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Loans, Allowance For Loan Losses And OREO (Impaired Loans) (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Financing Receivable, Impaired [Line Items]    
Totals: Recorded Investment $ 5,872 $ 7,690
Totals: Unpaid Principal Balance 6,668 9,071
Totals: Related Allowance 345 563
Totals: Average Recorded Investment 6,784 8,747
Totals: Interest Income Recognized 231 411
Commercial Mortgages-Owner Occupied [Member]    
Financing Receivable, Impaired [Line Items]    
With No Related Allowance Recorded: Recorded Investment 1,841 2,427
With No Related Allowance Recorded: Unpaid Principal Balance 1,934 2,539
With No Related Allowance Recorded: Average Recorded Investment 2,134 2,723
With No Related Allowance Recorded: Interest Income Recognized 100 179
With An Allowance Recorded: Recorded Investment 498 665
With An Allowance Recorded: Unpaid Principal Balance 498 665
With An Allowance Recorded: Average Recorded Investment 582 1,126
With An Allowance Recorded: Interest Income Recognized 22 39
Totals: Recorded Investment 2,339 3,092
Totals: Unpaid Principal Balance 2,432 3,204
Totals: Related Allowance 62 93
Totals: Average Recorded Investment 2,716 3,849
Totals: Interest Income Recognized 122 218
Commercial Mortgages-Non-Owner Occupied [Member]    
Financing Receivable, Impaired [Line Items]    
With No Related Allowance Recorded: Recorded Investment 132 675
With No Related Allowance Recorded: Unpaid Principal Balance 132 690
With No Related Allowance Recorded: Average Recorded Investment 404 512
With No Related Allowance Recorded: Interest Income Recognized 6 30
With An Allowance Recorded: Recorded Investment 71 73
With An Allowance Recorded: Unpaid Principal Balance 71 73
With An Allowance Recorded: Average Recorded Investment 72 74
With An Allowance Recorded: Interest Income Recognized 4 5
Totals: Recorded Investment 203 748
Totals: Unpaid Principal Balance 203 763
Totals: Related Allowance 5 18
Totals: Average Recorded Investment 476 586
Totals: Interest Income Recognized 10 35
Commercial Construction [Member]    
Financing Receivable, Impaired [Line Items]    
With An Allowance Recorded: Recorded Investment   169
With An Allowance Recorded: Unpaid Principal Balance   695
With An Allowance Recorded: Average Recorded Investment 85 169
Totals: Recorded Investment   169
Totals: Unpaid Principal Balance   695
Totals: Related Allowance   79
Totals: Average Recorded Investment 85 169
Consumer Unsecured [Member]    
Financing Receivable, Impaired [Line Items]    
With No Related Allowance Recorded: Recorded Investment 100
With No Related Allowance Recorded: Unpaid Principal Balance 100
With No Related Allowance Recorded: Average Recorded Investment 50
With No Related Allowance Recorded: Interest Income Recognized 6
With An Allowance Recorded: Recorded Investment 1 2
With An Allowance Recorded: Unpaid Principal Balance 1 2
With An Allowance Recorded: Average Recorded Investment 2 1
Totals: Recorded Investment 101 2
Totals: Unpaid Principal Balance 101 2
Totals: Related Allowance 1 2
Totals: Average Recorded Investment 52 1
Totals: Interest Income Recognized 6  
Consumer Secured [Member]    
Financing Receivable, Impaired [Line Items]    
With No Related Allowance Recorded: Recorded Investment 85 279
With No Related Allowance Recorded: Unpaid Principal Balance 85 283
With No Related Allowance Recorded: Average Recorded Investment 182 149
With No Related Allowance Recorded: Interest Income Recognized 4 11
With An Allowance Recorded: Recorded Investment 106 427
With An Allowance Recorded: Unpaid Principal Balance 106 445
With An Allowance Recorded: Average Recorded Investment 267 269
With An Allowance Recorded: Interest Income Recognized 5 11
Totals: Recorded Investment 191 706
Totals: Unpaid Principal Balance 191 728
Totals: Related Allowance 106 255
Totals: Average Recorded Investment 449 418
Totals: Interest Income Recognized 9 22
Residential Mortgages [Member]    
Financing Receivable, Impaired [Line Items]    
With No Related Allowance Recorded: Recorded Investment 1,066 1,580
With No Related Allowance Recorded: Unpaid Principal Balance 1,134 1,673
With No Related Allowance Recorded: Average Recorded Investment 1,323 1,568
With No Related Allowance Recorded: Interest Income Recognized 39 63
With An Allowance Recorded: Recorded Investment 145 151
With An Allowance Recorded: Unpaid Principal Balance 153 178
With An Allowance Recorded: Average Recorded Investment 148 425
With An Allowance Recorded: Interest Income Recognized 3 3
Totals: Recorded Investment 1,211 1,731
Totals: Unpaid Principal Balance 1,287 1,851
Totals: Related Allowance 38 4
Totals: Average Recorded Investment 1,471 1,993
Totals: Interest Income Recognized 42 66
Residential Consumer Construction [Member]    
Financing Receivable, Impaired [Line Items]    
With No Related Allowance Recorded: Recorded Investment 800
With No Related Allowance Recorded: Unpaid Principal Balance 820
With No Related Allowance Recorded: Average Recorded Investment 400
With No Related Allowance Recorded: Interest Income Recognized 23
With An Allowance Recorded: Recorded Investment  
With An Allowance Recorded: Unpaid Principal Balance  
With An Allowance Recorded: Average Recorded Investment  
With An Allowance Recorded: Interest Income Recognized  
Totals: Recorded Investment 800
Totals: Unpaid Principal Balance 820
Totals: Related Allowance  
Totals: Average Recorded Investment 400
Totals: Interest Income Recognized 23
Commercial [Member]    
Financing Receivable, Impaired [Line Items]    
With No Related Allowance Recorded: Recorded Investment 790 925
With No Related Allowance Recorded: Unpaid Principal Balance 989 1,505
With No Related Allowance Recorded: Average Recorded Investment 858 812
With No Related Allowance Recorded: Interest Income Recognized 18 54
With An Allowance Recorded: Recorded Investment 237 317
With An Allowance Recorded: Unpaid Principal Balance 645 323
With An Allowance Recorded: Average Recorded Investment 277 919
With An Allowance Recorded: Interest Income Recognized 1 16
Totals: Recorded Investment 1,027 1,242
Totals: Unpaid Principal Balance 1,634 1,828
Totals: Related Allowance 133 112
Totals: Average Recorded Investment 1,135 1,731
Totals: Interest Income Recognized $ 19 $ 70