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Loans, Allowance For Loan Losses And OREO (Allowance For Credit Losses And Recorded Investment In Financing Receivables) (Details) (USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]      
Allowance for Credit Losses: Beginning Balance $ 5,535,000 $ 5,612,000 $ 5,612,000
Allowance for Credit Losses: Charge-offs (186,000)   (2,599,000)
Allowance for Credit Losses: Recoveries 22,000   233,000
Allowance for credit losses: Provision 235,000 750,000 2,289,000
Allowance for Credit Losses: Ending Balance 5,606,000   5,535,000
Allowance for Credit Losses: Ending Balance: Individually evaluated for impairment 1,556,000   1,537,000
Allowance for Credit Losses: Ending Balance: Collectively evaluated for impairment 4,050,000   3,998,000
Allowance for Credit Losses: Totals 5,606,000   5,535,000
Financing Receivables: Ending Balance: Individually evaluated for impairment 19,862,000   22,338,000
Financing Receivables: Ending Balance: Collectively evaluated for impairment 311,254,000   303,119,000
Total Financing Receivables 331,116,000   325,457,000
Commercial [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Allowance for Credit Losses: Beginning Balance 987,000 892,000 892,000
Allowance for Credit Losses: Charge-offs (19,000)   (739,000)
Allowance for Credit Losses: Recoveries 8,000   18,000
Allowance for credit losses: Provision (120,000)   816,000
Allowance for Credit Losses: Ending Balance 856,000   987,000
Allowance for Credit Losses: Ending Balance: Individually evaluated for impairment 176,000   373,000
Allowance for Credit Losses: Ending Balance: Collectively evaluated for impairment 680,000   614,000
Allowance for Credit Losses: Totals 856,000   987,000
Financing Receivables: Ending Balance: Individually evaluated for impairment 4,063,000   3,150,000
Financing Receivables: Ending Balance: Collectively evaluated for impairment 53,345,000   51,934,000
Total Financing Receivables 57,408,000   55,084,000
Commercial Real Estate [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Allowance for Credit Losses: Beginning Balance 2,849,000 2,677,000 2,677,000
Allowance for Credit Losses: Charge-offs (149,000)   (1,061,000)
Allowance for Credit Losses: Recoveries     129,000
Allowance for credit losses: Provision 329,000   1,104,000
Allowance for Credit Losses: Ending Balance 3,029,000   2,849,000
Allowance for Credit Losses: Ending Balance: Individually evaluated for impairment 1,042,000   808,000
Allowance for Credit Losses: Ending Balance: Collectively evaluated for impairment 1,987,000   2,041,000
Allowance for Credit Losses: Totals 3,029,000   2,849,000
Financing Receivables: Ending Balance: Individually evaluated for impairment 12,466,000   15,035,000
Financing Receivables: Ending Balance: Collectively evaluated for impairment 144,446,000   138,381,000
Total Financing Receivables 156,912,000   153,416,000
Consumer [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Allowance for Credit Losses: Beginning Balance 1,057,000 1,486,000 1,486,000
Allowance for Credit Losses: Charge-offs (7,000)   (697,000)
Allowance for Credit Losses: Recoveries 14,000   77,000
Allowance for credit losses: Provision 77,000   191,000
Allowance for Credit Losses: Ending Balance 1,141,000   1,057,000
Allowance for Credit Losses: Ending Balance: Individually evaluated for impairment 180,000   196,000
Allowance for Credit Losses: Ending Balance: Collectively evaluated for impairment 961,000   861,000
Allowance for Credit Losses: Totals 1,141,000   1,057,000
Financing Receivables: Ending Balance: Individually evaluated for impairment 757,000   1,000,000
Financing Receivables: Ending Balance: Collectively evaluated for impairment 69,684,000   69,639,000
Total Financing Receivables 70,441,000   70,639,000
Residential Real Estate [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Allowance for Credit Losses: Beginning Balance 642,000 557,000 557,000
Allowance for Credit Losses: Charge-offs (11,000)   (102,000)
Allowance for Credit Losses: Recoveries     9,000
Allowance for credit losses: Provision (51,000)   178,000
Allowance for Credit Losses: Ending Balance 580,000   642,000
Allowance for Credit Losses: Ending Balance: Individually evaluated for impairment 158,000   160,000
Allowance for Credit Losses: Ending Balance: Collectively evaluated for impairment 422,000   482,000
Allowance for Credit Losses: Totals 580,000   642,000
Financing Receivables: Ending Balance: Individually evaluated for impairment 2,576,000   3,153,000
Financing Receivables: Ending Balance: Collectively evaluated for impairment 43,779,000   43,165,000
Total Financing Receivables $ 46,355,000   $ 46,318,000