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Loans, Allowance For Loan Losses And OREO (Impaired Loans) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Financing Receivable, Impaired [Line Items]    
Totals: Recorded Investment $ 6,865 $ 7,690
Totals: Unpaid Principal Balance 8,270 9,071
Totals: Related Allowance 383 563
Totals: Average Recorded Investment 7,281 8,747
Totals: Interest Income Recognized 86 411
Commercial Mortgages-Owner Occupied [Member]    
Financing Receivable, Impaired [Line Items]    
With No Related Allowance Recorded: Recorded Investment 2,340 2,427
With No Related Allowance Recorded: Unpaid Principal Balance 2,434 2,539
With No Related Allowance Recorded: Average Recorded Investment 2,384 2,723
With No Related Allowance Recorded: Interest Income Recognized 30 179
With An Allowance Recorded: Recorded Investment 517 665
With An Allowance Recorded: Unpaid Principal Balance 517 665
With An Allowance Recorded: Average Recorded Investment 591 1,126
With An Allowance Recorded: Interest Income Recognized 8 39
Totals: Recorded Investment 2,857 3,092
Totals: Unpaid Principal Balance 2,951 3,204
Totals: Related Allowance 81 93
Totals: Average Recorded Investment 2,975 3,849
Totals: Interest Income Recognized 38 218
Commercial Mortgages-Non-Owner Occupied [Member]    
Financing Receivable, Impaired [Line Items]    
With No Related Allowance Recorded: Recorded Investment 427 675
With No Related Allowance Recorded: Unpaid Principal Balance 439 690
With No Related Allowance Recorded: Average Recorded Investment 551 512
With No Related Allowance Recorded: Interest Income Recognized 8 30
With An Allowance Recorded: Recorded Investment 72 73
With An Allowance Recorded: Unpaid Principal Balance 72 73
With An Allowance Recorded: Average Recorded Investment 73 74
With An Allowance Recorded: Interest Income Recognized 1 5
Totals: Recorded Investment 499 748
Totals: Unpaid Principal Balance 511 763
Totals: Related Allowance 18 18
Totals: Average Recorded Investment 624 586
Totals: Interest Income Recognized 9 35
Commercial Construction [Member]    
Financing Receivable, Impaired [Line Items]    
With An Allowance Recorded: Recorded Investment 90 169
With An Allowance Recorded: Unpaid Principal Balance 703 695
With An Allowance Recorded: Average Recorded Investment 130 169
Totals: Recorded Investment 90 169
Totals: Unpaid Principal Balance 703 695
Totals: Related Allowance 1 79
Totals: Average Recorded Investment 130 169
Consumer Unsecured [Member]    
Financing Receivable, Impaired [Line Items]    
With No Related Allowance Recorded: Recorded Investment  
With No Related Allowance Recorded: Unpaid Principal Balance  
With No Related Allowance Recorded: Average Recorded Investment  
With No Related Allowance Recorded: Interest Income Recognized  
With An Allowance Recorded: Recorded Investment 2 2
With An Allowance Recorded: Unpaid Principal Balance 2 2
With An Allowance Recorded: Average Recorded Investment 2 1
Totals: Recorded Investment 2 2
Totals: Unpaid Principal Balance 2 2
Totals: Related Allowance 2 2
Totals: Average Recorded Investment 2 1
Consumer Secured [Member]    
Financing Receivable, Impaired [Line Items]    
With No Related Allowance Recorded: Recorded Investment 398 279
With No Related Allowance Recorded: Unpaid Principal Balance 494 283
With No Related Allowance Recorded: Average Recorded Investment 339 149
With No Related Allowance Recorded: Interest Income Recognized 6 11
With An Allowance Recorded: Recorded Investment 157 427
With An Allowance Recorded: Unpaid Principal Balance 233 445
With An Allowance Recorded: Average Recorded Investment 292 269
With An Allowance Recorded: Interest Income Recognized 2 11
Totals: Recorded Investment 555 706
Totals: Unpaid Principal Balance 727 728
Totals: Related Allowance 112 255
Totals: Average Recorded Investment 631 418
Totals: Interest Income Recognized 8 22
Residential Mortgages [Member]    
Financing Receivable, Impaired [Line Items]    
With No Related Allowance Recorded: Recorded Investment 1,459 1,580
With No Related Allowance Recorded: Unpaid Principal Balance 1,538 1,673
With No Related Allowance Recorded: Average Recorded Investment 1,520 1,568
With No Related Allowance Recorded: Interest Income Recognized 19 63
With An Allowance Recorded: Recorded Investment 197 151
With An Allowance Recorded: Unpaid Principal Balance 204 178
With An Allowance Recorded: Average Recorded Investment 174 425
With An Allowance Recorded: Interest Income Recognized   3
Totals: Recorded Investment 1,656 1,731
Totals: Unpaid Principal Balance 1,742 1,851
Totals: Related Allowance 35 4
Totals: Average Recorded Investment 1,694 1,993
Totals: Interest Income Recognized 19 66
Residential Consumer Construction [Member]    
Financing Receivable, Impaired [Line Items]    
With No Related Allowance Recorded: Recorded Investment  
With No Related Allowance Recorded: Unpaid Principal Balance  
With No Related Allowance Recorded: Average Recorded Investment  
With No Related Allowance Recorded: Interest Income Recognized  
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  
Totals: Unpaid Principal Balance  
Totals: Related Allowance  
Totals: Average Recorded Investment  
Totals: Interest Income Recognized  
Commercial [Member]    
Financing Receivable, Impaired [Line Items]    
With No Related Allowance Recorded: Recorded Investment 768 925
With No Related Allowance Recorded: Unpaid Principal Balance 788 1,505
With No Related Allowance Recorded: Average Recorded Investment 847 812
With No Related Allowance Recorded: Interest Income Recognized 8 54
With An Allowance Recorded: Recorded Investment 438 317
With An Allowance Recorded: Unpaid Principal Balance 846 323
With An Allowance Recorded: Average Recorded Investment 378 919
With An Allowance Recorded: Interest Income Recognized 4 16
Totals: Recorded Investment 1,206 1,242
Totals: Unpaid Principal Balance 1,634 1,828
Totals: Related Allowance 134 112
Totals: Average Recorded Investment 1,225 1,731
Totals: Interest Income Recognized $ 12 $ 70