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Loans, Allowance For Loan Losses And OREO (Allowance For Loan Losses And Recorded Investment In Loans) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]      
Allowance for Credit Losses: Beginning Balance $ 4,752 $ 5,716 $ 5,716
Allowance for Credit Losses: Charge-offs (240)   (2,094)
Allowance for Credit Losses: Recoveries 137   137
Allowance for credit losses: Provision 22 100 993
Allowance for Credit Losses: Ending Balance 4,671   4,752
Allowance for Credit Losses: Ending Balance: Individually evaluated for impairment 383   563
Allowance for Credit Losses: Ending Balance: Collectively evaluated for impairment 4,288   4,189
Allowance for Credit Losses: Totals 4,671   4,752
Financing Receivables: Ending Balance: Individually evaluated for impairment 6,865   7,690
Financing Receivables: Ending Balance: Collectively evaluated for impairment 499,683   488,084
Total loans [1] 506,548   495,774
Commercial [Member]      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Allowance for Credit Losses: Beginning Balance 1,264 2,192 2,192
Allowance for Credit Losses: Charge-offs (13)   (1,652)
Allowance for Credit Losses: Recoveries 98   6
Allowance for credit losses: Provision 56   718
Allowance for Credit Losses: Ending Balance 1,405   1,264
Allowance for Credit Losses: Ending Balance: Individually evaluated for impairment 134   112
Allowance for Credit Losses: Ending Balance: Collectively evaluated for impairment 1,271   1,152
Allowance for Credit Losses: Totals 1,405   1,264
Financing Receivables: Ending Balance: Individually evaluated for impairment 1,206   1,242
Financing Receivables: Ending Balance: Collectively evaluated for impairment 95,777   94,885
Total loans 96,983   96,127
Commercial Real Estate [Member]      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Allowance for Credit Losses: Beginning Balance 1,738 2,109 2,109
Allowance for Credit Losses: Charge-offs (82)   (91)
Allowance for Credit Losses: Recoveries     41
Allowance for credit losses: Provision (72)   (321)
Allowance for Credit Losses: Ending Balance 1,584   1,738
Allowance for Credit Losses: Ending Balance: Individually evaluated for impairment 100   190
Allowance for Credit Losses: Ending Balance: Collectively evaluated for impairment 1,484   1,548
Allowance for Credit Losses: Totals 1,584   1,738
Financing Receivables: Ending Balance: Individually evaluated for impairment 3,446   4,009
Financing Receivables: Ending Balance: Collectively evaluated for impairment 258,173   247,798
Total loans 261,619   251,807
Consumer [Member]      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Allowance for Credit Losses: Beginning Balance 1,172 954 954
Allowance for Credit Losses: Charge-offs (145)   (246)
Allowance for Credit Losses: Recoveries 39   51
Allowance for credit losses: Provision (3)   413
Allowance for Credit Losses: Ending Balance 1,063   1,172
Allowance for Credit Losses: Ending Balance: Individually evaluated for impairment 114   257
Allowance for Credit Losses: Ending Balance: Collectively evaluated for impairment 949   915
Allowance for Credit Losses: Totals 1,063   1,172
Financing Receivables: Ending Balance: Individually evaluated for impairment 557   708
Financing Receivables: Ending Balance: Collectively evaluated for impairment 84,519   83,038
Total loans 85,076   83,746
Residential Real Estate [Member]      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Allowance for Credit Losses: Beginning Balance 578 $ 461 461
Allowance for Credit Losses: Charge-offs     (105)
Allowance for Credit Losses: Recoveries     39
Allowance for credit losses: Provision 41   183
Allowance for Credit Losses: Ending Balance 619   578
Allowance for Credit Losses: Ending Balance: Individually evaluated for impairment 35   4
Allowance for Credit Losses: Ending Balance: Collectively evaluated for impairment 584   574
Allowance for Credit Losses: Totals 619   578
Financing Receivables: Ending Balance: Individually evaluated for impairment 1,656   1,731
Financing Receivables: Ending Balance: Collectively evaluated for impairment 61,214   62,363
Total loans $ 62,870   $ 64,094
[1] Includes net deferred costs and premiums of $764 and $940 as of March 31, 2018 and December 31, 2017, respectively.