Allowance For Credit Losses (Age Analysis of Past Due Loans Receivables) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 59 Days Past Due	$ 1,178	$ 1,139
60 to 89 Days Past Due	90	54
Greater than 90 Days	7,490	4,851
Total Past Due	8,758	6,044
Current	393,619	397,640
Loans and Leases, Total	402,377	403,684	411,374
Loans Receivable >90 Days and Accruing	2,721	210
Residential mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 59 Days Past Due	963	692
Greater than 90 Days	2,261	1,873
Total Past Due	3,224	2,565
Current	22,634	23,896
Loans and Leases, Total	25,858	26,461	26,975
Loans Receivable >90 Days and Accruing	60
Commercial mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 59 Days Past Due	75	257
Greater than 90 Days	2,805	2,324
Total Past Due	2,880	2,581
Current	237,308	229,716
Loans and Leases, Total	240,188	232,297
Loans Receivable >90 Days and Accruing	2,485	210
Commercial term [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
60 to 89 Days Past Due		54
Greater than 90 Days	65	200
Total Past Due	65	254
Current	79,798	76,048
Loans and Leases, Total	79,863	76,302
Commercial construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Greater than 90 Days	2,031	312
Total Past Due	2,031	312
Current	12,796	24,506
Loans and Leases, Total	14,827	24,818
Leases financing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Greater than 90 Days	33	61
Total Past Due	33	61
Current	29	130
Loans and Leases, Total	62	191	264
Consumer: Home equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 59 Days Past Due	33	175
Greater than 90 Days	212	60
Total Past Due	245	235
Current	34,129	35,807
Loans and Leases, Total	34,374	36,042
Loans Receivable >90 Days and Accruing	93
Consumer: Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 59 Days Past Due	107	15
60 to 89 Days Past Due	90
Greater than 90 Days	83	21
Total Past Due	280	36
Current	6,925	7,537
Loans and Leases, Total	7,205	7,573
Loans Receivable >90 Days and Accruing	$ 83