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Loans and Allowance for Loan Losses (Details) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Summary of loans, by major class within Company's loan portfolio    
Total loans $ 838,990,000 $ 846,984,000
Carrying amount of loans pledged as collateral to the Federal Home Loan Bank 405,522,000  
Commercial, financial, and agricultural
   
Summary of loans, by major class within Company's loan portfolio    
Total loans 136,643,000 130,040,000
Real estate construction - residential
   
Summary of loans, by major class within Company's loan portfolio    
Total loans 23,647,000 22,177,000
Real estate construction - commercial
   
Summary of loans, by major class within Company's loan portfolio    
Total loans 48,146,000 43,486,000
Real estate mortgage - residential
   
Summary of loans, by major class within Company's loan portfolio    
Total loans 217,828,000 221,223,000
Real estate mortgage - commercial
   
Summary of loans, by major class within Company's loan portfolio    
Total loans 389,706,000 405,092,000
Installment and other consumer
   
Summary of loans, by major class within Company's loan portfolio    
Total loans $ 23,020,000 $ 24,966,000