XML 70 R59.htm IDEA: XBRL DOCUMENT v3.21.2

Derivative Financial Instruments (Details) - Schedule of consolidated statements of income for non-hedging derivative financial instruments - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest rate swap contracts [Member]
Condensed Financial Statements, Captions [Line Items]
Statement of income classification			Other income
Amount of gain (loss)		$ 54	$ 133	$ 282
IRLCs [Member]
Condensed Financial Statements, Captions [Line Items]
Statement of income classification			Gain on sale of mortgage loans & OMSR
Amount of gain (loss)	(239)	(102)	$ (397)	235
Forward contracts [Member]
Condensed Financial Statements, Captions [Line Items]
Statement of income classification			Gain on sale of mortgage loans & OMSR
Amount of gain (loss)	$ 393	$ 195	$ 550	$ (165)

X

- Definition

Statement of income classification.

+ References

No definition available.

+ Details

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

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	srt_CondensedFinancialStatementsCaptionsLineItems
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959

+ Details

Name:	us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=sbfg_InterestRateSwapContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=sbfg_IRLCsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForwardContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: