Allowance For Loan Losses (Schedule Of Aging Analysis Of Accruing And Non-Accruing Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 2,659,253	$ 2,626,094
Financing Receivable, Acquired with Deteriorated Credit Quality, Recorded Investment, Past Due	1,847	1,270
Non-accrual	15,623	15,306
Gross loans	2,684,457	2,652,066
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,317,489	1,286,306
Non-accrual	2,693	2,394
Gross loans	1,325,453	1,294,576
Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	143,233	144,788
Non-accrual	141	68
Gross loans	143,772	145,604
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	140,180	138,980
Financing Receivable, Acquired with Deteriorated Credit Quality, Recorded Investment, Past Due	0	0
Non-accrual	1,271	1,115
Gross loans	142,065	140,548
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,018,099	1,014,251
Financing Receivable, Acquired with Deteriorated Credit Quality, Recorded Investment, Past Due	1,847	1,270
Non-accrual	11,518	11,729
Gross loans	1,032,333	1,028,831
Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	37,299	39,286
Non-accrual	0	0
Gross loans	37,555	39,705
Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,953	2,483
Non-accrual	0	0
Gross loans	3,279	2,802
Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,434,712	2,376,849
Non-accrual	10,616	9,735
Gross loans	2,451,373	2,393,798
Originated Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,239,489	1,200,177
Non-accrual	2,058	2,259
Gross loans	1,245,655	1,207,598
Originated Loans [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	141,749	142,624
Non-accrual	141	68
Gross loans	142,283	143,438
Originated Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	130,860	128,857
Non-accrual	829	78
Gross loans	132,289	129,245
Originated Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	886,952	869,530
Non-accrual	7,588	7,330
Gross loans	895,076	877,339
Originated Loans [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	32,709	33,178
Non-accrual	0	0
Gross loans	32,791	33,376
Originated Loans [Member] | Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,953	2,483
Non-accrual	0	0
Gross loans	3,279	2,802
Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	224,541	249,245
Financing Receivable, Acquired with Deteriorated Credit Quality, Recorded Investment, Past Due	1,847	1,270
Non-accrual	5,007	5,571
Gross loans	233,084	258,268
Acquired Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	78,000	86,129
Non-accrual	635	135
Gross loans	79,798	86,978
Acquired Loans [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,484	2,164
Non-accrual	0	0
Gross loans	1,489	2,166
Acquired Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	9,320	10,123
Financing Receivable, Acquired with Deteriorated Credit Quality, Recorded Investment, Past Due	0	0
Non-accrual	442	1,037
Gross loans	9,776	11,303
Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	131,147	144,721
Financing Receivable, Acquired with Deteriorated Credit Quality, Recorded Investment, Past Due	1,847	1,270
Non-accrual	3,930	4,399
Gross loans	137,257	151,492
Acquired Loans [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	4,590	6,108
Non-accrual	0	0
Gross loans	4,764	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	6,673	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	4,476	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	394	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	569	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	716	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	192	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	326	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	5,449	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	3,653	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	389	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	555	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	467	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	59	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	326	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	1,224	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	823	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	5	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	14	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	249	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	133	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	797	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	584	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	1	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	45	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	153	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	14	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	363	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	244	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	1	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	45	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	69	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	4	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	434	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	340	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	0	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	84	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	10	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	264	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	211	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	3	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	0	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	50	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	233	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	211	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	3	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	0	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	19	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	31	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	31	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