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Summary Of Significant Accounting Policies (Narrative) (Details)
 12 Months Ended
Dec. 31, 2018
USD ($)
segment
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Dec. 31, 2017
USD ($)
shares
Summary Of Significant Accounting Policies [Line Items]    
Maximum maturing period for cash and cash equivalents 90 days  
Duration of loans interest stops accruing 90 days  
Duration of consecutive payments before future payments assured 6 months  
Duration of consumer term loans charged-off 120 days  
Duration of consumer revolving credit loans charged-off 180 days  
Impaired loans TDR $ 424,000 $ 440,000
Minimum principal loan balance for individual impairment test 100,000,000  
Unrecognized tax liabilities $ 0 $ 0
Number of reportable segments | segment 2  
Outstanding options | shares 636
Advertising expense $ 611,000 $ 739,000
Equipment [Member] | Maximum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful life 7 years  
Equipment [Member] | Minimum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful life 3 years  
Building and Building Improvements [Member] | Maximum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful life 39 years 6 months  
Building and Building Improvements [Member] | Minimum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Estimated useful life 10 years  
1999 Stock Option Plan [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Outstanding options | shares 0  
2018 Bank Of The James Financial Group, Inc. Equity Incentive Plan [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Number of options granted | shares 0