XML 50 R39.htm IDEA: XBRL DOCUMENT v3.19.1

Loans and Allowance for Loan Losses (Details 5) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019 USD ($) Loans	Dec. 31, 2018 USD ($) Loans
TDR activity
Recorded Balance	$ 763	$ 102
Number of Loans | Loans	3	2
Interest Only	$ 150
Term	613
Combination
Total Modification	763
Commercial & industrial [Member]
TDR activity
Recorded Balance	$ 763
Number of Loans | Loans	3
Interest Only	$ 150
Term	613
Combination
Total Modification	$ 763
Residential Real Estate [Member]
TDR activity
Recorded Balance		$ 102
Number of Loans | Loans		2

X

- Definition

The amount of modification amount.

+ References

No definition available.

+ Details

Name:	sbfg_ModificationsTermAmount
Namespace Prefix:	sbfg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the number of loans.

+ References

No definition available.

+ Details

Name:	sbfg_NumberOfLoans
Namespace Prefix:	sbfg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Property value.

+ References

No definition available.

+ Details

Name:	sbfg_PropertyValue
Namespace Prefix:	sbfg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

TDR activity combination.

+ References

No definition available.

+ Details

Name:	sbfg_TdrCombination
Namespace Prefix:	sbfg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

TDR total modifications.

+ References

No definition available.

+ Details

Name:	sbfg_TotalModifications
Namespace Prefix:	sbfg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	sbfg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialAndIndustrialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: