XML 17 R6.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares shares in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Statement of Stockholders' Equity [Abstract] |  |
Common stock issuance, shares | 1,666,666 |
Dividend common stock, per share amount | $ 0.075 | $ 0.065
Dividend preferred stock, per share amount | $ 0.1625 | $ 0.1625

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

X
- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration