XML 57 R47.htm IDEA: XBRL DOCUMENT
v3.23.2

Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | $ 15,442 | $ 13,804 | $ 13,818 | $ 13,805 | $ 13,805
Impact of Adopting ASC 326 |  |  | 1,372 |  |
Chargeoffs | (32) | (9) | (101) | (18) | (34)
Recoveries | 10 | 6 | 18 | 14 | 47
Provision for Credit Losses | 375 |  | 688 |  |
Balance, end of period | 15,795 | 13,801 | 15,795 | 13,801 | 13,818
Commercial & industrial [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 1,965 |  |  |  |
Impact of Adopting ASC 326 |  |  |  |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses | (8) |  |  |  |
Balance, end of period | 1,957 |  | 1,957 |  |
Commercial real estate - owner occupied [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 1,795 |  |  |  |
Impact of Adopting ASC 326 |  |  |  |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses | 102 |  |  |  |
Balance, end of period | 1,897 |  | 1,897 |  |
Commercial real estate - nonowner occupied [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 5,841 |  |  |  |
Impact of Adopting ASC 326 |  |  |  |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses | (58) |  |  |  |
Balance, end of period | 5,783 |  | 5,783 |  |
Agricultural [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 403 |  |  |  |
Impact of Adopting ASC 326 |  |  |  |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses | 5 |  |  |  |
Balance, end of period | 408 |  | 408 |  |
Residential real estate [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 4,692 |  |  |  |
Impact of Adopting ASC 326 |  |  |  |  |
Chargeoffs | (21) |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses | 314 |  |  |  |
Balance, end of period | 4,985 |  | 4,985 |  |
HELOC [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 495 |  |  |  |
Impact of Adopting ASC 326 |  |  |  |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses | 28 |  |  |  |
Balance, end of period | 523 |  | 523 |  |
Consumer [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance | 251 |  |  |  |
Impact of Adopting ASC 326 |  |  |  |  |
Chargeoffs | (11) |  |  |  |
Recoveries | 10 |  |  |  |
Provision for Credit Losses | (8) |  |  |  |
Balance, end of period | 242 |  | 242 |  |
Commercial & industrial [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  | 1,663 |  |
Impact of Adopting ASC 326 |  |  | 230 |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  | 64 |  |
Balance, end of period | 1,957 |  | 1,957 |  | 1,663
Commercial real estate - owner occupied [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  | 1,696 |  |
Impact of Adopting ASC 326 |  |  | 54 |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  | 147 |  |
Balance, end of period | 1,897 |  | 1,897 |  | 1,696
Commercial real estate - nonowner occupied [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  | 4,584 |  |
Impact of Adopting ASC 326 |  |  | 1,015 |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  | 184 |  |
Balance, end of period | 5,783 |  | 5,783 |  | 4,584
Agricultural [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  | 611 |  |
Impact of Adopting ASC 326 |  |  | (194) |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  | (9) |  |
Balance, end of period | 408 |  | 408 |  | 611
Residential real estate [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  | 4,438 |  |
Impact of Adopting ASC 326 |  |  | 360 |  |
Chargeoffs |  |  | (53) |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  | 240 |  |
Balance, end of period | 4,985 |  | 4,985 |  | 4,438
HELOC [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  | 547 |  |
Impact of Adopting ASC 326 |  |  | (76) |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  | 52 |  |
Balance, end of period | 523 |  | 523 |  | 547
Consumer [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  | 279 |  |
Impact of Adopting ASC 326 |  |  | (17) |  |
Chargeoffs |  |  | (48) |  |
Recoveries |  |  | 18 |  |
Provision for Credit Losses |  |  | 10 |  |
Balance, end of period | $ 242 |  | 242 |  | 279
Commercial & industrial [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  | 1,892 |  |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  | (64) |  |  |
Balance, end of period |  | 1,828 |  | 1,828 |
Commercial real estate - owner occupied [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  | 2,564 |  |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  |  |  |
Balance, end of period |  | 2,564 |  | 2,564 |
Commercial real estate - nonowner occupied [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  | 4,319 |  |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  | (212) |  |  |
Balance, end of period |  | 4,107 |  | 4,107 |
Agricultural [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  | 547 |  |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  | 13 |  |  |
Balance, end of period |  | 560 |  | 560 |
Residential real estate [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  | 3,502 |  |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  | 249 |  |  |
Balance, end of period |  | 3,751 |  | 3,751 |
HELOC [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  | 534 |  |  |
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  |  |  |
Balance, end of period |  | 534 |  | 534 |
Consumer [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  | 446 |  |  |
Chargeoffs |  | (9) |  |  |
Recoveries |  | 6 |  |  |
Provision for Credit Losses |  | 14 |  |  |
Balance, end of period |  | 457 |  | 457 |
Commercial & industrial [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  |  | 1,890 | 1,890
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  |  | (62) |
Balance, end of period |  | 1,828 |  | 1,828 |
Commercial real estate - owner occupied [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  |  | 2,564 | 2,564
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  |  |  |
Balance, end of period |  | 2,564 |  | 2,564 |
Commercial real estate - nonowner occupied [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  |  | 4,217 | 4,217
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  |  | (110) |
Balance, end of period |  | 4,107 |  | 4,107 |
Agricultural [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  |  | 599 | 599
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  |  | (39) |
Balance, end of period |  | 560 |  | 560 |
Residential real estate [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  |  | 3,515 | 3,515
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  |  | 236 |
Balance, end of period |  | 3,751 |  | 3,751 |
