Loans and the Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012 Loan	Dec. 31, 2011 Loan
Restructured loans
Number of Loans	32	31
Pre-Modification Outstanding Recorded Investment	$ 38,916	$ 38,350
Post-Modification Outstanding Recorded Investment	30,918	36,311
Commercial, financial, agricultural [Member]
Restructured loans
Number of Loans
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Lease financing [Member]
Restructured loans
Number of Loans
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Real estate - construction [Member]
Restructured loans
Number of Loans
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Real estate - 1-4 family mortgage [Member]
Restructured loans
Number of Loans	17	18
Pre-Modification Outstanding Recorded Investment	19,924	20,313
Post-Modification Outstanding Recorded Investment	12,441	18,089
Real estate - commercial mortgage [Member]
Restructured loans
Number of Loans	14	12
Pre-Modification Outstanding Recorded Investment	18,808	17,853
Post-Modification Outstanding Recorded Investment	18,301	18,043
Installment loans to individuals [Member]
Restructured loans
Number of Loans	1	1
Pre-Modification Outstanding Recorded Investment	184	184
Post-Modification Outstanding Recorded Investment	$ 176	$ 179