XML 26 R12.htm IDEA: XBRL DOCUMENT v3.19.1

Restrictions On Cash	12 Months Ended
	Dec. 31, 2018
Restrictions On Cash [Abstract]
Restrictions On Cash	Note 3 - Restrictions on cash To comply with Federal Reserve regulations, the Bank is required to maintain certain average cash reserve balances. The daily average cash reserve requirements were approximately $11,279 and $6,733 for the weeks including December 31, 2018 and 2017, respectively.

X

- Definition

Restrictions On Cash Disclosure [Text Block]

+ References

No definition available.

+ Details

Name:	botj_RestrictionsOnCashDisclosureTextBlock
Namespace Prefix:	botj_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_CashAndCashEquivalentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration