XML 113 R96.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Regulatory Matters (Details) | 12 Months Ended
--- | ---
Dec. 31, 2023
Regulatory Matters [Abstract] |
Minimum conservation buffer | 2.50%

X
- Definition Capital conservation buffer percentage. + References No definition available. + Details
Name: | sbfg_CapitalConservationBufferPhaseInRate
Namespace Prefix: | sbfg_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

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