XML 76 R60.htm IDEA: XBRL DOCUMENT
v3.20.4

Available-for-Sale Securities (Details) - Summary of securities with unrealized losses - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Available-for-Sale Securities (Details) - Summary of securities with unrealized losses [Line Items] |  |
Less than 12 Months, Fair Value | $ 26,582 | $ 31,903
Less than 12 Months, Unrealized Losses | (54) | (159)
12 Months or Longer, Fair Value | 717 | 6,862
12 Months or Longer, Unrealized Losses | (3) | (46)
Total Fair Value | 27,299 | 38,765
Total Unrealized Losses | (57) | (205)
U.S. Treasury and Government agencies [Member] |  |
Available-for-Sale Securities (Details) - Summary of securities with unrealized losses [Line Items] |  |
Less than 12 Months, Fair Value |  | 872
Less than 12 Months, Unrealized Losses |  | (1)
12 Months or Longer, Fair Value |  | 2,598
12 Months or Longer, Unrealized Losses |  | (1)
Total Fair Value |  | 3,470
Total Unrealized Losses |  | (2)
Mortgage-backed securities [Member] |  |
Available-for-Sale Securities (Details) - Summary of securities with unrealized losses [Line Items] |  |
Less than 12 Months, Fair Value | 26,582 | 30,692
Less than 12 Months, Unrealized Losses | (54) | (157)
12 Months or Longer, Fair Value | 717 | 4,264
12 Months or Longer, Unrealized Losses | (3) | (45)
Total Fair Value | 27,299 | 34,956
Total Unrealized Losses | (57) | (202)
State and political subdivisions [Member] |  |
Available-for-Sale Securities (Details) - Summary of securities with unrealized losses [Line Items] |  |
Less than 12 Months, Fair Value |  | 339
Less than 12 Months, Unrealized Losses |  | (1)
12 Months or Longer, Fair Value |  |
12 Months or Longer, Unrealized Losses |  |
Total Fair Value |  | 339
Total Unrealized Losses |  | $ (1)
Other corporate securities [Member] |  |
Available-for-Sale Securities (Details) - Summary of securities with unrealized losses [Line Items] |  |
Less than 12 Months, Fair Value |  |
Less than 12 Months, Unrealized Losses |  |
12 Months or Longer, Fair Value |  |
12 Months or Longer, Unrealized Losses |  |
Total Fair Value |  |
Total Unrealized Losses |  |

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

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922890-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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

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