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Loans and Allowance for Loan Losses (Details 5) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Additional information about impaired loans    
Recorded Investment, With no related allowance recorded $ 14,733 $ 23,223
Recorded Investment, With an allowance recorded 24,630 30,397
Total impaired loans 39,363 53,620
Unpaid Principal Balance, With no related allowance recorded 16,594 30,190
Unpaid Principal Balance, With an allowance recorded 25,308 30,960
Total impaired loans, Unpaid Principal Balance 41,902 61,150
Related Allowance with no related allowance recorded 0 0
Related Allowance with allowance recorded 4,020 3,748
Average Recorded Investment, With no related allowance recorded 22,523 30,407
Average Recorded Investment, With an allowance recorded 20,929  
Total impaired loans, Average Recorded Investment 43,452 52,841
Interest Recognized For the Period Ended, With no related allowance recorded 275 155
Interest Recognized For the Period Ended, With an allowance recorded 139  
Total impaired loans, Interest Recognized For the Period Ended 414 285
Commercial, Financial, and Agricultural [Member]
   
Additional information about impaired loans    
Recorded Investment, With no related allowance recorded 3,272 3,546
Recorded Investment, With an allowance recorded 885 882
Unpaid Principal Balance, With no related allowance recorded 4,009 3,625
Unpaid Principal Balance, With an allowance recorded 898 904
Related Allowance with no related allowance recorded 0 0
Related Allowance with allowance recorded 213 239
Average Recorded Investment, With no related allowance recorded 4,157 3,510
Average Recorded Investment, With an allowance recorded 776 655
Interest Recognized For the Period Ended, With no related allowance recorded 93 52
Interest Recognized For the Period Ended, With an allowance recorded 29 17
Real estate construction - residential [Member]
   
Additional information about impaired loans    
Recorded Investment, With no related allowance recorded 2,307 584
Recorded Investment, With an allowance recorded 189 563
Unpaid Principal Balance, With no related allowance recorded 2,339 788
Unpaid Principal Balance, With an allowance recorded 189 563
Related Allowance with no related allowance recorded 0 0
Related Allowance with allowance recorded 125 167
Average Recorded Investment, With no related allowance recorded 1,137 1,273
Average Recorded Investment, With an allowance recorded 189 47
Interest Recognized For the Period Ended, With no related allowance recorded 7 0
Interest Recognized For the Period Ended, With an allowance recorded 0 0
Real estate construction - commercial [Member]
   
Additional information about impaired loans    
Recorded Investment, With no related allowance recorded 1,879 1,459
Recorded Investment, With an allowance recorded 5,883 6,409
Unpaid Principal Balance, With no related allowance recorded 2,102 1,756
Unpaid Principal Balance, With an allowance recorded 6,011 6,448
Related Allowance with no related allowance recorded 0 0
Related Allowance with allowance recorded 542 380
Average Recorded Investment, With no related allowance recorded 1,692 3,568
Average Recorded Investment, With an allowance recorded 6,087 5,805
Interest Recognized For the Period Ended, With no related allowance recorded 0 0
Interest Recognized For the Period Ended, With an allowance recorded 0 0
Real estate mortgage - residential [Member]
   
Additional information about impaired loans    
Recorded Investment, With no related allowance recorded 1,939 2,315
Recorded Investment, With an allowance recorded 3,832 4,254
Unpaid Principal Balance, With no related allowance recorded 2,393 2,654
Unpaid Principal Balance, With an allowance recorded 3,999 4,265
Related Allowance with no related allowance recorded 0 0
Related Allowance with allowance recorded 1,069 653
Average Recorded Investment, With no related allowance recorded 3,169 3,596
Average Recorded Investment, With an allowance recorded 2,604 3,203
Interest Recognized For the Period Ended, With no related allowance recorded 50 26
Interest Recognized For the Period Ended, With an allowance recorded 11 113
Real estate mortgage - commercial [Member]
   
Additional information about impaired loans    
Recorded Investment, With no related allowance recorded 5,162 15,151
Recorded Investment, With an allowance recorded 13,797 18,289
Unpaid Principal Balance, With no related allowance recorded 5,565 21,190
Unpaid Principal Balance, With an allowance recorded 14,167 18,780
Related Allowance with no related allowance recorded 0 0
Related Allowance with allowance recorded 2,071 2,309
Average Recorded Investment, With no related allowance recorded 12,198 18,270
Average Recorded Investment, With an allowance recorded 11,271 12,724
Interest Recognized For the Period Ended, With no related allowance recorded 124 73
Interest Recognized For the Period Ended, With an allowance recorded 99 0
Consumer [Member]
   
Additional information about impaired loans    
Recorded Investment, With an allowance recorded 44  
Unpaid Principal Balance, With an allowance recorded 44  
Related Allowance with allowance recorded 0  
Average Recorded Investment, With no related allowance recorded 170 190
Average Recorded Investment, With an allowance recorded 2 0
Interest Recognized For the Period Ended, With no related allowance recorded 1 4
Interest Recognized For the Period Ended, With an allowance recorded 0 0
Installment Loans to Individuals [Member]
   
Additional information about impaired loans    
Recorded Investment, With no related allowance recorded 174 168
Unpaid Principal Balance, With no related allowance recorded 186 177
Related Allowance with no related allowance recorded 0 0
Average Recorded Investment, With an allowance recorded   22,434
Interest Recognized For the Period Ended, With an allowance recorded   $ 130