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Loans and Allowance for Loan Losses (Details 9) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Loans that were modified as TDRs    
Number of Contracts $ 14 $ 33
Pre- Modification 2,026 20,826
Post- Modification 1,999 19,983
Commercial, financial, and agricultural [Member]
   
Loans that were modified as TDRs    
Number of Contracts 4 9
Pre- Modification 637 3,500
Post- Modification 613 3,486
Real estate construction - commercial [Member]
   
Loans that were modified as TDRs    
Number of Contracts 1 8
Pre- Modification 43 6,616
Post- Modification 41 6,227
Real Estate Mortgage - Residential [Member]
   
Loans that were modified as TDRs    
Number of Contracts 5 7
Pre- Modification 657 1,157
Post- Modification 657 1,010
Real Estate Mortgage Commercial [Member]
   
Loans that were modified as TDRs    
Number of Contracts 2 9
Pre- Modification 645 9,553
Post- Modification 644 9,215
Consumer [Member]
   
Loans that were modified as TDRs    
Number of Contracts 2 0
Pre- Modification 44 0
Post- Modification $ 44 $ 0