XML 113 R87.htm IDEA: XBRL DOCUMENT v3.10.0.1

Disclosures about Fair Value of Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
U.S. Treasury and Government agencies [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring	$ 18,670	$ 12,708
Mortgage-backed securities [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring	60,943	56,762
State and political subdivisions [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring	11,356	13,250
Equity securities [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring		70
Level 1 [Member] | U.S. Treasury and Government agencies [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring
Level 1 [Member] | Mortgage-backed securities [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring
Level 1 [Member] | State and political subdivisions [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring
Level 1 [Member] | Equity securities [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring
Level 1 [Member] | Interest rate contracts - assets [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring
Level 1 [Member] | Interest rate contracts - liabilities [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring
Level 2 [Member] | U.S. Treasury and Government agencies [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring	18,670	12,708
Level 2 [Member] | Mortgage-backed securities [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring	60,943	56,762
Level 2 [Member] | State and political subdivisions [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring	11,356	13,250
Level 2 [Member] | Equity securities [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring		70
Level 2 [Member] | Interest rate contracts - assets [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring	687	698
Level 2 [Member] | Interest rate contracts - liabilities [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Liabilities, fair value, recurring	(687)	(698)
Level 3 [Member] | U.S. Treasury and Government agencies [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring
Level 3 [Member] | Mortgage-backed securities [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring
Level 3 [Member] | State and political subdivisions [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring
Level 3 [Member] | Equity securities [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring
Level 3 [Member] | Interest rate contracts - assets [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring
Level 3 [Member] | Interest rate contracts - liabilities [Member]
Fair value measurements of securities measured at fair value on a recurring basis
Assets, fair value, recurring

X

- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring 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_AssetFairValueDisclosureRecurring
Namespace Prefix:	sbfg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value measurements of securities measured at fair value on a recurring basis.

+ References

No definition available.

+ Details

Name:	sbfg_FairValueMeasurementsOfSecuritiesMeasuredAtFairValueOnRecurringBasisAbstract
Namespace Prefix:	sbfg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregation of the liabilities reported on the balance sheet measured at fair value on a recurring basis by the entity.

+ References

No definition available.

+ Details

Name:	sbfg_LiabilitiesFairValuesDisclosureRecurring
Namespace Prefix:	sbfg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_EquitySecuritiesMember
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_FinancialInstrumentAxis=sbfg_InterestRateContractAssetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=sbfg_InterestRateContractLiabilitiesMember
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: