Allowance for Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012 Contract	Sep. 30, 2011 Contract	Sep. 30, 2012 Contract	Sep. 30, 2011 Contract
Schedule of Troubled Debt Restructurings
Number of Contracts	4	1	35	1
Pre-Modification Outstanding Investment	$ 601	$ 143	$ 3,505	$ 143
Post-Modification Outstanding Recorded Investment	901	144	3,419	144
Commercial and Agriculture [Member]
Schedule of Troubled Debt Restructurings
Number of Contracts	2		6
Pre-Modification Outstanding Investment	197		983
Post-Modification Outstanding Recorded Investment	497		976
Commercial Real Estate [Member]
Schedule of Troubled Debt Restructurings
Number of Contracts			3
Pre-Modification Outstanding Investment			1,206
Post-Modification Outstanding Recorded Investment			1,206
Residential Real Estate [Member]
Schedule of Troubled Debt Restructurings
Number of Contracts	1	1	21	1
Pre-Modification Outstanding Investment	385	143	1,250	143
Post-Modification Outstanding Recorded Investment	385	144	1,171	144
Real estate - construction [Member]
Schedule of Troubled Debt Restructurings
Number of Contracts
Pre-Modification Outstanding Investment
Post-Modification Outstanding Recorded Investment
Consumer [Member]
Schedule of Troubled Debt Restructurings
Number of Contracts	1		5
Pre-Modification Outstanding Investment	19		66
Post-Modification Outstanding Recorded Investment	$ 19		$ 66