3.7.0.1 html 288 349 1 true 52 0 false 6 false false R1.htm 0001000 - Document - Document and Entity Information Sheet http://www.fbvirginia.com/role/DocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 1001000 - Statement - Consolidated Balance Sheets Sheet http://www.fbvirginia.com/role/ConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 1001501 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://www.fbvirginia.com/role/ConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 1002000 - Statement - Consolidated Statements of Income (Unaudited) Sheet http://www.fbvirginia.com/role/ConsolidatedStatementsOfIncomeUnaudited Consolidated Statements of Income (Unaudited) Statements 4 false false R5.htm 1003000 - Statement - Consolidated Statements of Comprehensive Income (Unaudited) Sheet http://www.fbvirginia.com/role/ConsolidatedStatementsOfComprehensiveIncomeUnaudited Consolidated Statements of Comprehensive Income (Unaudited) Statements 5 false false R6.htm 1003501 - Statement - Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) Sheet http://www.fbvirginia.com/role/ConsolidatedStatementsOfComprehensiveIncomeUnauditedParenthetical Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) Statements 6 false false R7.htm 1004000 - Statement - Consolidated Statements of Cash Flows (Unaudited) Sheet http://www.fbvirginia.com/role/ConsolidatedStatementsOfCashFlowsUnaudited Consolidated Statements of Cash Flows (Unaudited) Statements 7 false false R8.htm 1005000 - Statement - Consolidated Statements of Changes in Shareholders' Equity (Unaudited) Sheet http://www.fbvirginia.com/role/ConsolidatedStatementsOfChangesInShareholdersEquityUnaudited Consolidated Statements of Changes in Shareholders' Equity (Unaudited) Statements 8 false false R9.htm 1005501 - Statement - Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) Sheet http://www.fbvirginia.com/role/ConsolidatedStatementsOfChangesInShareholdersEquityUnauditedParenthetical Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) Statements 9 false false R10.htm 2101100 - Disclosure - General Sheet http://www.fbvirginia.com/role/General General Notes 10 false false R11.htm 2102100 - Disclosure - Securities Sheet http://www.fbvirginia.com/role/Securities Securities Notes 11 false false R12.htm 2103100 - Disclosure - Loans Sheet http://www.fbvirginia.com/role/Loans Loans Notes 12 false false R13.htm 2104100 - Disclosure - Allowance for Loan Losses Sheet http://www.fbvirginia.com/role/AllowanceForLoanLosses Allowance for Loan Losses Notes 13 false false R14.htm 2105100 - Disclosure - Other Real Estate Owned (OREO) Sheet http://www.fbvirginia.com/role/OtherRealEstateOwnedOreo Other Real Estate Owned (OREO) Notes 14 false false R15.htm 2106100 - Disclosure - Other Borrowings Sheet http://www.fbvirginia.com/role/OtherBorrowings Other Borrowings Notes 15 false false R16.htm 2107100 - Disclosure - Capital Requirements Sheet http://www.fbvirginia.com/role/CapitalRequirements Capital Requirements Notes 16 false false R17.htm 2108100 - Disclosure - Subordinated Debt Sheet http://www.fbvirginia.com/role/SubordinatedDebt Subordinated Debt Notes 17 false false R18.htm 2109100 - Disclosure - Junior Subordinated Debt Sheet http://www.fbvirginia.com/role/JuniorSubordinatedDebt Junior Subordinated Debt Notes 18 false false R19.htm 2110100 - Disclosure - Benefit Plans Sheet http://www.fbvirginia.com/role/BenefitPlans Benefit Plans Notes 19 false false R20.htm 2111100 - Disclosure - Earnings per Common Share Sheet http://www.fbvirginia.com/role/EarningsPerCommonShare Earnings per Common Share Notes 20 false false R21.htm 2112100 - Disclosure - Fair Value Measurements Sheet http://www.fbvirginia.com/role/FairValueMeasurements Fair Value Measurements Notes 21 false false R22.htm 2113100 - Disclosure - Stock Compensation Plans Sheet http://www.fbvirginia.com/role/StockCompensationPlans Stock Compensation Plans Notes 22 false false R23.htm 2114100 - Disclosure - Accumulated Other Comprehensive Loss Sheet http://www.fbvirginia.com/role/AccumulatedOtherComprehensiveLoss Accumulated Other Comprehensive Loss Notes 23 false false R24.htm 2201201 - Disclosure - General (Policies) Sheet http://www.fbvirginia.com/role/GeneralPolicies General (Policies) Policies 24 false false R25.htm 2302301 - Disclosure - Securities (Tables) Sheet http://www.fbvirginia.com/role/SecuritiesTables Securities (Tables) Tables http://www.fbvirginia.com/role/Securities 25 false false R26.htm 2303301 - Disclosure - Loans (Tables) Sheet http://www.fbvirginia.com/role/LoansTables Loans (Tables) Tables http://www.fbvirginia.com/role/Loans 26 false false R27.htm 2304301 - Disclosure - Allowance for Loan Losses (Tables) Sheet http://www.fbvirginia.com/role/AllowanceForLoanLossesTables Allowance for Loan Losses (Tables) Tables http://www.fbvirginia.com/role/AllowanceForLoanLosses 27 false false R28.htm 2305301 - Disclosure - Other Real Estate Owned (OREO) (Tables) Sheet http://www.fbvirginia.com/role/OtherRealEstateOwnedOreoTables Other Real Estate Owned (OREO) (Tables) Tables http://www.fbvirginia.com/role/OtherRealEstateOwnedOreo 28 false false R29.htm 2307301 - Disclosure - Capital Requirements (Tables) Sheet http://www.fbvirginia.com/role/CapitalRequirementsTables Capital Requirements (Tables) Tables http://www.fbvirginia.com/role/CapitalRequirements 29 false false R30.htm 2310301 - Disclosure - Benefit Plans (Tables) Sheet http://www.fbvirginia.com/role/BenefitPlansTables Benefit Plans (Tables) Tables http://www.fbvirginia.com/role/BenefitPlans 30 false false R31.htm 2311301 - Disclosure - Earnings per Common Share (Tables) Sheet http://www.fbvirginia.com/role/EarningsPerCommonShareTables Earnings per Common Share (Tables) Tables http://www.fbvirginia.com/role/EarningsPerCommonShare 31 false false R32.htm 2312301 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.fbvirginia.com/role/FairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.fbvirginia.com/role/FairValueMeasurements 32 false false R33.htm 2313301 - Disclosure - Stock Compensation Plans (Tables) Sheet http://www.fbvirginia.com/role/StockCompensationPlansTables Stock Compensation Plans (Tables) Tables http://www.fbvirginia.com/role/StockCompensationPlans 33 false false R34.htm 2314301 - Disclosure - Accumulated Other Comprehensive Loss (Tables) Sheet http://www.fbvirginia.com/role/AccumulatedOtherComprehensiveLossTables Accumulated Other Comprehensive Loss (Tables) Tables http://www.fbvirginia.com/role/AccumulatedOtherComprehensiveLoss 34 false false R35.htm 2402402 - Disclosure - Securities - Summary of Amortized Costs and Fair Values of Securities (Detail) Sheet http://www.fbvirginia.com/role/SecuritiesSummaryOfAmortizedCostsAndFairValuesOfSecuritiesDetail Securities - Summary of Amortized Costs and Fair Values of Securities (Detail) Details 35 false false R36.htm 2402403 - Disclosure - Securities - Summary of Investments in an Unrealized Loss Position that were Temporarily Impaired (Detail) Sheet http://www.fbvirginia.com/role/SecuritiesSummaryOfInvestmentsInUnrealizedLossPositionThatWereTemporarilyImpairedDetail Securities - Summary of Investments in an Unrealized Loss Position that were Temporarily Impaired (Detail) Details 36 false false R37.htm 2402404 - Disclosure - Securities - Additional Information (Detail) Sheet http://www.fbvirginia.com/role/SecuritiesAdditionalInformationDetail Securities - Additional Information (Detail) Details 37 false false R38.htm 2402405 - Disclosure - Securities - Amortized Cost and Fair Value of Securities (Detail) Sheet http://www.fbvirginia.com/role/SecuritiesAmortizedCostAndFairValueOfSecuritiesDetail Securities - Amortized Cost and Fair Value of Securities (Detail) Details 38 false false R39.htm 2402406 - Disclosure - Securities - Composition of Restricted Securities (Detail) Sheet http://www.fbvirginia.com/role/SecuritiesCompositionOfRestrictedSecuritiesDetail Securities - Composition of Restricted Securities (Detail) Details 39 false false R40.htm 2403402 - Disclosure - Loans - Summary of Loans (Detail) Sheet http://www.fbvirginia.com/role/LoansSummaryOfLoansDetail Loans - Summary of Loans (Detail) Details 40 false false R41.htm 2403403 - Disclosure - Loans - Additional Information (Detail) Sheet http://www.fbvirginia.com/role/LoansAdditionalInformationDetail Loans - Additional Information (Detail) Details 41 false false R42.htm 2403404 - Disclosure - