity Derivatives) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Derivative Financial Instruments [Abstract]
Other non-interest income, Non-hedging interest rate derivatives	$ 90	$ 410	$ 826	$ 2,004
Other non-interest expense, Non-hedging interest rate derivatives	79	34	(49)	112
Other non-interest income, Non-hedging commodity derivatives	82	80	544	126
Other non-interest income, Non-hedging foreign exchange derivatives	$ 113	$ 1	$ 232	$ 2