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Allowance For Loan Losses (Allowance For Loan Losses By Segment) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Financing Receivable, Impaired [Line Items]      
Beginning Balance $ 6,577 $ 8,743 $ 8,743
Charge-Offs (42) (237) (4,163)
Recoveries 42 81 337
Provision 383 300 1,660
Ending Balance 6,960 8,887 6,577
Ending balance: Individually evaluated for impairment 2,246   2,359
Ending balance: collectively evaluated for impairment 4,714   4,218
Financing Receivables Ending Balance 423,850   418,097
Ending balance individually evaluated for impairment 15,017   15,252
Ending balance collectively evaluated for impairment 408,833   402,845
Construction And Farmland [Member]
     
Financing Receivable, Impaired [Line Items]      
Beginning Balance 1,280 2,618 2,618
Charge-Offs     (1,313)
Recoveries 1   4
Provision (428)   (29)
Ending Balance 853   1,280
Ending balance: Individually evaluated for impairment 139   141
Ending balance: collectively evaluated for impairment 714   1,139
Financing Receivables Ending Balance 31,451   37,876
Ending balance individually evaluated for impairment 1,308   1,326
Ending balance collectively evaluated for impairment 30,143   36,550
Residential Real Estate [Member]
     
Financing Receivable, Impaired [Line Items]      
Beginning Balance 2,820 3,544 3,544
Charge-Offs     (1,381)
Recoveries 3   67
Provision (26)   590
Ending Balance 2,797   2,820
Ending balance: Individually evaluated for impairment 1,179   1,176
Ending balance: collectively evaluated for impairment 1,618   1,644
Financing Receivables Ending Balance 218,473   217,427
Ending balance individually evaluated for impairment 7,777   7,695
Ending balance collectively evaluated for impairment 210,696   209,732
Commercial Real Estate [Member]
     
Financing Receivable, Impaired [Line Items]      
Beginning Balance 1,182 1,057 1,057
Charge-Offs     (1,118)
Recoveries 1   146
Provision 62   1,097
Ending Balance 1,245   1,182
Ending balance: Individually evaluated for impairment 298   305
Ending balance: collectively evaluated for impairment 947   877
Financing Receivables Ending Balance 135,835   124,382
Ending balance individually evaluated for impairment 5,064   5,246
Ending balance collectively evaluated for impairment 130,771   119,136
Commercial [Member]
     
Financing Receivable, Impaired [Line Items]      
Beginning Balance 880 1,077 1,077
Charge-Offs (14)   (207)
Recoveries 16   36
Provision (111)   (26)
Ending Balance 771   880
Ending balance: Individually evaluated for impairment 630   737
Ending balance: collectively evaluated for impairment 141   143
Financing Receivables Ending Balance 21,397   21,640
Ending balance individually evaluated for impairment 868   985
Ending balance collectively evaluated for impairment 20,529   20,655
Consumer [Member]
     
Financing Receivable, Impaired [Line Items]      
Beginning Balance 107 131 131
Charge-Offs (23)   (116)
Recoveries 17   73
Provision (12)   19
Ending Balance 89   107
Ending balance: collectively evaluated for impairment 89   107
Financing Receivables Ending Balance 13,163   13,307
Ending balance collectively evaluated for impairment 13,163   13,307
All Other Loans [Member]
     
Financing Receivable, Impaired [Line Items]      
Beginning Balance 122 123 123
Charge-Offs (5)   (28)
Recoveries 4   11
Provision 13   16
Ending Balance 134   122
Ending balance: collectively evaluated for impairment 134   122
Financing Receivables Ending Balance 3,531   3,465
Ending balance collectively evaluated for impairment 3,531   3,465
Unallocated [Member]
     
Financing Receivable, Impaired [Line Items]      
Beginning Balance 186 193 193
Charge-Offs       
Recoveries       
Provision 885   (7)
Ending Balance 1,071   186
Ending balance: Individually evaluated for impairment       
Ending balance: collectively evaluated for impairment 1,071   186
Financing Receivables Ending Balance       
Ending balance individually evaluated for impairment       
Ending balance collectively evaluated for impairment