Loans Receivable (Details 5) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Recorded investment and unpaid principal balances for impaired loans receivable
Recorded Investment	$ 15,677	$ 15,904
Unpaid Principal Balance	15,951	16,174
Related Allowance	1,100	1,164
Commercial Real Estate [Member]
Recorded investment and unpaid principal balances for impaired loans receivable
Recorded Investment	13,055	13,414
Unpaid Principal Balance	13,325	13,684
Related Allowance	1,049	1,110
Residential Single Family [Member]
Recorded investment and unpaid principal balances for impaired loans receivable
Recorded Investment	1,359	1,360
Unpaid Principal Balance	1,359	1,360
Residential Construction Loans Consumer loans [Member]
Recorded investment and unpaid principal balances for impaired loans receivable
Recorded Investment	878	803
Unpaid Principal Balance	878	803
Consumer Loan [Member]
Recorded investment and unpaid principal balances for impaired loans receivable
Recorded Investment	385	327
Unpaid Principal Balance	389	327
Related Allowance	51	54
With an allowance recorded [Member] | Commercial Real Estate [Member]
Recorded investment and unpaid principal balances for impaired loans receivable
Recorded Investment	7,920	7,981
Unpaid Principal Balance	8,083	8,144
Related Allowance	1,049	1,110
With an allowance recorded [Member] | Consumer Home Equity [Member]
Recorded investment and unpaid principal balances for impaired loans receivable
Recorded Investment	174	179
Unpaid Principal Balance	151	179
Related Allowance	47	50
With an allowance recorded [Member] | Dealer Auto and RV [Member]
Recorded investment and unpaid principal balances for impaired loans receivable
Recorded Investment	4	4
Unpaid Principal Balance	4	4
Related Allowance	4	4
With no related allowance recorded [Member] | Commercial Real Estate [Member]
Recorded investment and unpaid principal balances for impaired loans receivable
Recorded Investment	5,135	5,433
Unpaid Principal Balance	5,242	5,540
Related Allowance
With no related allowance recorded [Member] | Residential Single Family [Member]
Recorded investment and unpaid principal balances for impaired loans receivable
Recorded Investment	1,359	1,360
Unpaid Principal Balance	1,359	1,360
Related Allowance
With no related allowance recorded [Member] | Residential Construction Loans Consumer loans [Member]
Recorded investment and unpaid principal balances for impaired loans receivable
Recorded Investment	878	803
Unpaid Principal Balance	878	803
Related Allowance
With no related allowance recorded [Member] | Consumer Home Equity [Member]
Recorded investment and unpaid principal balances for impaired loans receivable
Recorded Investment	196	130
Unpaid Principal Balance	223	130
Related Allowance
With no related allowance recorded [Member] | Dealer Auto and RV [Member]
Recorded investment and unpaid principal balances for impaired loans receivable
Recorded Investment	11	14
Unpaid Principal Balance	11	14
Related Allowance