Impaired Loans and Valuation Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012 Contract
Modified Loans
Number of Contracts	27
Pre-Modification Outstanding Recorded Investment	$ 5,187
Specific Reserve Recorded	0
Post-Modification Outstanding Recorded Investment	4,832
Valuation Allowance Recorded	355
Construction and Land Development [Member]
Modified Loans
Number of Contracts	1
Pre-Modification Outstanding Recorded Investment	70
Specific Reserve Recorded	0
Post-Modification Outstanding Recorded Investment	64
Valuation Allowance Recorded	6
Residential Real Estate [Member]
Modified Loans
Number of Contracts	22
Pre-Modification Outstanding Recorded Investment	4,242
Specific Reserve Recorded	0
Post-Modification Outstanding Recorded Investment	3,949
Valuation Allowance Recorded	293
Commercial Real Estate [Member]
Modified Loans
Number of Contracts	2
Pre-Modification Outstanding Recorded Investment	800
Specific Reserve Recorded	0
Post-Modification Outstanding Recorded Investment	747
Valuation Allowance Recorded	53
Commercial and Financial [Member]
Modified Loans
Number of Contracts	0
Pre-Modification Outstanding Recorded Investment	0
Specific Reserve Recorded	0
Post-Modification Outstanding Recorded Investment	0
Valuation Allowance Recorded	0
Consumer [Member]
Modified Loans
Number of Contracts	2
Pre-Modification Outstanding Recorded Investment	75
Specific Reserve Recorded	0
Post-Modification Outstanding Recorded Investment	72
Valuation Allowance Recorded	$ 3