XML 62 R51.htm IDEA: XBRL DOCUMENT v3.25.3

Loans and Allowance for Credit Losses - Schedule of Activity Related to the Allowance for Credit Losses (ACL) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Schedule of Activity Related to the Allowance for Credit Losses (ACL) [Line Items]
Balance, beginning of period	$ 15,645	$ 15,612	$ 15,096	$ 15,786	$ 15,786
Initial allowance for credit losses on acquired PCD loans			5
Chargeoffs	(11)	(29)	(146)	(95)	(289)
Recoveries	9	2	14	27	39
Provision (benefit) for Credit Losses	300	(307)	974	(440)	(440)
Balance, end of period	15,943	15,278	15,943	15,278	15,096
Commercial & industrial [Member]
Schedule of Activity Related to the Allowance for Credit Losses (ACL) [Line Items]
Balance, beginning of period	1,928	2,755	2,666	2,003	2,003
Initial allowance for credit losses on acquired PCD loans			5
Chargeoffs			(61)	(42)	(233)
Recoveries				6	5
Provision (benefit) for Credit Losses	(16)	(179)	(698)	609	891
Balance, end of period	1,912	2,576	1,912	2,576	2,666
Commercial real estate - owner occupied [Member]
Schedule of Activity Related to the Allowance for Credit Losses (ACL) [Line Items]
Balance, beginning of period	1,837	1,967	1,806	1,952	1,952
Initial allowance for credit losses on acquired PCD loans
Chargeoffs
Recoveries
Provision (benefit) for Credit Losses	63	(130)	94	(115)	(146)
Balance, end of period	1,900	1,837	1,900	1,837	1,806
Commercial real estate - nonowner occupied [Member]
Schedule of Activity Related to the Allowance for Credit Losses (ACL) [Line Items]
Balance, beginning of period	6,533	5,449	5,721	5,718	5,718
Initial allowance for credit losses on acquired PCD loans
Chargeoffs
Recoveries			2
Provision (benefit) for Credit Losses	170	82	980	(187)	3
Balance, end of period	6,703	5,531	6,703	5,531	5,721
Agricultural [Member]
Schedule of Activity Related to the Allowance for Credit Losses (ACL) [Line Items]
Balance, beginning of period	244	912	884	440	440
Initial allowance for credit losses on acquired PCD loans
Chargeoffs
Recoveries
Provision (benefit) for Credit Losses	8	(48)	(632)	424	444
Balance, end of period	252	864	252	864	884
Residential real estate [Member]
Schedule of Activity Related to the Allowance for Credit Losses (ACL) [Line Items]
Balance, beginning of period	4,247	3,798	3,330	4,936	4,936
Initial allowance for credit losses on acquired PCD loans
Chargeoffs					(3)
Recoveries
Provision (benefit) for Credit Losses	(33)	(52)	884	(1,190)	(1,603)
Balance, end of period	4,214	3,746	4,214	3,746	3,330
HELOC [Member]
Schedule of Activity Related to the Allowance for Credit Losses (ACL) [Line Items]
Balance, beginning of period	633	534	520	510	510
Initial allowance for credit losses on acquired PCD loans
Chargeoffs			(4)
Recoveries	3		3
Provision (benefit) for Credit Losses	34	11	151	35	10
Balance, end of period	670	545	670	545	520
Consumer [Member]
Schedule of Activity Related to the Allowance for Credit Losses (ACL) [Line Items]
Balance, beginning of period	223	197	169	227	227
Initial allowance for credit losses on acquired PCD loans
Chargeoffs	(11)	(29)	(81)	(53)	(53)
Recoveries	6	2	9	21	34
Provision (benefit) for Credit Losses	74	9	195	(16)	(39)
Balance, end of period	$ 292	$ 179	$ 292	$ 179	$ 169

X

- Definition

Initial allowance for credit losses on acquired PCD loans.

+ References

No definition available.

+ Details

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

X

- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (1)
-Publisher SEC

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (3)
-Publisher SEC

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of increase in allowance for credit loss on financing receivable from recovery.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
-Subparagraph (c)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

+ Details

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

X

- Definition

Amount of writeoff of financing receivable, charged against allowance for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

+ Details

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

X

- Definition

Amount of expense related to other loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(14))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

+ Details

Name:	us-gaap_ProvisionForOtherLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_SecuritiesBorrowedAllowanceForCreditLossLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_CommercialAndIndustrialSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=sbfg_WithNoRelatedAllowanceRecordedCommercialRealEstateNonownerOccupiedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_AgriculturalSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_HomeEquityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_ConsumerSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: