3.10.0.1 html 337 257 1 true 49 0 false 8 false false R1.htm 001 - Document - Document and Entity Information Sheet http://www.fairportsavingsbank.com/role/DocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 002 - Statement - Consolidated Balance Sheets Sheet http://www.fairportsavingsbank.com/role/ConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 003 - Statement - Consolidated Balance Sheets (Parenthenticals) Sheet http://www.fairportsavingsbank.com/role/ConsolidatedBalanceSheetsParenthenticals Consolidated Balance Sheets (Parenthenticals) Statements 3 false false R4.htm 004 - Statement - Consolidated Statements of Income (Unaudited) Sheet http://www.fairportsavingsbank.com/role/ConsolidatedStatementsOfIncomeUnaudited Consolidated Statements of Income (Unaudited) Statements 4 false false R5.htm 005 - Statement - Consolidated Statements of Comprehensive Income (Unaudited) Sheet http://www.fairportsavingsbank.com/role/ConsolidatedStatementsOfComprehensiveIncomeUnaudited Consolidated Statements of Comprehensive Income (Unaudited) Statements 5 false false R6.htm 006 - Statement - Consolidated Statements of Stockholders' Equity (Unaudited) Sheet http://www.fairportsavingsbank.com/role/ConsolidatedStatementsOfStockholdersEquityUnaudited Consolidated Statements of Stockholders' Equity (Unaudited) Statements 6 false false R7.htm 007 - Statement - Consolidated Statements of Cash Flows (Unaudited) Sheet http://www.fairportsavingsbank.com/role/ConsolidatedStatementsOfCashFlowsUnaudited Consolidated Statements of Cash Flows (Unaudited) Statements 7 false false R8.htm 008 - Disclosure - Basis of Presentation Sheet http://www.fairportsavingsbank.com/role/BasisOfPresentation Basis of Presentation Notes 8 false false R9.htm 009 - Disclosure - New Accounting Pronouncements Sheet http://www.fairportsavingsbank.com/role/NewAccountingPronouncements New Accounting Pronouncements Notes 9 false false R10.htm 010 - Disclosure - Earnings per Common Share Sheet http://www.fairportsavingsbank.com/role/EarningsPerCommonShare Earnings per Common Share Notes 10 false false R11.htm 011 - Disclosure - Investment Securities Sheet http://www.fairportsavingsbank.com/role/InvestmentSecurities Investment Securities Notes 11 false false R12.htm 012 - Disclosure - Loans Sheet http://www.fairportsavingsbank.com/role/Loans Loans Notes 12 false false R13.htm 013 - Disclosure - Allowance for Loan Losses and Foreclosed Real Estate Sheet http://www.fairportsavingsbank.com/role/AllowanceForLoanLossesAndForeclosedRealEstate Allowance for Loan Losses and Foreclosed Real Estate Notes 13 false false R14.htm 014 - Disclosure - Fair Value Measurements Sheet http://www.fairportsavingsbank.com/role/FairValueMeasurements Fair Value Measurements Notes 14 false false R15.htm 015 - Disclosure - Accumulated Other Comprehensive Income (Loss) Sheet http://www.fairportsavingsbank.com/role/AccumulatedOtherComprehensiveIncomeLoss Accumulated Other Comprehensive Income (Loss) Notes 15 false false R16.htm 016 - Disclosure - Non-Interest Income Sheet http://www.fairportsavingsbank.com/role/NonInterestIncome Non-Interest Income Notes 16 false false R17.htm 017 - Disclosure - Stock-Based Compensation Sheet http://www.fairportsavingsbank.com/role/StockBasedCompensation Stock-Based Compensation Notes 17 false false R18.htm 018 - Disclosure - Accounting Policy (Policies) Sheet http://www.fairportsavingsbank.com/role/AccountingPolicyPolicies Accounting Policy (Policies) Policies http://www.fairportsavingsbank.com/role/NewAccountingPronouncements 18 false false R19.htm 019 - Disclosure - Earnings per Common Share (Tables) Sheet http://www.fairportsavingsbank.com/role/EarningsperCommonShareTables Earnings per Common Share (Tables) Tables http://www.fairportsavingsbank.com/role/EarningsPerCommonShare 19 false false R20.htm 020 - Disclosure - Investment Securities (Tables) Sheet http://www.fairportsavingsbank.com/role/Investmentsecuritiestables Investment Securities (Tables) Tables http://www.fairportsavingsbank.com/role/InvestmentSecurities 20 false false R21.htm 021 - Disclosure - Loans (Tables) Sheet http://www.fairportsavingsbank.com/role/LoansTables Loans (Tables) Tables http://www.fairportsavingsbank.com/role/Loans 21 false false R22.htm 022 - Disclosure - Allowance for Loan Losses and Foreclosed Real Estate (Tables) Sheet http://www.fairportsavingsbank.com/role/AllowanceforLoanLossesandForeclosedRealEstateTables Allowance for Loan Losses and Foreclosed Real Estate (Tables) Tables http://www.fairportsavingsbank.com/role/AllowanceForLoanLossesAndForeclosedRealEstate 22 false false R23.htm 023 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.fairportsavingsbank.com/role/FairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.fairportsavingsbank.com/role/FairValueMeasurements 23 false false R24.htm 024 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables) Sheet http://www.fairportsavingsbank.com/role/AccumulatedOtherComprehensiveIncomeLossTables Accumulated Other Comprehensive Income (Loss) (Tables) Tables http://www.fairportsavingsbank.com/role/AccumulatedOtherComprehensiveIncomeLoss 24 false false R25.htm 025 - Disclosure - Non-Interest Income (Tables) Sheet http://www.fairportsavingsbank.com/role/NonInterestIncomeTables Non-Interest Income (Tables) Tables http://www.fairportsavingsbank.com/role/NonInterestIncome 25 false false R26.htm 026 - Disclosure - Stock-Based Compensation (Tables) Sheet http://www.fairportsavingsbank.com/role/StockBasedCompensationTables Stock-Based Compensation (Tables) Tables http://www.fairportsavingsbank.com/role/StockBasedCompensation 26 false false R27.htm 027 - Disclosure - Earnings per Common Share (Details) Sheet http://www.fairportsavingsbank.com/role/EarningsPerCommonShareDetails Earnings per Common Share (Details) Details http://www.fairportsavingsbank.com/role/EarningsperCommonShareTables 27 false false R28.htm 028 - Disclosure - Earnings per Common Share (Detail Textuals) Sheet http://www.fairportsavingsbank.com/role/EarningsPerCommonShareDetailTextuals Earnings per Common Share (Detail Textuals) Details http://www.fairportsavingsbank.com/role/EarningsperCommonShareTables 28 false false R29.htm 029 - Disclosure - Investment Securities (Details) Sheet http://www.fairportsavingsbank.com/role/InvestmentSecuritiesDetails Investment Securities (Details) Details http://www.fairportsavingsbank.com/role/Investmentsecuritiestables 29 false false R30.htm 030 - Disclosure - Investment Securities (Details 1) Sheet http://www.fairportsavingsbank.com/role/InvestmentSecuritiesDetails1 Investment Securities (Details 1) Details http://www.fairportsavingsbank.com/role/Investmentsecuritiestables 30 false false R31.htm 031 - Disclosure - Investment Securities (Details 2) Sheet http://www.fairportsavingsbank.com/role/InvestmentSecuritiesDetails2 Investment Securities (Details 2) Details http://www.fairportsavingsbank.com/role/Investmentsecuritiestables 31 false false R32.htm 032 - Disclosure - Investment Securities (Details 3) Sheet http://www.fairportsavingsbank.com/role/InvestmentSecuritiesDetails3 Investment Securities (Details 3) Details http://www.fairportsavingsbank.com/role/Investmentsecuritiestables 32 false false R33.htm 033 - Disclosure - Investment Securities (Details 4) Sheet http://www.fairportsavingsbank.com/role/InvestmentSecuritiesDetails4 Investment Securities (Details 4) Details http://www.fairportsavingsbank.com/role/Investmentsecuritiestables 33 false false R34.htm 034 - Disclosure - Investment Securities (Details 5) Sheet http://www.fairportsavingsbank.com/role/InvestmentSecuritiesDetails5 Investment Securities (Details 5) Details http://www.fairportsavingsbank.com/role/Investmentsecuritiestables 34 false false R35.htm 035 - Disclosure - Investment Securities (Detail Textuals) Sheet http://www.fairportsavingsbank.com/role/InvestmentSecuritiesDetailTextuals Investment Securities (Detail Textuals) Details http://www.fairportsavingsbank.com/role/Investmentsecuritiestables 35 false false R36.htm 036 - Disclosure - Loans - Major classifications of loans (Details) Sheet