XML 62 R51.htm IDEA: XBRL DOCUMENT
v3.20.2

Accounting for Certain Loans Acquired in a Transfer (Details) $ in Millions | Sep. 30, 2020 USD ($)
--- | ---
Accounting For Certain Loans Acquired In A Transfer [Abstract] |
Amount of accretable yield or income expected to be collected | $ 0.4

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

X
- Definition The aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References No definition available. + Details
Name: | us-gaap_CertainLoansAcquiredInTransferAccretableYield
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant