Allowance For Loan Losses And Credit Quality (Schedule Of Investment In Impaired Loan) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011		Dec. 31, 2011
Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 4,803				$ 4,763
Unpaid Principal Balance	4,981				4,910
Related Allowance	(178)				(147)
Average Recorded Investment	5,389		7,056
Interest Income Recognized			13	[1]
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	40,454				40,140
Unpaid Principal Balance	42,247				42,193
Related Allowance	(1,793)				(2,053)
Average Recorded Investment	43,440		46,395
Interest Income Recognized	33	[1]	153	[1]
Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	8,019				6,812
Unpaid Principal Balance	8,106				6,889
Related Allowance	(87)				(77)
Average Recorded Investment	8,608		8,226
Interest Income Recognized			16	[1]
With No Related Allowance Recorded [Member] | Real Estate [Member] | Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	31,568				32,267
Unpaid Principal Balance	31,568				32,267
Average Recorded Investment	32,007		26,440
Interest Income Recognized			113	[1]
With No Related Allowance Recorded [Member] | Business [Member] | Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	6,519				6,403
Unpaid Principal Balance	6,519				6,403
Average Recorded Investment	6,530		2,154
Interest Income Recognized			5	[1]
With An Allowance Recorded [Member] | Residential - Prime [Member] | Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,803				4,763
Unpaid Principal Balance	4,981				4,910
Related Allowance	(178)				(147)
Average Recorded Investment	5,389		7,056
Interest Income Recognized			13	[1]
With An Allowance Recorded [Member] | Real Estate [Member] | Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,327				1,430
Unpaid Principal Balance	3,917				3,304
Related Allowance	(1,590)				(1,874)
Average Recorded Investment	4,657		17,792
Interest Income Recognized	32	[1]	35	[1]
With An Allowance Recorded [Member] | Business [Member] | Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	40				40
Unpaid Principal Balance	243				219
Related Allowance	(203)				(179)
Average Recorded Investment	246		9
Interest Income Recognized	1	[1]
With An Allowance Recorded [Member] | Indirect Automobile [Member] | Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	855				987
Unpaid Principal Balance	861				994
Related Allowance	(6)				(7)
Average Recorded Investment	862		1,057
Interest Income Recognized			3	[1]
With An Allowance Recorded [Member] | Credit Card [Member] | Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	395				391
Unpaid Principal Balance	408				403
Related Allowance	(13)				(12)
Average Recorded Investment	423		393
With An Allowance Recorded [Member] | Home Equity [Member] | Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	6,236				4,826
Unpaid Principal Balance	6,296				4,873
Related Allowance	(60)				(47)
Average Recorded Investment	6,575		5,451
Interest Income Recognized			10	[1]
With An Allowance Recorded [Member] | Consumer - Other [Member] | Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	533				608
Unpaid Principal Balance	541				619
Related Allowance	(8)				(11)
Average Recorded Investment	748		1,324
Interest Income Recognized			$ 3	[1]

[1] Interest income recognized on impaired loans represents income recognized before loans were placed on nonaccrual status.