XML 68 R53.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Securities (Narrative) (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) security item | Dec. 31, 2016 USD ($)
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Available-for-sale Securities | $ 55,312 | $ 40,776
Available-for-sale Securities Pledged as Collateral | 12,123 | 11,756
Reportable Legal Entities [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Available-for-sale Securities | 9,940 | 24,637
Available-for-sale Securities, Gross Realized Gains | 113 | 487
Available-for-sale Securities, Gross Realized Losses | 0 | 0
US Treasuries [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Available-for-sale Securities | 1,858 | 1,833
US Agency Obligations [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Available-for-sale Securities | 23,850 | 13,113
Municipals [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Available-for-sale Securities | 12,274 | 9,947
Corporates [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Available-for-sale Securities | $ 3,942 | $ 3,878
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 | 11 |
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 | 21 |
S&P Rated AA [Member] | Municipals [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Number Of Securities Held | item | 17 |
S&P Rated AA [Member] | Corporates [Member] |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |
Number Of Securities Held | security | 5 |

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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562 + 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 profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The fair value of available-for-sale securities that serve as collateral for borrowings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5086-111524 + Details
Name: | us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_ReportableLegalEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

X
- Details
Name: | us-gaap_CreditRatingStandardPoorsAxis=us-gaap_StandardPoorsAARatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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