Allowance For Loan Losses (Schedule Of Aging Analysis Of Accruing And Non-Accruing Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 2,664,431	$ 2,626,094
Financing Receivable, Acquired with Deteriorated Credit Quality, Recorded Investment, Past Due	1,493	1,270
Non-accrual	21,407	15,306
Gross loans	2,696,438	2,652,066
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,349,551	1,286,306
Non-accrual	3,012	2,394
Gross loans	1,358,083	1,294,576
Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	144,032	144,788
Non-accrual	159	68
Gross loans	144,748	145,604
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	117,710	138,980
Financing Receivable, Acquired with Deteriorated Credit Quality, Recorded Investment, Past Due	0	0
Non-accrual	6,430	1,115
Gross loans	124,495	140,548
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,013,676	1,014,251
Financing Receivable, Acquired with Deteriorated Credit Quality, Recorded Investment, Past Due	1,493	1,270
Non-accrual	11,806	11,729
Gross loans	1,029,103	1,028,831
Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	36,534	39,286
Non-accrual	0	0
Gross loans	36,751	39,705
Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,928	2,483
Non-accrual	0	0
Gross loans	3,258	2,802
Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,451,479	2,376,849
Non-accrual	16,064	9,735
Gross loans	2,474,507	2,393,798
Originated Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,274,236	1,200,177
Non-accrual	2,186	2,259
Gross loans	1,281,234	1,207,598
Originated Loans [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	142,805	142,624
Non-accrual	159	68
Gross loans	143,511	143,438
Originated Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	110,475	128,857
Non-accrual	6,065	78
Gross loans	116,545	129,245
Originated Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	888,458	869,530
Non-accrual	7,654	7,330
Gross loans	897,294	877,339
Originated Loans [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	32,577	33,178
Non-accrual	0	0
Gross loans	32,665	33,376
Originated Loans [Member] | Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,928	2,483
Non-accrual	0	0
Gross loans	3,258	2,802
Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	212,952	249,245
Financing Receivable, Acquired with Deteriorated Credit Quality, Recorded Investment, Past Due	1,493	1,270
Non-accrual	5,343	5,571
Gross loans	221,931	258,268
Acquired Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	75,315	86,129
Non-accrual	826	135
Gross loans	76,849	86,978
Acquired Loans [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,227	2,164
Non-accrual	0	0
Gross loans	1,237	2,166
Acquired Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	7,235	10,123
Financing Receivable, Acquired with Deteriorated Credit Quality, Recorded Investment, Past Due	0	0
Non-accrual	365	1,037
Gross loans	7,950	11,303
Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	125,218	144,721
Financing Receivable, Acquired with Deteriorated Credit Quality, Recorded Investment, Past Due	1,493	1,270
Non-accrual	4,152	4,399
Gross loans	131,809	151,492
Acquired Loans [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,957	6,108
Non-accrual	0	0
Gross loans	4,086	6,329
Acquired Loans [Member] | Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	0	0
Non-accrual	0	0
Gross loans	0	0
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	7,524	7,734
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	4,764	4,949
Financing Receivables, 30 to 59 Days Past Due [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	474	563
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	336	243
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,418	1,371
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	202	291
Financing Receivables, 30 to 59 Days Past Due [Member] | Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	330	317
Financing Receivables, 30 to 59 Days Past Due [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	5,814	5,811
Financing Receivables, 30 to 59 Days Past Due [Member] | Originated Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	4,218	4,235
Financing Receivables, 30 to 59 Days Past Due [Member] | Originated Loans [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	464	561
Financing Receivables, 30 to 59 Days Past Due [Member] | Originated Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	100
Financing Receivables, 30 to 59 Days Past Due [Member] | Originated Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	717	479
Financing Receivables, 30 to 59 Days Past Due [Member] | Originated Loans [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	85	119
Financing Receivables, 30 to 59 Days Past Due [Member] | Originated Loans [Member] | Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	330	317
Financing Receivables, 30 to 59 Days Past Due [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,710	1,923
Financing Receivables, 30 to 59 Days Past Due [Member] | Acquired Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	546	714
Financing Receivables, 30 to 59 Days Past Due [Member] | Acquired Loans [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	10	2
Financing Receivables, 30 to 59 Days Past Due [Member] | Acquired Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	336	143
Financing Receivables, 30 to 59 Days Past Due [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	701	892
Financing Receivables, 30 to 59 Days Past Due [Member] | Acquired Loans [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	117	172
Financing Receivables, 30 to 59 Days Past Due [Member] | Acquired Loans [Member] | Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,134	1,239
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	548	758
Financing Receivables, 60 to 89 Days Past Due [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	67	155
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	19	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	485	210
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	15	114
Financing Receivables, 60 to 89 Days Past Due [Member] | Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	2
Financing Receivables, 60 to 89 Days Past Due [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	701	993
Financing Receivables, 60 to 89 Days Past Due [Member] | Originated Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	386	758
Financing Receivables, 60 to 89 Days Past Due [Member] | Originated Loans [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	67	155
Financing Receivables, 60 to 89 Days Past Due [Member] | Originated Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	5	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Originated Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	240	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Originated Loans [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	3	78
Financing Receivables, 60 to 89 Days Past Due [Member] | Originated Loans [Member] | Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	2
Financing Receivables, 60 to 89 Days Past Due [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	433	246
Financing Receivables, 60 to 89 Days Past Due [Member] | Acquired Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	162	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Acquired Loans [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Acquired Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	14	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	245	210
Financing Receivables, 60 to 89 Days Past Due [Member] | Acquired Loans [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	12	36
Financing Receivables, 60 to 89 Days Past Due [Member] | Acquired Loans [Member] | Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	449	423
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	208	169
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	16	30
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	210
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	225	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	14
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	449	410
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Originated Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	208	169
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Originated Loans [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	16	30
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Originated Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	210
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Originated Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	225	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Originated Loans [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	1
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Originated Loans [Member] | Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	13
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Acquired Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Acquired Loans [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Acquired Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Acquired Loans [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	13
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Acquired Loans [Member] | Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 0	$ 0