XML 16 R39.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Mortgage Servicing Rights (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2014
Mortgage Servicing Rights [Abstract] |
Summary of mortgage servicing rights capitalized and related amortization |
| ($ in thousands) |  | 2014 |  |  | 2013 |
| Carrying amount, beginning of year |  | $ | 5,180 |  |  | $ | 3,775 |
| Mortgage servicing rights capitalized during the year |  |  | 1,367 |  |  |  | 1,603 |
| Mortgage servicing rights amortization during the year |  |  | (612 | ) |  |  | (827 | )
| Net change in valuation allowance |  |  | (231 | ) |  |  | 629 |
| Carrying amount, end of year |  | $ | 5,704 |  |  | $ | 5,180 |
| Valuation allowance: |  |  |  |  |  |  |  |
| Beginning of year |  | $ | 181 |  |  | $ | 810 |
| Reduction |  |  | 231 |  |  |  | (629 | )
| End of year |  | $ | 412 |  |  | $ | 181 |
| Fair Value, beginning of period |  | $ | 6,237 |  |  | $ | 4,329 |
| Fair Value, end of period |  | $ | 6,358 |  |  | $ | 6,237 |

X
- Details
Name: | rbnf_MortgageServicingRightsAbstract
Namespace Prefix: | rbnf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of activity in the balance of servicing assets subsequently measured at amortized cost. Includes, but is not limited to, beginning and ending balances, additions, disposals, and amortization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746 + Details
Name: | us-gaap_ScheduleOfServicingAssetsAtAmortizedValueTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration