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Allowance For Loan Loss Additional Information (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]      
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment $ 6,174   $ 5,661
Financing Receivable, Collectively Evaluated for Impairment 385,568   390,961
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment 283   842
Financing Receivable, Individually Evaluated for Impairment 5,407   8,631
Allowance for loan losses 6,457 6,723 6,503
Loans and Leases Receivable, Gross, Carrying Amount 390,975 398,426 399,592
Commercial and Industrial Loans [Member]
     
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]      
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment 675   731
Financing Receivable, Collectively Evaluated for Impairment 55,882   59,223
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment 0   0
Financing Receivable, Individually Evaluated for Impairment 148   195
Allowance for loan losses 675   731
Loans and Leases Receivable, Gross, Carrying Amount 56,030 59,334 59,418
Construction And Land Development Loans [Member]
     
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]      
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment 1,347   1,257
Financing Receivable, Collectively Evaluated for Impairment 44,285   35,110
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment 107   366
Financing Receivable, Individually Evaluated for Impairment 1,601   3,858
Allowance for loan losses 1,454   1,623
Loans and Leases Receivable, Gross, Carrying Amount 45,886 37,631 38,968
Commercial Real Estate Loans, Total [Member]
     
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]      
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment 2,991   2,666
Financing Receivable, Collectively Evaluated for Impairment 174,922   182,817
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment 120   151
Financing Receivable, Individually Evaluated for Impairment 2,369   3,029
Allowance for loan losses 3,111   2,817
Loans and Leases Receivable, Gross, Carrying Amount 177,291 183,611 185,846
Residential Real Estate Loans, Total [Member]
     
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]      
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment 1,069   953
Financing Receivable, Collectively Evaluated for Impairment 97,732   102,678
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment 56   325
Financing Receivable, Individually Evaluated for Impairment 1,289   1,549
Allowance for loan losses 1,125   1,278
Loans and Leases Receivable, Gross, Carrying Amount 99,021 105,631 104,227
Consumer Installment and Revolving Loans [Member]
     
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]      
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment 92   54
Financing Receivable, Collectively Evaluated for Impairment 12,747   11,133
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment 0   0
Financing Receivable, Individually Evaluated for Impairment 0   0
Allowance for loan losses 92   54
Loans and Leases Receivable, Gross, Carrying Amount $ 12,747 $ 12,219 $ 11,133