Loans and Allowance for Loan Losses (Details 6) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Summary of consumer credit exposure
Total loans (Note 4)	$ 297,463	$ 317,282
Residential real estate
Summary of consumer credit exposure
Total loans (Note 4)	38,437	39,091
Performing | Residential real estate
Summary of consumer credit exposure
Total loans (Note 4)	37,960	38,602
Nonperforming | Residential real estate
Summary of consumer credit exposure
Total loans (Note 4)	477	489
Consumer - other
Summary of consumer credit exposure
Total loans (Note 4)	4,225	4,552
Consumer - other | Performing
Summary of consumer credit exposure
Total loans (Note 4)	4,201	4,525
Consumer - other | Nonperforming
Summary of consumer credit exposure
Total loans (Note 4)	24	27
Consumer - home equity
Summary of consumer credit exposure
Total loans (Note 4)	17,583	17,910
Consumer - home equity | Performing
Summary of consumer credit exposure
Total loans (Note 4)	17,512	17,838
Consumer - home equity | Nonperforming
Summary of consumer credit exposure
Total loans (Note 4)	$ 71	$ 72