XML 78 R67.htm IDEA: XBRL DOCUMENT
v3.20.2

Fair Value of Assets and Liabilities (Details) - Summary of fair value measurements of assets measured at fair value on a nonrecurring basis - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Impaired Loans [Member] |  |
Fair Value of Assets and Liabilities (Details) - Summary of fair value measurements of assets measured at fair value on a nonrecurring basis [Line Items] |  |
Assets, fair value, nonrecurring | $ 2,457 | $ 2,527
Mortgage Servicing Rights [Member] |  |
Fair Value of Assets and Liabilities (Details) - Summary of fair value measurements of assets measured at fair value on a nonrecurring basis [Line Items] |  |
Assets, fair value, nonrecurring | 8,168 | 5,084
IRLCs [Member] |  |
Fair Value of Assets and Liabilities (Details) - Summary of fair value measurements of assets measured at fair value on a nonrecurring basis [Line Items] |  |
Assets, fair value, nonrecurring | 392 | 55
Fair Value, Inputs, Level 1 [Member] | Impaired Loans [Member] |  |
Fair Value of Assets and Liabilities (Details) - Summary of fair value measurements of assets measured at fair value on a nonrecurring basis [Line Items] |  |
Assets, fair value, nonrecurring |  |
Fair Value, Inputs, Level 1 [Member] | Mortgage Servicing Rights [Member] |  |
Fair Value of Assets and Liabilities (Details) - Summary of fair value measurements of assets measured at fair value on a nonrecurring basis [Line Items] |  |
Assets, fair value, nonrecurring |  |
Fair Value, Inputs, Level 1 [Member] | IRLCs [Member] |  |
Fair Value of Assets and Liabilities (Details) - Summary of fair value measurements of assets measured at fair value on a nonrecurring basis [Line Items] |  |
Assets, fair value, nonrecurring |  |
Fair Value, Inputs, Level 2 [Member] | Impaired Loans [Member] |  |
Fair Value of Assets and Liabilities (Details) - Summary of fair value measurements of assets measured at fair value on a nonrecurring basis [Line Items] |  |
Assets, fair value, nonrecurring |  |
Fair Value, Inputs, Level 2 [Member] | Mortgage Servicing Rights [Member] |  |
Fair Value of Assets and Liabilities (Details) - Summary of fair value measurements of assets measured at fair value on a nonrecurring basis [Line Items] |  |
Assets, fair value, nonrecurring |  |
Fair Value, Inputs, Level 2 [Member] | IRLCs [Member] |  |
Fair Value of Assets and Liabilities (Details) - Summary of fair value measurements of assets measured at fair value on a nonrecurring basis [Line Items] |  |
Assets, fair value, nonrecurring |  |
Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member] |  |
Fair Value of Assets and Liabilities (Details) - Summary of fair value measurements of assets measured at fair value on a nonrecurring basis [Line Items] |  |
Assets, fair value, nonrecurring | 2,457 | 2,527
Fair Value, Inputs, Level 3 [Member] | Mortgage Servicing Rights [Member] |  |
Fair Value of Assets and Liabilities (Details) - Summary of fair value measurements of assets measured at fair value on a nonrecurring basis [Line Items] |  |
Assets, fair value, nonrecurring | 8,168 | 5,084
Fair Value, Inputs, Level 3 [Member] | IRLCs [Member] |  |
Fair Value of Assets and Liabilities (Details) - Summary of fair value measurements of assets measured at fair value on a nonrecurring basis [Line Items] |  |
Assets, fair value, nonrecurring | $ 392 | $ 55

X
- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
Name: | sbfg_AssetFairValueDisclosureNonrecurring
Namespace Prefix: | sbfg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=sbfg_ImpairedLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=sbfg_MortgageServicingRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=sbfg_IRLCsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |