Credit Quality (Summary Of Impaired Or Restructured Loans) (Details) (USD $) In Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Commercial [Member] | With No Specific Allowance Recorded [Member]
Recorded Investment	$ 65,121	$ 70,832
Unpaid Principal Balance	85,778	95,725
Average Recorded Investment	63,828	81,394
Interest Income Recognized	55	98
Direct Installment [Member] | With No Specific Allowance Recorded [Member]
Recorded Investment	11,858	4,542
Unpaid Principal Balance	12,172	4,669
Average Recorded Investment	11,689	5,613
Interest Income Recognized	132	77
Residential Mortgages [Member] | With No Specific Allowance Recorded [Member]
Recorded Investment	13,825	8,032
Unpaid Principal Balance	14,182	8,055
Average Recorded Investment	14,297	8,233
Interest Income Recognized	142	260
Indirect Installment [Member] | With No Specific Allowance Recorded [Member]
Recorded Investment	980	750
Unpaid Principal Balance	1,039	1,930
Average Recorded Investment	865	833
Interest Income Recognized	4
Consumer Lines Of Credit [Member] | With No Specific Allowance Recorded [Member]
Recorded Investment	1,068	589
Unpaid Principal Balance	1,070	604
Average Recorded Investment	1,137	584
Interest Income Recognized	4
Commercial Leases [Member] | With No Specific Allowance Recorded [Member]
Recorded Investment	740	979
Unpaid Principal Balance	740	979
Average Recorded Investment	912	749
Commercial [Member] | With A Specific Allowance Recorded [Member]
Recorded Investment	33,627	37,532
Unpaid Principal Balance	33,765	39,250
Related Allowance	8,440	10,313
Average Recorded Investment	35,460	38,070
Interest Income Recognized	22
Direct Installment [Member] | With A Specific Allowance Recorded [Member]
Recorded Investment		6,262
Unpaid Principal Balance		6,340
Related Allowance		626
Average Recorded Investment		4,503
Interest Income Recognized		275
Residential Mortgages [Member] | With A Specific Allowance Recorded [Member]
Recorded Investment		5,568
Unpaid Principal Balance		5,568
Related Allowance		557
Average Recorded Investment		4,252
Interest Income Recognized		246
Consumer Lines Of Credit [Member] | With A Specific Allowance Recorded [Member]
Recorded Investment		217
Unpaid Principal Balance		217
Related Allowance		22
Average Recorded Investment		138
Interest Income Recognized		9
Commercial [Member]
Recorded Investment	98,748	108,364
Unpaid Principal Balance	119,543	134,975
Related Allowance	8,440	10,313
Average Recorded Investment	99,288	119,464
Interest Income Recognized	77	98
Direct Installment [Member]
Recorded Investment	11,858	10,804
Unpaid Principal Balance	12,172	11,009
Related Allowance		626
Average Recorded Investment	11,689	10,116
Interest Income Recognized	132	352
Residential Mortgages [Member]
Recorded Investment	13,825	13,600
Unpaid Principal Balance	14,182	13,623
Related Allowance		557
Average Recorded Investment	14,297	12,485
Interest Income Recognized	142	506
Indirect Installment [Member]
Recorded Investment	980	750
Unpaid Principal Balance	1,039	1,930
Average Recorded Investment	865	833
Interest Income Recognized	4
Consumer Lines Of Credit [Member]
Recorded Investment	1,068	806
Unpaid Principal Balance	1,070	821
Related Allowance		22
Average Recorded Investment	1,137	722
Interest Income Recognized	4	9
Commercial Leases [Member]
Recorded Investment	740	979
Unpaid Principal Balance	740	979
Average Recorded Investment	$ 912	$ 749