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v3.22.1

Basis of Presentation (Narrative) (Details) | 3 Months Ended
--- | ---
Mar. 31, 2022 item
Number of jurisdictions | 7
Customer Relationships [Member] |
Finite-Lived Intangible Asset, Useful Life | 15 years

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- Definition Number of jurisdictions + References No definition available. + Details
Name: | botj_NumberOfJurisdictions
Namespace Prefix: | botj_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |