Loans and the Allowance for Loan Losses (Details 7) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Loan portfolio not subject to risk rating
Loan portfolio	$ 945,393	$ 854,485
Performing [Member]
Loan portfolio not subject to risk rating
Loan portfolio	938,953	847,071
Non-Performing [Member]
Loan portfolio not subject to risk rating
Loan portfolio	6,440	7,414
Commercial, financial, agricultural [Member]
Loan portfolio not subject to risk rating
Loan portfolio	68,982	62,062
Commercial, financial, agricultural [Member] | Performing [Member]
Loan portfolio not subject to risk rating
Loan portfolio	68,732	61,864
Commercial, financial, agricultural [Member] | Non-Performing [Member]
Loan portfolio not subject to risk rating
Loan portfolio	250	198
Lease financing [Member]
Loan portfolio not subject to risk rating
Loan portfolio	254	343
Lease financing [Member] | Performing [Member]
Loan portfolio not subject to risk rating
Loan portfolio	254	343
Lease financing [Member] | Non-Performing [Member]
Loan portfolio not subject to risk rating
Loan portfolio
Real estate-construction [Member]
Loan portfolio not subject to risk rating
Loan portfolio	22,142	19,096
Real estate-construction [Member] | Performing [Member]
Loan portfolio not subject to risk rating
Loan portfolio	22,142	18,756
Real estate-construction [Member] | Non-Performing [Member]
Loan portfolio not subject to risk rating
Loan portfolio		340
Real estate-1-4 family mortgage [Member]
Loan portfolio not subject to risk rating
Loan portfolio	619,112	560,653
Real estate-1-4 family mortgage [Member] | Performing [Member]
Loan portfolio not subject to risk rating
Loan portfolio	613,805	554,702
Real estate-1-4 family mortgage [Member] | Non-Performing [Member]
Loan portfolio not subject to risk rating
Loan portfolio	5,307	5,951
Real estate-commercial mortgage [Member]
Loan portfolio not subject to risk rating
Loan portfolio	179,004	156,806
Real estate-commercial mortgage [Member] | Performing [Member]
Loan portfolio not subject to risk rating
Loan portfolio	178,179	156,050
Real estate-commercial mortgage [Member] | Non-Performing [Member]
Loan portfolio not subject to risk rating
Loan portfolio	825	756
Installment loans to individuals [Member]
Loan portfolio not subject to risk rating
Loan portfolio	55,899	55,525
Installment loans to individuals [Member] | Performing [Member]
Loan portfolio not subject to risk rating
Loan portfolio	55,841	55,356
Installment loans to individuals [Member] | Non-Performing [Member]
Loan portfolio not subject to risk rating
Loan portfolio	$ 58	$ 169