Loans (Recorded Investment By Loan Class In Current And Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 3,384	$ 3,808
60-89 Days Past Due	1,486	517
Greater Than 90 Days	8	8
Total Past Due	4,878	4,333
Nonaccrual	8,432	10,145
Current	2,039,290	1,866,593
Total loans	2,052,600	1,881,071	$ 1,802,105
Commercial Business [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	321	28
60-89 Days Past Due	612
Total Past Due	933	28
Nonaccrual	3,922	4,288
Current	308,620	263,061
Total loans	313,475	267,377	265,751
Commercial Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	68	83
60-89 Days Past Due	146
Total Past Due	214	83
Nonaccrual	947	3,020
Current	566,320	473,304
Total loans	567,481	476,407	470,312
Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	203	321
Total Past Due	203	321
Nonaccrual	1,325	1,194
Current	96,774	98,726
Total loans	98,302	100,241	113,101
Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	719	799
60-89 Days Past Due	429	67
Total Past Due	1,148	866
Nonaccrual	758	463
Current	400,581	378,445
Total loans	402,487	379,774	320,658
Consumer Indirect [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	1,975	2,429
60-89 Days Past Due	286	402
Total Past Due	2,261	2,831
Nonaccrual	1,467	1,169
Current	648,766	632,357
Total loans	652,494	636,357	609,390
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	98	148
60-89 Days Past Due	13	48
Greater Than 90 Days	8	8
Total Past Due	119	204
Nonaccrual	13	11
Current	18,229	20,700
Total loans	$ 18,361	$ 20,915	$ 22,893