XML 76 R65.htm IDEA: XBRL DOCUMENT
v3.20.2

Trust Preferred Securities (Details) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2020 USD ($)
Trust Preferred Securities [Abstract] |
Trust preferred securities, Description | On September 15, 2005, RST II, a wholly-owned subsidiary of the Company, closed a pooled private offering of 10,000 Capital Securities with a liquidation amount of $1,000 per security. The proceeds of the offering were loaned to the Company in exchange for junior subordinated debentures with terms similar to the Capital Securities. Distributions on the Capital Securities are payable quarterly at a variable rate that is based upon the 3-month LIBOR plus 1.80 percent and are included in interest expense in the consolidated financial statements. These securities may be included in Tier 1 capital and may be prepaid at any time without penalty (with certain limitations applicable) under current regulatory guidelines and interpretations
Maturity date of capital securities | Sep. 15, 2035
Capital securities | $ 10.3

X
- Definition Maturity date of capital securities. + References No definition available. + Details
Name: | sbfg_MaturityDateOfCapitalSecurities
Namespace Prefix: | sbfg_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Description of trust preferred securities. + References No definition available. + Details
Name: | sbfg_TrustPreferredSecuritiesDescription
Namespace Prefix: | sbfg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Interest expense incurred during the reporting period on capital securities issued by the reporting entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.8) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
Name: | us-gaap_InterestExpenseCapitalSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration