Allowance for Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012 Contract	Jun. 30, 2012 Contract
Schedule of Troubled Debt Restructurings
Number of Contracts	20	31
Pre-Modification Outstanding Investment	$ 1,353	$ 2,604
Post-Modification Outstanding Recorded Investment	1,274	2,517
Commercial and agriculture [Member]
Schedule of Troubled Debt Restructurings
Number of Contracts	1	4
Pre-Modification Outstanding Investment	442	487
Post-Modification Outstanding Recorded Investment	442	479
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	15	20
Pre-Modification Outstanding Investment	865	865
Post-Modification Outstanding Recorded Investment	786	786
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	4	4
Pre-Modification Outstanding Investment	46	46
Post-Modification Outstanding Recorded Investment	$ 46	$ 46