XML 17 R6.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares | 9 Months Ended
--- | ---
Sep. 30, 2016 | Sep. 30, 2015
Statement of Stockholders' Equity [Abstract] |  |
Dividend common stock, per share amount | $ 0.175 | $ 0.145
Dividend preferred stock, per share amount | $ 0.4875 | $ 0.475

X
- Definition Dividend common stock per share amount. + References No definition available. + Details
Name: | sbfg_DividendCommonStockPerShareAmount
Namespace Prefix: | sbfg_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Dividend preferred stock per share amount. + References No definition available. + Details
Name: | sbfg_DividendPreferredStockPerShareAmount
Namespace Prefix: | sbfg_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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