XML 20 R10.htm IDEA: XBRL DOCUMENT
v3.19.2

Restriction on Cash and Due from Banks | 6 Months Ended
--- | ---
Jun. 30, 2019
Restriction on Cash and Due from Banks [Abstract] |
Restriction on Cash and Due from Banks |
Note 3: | Restriction on Cash and Due from Banks
The Company is required to maintain reserve funds in cash and/or on deposit with the Federal Reserve Bank. The reserve required at June 30, 2019 was $15.6 million.

X
- References No definition available. + Details
Name: | bsvn_RestrictionOnCashAndDueFromBanksAbstract
Namespace Prefix: | bsvn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for restriction on cash and due from banks. + References No definition available. + Details
Name: | bsvn_RestrictionOnCashAndDueFromBanksTextBlock
Namespace Prefix: | bsvn_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration