Loans and Allowance for Loan Losses (Details 8) (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
Information on TDRs with payment default
Number of Contracts	0	2	14	2
Recorded Investment	$ 0	$ 219	$ 0	$ 219
Commercial [Member]
Information on TDRs with payment default
Number of Contracts			3	0
Recorded Investment	747	0	747	0
Commercial real estate [Member]
Information on TDRs with payment default
Number of Contracts	0	2	10	2
Recorded Investment	0	219	0	219
Installment loans [Member]
Information on TDRs with payment default
Number of Contracts			1	0
Recorded Investment	$ 5	$ 0	$ 5	$ 0