XML 59 R48.htm IDEA: XBRL DOCUMENT
v3.19.2

Fair Value of Assets and Liabilities (Details 2) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018
Mortgage servicing rights [Member] | T and I Earnings Credit [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Unobservable Inputs | T&I earnings credit | T&I earnings credit
Fair Value Measurements, Weighted Ave Range | 2.15% |
Fair Value Measurements, Range |  | 3.02%
Mortgage servicing rights [Member] | Discount Rate [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | $ 6,829 | $ 3,191
Fair Value Measurements, Valuation Technique | Discounted cash flow | Discounted cash flow
Fair Value Measurements, Unobservable Inputs | Discount Rate | Discount Rate
Fair Value Measurements, Weighted Ave Range | 9.31% |
Fair Value Measurements, Range |  | 10.30%
Mortgage servicing rights [Member] | Inflation For Cost Of Servicing [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Unobservable Inputs | Inflation for cost of servicing | Inflation for cost of servicing
Fair Value Measurements, Weighted Ave Range | 1.50% |
Fair Value Measurements, Range |  | 1.50%
Mortgage servicing rights [Member] | P and I Earnings Credit [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Unobservable Inputs | P&I earnings credit | P&I earnings credit
Fair Value Measurements, Weighted Ave Range | 2.40% |
Fair Value Measurements, Range |  | 2.51%
Mortgage servicing rights [Member] | Constant Prepayment Rate [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Unobservable Inputs | Constant prepayment rate | Constant prepayment rate
Fair Value Measurements, Weighted Ave Range | 11.18% |
Fair Value Measurements, Range |  | 7.02%
Collateral-dependent impaired loans [Member] | Comparability Adjustments Percent [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | $ 582 | $ 1,027
Fair Value Measurements, Valuation Technique | Market comparable properties | Market comparable properties
Fair Value Measurements, Unobservable Inputs | Comparability adjustments (%) | Comparability adjustments (%)
Fair Value Measurements, Weighted Ave Range | 19.00% |
Fair Value Measurements, Range |  | 29.00%
Minimum [Member] | Collateral-dependent impaired loans [Member] | Comparability Adjustments Percent [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Weighted Ave Range | 10.00% |
Fair Value Measurements, Range |  | 20.00%
Maximum [Member] | Collateral-dependent impaired loans [Member] | Comparability Adjustments Percent [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Weighted Ave Range | 35.00% |
Fair Value Measurements, Range |  | 35.00%

X
- Definition Reflects the interest rate percentage. + References No definition available. + Details
Name: | sbfg_FairValueInputInterestRate
Namespace Prefix: | sbfg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of the inputs and valuation technique(s) used to measure fair value. + References No definition available. + Details
Name: | sbfg_FairValueMeasurementValuationTechnique
Namespace Prefix: | sbfg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of the unobservable inputs used in the valuation of investment assets by the entity. + References No definition available. + Details
Name: | sbfg_FairValueMeasurementsUnobservableInputDescription
Namespace Prefix: | sbfg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reflects the weighted average range interest rate percentage. + References No definition available. + Details
Name: | sbfg_FairValueMeasurementsWeightedAverageRange
Namespace Prefix: | sbfg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements. + References No definition available. + Details
Name: | sbfg_QuantitativeInformationAboutUnobservableInputsUsedInRecurringAndNonrecurringFairValueMeasurementsAbstract
Namespace Prefix: | sbfg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | sbfg_UnobservableInputsAxis=sbfg_TAndIEarningsCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | sbfg_UnobservableInputsAxis=sbfg_DiscountRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | sbfg_UnobservableInputsAxis=sbfg_InflationForCostOfServicingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | sbfg_UnobservableInputsAxis=sbfg_PAndIEarningsCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | sbfg_UnobservableInputsAxis=sbfg_ConstantPrepaymentRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | sbfg_UnobservableInputsAxis=sbfg_ComparabilityAdjustmentsPercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |