Impaired Loans and Valuation Allowance for Loan Losses (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013 Contract
Troubled debt restructurings defaulted
Number of Contracts	1
Recorded Investment	$ 72
Construction and land development [Member]
Troubled debt restructurings defaulted
Number of Contracts	0
Recorded Investment	0
Residential real estate [Member]
Troubled debt restructurings defaulted
Number of Contracts	1
Recorded Investment	72
Commercial real estate [Member]
Troubled debt restructurings defaulted
Number of Contracts	0
Recorded Investment	0
Commercial and financial [Member]
Troubled debt restructurings defaulted
Number of Contracts	0
Recorded Investment	0
Consumer [Member]
Troubled debt restructurings defaulted
Number of Contracts	0
Recorded Investment	$ 0