Credit Quality Indicators (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	$ 572,903	$ 571,806
Residential real estate, 1-4 family residential [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	135,885	145,088
Residential real estate, 1-4 family residential [Member] | Performing [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	133,179	141,070
Residential real estate, 1-4 family residential [Member] | Nonperforming [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	2,706	4,018
Residential real estate, Home equity lines of credit [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	23,551	21,943
Residential real estate, Home equity lines of credit [Member] | Performing [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	23,172	21,644
Residential real estate, Home equity lines of credit [Member] | Nonperforming [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	379	299
Consumer, Indirect [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	118,640	118,743
Consumer, Indirect [Member] | Performing [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	118,627	118,617
Consumer, Indirect [Member] | Nonperforming [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	13	126
Consumer, Direct [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	11,417	11,596
Consumer, Direct [Member] | Performing [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	11,417	11,583
Consumer, Direct [Member] | Nonperforming [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	0	13
Consumer, Other [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	1,490	1,520
Consumer, Other [Member] | Performing [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	1,488	1,518
Consumer, Other [Member] | Nonperforming [Member]
Investment in residential, consumer and indirect auto loans based on payment activity
Loans	$ 2	$ 2