XML 19 R51.htm IDEA: XBRL DOCUMENT
v3.20.1

Securities (Narrative) (Details) | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) security item | Dec. 31, 2018 USD ($)
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Available-for-sale Securities Pledged as Collateral | $ 22,307,000 | $ 19,401,000
Available-for-sale Securities | 59,655,000 | 52,727,000
Reportable Legal Entities [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Available-for-sale Securities, Gross Realized Losses | 394,000 | 0
Available-for-sale Securities | 9,733,000 | 0
US Treasuries [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Available-for-sale Securities | 1,964,000 | 1,845,000
US Agency Obligations [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Available-for-sale Securities | 32,108,000 | 23,267,000
Municipals [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Available-for-sale Securities | 11,222,000 | 12,009,000
Corporates [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Available-for-sale Securities | $ 4,097,000 | $ 3,730,000
S&P Rated AA [Member] | Mortgage Backed Securities, Other [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Number Of Securities Held | security | 8 |
S&P Rated AA [Member] | US Agency Obligations [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Number Of Securities Held | item | 14 |
S&P Rated A [Member] | Municipals [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Number Of Securities Held | item | 4 |

X
- Definition Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] + References No definition available. + Details
Name: | botj_NumberOfSecuritiesEvaluatedForOtherThanTemporaryImpairmentLineItems
Namespace Prefix: | botj_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Securities Held + References No definition available. + Details
Name: | botj_NumberOfSecuritiesHeld
Namespace Prefix: | botj_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleRestricted
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | srt_ConsolidationItemsAxis=srt_ReportableLegalEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CreditRatingStandardPoorsAxis=srt_StandardPoorsAARatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CreditRatingStandardPoorsAxis=srt_StandardPoorsARatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |