Credit Quality of Loans and Allowance for Loan Losses, Summary of Loan Portfolio (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Loan portfolio [Abstract]
Total loans	$ 1,248,373	$ 1,137,554	$ 1,145,023
Less allowance for loan losses	(9,425)	(8,779)
Loans, net	1,238,948	1,128,775
Commercial, Financial and Agricultural [Member]
Loan portfolio [Abstract]
Total loans	452,065	403,976
Real Estate - Construction [Member]
Loan portfolio [Abstract]
Total loans	86,315	82,691
Real Estate - Commercial [Member]
Loan portfolio [Abstract]
Total loans	430,930	397,135
Real Estate - Residential [Member]
Loan portfolio [Abstract]
Total loans	153,915	146,841
Installment Loans to Individuals [Member]
Loan portfolio [Abstract]
Total loans	116,340	97,459
Lease Financing Receivable [Member]
Loan portfolio [Abstract]
Total loans	5,285	5,542
Other [Member]
Loan portfolio [Abstract]
Total loans	$ 3,523	$ 3,910