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Loans and Allowance for Loan Losses (Details 3) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | $ 516,492 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount | $ 477,577 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Loan Grade 1-2 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 1,275 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeOneToTwoPassMember | 1,863 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeOneToTwoPassMember
Loan Grade 3 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 253,808 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeThreePassMember | 206,822 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeThreePassMember
Loan Grade 4 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 243,845 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeFourPassMember | 245,122 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeFourPassMember
Loan Grade One To Four Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 498,928 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeOneToFourPassMember | 453,807 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeOneToFourPassMember
Special Mention [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 7,551 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SpecialMentionMember | 13,535 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SpecialMentionMember
Substandard [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 5,541 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SubstandardMember | 5,221 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SubstandardMember
Doubtful [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 4,472 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_DoubtfulMember | 5,014 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_DoubtfulMember
Loss [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross |  |
Commercial & Industrial [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 88,485 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember | 85,642 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial & Industrial [Member] | Loan Grade 1-2 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 1,148 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeOneToTwoPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember | 1,619 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeOneToTwoPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial & Industrial [Member] | Loan Grade 3 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 23,580 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeThreePassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember | 22,328 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeThreePassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial & Industrial [Member] | Loan Grade 4 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 61,691 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeFourPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember | 56,188 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeFourPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial & Industrial [Member] | Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 86,419 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_PassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember | 80,135 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_PassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial & Industrial [Member] | Special Mention [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 83 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SpecialMentionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember | 3,159 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SpecialMentionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial & Industrial [Member] | Substandard [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 752 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SubstandardMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember | 32 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SubstandardMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial & Industrial [Member] | Doubtful [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 1,231 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_DoubtfulMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember | 2,316 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_DoubtfulMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial & Industrial [Member] | Loss [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross |  |
Commercial RE & Construction [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 217,030 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember | 205,301 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember
Commercial RE & Construction [Member] | Loan Grade 1-2 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 66 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeOneToTwoPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember | 81 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeOneToTwoPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember
Commercial RE & Construction [Member] | Loan Grade 3 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 67,779 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeThreePassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember | 44,095 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeThreePassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember
Commercial RE & Construction [Member] | Loan Grade 4 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 136,427 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeFourPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember | 146,861 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeFourPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember
Commercial RE & Construction [Member] | Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 204,272 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_PassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember | 191,037 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_PassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember
Commercial RE & Construction [Member] | Special Mention [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 6,224 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SpecialMentionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember | 8,917 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SpecialMentionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember
Commercial RE & Construction [Member] | Substandard [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 4,422 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SubstandardMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember | 4,815 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SubstandardMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember
Commercial RE & Construction [Member] | Doubtful [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 2,112 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_DoubtfulMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember | 532 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_DoubtfulMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_CommercialReConstructionPortfolioSegmentMember
Commercial RE & Construction [Member] | Loss [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross |  |
Agricultural & Farmland [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 46,217 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_AgriculturalFarmlandPortfolioSegmentMember | 39,210 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_AgriculturalFarmlandPortfolioSegmentMember
Agricultural & Farmland [Member] | Loan Grade 1-2 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 61 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeOneToTwoPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_AgriculturalFarmlandPortfolioSegmentMember | 76 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeOneToTwoPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_AgriculturalFarmlandPortfolioSegmentMember
Agricultural & Farmland [Member] | Loan Grade 3 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 9,505 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeThreePassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_AgriculturalFarmlandPortfolioSegmentMember | 6,543 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeThreePassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_AgriculturalFarmlandPortfolioSegmentMember
Agricultural & Farmland [Member] | Loan Grade 4 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 36,651 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeFourPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_AgriculturalFarmlandPortfolioSegmentMember | 32,591 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeFourPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_AgriculturalFarmlandPortfolioSegmentMember
Agricultural & Farmland [Member] | Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 46,217 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_PassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_AgriculturalFarmlandPortfolioSegmentMember | 39,210 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_PassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_AgriculturalFarmlandPortfolioSegmentMember
Agricultural & Farmland [Member] | Special Mention [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross |  |
Agricultural & Farmland [Member] | Substandard [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross |  |
Agricultural & Farmland [Member] | Doubtful [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross |  |
Agricultural & Farmland [Member] | Loss [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross |  |
Residential Real Estate [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 113,214 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialRealEstateMember | 99,620 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialRealEstateMember
Residential Real Estate [Member] | Loan Grade 1-2 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross |  |
Residential Real Estate [Member] | Loan Grade 3 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 105,149 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeThreePassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialRealEstateMember | 90,606 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeThreePassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialRealEstateMember
Residential Real Estate [Member] | Loan Grade 4 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 5,611 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeFourPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialRealEstateMember | 5,700 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeFourPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialRealEstateMember
Residential Real Estate [Member] | Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 110,760 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_PassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialRealEstateMember | 96,306 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_PassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialRealEstateMember
Residential Real Estate [Member] | Special Mention [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 1,160 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SpecialMentionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialRealEstateMember | 1,373 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SpecialMentionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialRealEstateMember
Residential Real Estate [Member] | Substandard [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 312 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SubstandardMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialRealEstateMember | 290 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SubstandardMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialRealEstateMember
Residential Real Estate [Member] | Doubtful [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 982 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_DoubtfulMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialRealEstateMember | 1,651 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_DoubtfulMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialRealEstateMember
Residential Real Estate [Member] | Loss [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross |  |
Consumer & Other [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 51,546 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember | 47,804 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember
Consumer & Other [Member] | Loan Grade 1-2 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross |  | 87 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeOneToTwoPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember
Consumer & Other [Member] | Loan Grade 3 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 47,795 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeThreePassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember | 43,250 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeThreePassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember
Consumer & Other [Member] | Loan Grade 4 Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 3,465 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeFourPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember | 3,782 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = rbnf_LoanGradeFourPassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember
Consumer & Other [Member] | Pass [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 51,260 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_PassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember | 47,119 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_PassMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember
Consumer & Other [Member] | Special Mention [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 84 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SpecialMentionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember | 86 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SpecialMentionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember
Consumer & Other [Member] | Substandard [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 55 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SubstandardMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember | 84 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_SubstandardMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember
Consumer & Other [Member] | Doubtful [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross | 147 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_DoubtfulMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember | 515 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_CreditRatingAMBestAxis = us-gaap_DoubtfulMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rbnf_OtherPortfolioSegmentMember
Consumer & Other [Member] | Loss [Member] |  |
Summary of credit risk profile of the Company's loan portfolio based on rating category |  |
Loans and Leases Receivable, Gross |  |

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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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