http://www.fairportsavingsbank.com/role/Loansmajorclassificationsofloansdetails Loans - Major classifications of loans (Details) Details 36 false false R37.htm 037 - Disclosure - Loans - Risk category of loans by class (Details 1) Sheet http://www.fairportsavingsbank.com/role/LoansRiskCategoryOfLoansByClassDetails1 Loans - Risk category of loans by class (Details 1) Details 37 false false R38.htm 038 - Disclosure - Loans - Analysis of the age of the loan delinquencies by type and by amount past due (Details 2) Sheet http://www.fairportsavingsbank.com/role/LoansAnalysisOfAgeOfLoanDelinquenciesByTypeAndByAmountPastDueDetails2 Loans - Analysis of the age of the loan delinquencies by type and by amount past due (Details 2) Details 38 false false R39.htm 039 - Disclosure - Loans (Detail Textuals) Sheet http://www.fairportsavingsbank.com/role/LoansDetailTextuals Loans (Detail Textuals) Details http://www.fairportsavingsbank.com/role/LoansTables 39 false false R40.htm 040 - Disclosure - Allowance for Loan Losses and Foreclosed Real Estate - Allowance for loan losses allocated by loan class and the activity (Details) Sheet http://www.fairportsavingsbank.com/role/AllowanceForLoanLossesAndForeclosedRealEstateAllowanceForLoanLossesAllocatedByLoanClassAndActivityDetails Allowance for Loan Losses and Foreclosed Real Estate - Allowance for loan losses allocated by loan class and the activity (Details) Details 40 false false R41.htm 041 - Disclosure - Allowance for Loan Losses and Foreclosed Real Estate (Detail Textuals) Sheet http://www.fairportsavingsbank.com/role/AllowanceForLoanLossesAndForeclosedRealEstateDetailTextuals Allowance for Loan Losses and Foreclosed Real Estate (Detail Textuals) Details http://www.fairportsavingsbank.com/role/AllowanceforLoanLossesandForeclosedRealEstateTables 41 false false R42.htm 042 - Disclosure - Fair Value Measurements - Fair value on a recurring basis, the fair value measurements by level within the fair value hierarchy (Details) Sheet http://www.fairportsavingsbank.com/role/FairValueMeasurementsFairValueOnARecurringBasisTheFairValueMeasurementsByLevelWithinTheFairValueHierarchyDetails Fair Value Measurements - Fair value on a recurring basis, the fair value measurements by level within the fair value hierarchy (Details) Details 42 false false R43.htm 043 - Disclosure - Fair Value Measurements - Carrying amounts and estimated fair values of the financial instruments (Details 1) Sheet http://www.fairportsavingsbank.com/role/FairValueMeasurementsCarryingAmountsAndEstimatedFairValuesOfTheFinancialInstrumentsDetails1 Fair Value Measurements - Carrying amounts and estimated fair values of the financial instruments (Details 1) Details 43 false false R44.htm 044 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Details) Sheet http://www.fairportsavingsbank.com/role/AccumulatedOtherComprehensiveIncomeLossDetails Accumulated Other Comprehensive Income (Loss) (Details) Details http://www.fairportsavingsbank.com/role/AccumulatedOtherComprehensiveIncomeLossTables 44 false false R45.htm 045 - Disclosure - Non-Interest Income (Details) Sheet http://www.fairportsavingsbank.com/role/NonInterestIncomeDetails Non-Interest Income (Details) Details http://www.fairportsavingsbank.com/role/NonInterestIncomeTables 45 false false R46.htm 046 - Disclosure - Stock-Based Compensation (Details) Sheet http://www.fairportsavingsbank.com/role/StockBasedCompensationDetails Stock-Based Compensation (Details) Details http://www.fairportsavingsbank.com/role/StockBasedCompensationTables 46 false false R47.htm 047 - Disclosure - Stock-Based Compensation (Detail Textuals) Sheet http://www.fairportsavingsbank.com/role/StockBasedCompensationDetailTextuals Stock-Based Compensation (Detail Textuals) Details http://www.fairportsavingsbank.com/role/StockBasedCompensationTables 47 false false All Reports Book All Reports fsbc-20180630.xml fsbc-20180630.xsd fsbc-20180630_cal.xml fsbc-20180630_def.xml fsbc-20180630_lab.xml fsbc-20180630_pre.xml http://fasb.org/srt/2018-01-31 http://xbrl.sec.gov/dei/2018-01-31 http://fasb.org/us-gaap/2018-01-31 true true