Allowance For Loan Losses (Schedule Of Aging Analysis Of Accruing And Non-Accruing Loans) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 2,525,412	$ 2,564,342
30 - 59 days past due	6,597	10,453
60 - 89 days past due	1,271	1,071
Over 90 days past due	432	436
Impaired Financing Receivable, Recorded Investment, Past Due	2,729	7,534
Non-accrual	20,594	22,361
Total	2,557,035	2,606,197
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,208,432	1,198,700
30 - 59 days past due	4,096	4,965
60 - 89 days past due	717	667
Over 90 days past due	118	231
Non-accrual	1,422	2,587
Total	1,214,785	1,207,150
Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	141,201	142,232
30 - 59 days past due	570	880
60 - 89 days past due	59	0
Over 90 days past due	30	42
Non-accrual	69	236
Total	141,929	143,390
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	141,930	162,450
30 - 59 days past due	160	0
60 - 89 days past due	44	80
Over 90 days past due	0	0
Impaired Financing Receivable, Recorded Investment, Past Due	0	0
Non-accrual	1,974	1,954
Total	144,108	164,484
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	988,185	1,011,926
30 - 59 days past due	1,144	3,440
60 - 89 days past due	422	273
Over 90 days past due	283	109
Impaired Financing Receivable, Recorded Investment, Past Due	2,729	7,534
Non-accrual	17,129	17,584
Total	1,009,892	1,040,866
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	41,860	45,523
30 - 59 days past due	432	794
60 - 89 days past due	27	36
Over 90 days past due	1	49
Non-accrual	0	0
Total	42,320	46,402
Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,804	3,511
30 - 59 days past due	195	374
60 - 89 days past due	2	15
Over 90 days past due	0	5
Non-accrual	0	0
Total	4,001	3,905
Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,232,575	2,255,141
30 - 59 days past due	4,739	6,217
60 - 89 days past due	995	517
Over 90 days past due	148	282
Non-accrual	14,203	15,317
Total	2,252,660	2,277,474
Originated Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,108,719	1,096,911
30 - 59 days past due	3,328	4,123
60 - 89 days past due	672	495
Over 90 days past due	118	231
Non-accrual	1,188	1,905
Total	1,114,025	1,103,665
Originated Loans [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	141,097	141,967
30 - 59 days past due	552	880
60 - 89 days past due	56	0
Over 90 days past due	30	42
Non-accrual	69	236
Total	141,804	143,125
Originated Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	126,118	144,197
30 - 59 days past due	77	0
60 - 89 days past due	0	0
Over 90 days past due	0	0
Non-accrual	134	79
Total	126,329	144,276
Originated Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	821,681	835,908
30 - 59 days past due	534	668
60 - 89 days past due	255	0
Over 90 days past due	0	0
Non-accrual	12,812	13,097
Total	835,282	849,673
Originated Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	31,156	32,647
30 - 59 days past due	53	172
60 - 89 days past due	10	7
Over 90 days past due	0	4
Non-accrual	0	0
Total	31,219	32,830
Originated Loans [Member] | Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,804	3,511
30 - 59 days past due	195	374
60 - 89 days past due	2	15
Over 90 days past due	0	5
Non-accrual	0	0
Total	4,001	3,905
Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	292,837	309,201
30 - 59 days past due	1,858	4,236
60 - 89 days past due	276	554
Over 90 days past due	284	154
Impaired Financing Receivable, Recorded Investment, Past Due	2,729	7,534
Non-accrual	6,391	7,044
Total	304,375	328,723
Acquired Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	99,713	101,789
30 - 59 days past due	768	842
60 - 89 days past due	45	172
Over 90 days past due	0	0
Non-accrual	234	682
Total	100,760	103,485
Acquired Loans [Member] | Home equity - junior lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	104	265
30 - 59 days past due	18	0
60 - 89 days past due	3	0
Over 90 days past due	0	0
Non-accrual	0	0
Total	125	265
Acquired Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	15,812	18,253
30 - 59 days past due	83	0
60 - 89 days past due	44	80
Over 90 days past due	0	0
Impaired Financing Receivable, Recorded Investment, Past Due	0	0
Non-accrual	1,840	1,875
Total	17,779	20,208
Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	166,504	176,018
30 - 59 days past due	610	2,772
60 - 89 days past due	167	273
Over 90 days past due	283	109
Impaired Financing Receivable, Recorded Investment, Past Due	2,729	7,534
Non-accrual	4,317	4,487
Total	174,610	191,193
Acquired Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	10,704	12,876
30 - 59 days past due	379	622
60 - 89 days past due	17	29
Over 90 days past due	1	45
Non-accrual	0	0
Total	11,101	13,572
Acquired Loans [Member] | Demand Deposit Account Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	0	0
30 - 59 days past due	0	0
60 - 89 days past due	0	0
Over 90 days past due	0	0
Non-accrual	0	0
Total	$ 0	$ 0