XML 66 R55.htm IDEA: XBRL DOCUMENT v3.20.2

Goodwill (Details) - USD ($) $ in Thousands			9 Months Ended
	Jun. 05, 2020	Mar. 15, 2019	Sep. 30, 2020	Sep. 30, 2019
Goodwill (Details) [Line Items]
Acquisition resulted in goodwill			$ 4,325	$ 1,439
SBFG Title, LLC [Member]
Goodwill (Details) [Line Items]
Acquisition resulted in goodwill		$ 1,400
Edon State Bank Company [Member]
Goodwill (Details) [Line Items]
Acquisition resulted in goodwill	$ 4,300

X

- References

No definition available.

+ Details

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

X

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	srt_TitleOfIndividualAxis=sbfg_SBFGTitleLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sbfg_EdonStateBankCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: