Loans (Details 4) (USD $)	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Classes of the loan portfolio summarized credit quality indicators:
Minimum threshold for performing annual review of commercial relationship	$ 750,000
Total Loans	474,854,000	446,443,000
Commercial
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	333,687,000	299,639,000
Commercial | Pass
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	321,763,000	286,472,000
Commercial | Special Mention
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	6,311,000	8,646,000
Commercial | Substandard
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	4,913,000	1,770,000
Commercial | Doubtful
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	700,000	2,751,000
Residential Real Estate
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	100,918,000	113,212,000
Residential Real Estate | Pass
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	97,723,000	110,663,000
Residential Real Estate | Special Mention
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	2,722,000	2,260,000
Residential Real Estate | Substandard
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	430,000	289,000
Residential Real Estate | Doubtful
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	43,000
Home Equity
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	21,547,000	16,800,000
Home Equity | Pass
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	21,239,000	16,540,000
Home Equity | Special Mention
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	308,000	260,000
Home Equity | Substandard
Classes of the loan portfolio summarized credit quality indicators:
Total Loans
Home Equity | Doubtful
Classes of the loan portfolio summarized credit quality indicators:
Total Loans
Installment
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	18,083,000	16,174,000
Installment | Pass
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	17,596,000	15,806,000
Installment | Special Mention
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	467,000	354,000
Installment | Substandard
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	19,000	13,000
Installment | Doubtful
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	1,000	1,000
Credit Card
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	619,000	618,000
Credit Card | Pass
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	607,000	589,000
Credit Card | Special Mention
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	12,000	29,000
Credit Card | Substandard
Classes of the loan portfolio summarized credit quality indicators:
Total Loans
Credit Card | Doubtful
Classes of the loan portfolio summarized credit quality indicators:
Total Loans
Total | Pass
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	458,928,000	430,070,000
Total | Special Mention
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	9,820,000	11,549,000
Total | Substandard
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	5,362,000	2,072,000
Total | Doubtful
Classes of the loan portfolio summarized credit quality indicators:
Total Loans	$ 744,000	$ 2,752,000