Loans and Allowance for Loan Losses, Broken Down by Portfolio Segment (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Jun. 30, 2012
Dec. 31, 2011
Loans      
Individually evaluated $ 3,135   $ 5,125
Collectively evaluated 384,927   379,897
Total 388,062   385,022
Allowance for Loan Losses      
Individually evaluated 771   738
Collectively evaluated 3,629   3,773
Total 4,400 4,468 4,511
Real Estate
     
Loans      
Individually evaluated 2,867   4,841
Collectively evaluated 311,588   301,271
Total 314,455   306,112
Allowance for Loan Losses      
Individually evaluated 672   662
Collectively evaluated 3,202   3,375
Total 3,874   4,037
Installment and Other
     
Loans      
Individually evaluated 47   38
Collectively evaluated 21,637   16,107
Total 21,684   16,145
Allowance for Loan Losses      
Individually evaluated 44   13
Collectively evaluated 190   64
Total 234   77
Commercial Financial And Agricultural
     
Loans      
Individually evaluated 221   246
Collectively evaluated 51,702   62,519
Total 51,923   62,765
Allowance for Loan Losses      
Individually evaluated 55   63
Collectively evaluated 237   334
Total $ 292   $ 397