Loans and Allowance for Loan and Lease Losses (Details 3) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Loan portfolio aging analysis
30-59 Days Past Due	$ 6,119	$ 6,554
60-89 Days Past Due	461	973
90 Days and Greater	4,515	5,752
Total Past Due	11,095	13,279
Current	302,973	303,808
Total	314,068	317,087
Total Loans greater than 90 days and Accruing	233	252
Commercial Real estate loans [Member]
Loan portfolio aging analysis
30-59 Days Past Due	270
60-89 Days Past Due
90 Days and Greater	443
Total Past Due	713
Current	102,715	100,126
Total	103,428	100,126
Total Loans greater than 90 days and Accruing
Residential Real estate loans [Member]
Loan portfolio aging analysis
30-59 Days Past Due	3,415	1,204
60-89 Days Past Due	458	417
90 Days and Greater	3,008	4,398
Total Past Due	6,881	6,019
Current	157,998	158,401
Total	164,879	164,420
Total Loans greater than 90 days and Accruing	233	243
Construction Real estate loans [Member]
Loan portfolio aging analysis
30-59 Days Past Due	2,120	4,908
60-89 Days Past Due
90 Days and Greater	284	1,126
Total Past Due	2,404	6,034
Current	13,313	11,946
Total	15,717	17,980
Total Loans greater than 90 days and Accruing
Commercial loans and leases [Member]
Loan portfolio aging analysis
30-59 Days Past Due	281	434
60-89 Days Past Due		554
90 Days and Greater	780	219
Total Past Due	1,061	1,207
Current	25,461	29,754
Total	26,522	30,961
Total Loans greater than 90 days and Accruing
Municipal loans [Member]
Loan portfolio aging analysis
30-59 Days Past Due
60-89 Days Past Due
90 Days and Greater
Total Past Due
Current	1,179	740
Total	1,179	740
Total Loans greater than 90 days and Accruing
Consumer loans [Member]
Loan portfolio aging analysis
30-59 Days Past Due	33	8
60-89 Days Past Due	3	2
90 Days and Greater		9
Total Past Due	36	19
Current	2,307	2,841
Total	2,343	2,860
Total Loans greater than 90 days and Accruing		$ 9