HELOC [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  |  | 579 | 579
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  |  | (45) |
Balance, end of period |  | 534 |  | 534 |
Consumer [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  |  | 441 | 441
Chargeoffs |  |  |  | (18) |
Recoveries |  |  |  | 14 |
Provision for Credit Losses |  |  |  | 20 |
Balance, end of period |  | $ 457 |  | 457 |
Commercial & industrial [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  | 1,663 | 1,890 | 1,890
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  |  |  | (227)
Balance, end of period |  |  |  |  | 1,663
Commercial real estate - owner occupied [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  | 1,696 | 2,564 | 2,564
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  |  |  | (868)
Balance, end of period |  |  |  |  | 1,696
Commercial real estate - nonowner occupied [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  | 4,584 | 4,217 | 4,217
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  |  |  | 367
Balance, end of period |  |  |  |  | 4,584
Agricultural [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  | 611 | 599 | 599
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  |  |  | 12
Balance, end of period |  |  |  |  | 611
Residential real estate [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  | 4,438 | 3,515 | 3,515
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  |  |  | 923
Balance, end of period |  |  |  |  | 4,438
HELOC [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  | 547 | 579 | 579
Chargeoffs |  |  |  |  | (34)
Recoveries |  |  |  |  | 47
Provision for Credit Losses |  |  |  |  | (45)
Balance, end of period |  |  |  |  | 547
Consumer [Member] |  |  |  |  |
Loans and Allowance for Credit Losses (Details) - Schedule of Activity Related to The Allowance for Credit Losses [Line Items] |  |  |  |  |
Beginning balance |  |  | $ 279 | $ 441 | 441
Chargeoffs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for Credit Losses |  |  |  |  | (162)
Balance, end of period |  |  |  |  | $ 279

X
- Definition Impact of adopting ASC 326. + References No definition available. + Details
Name: | sbfg_ImpactOfAdoptingASC326
Namespace Prefix: | sbfg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | sbfg_LoansandAllowanceforCreditLossesDetailsScheduleofActivityRelatedtoTheAllowanceforCreditLossesLineItems
Namespace Prefix: | sbfg_
Data Type: | xbrli:stringItemType
Balance Type: | na
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 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 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) -Publisher SEC Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) -Publisher SEC 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 -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 6: 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//1943274/2147479853/942-210-S99-1 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(1) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B Reference 8: 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 9: 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 + 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/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 2: 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 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(4) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B + 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/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 2: 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 Reference 3: 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 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(3) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B + 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 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 Reference 3: 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//1943274/2147483589/942-220-S99-1 + Details
Name: | us-gaap_ProvisionForOtherLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialRealEstateOwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_WithNoRelatedAllowanceRecordedCommercialRealEstateNonownerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_AgriculturalMember
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: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_HELOCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_ConsumerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialIndustrialOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialRealEstateOwnerOccupiedOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialRealEstateNonownerOccupiedOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_AgriculturalOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_ResidentialRealEstateOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_HELOCOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_ConsumerOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialIndustrialTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialRealEstateOwnerOccupiedTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialRealEstateNonownerOccupiedTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_AgriculturalTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_ResidentialRealEstateTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_HELOCTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_ConsumerTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialIndustrialThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialRealEstateOwnerOccupiedThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialRealEstateNonownerOccupiedThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_AgriculturalThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_ResidentialRealEstateThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_HELOCThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_ConsumerThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialIndustrialFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialRealEstateOwnerOccupiedFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_CommercialRealEstateNonownerOccupiedFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_AgriculturalFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_ResidentialRealEstateFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_HELOCFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sbfg_ConsumerFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |