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Allowance For Loan Losses (Allowance For Loan Losses By Segment) (Details) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Financing Receivable, Impaired [Line Items]      
Beginning Balance $ 8,743 $ 7,111 $ 7,111
Charge-Offs (2,647) (2,638) (2,966)
Recoveries 215 568 848
Provision 1,650 2,850 3,750
Ending Balance 7,961 7,891 8,743
Ending balance: Individually evaluated for impairment 3,361   4,233
Ending balance: collectively evaluated for impairment 4,600   4,510
Financing Receivables Ending Balance 427,499   410,424
Ending balance individually evaluated for impairment 17,738   19,890
Ending balance collectively evaluated for impairment 409,761   390,534
Construction And Farmland [Member]
      
Financing Receivable, Impaired [Line Items]      
Beginning Balance 2,618 1,386 1,386
Charge-Offs (1,303)   (721)
Recoveries 3   5
Provision 212   1,948
Ending Balance 1,530   2,618
Ending balance: Individually evaluated for impairment 141   1,468
Ending balance: collectively evaluated for impairment 1,389   1,150
Financing Receivables Ending Balance 41,170   34,969
Ending balance individually evaluated for impairment 1,982   3,357
Ending balance collectively evaluated for impairment 39,188   31,612
Residential Real Estate [Member]
      
Financing Receivable, Impaired [Line Items]      
Beginning Balance 3,544 3,457 3,457
Charge-Offs (508)   (1,203)
Recoveries 60   298
Provision 361   992
Ending Balance 3,457   3,544
Ending balance: Individually evaluated for impairment 2,005   2,071
Ending balance: collectively evaluated for impairment 1,452   1,473
Financing Receivables Ending Balance 219,304   217,155
Ending balance individually evaluated for impairment 8,823   9,748
Ending balance collectively evaluated for impairment 210,481   207,407
Commercial Real Estate [Member]
      
Financing Receivable, Impaired [Line Items]      
Beginning Balance 1,057 1,231 1,231
Charge-Offs (660)   (14)
Recoveries 58   2
Provision 1,681   (162)
Ending Balance 2,136   1,057
Ending balance: Individually evaluated for impairment 740   150
Ending balance: collectively evaluated for impairment 1,396   907
Financing Receivables Ending Balance 130,272   118,043
Ending balance individually evaluated for impairment 6,220   6,186
Ending balance collectively evaluated for impairment 124,052   111,857
Commercial [Member]
      
Financing Receivable, Impaired [Line Items]      
Beginning Balance 1,077 819 819
Charge-Offs (50)   (572)
Recoveries 30   292
Provision (216)   538
Ending Balance 841   1,077
Ending balance: Individually evaluated for impairment 475   544
Ending balance: collectively evaluated for impairment 366   533
Financing Receivables Ending Balance 20,286   22,866
Ending balance individually evaluated for impairment 713   599
Ending balance collectively evaluated for impairment 19,573   22,267
Consumer [Member]
      
Financing Receivable, Impaired [Line Items]      
Beginning Balance 131 182 182
Charge-Offs (103)   (331)
Recoveries 57   195
Provision 35   85
Ending Balance 120   131
Ending balance: collectively evaluated for impairment 120   131
Financing Receivables Ending Balance 13,348   13,185
Ending balance collectively evaluated for impairment 13,348   13,185
All Other Loans [Member]
      
Financing Receivable, Impaired [Line Items]      
Beginning Balance 123 36 36
Charge-Offs (23)   (125)
Recoveries 7   56
Provision 6   156
Ending Balance 113   123
Ending balance: collectively evaluated for impairment 113   123
Financing Receivables Ending Balance 3,119   4,206
Ending balance collectively evaluated for impairment 3,119   4,206
Unallocated [Member]
      
Financing Receivable, Impaired [Line Items]      
Beginning Balance 193      
Charge-Offs       
Recoveries       
Provision (429)   193
Ending Balance (236)   193
Ending balance: Individually evaluated for impairment       
Ending balance: collectively evaluated for impairment (236)   193
Financing Receivables Ending Balance       
Ending balance individually evaluated for impairment       
Ending balance collectively evaluated for impairment