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Allowance for Loan Losses (Details 1) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended 12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Allowance by impairment methodology and loans by impairment methodology      
Balance at beginning of year $ 12,937 $ 16,036 $ 16,036
Charge-offs (1,784) (6,234) (15,789)
Recoveries 196 156 310
Provision for loan losses 2,650 3,820 12,380
Balance at end of period 13,999 13,778 12,937
Allowance for Credit Losses, Individually evaluated for impairment 3,205   2,438
Allowance for Credit Losses, Collectively evaluated for impairment 10,794   10,499
Total loans 384,135   392,440
Individually evaluated for impairment 21,931   25,920
Collectively evaluated for impairment 362,204   366,520
Construction and Land Development [Member]
      
Allowance by impairment methodology and loans by impairment methodology      
Balance at beginning of year 2,843 4,050 4,050
Charge-offs (369)   (2,983)
Recoveries 1   50
Provision for loan losses 700   1,726
Balance at end of period 3,175   2,843
Allowance for Credit Losses, Individually evaluated for impairment 1,145   930
Allowance for Credit Losses, Collectively evaluated for impairment 2,030   1,913
Total loans 47,843   48,363
Individually evaluated for impairment 5,256   7,640
Collectively evaluated for impairment 42,587   40,723
Secured by 1-4 Family Residential [Member]
      
Allowance by impairment methodology and loans by impairment methodology      
Balance at beginning of year 3,766 1,681 1,681
Charge-offs (562)   (4,639)
Recoveries 2   6
Provision for loan losses 993   6,718
Balance at end of period 4,199   3,766
Allowance for Credit Losses, Individually evaluated for impairment 972   848
Allowance for Credit Losses, Collectively evaluated for impairment 3,227   2,918
Total loans 128,229   122,339
Individually evaluated for impairment 5,460   6,860
Collectively evaluated for impairment 122,769   115,479
Other Real Estate [Member]
      
Allowance by impairment methodology and loans by impairment methodology      
Balance at beginning of year 5,192 9,187 9,187
Charge-offs (674)   (7,551)
Recoveries 52    
Provision for loan losses 1,285   3,556
Balance at end of period 5,855   5,192
Allowance for Credit Losses, Individually evaluated for impairment 1,033   351
Allowance for Credit Losses, Collectively evaluated for impairment 4,822   4,841
Total loans 174,212   181,141
Individually evaluated for impairment 10,813   10,940
Collectively evaluated for impairment 163,399   170,201
Commercial and Industrial [Member]
      
Allowance by impairment methodology and loans by impairment methodology      
Balance at beginning of year 963 858 858
Charge-offs (74)   (348)
Recoveries 16   3
Provision for loan losses (264)   450
Balance at end of period 641   963
Allowance for Credit Losses, Individually evaluated for impairment 55   309
Allowance for Credit Losses, Collectively evaluated for impairment 586   654
Total loans 24,937   29,446
Individually evaluated for impairment 402   480
Collectively evaluated for impairment 24,535   28,966
Consumer and Other Loans [Member]
      
Allowance by impairment methodology and loans by impairment methodology      
Balance at beginning of year 173 260 260
Charge-offs (105)   (268)
Recoveries 125   251
Provision for loan losses (64)   (70)
Balance at end of period 129   173
Allowance for Credit Losses, Collectively evaluated for impairment 129   173
Total loans 8,914   11,151
Collectively evaluated for impairment $ 8,914   $ 11,151