XML 88 R73.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Other Borrowings (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Short-term Debt [Line Items] |  |
Reverse repurchase agreements | $ 5,000 |
FHLBA additional credit | 29,132 |
Borrowed amount from FHLBA | 43,600 |
Unsecured Federal Funds Outstanding Amount | 0 | $ 0
Community Bankers Bank [Member] |  |
Short-term Debt [Line Items] |  |
Unsecured federal fund lines | 13,000 |
Available credit | 3,151 |
Zions Bank [Member] |  |
Short-term Debt [Line Items] |  |
Unsecured federal fund lines | 4,000 |
PNC Bank [Member] |  |
Short-term Debt [Line Items] |  |
Unsecured federal fund lines | 6,000 |
Suntrust Bank [Member] |  |
Short-term Debt [Line Items] |  |
Unsecured federal fund lines | 3,000 |
FHLBA [Member] |  |
Short-term Debt [Line Items] |  |
Available credit | $ 156,641 |
Maximum [Member] |  |
Short-term Debt [Line Items] |  |
Period allowed to exchange securities pledged as collateral for funds | 90 days |
Minimum [Member] |  |
Short-term Debt [Line Items] |  |
Period allowed to exchange securities pledged as collateral for funds | 30 days |

X
- Definition Amount of Federal Home Loan Bank (FHLBank) advances to member financial institutions + References No definition available. + Details
Name: | botj_AdditionalFederalHomeLoanBankAdvances
Namespace Prefix: | botj_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Duration Securities Pledged As Collateral In Exchange For Funds + References No definition available. + Details
Name: | botj_DurationSecuritiesPledgedAsCollateralInExchangeForFunds
Namespace Prefix: | botj_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line Of Credit Unsecured Federal Funds + References No definition available. + Details
Name: | botj_LineOfCreditUnsecuredFederalFunds
Namespace Prefix: | botj_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Unsecured Debt Reverse Repurchase Agreements + References No definition available. + Details
Name: | botj_UnsecuredDebtReverseRepurchaseAgreements
Namespace Prefix: | botj_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Unsecured Federal Funds Outstanding Amount + References No definition available. + Details
Name: | botj_UnsecuredFederalFundsOutstandingAmount
Namespace Prefix: | botj_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of Federal Home Loan Bank (FHLBank) advances to member financial institutions. + References No definition available. + Details
Name: | us-gaap_FederalHomeLoanBankAdvances
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cash inflow from a borrowing made from Federal Home Loan Bank. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
Name: | us-gaap_ProceedsFromFederalHomeLoanBankBorrowings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShortTermDebtLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=botj_CommunityBankersBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=botj_ZionsBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=botj_PncBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=botj_SuntrustBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=botj_FhlbaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |