Loans (Details 6) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Summary of credit quality
Financing Receivable	$ 198,279	$ 206,699
Commercial and industrial [Member]
Summary of credit quality
Financing Receivable	25,649	26,203
Construction [Member]
Summary of credit quality
Financing Receivable	1,881	4,361
Commercial and real estate [Member]
Summary of credit quality
Financing Receivable	94,535	94,513
Residential mortgage [Member]
Summary of credit quality
Financing Receivable	18,386	21,054
Home equity [Member]
Summary of credit quality
Financing Receivable	56,502	59,176
Individual loans for household and other personal expenditures [Member]
Summary of credit quality
Financing Receivable	1,326	1,392
Pass [Member]
Summary of credit quality
Financing Receivable	180,247	178,317
Pass [Member] | Commercial and industrial [Member]
Summary of credit quality
Financing Receivable	24,615	24,582
Pass [Member] | Construction [Member]
Summary of credit quality
Financing Receivable	1,881	1,144
Pass [Member] | Commercial and real estate [Member]
Summary of credit quality
Financing Receivable	85,798	84,492
Pass [Member] | Residential mortgage [Member]
Summary of credit quality
Financing Receivable	13,896	12,042
Pass [Member] | Home equity [Member]
Summary of credit quality
Financing Receivable	52,731	54,665
Pass [Member] | Individual loans for household and other personal expenditures [Member]
Summary of credit quality
Financing Receivable	1,326	1,392
Special Mention [Member]
Summary of credit quality
Financing Receivable	7,770	8,595
Special Mention [Member] | Commercial and industrial [Member]
Summary of credit quality
Financing Receivable	762	910
Special Mention [Member] | Commercial and real estate [Member]
Summary of credit quality
Financing Receivable	3,403	3,351
Special Mention [Member] | Residential mortgage [Member]
Summary of credit quality
Financing Receivable	2,994	3,804
Special Mention [Member] | Home equity [Member]
Summary of credit quality
Financing Receivable	611	530
Substandard [Member]
Summary of credit quality
Financing Receivable	10,262	19,787
Substandard [Member] | Commercial and industrial [Member]
Summary of credit quality
Financing Receivable	272	711
Substandard [Member] | Construction [Member]
Summary of credit quality
Financing Receivable		3,217
Substandard [Member] | Commercial and real estate [Member]
Summary of credit quality
Financing Receivable	5,334	6,670
Substandard [Member] | Residential mortgage [Member]
Summary of credit quality
Financing Receivable	1,496	5,208
Substandard [Member] | Home equity [Member]
Summary of credit quality
Financing Receivable	3,160	3,981
Doubtful [Member]
Summary of credit quality
Financing Receivable
Doubtful [Member] | Commercial and industrial [Member]
Summary of credit quality
Financing Receivable
Doubtful [Member] | Construction [Member]
Summary of credit quality
Financing Receivable
Doubtful [Member] | Commercial and real estate [Member]
Summary of credit quality
Financing Receivable
Doubtful [Member] | Residential mortgage [Member]
Summary of credit quality
Financing Receivable
Doubtful [Member] | Home equity [Member]
Summary of credit quality
Financing Receivable
Doubtful [Member] | Individual loans for household and other personal expenditures [Member]
Summary of credit quality
Financing Receivable
Loss [Member]
Summary of credit quality
Financing Receivable
Loss [Member] | Commercial and industrial [Member]
Summary of credit quality
Financing Receivable
Loss [Member] | Construction [Member]
Summary of credit quality
Financing Receivable
Loss [Member] | Commercial and real estate [Member]
Summary of credit quality
Financing Receivable
Loss [Member] | Residential mortgage [Member]
Summary of credit quality
Financing Receivable
Loss [Member] | Home equity [Member]
Summary of credit quality
Financing Receivable
Loss [Member] | Individual loans for household and other personal expenditures [Member]
Summary of credit quality
Financing Receivable