Derivative Instruments (Summary Of The Effects Of Derivative Instruments On Consolidated Statements Of Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total derivatives	$ 235	$ 151	$ 201	$ 341
Not Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative other non-interest income	81	167	198	556
Not Designated as Hedging Instrument [Member] | Interest Rate Caps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative other non-interest income	0	0	0	0
Not Designated as Hedging Instrument [Member] | Credit Risk Participation Agreements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative other non-interest income	7	29	5	35
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative other non-interest income	147	(11)	7	153
Not Designated as Hedging Instrument [Member] | Mortgage Loan Commitments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative loan fees and sales	0	(15)	(20)	29
Not Designated as Hedging Instrument [Member] | Mortgage Loan Forward Sale Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative loan fees and sales	0	(19)	11	(432)
Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total derivatives	57	(117)	145	70
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative interest and fees on loans	$ 57	$ (117)	$ 145	$ 70