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v2.4.1.9

Fair Value of Assets and Liabilities (Details 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014
Collateral-dependent impaired loans [Member] | Comparability adjustments (%) [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | $ 1,551us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = rbnf_CollateralDependentImpairedLoansMember / rbnf_UnobservableInputsAxis = rbnf_ComparabilityAdjustmentsPercentMember | $ 2,538us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = rbnf_CollateralDependentImpairedLoansMember / rbnf_UnobservableInputsAxis = rbnf_ComparabilityAdjustmentsPercentMember
Fair Value Measurements, Valuation Technique | Market comparable properties | Market comparable properties
Fair Value Measurements, Unobservable Inputs | Comparability adjustments (%) | Comparability adjustments (%)
Mortgage servicing rights [Member] | Discount Rate [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | $ 2,841us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = rbnf_MortgageServicingRightsMember / rbnf_UnobservableInputsAxis = rbnf_DiscountRateMember | $ 3,037us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = rbnf_MortgageServicingRightsMember / rbnf_UnobservableInputsAxis = rbnf_DiscountRateMember
Fair Value Measurements, Valuation Technique | Discounted cash flow | Discounted cash flow
Fair Value Measurements, Unobservable Inputs | Discount Rate | Discount Rate
Fair Value Measurements, Range (Weighted Average) | 9.50%rbnf_FairValueInputInterestRate / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = rbnf_MortgageServicingRightsMember / rbnf_UnobservableInputsAxis = rbnf_DiscountRateMember | 9.50%rbnf_FairValueInputInterestRate / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = rbnf_MortgageServicingRightsMember / rbnf_UnobservableInputsAxis = rbnf_DiscountRateMember
Mortgage servicing rights [Member] | Constant prepayment rate [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Unobservable Inputs | Constant prepayment rate | Constant prepayment rate
Fair Value Measurements, Range (Weighted Average) | 10.70%rbnf_FairValueInputInterestRate / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = rbnf_MortgageServicingRightsMember / rbnf_UnobservableInputsAxis = rbnf_ConstantPrepaymentRateMember | 10.70%rbnf_FairValueInputInterestRate / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = rbnf_MortgageServicingRightsMember / rbnf_UnobservableInputsAxis = rbnf_ConstantPrepaymentRateMember
Mortgage servicing rights [Member] | P&I earnings credit [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Unobservable Inputs | P&I earnings credit | P&I earnings credit
Fair Value Measurements, Range (Weighted Average) | 0.17%rbnf_FairValueInputInterestRate / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = rbnf_MortgageServicingRightsMember / rbnf_UnobservableInputsAxis = rbnf_PAndIEarningsCreditMember | 0.17%rbnf_FairValueInputInterestRate / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = rbnf_MortgageServicingRightsMember / rbnf_UnobservableInputsAxis = rbnf_PAndIEarningsCreditMember
Mortgage servicing rights [Member] | T&I earnings credit [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Unobservable Inputs | T&I earnings credit | T&I earnings credit
Fair Value Measurements, Range (Weighted Average) | 1.63%rbnf_FairValueInputInterestRate / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = rbnf_MortgageServicingRightsMember / rbnf_UnobservableInputsAxis = rbnf_TAndIEarningsCreditMember | 1.75%rbnf_FairValueInputInterestRate / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = rbnf_MortgageServicingRightsMember / rbnf_UnobservableInputsAxis = rbnf_TAndIEarningsCreditMember
Mortgage servicing rights [Member] | Inflation for cost of servicing [Member] |  |
Quantitative information about unobservable inputs used in recurring and nonrecurring fair value measurements |  |
Fair Value Measurements, Unobservable Inputs | Inflation for cost of servicing | Inflation for cost of servicing
Fair Value Measurements, Range (Weighted Average) | 1.50%rbnf_FairValueInputInterestRate / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = rbnf_MortgageServicingRightsMember / rbnf_UnobservableInputsAxis = rbnf_InflationForCostOfServicingMember | 1.50%rbnf_FairValueInputInterestRate / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = rbnf_MortgageServicingRightsMember / rbnf_UnobservableInputsAxis = rbnf_InflationForCostOfServicingMember

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- Definition Description of the inputs and valuation technique(s) used to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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