Impaired Loans and Valuation Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012 Contract
Modified Loans
Number of Contracts	22
Pre-Modification Outstanding Recorded Investment	$ 4,603
Specific Reserve Recorded	0
Post-Modification Outstanding Recorded Investment	4,355
Valuation Allowance Recorded	248
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	63
Valuation Allowance Recorded	7
Residential real estate [Member]
Modified Loans
Number of Contracts	18
Pre-Modification Outstanding Recorded Investment	3,842
Specific Reserve Recorded	0
Post-Modification Outstanding Recorded Investment	3,604
Valuation Allowance Recorded	238
Commercial real estate [Member]
Modified Loans
Number of Contracts	1
Pre-Modification Outstanding Recorded Investment	616
Specific Reserve Recorded	0
Post-Modification Outstanding Recorded Investment	616
Valuation Allowance Recorded	0
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