XML 100 R74.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Trust Preferred Securities (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2016
Trust Preferred Securities (Textual) |  |
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 anytime without penalty (with certain limitations applicable) under current regulatory guidelines and interpretations. |
Capital Securities | $ 10.3 | $ 10.3
Capital securities maturity date | Sep. 15, 2035 |

X
- Definition The amount of capital securities issued. + References No definition available. + Details
Name: | sbfg_CapitalSecurities
Namespace Prefix: | sbfg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Date of maturity of a security categorized as held-to-maturity, in CCYY-MM-DD format. + References No definition available. + Details
Name: | sbfg_CapitalSecuritiesMaturityDate
Namespace Prefix: | sbfg_
Data Type: | xbrli:dateItemType
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
- References No definition available. + Details
Name: | sbfg_TrustPreferredSecuritiesTextualAbstract
Namespace Prefix: | sbfg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration