Allowance For Loan Losses (Schedule Of Aging Analysis Of Accruing And Non-Accruing Loans) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 2,518,534	$ 2,114,206
30 - 59 days past due	8,882	8,374
60 - 89 days past due	1,337	1,574
Over 90 days past due	418	280
Impaired Financing Receivable, Recorded Investment, Past Due	7,750	2,741
Non-accrual	21,535	19,194
Total	2,558,456	2,146,369
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,179,469	1,023,633
30 - 59 days past due	5,332	4,910
60 - 89 days past due	815	599
Over 90 days past due	299	239
Non-accrual	2,926	2,054
Total	1,188,841	1,031,435
Home equity - junior liens (including lines of credit) [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	140,025	139,105
30 - 59 days past due	739	2,379
60 - 89 days past due	5	477
Over 90 days past due	11	37
Non-accrual	107	1,112
Total	140,887	143,110
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	148,360	107,141
30 - 59 days past due	207	260
60 - 89 days past due	40	236
Over 90 days past due	59	0
Impaired Financing Receivable, Recorded Investment, Past Due	1,865	1,004
Non-accrual	654	98
Total	151,185	108,739
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	996,494	803,614
30 - 59 days past due	1,669	442
60 - 89 days past due	382	246
Over 90 days past due	0	1
Impaired Financing Receivable, Recorded Investment, Past Due	5,885	1,737
Non-accrual	17,848	15,930
Total	1,022,278	821,970
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	49,958	36,443
30 - 59 days past due	665	113
60 - 89 days past due	87	8
Over 90 days past due	47	0
Non-accrual	0	0
Total	50,757	36,564
DDA Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	4,228	4,270
30 - 59 days past due	270	270
60 - 89 days past due	8	8
Over 90 days past due	2	3
Non-accrual	0	0
Total	4,508	4,551
Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,194,324	2,051,784
30 - 59 days past due	5,969	8,365
60 - 89 days past due	923	1,527
Over 90 days past due	247	280
Non-accrual	16,236	19,194
Total	2,217,699	2,081,150
Originated Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,072,148	1,008,190
30 - 59 days past due	4,484	4,910
60 - 89 days past due	696	599
Over 90 days past due	234	239
Non-accrual	2,286	2,054
Total	1,079,848	1,015,992
Originated Loans [Member] | Home equity - junior liens (including lines of credit) [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	139,614	132,847
30 - 59 days past due	716	2,379
60 - 89 days past due	5	477
Over 90 days past due	11	37
Non-accrual	107	1,112
Total	140,453	136,852
Originated Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	127,856	105,989
30 - 59 days past due	5	260
60 - 89 days past due	0	236
Over 90 days past due	0	0
Non-accrual	303	98
Total	128,164	106,583
Originated Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	816,383	766,404
30 - 59 days past due	408	433
60 - 89 days past due	204	199
Over 90 days past due	0	1
Non-accrual	13,540	15,930
Total	830,535	782,967
Originated Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	34,095	34,084
30 - 59 days past due	86	113
60 - 89 days past due	10	8
Over 90 days past due	0	0
Non-accrual	0	0
Total	34,191	34,205
Originated Loans [Member] | DDA Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	4,228	4,270
30 - 59 days past due	270	270
60 - 89 days past due	8	8
Over 90 days past due	2	3
Non-accrual	0	0
Total	4,508	4,551
Acquired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	324,210	62,422
30 - 59 days past due	2,913	9
60 - 89 days past due	414	47
Over 90 days past due	171	0
Impaired Financing Receivable, Recorded Investment, Past Due	7,750	2,741
Non-accrual	5,299	0
Total	340,757	65,219
Acquired Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	107,321	15,443
30 - 59 days past due	848	0
60 - 89 days past due	119	0
Over 90 days past due	65	0
Non-accrual	640	0
Total	108,993	15,443
Acquired Loans [Member] | Home equity - junior liens (including lines of credit) [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	411	6,258
30 - 59 days past due	23	0
60 - 89 days past due	0	0
Over 90 days past due	0	0
Non-accrual	0	0
Total	434	6,258
Acquired Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	20,504	1,152
30 - 59 days past due	202	0
60 - 89 days past due	40	0
Over 90 days past due	59	0
Impaired Financing Receivable, Recorded Investment, Past Due	1,865	1,004
Non-accrual	351	0
Total	23,021	2,156
Acquired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	180,111	37,210
30 - 59 days past due	1,261	9
60 - 89 days past due	178	47
Over 90 days past due	0	0
Impaired Financing Receivable, Recorded Investment, Past Due	5,885	1,737
Non-accrual	4,308	0
Total	191,743	39,003
Acquired Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	15,863	2,359
30 - 59 days past due	579	0
60 - 89 days past due	77	0
Over 90 days past due	47	0
Non-accrual	0	0
Total	16,566	2,359
Acquired Loans [Member] | DDA 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