XML 42 R57.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Loans and Allowance for Loan Losses (Details) - Summary loan commitments, unused lines of credit and standby letters of credit - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Loans and Allowance for Loan Losses (Details) - Summary loan commitments, unused lines of credit and standby letters of credit [Line Items] |  |
Letters of credit outstanding, Amount | $ 190,512 | $ 170,876
Unused lines of Credit [Member] |  |
Loans and Allowance for Loan Losses (Details) - Summary loan commitments, unused lines of credit and standby letters of credit [Line Items] |  |
Letters of credit outstanding, Amount | 187,855 | 168,731
Standby Letters of Credit [Member] |  |
Loans and Allowance for Loan Losses (Details) - Summary loan commitments, unused lines of credit and standby letters of credit [Line Items] |  |
Letters of credit outstanding, Amount | $ 2,657 | $ 2,145

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

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_UnusedLinesOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |