Loans and Allowance for Loan Losses (Details 9) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012 Loan	Sep. 30, 2011 Loan	Sep. 30, 2012 Loan	Sep. 30, 2011 Loan
Loans modified through reduction of interest rate
Number of Loans	1	2	7	5
Recorded Investment	$ 1,345	$ 332	$ 1,345	$ 332
Loans modified through extension of term
Number of Loans	1	2	7	11
Recorded Investment	224	815	224	815
Loans modified through change in payment terms
Number of Loans			0	2
Recorded Investment	0	51	0	51
Commercial [Member]
Loans modified through extension of term
Number of Loans			0	3
Recorded Investment	0	970	0	970
Loans modified through change in payment terms
Number of Loans			0	1
Recorded Investment	0	45	0	45
Commercial real estate [Member]
Loans modified through reduction of interest rate
Number of Loans	1	0	5	1
Recorded Investment	1,345	0	1,345	0
Loans modified through extension of term
Number of Loans	1	1	5	7
Recorded Investment	224	808	224	808
Loans modified through change in payment terms
Number of Loans			0	1
Recorded Investment	0	6	0	6
Residential real estate [Member]
Loans modified through reduction of interest rate
Number of Loans	0	1	1	1
Recorded Investment	0	204	0	204
Loans modified through extension of term
Number of Loans	0	0	1	0
Recorded Investment	0	0	0	0
Installment loans [Member]
Loans modified through reduction of interest rate
Number of Loans	0	1	1	3
Recorded Investment	0	128	0	128
Loans modified through extension of term
Number of Loans	0	1	1	1
Recorded Investment	$ 0	$ 7	$ 0	$ 7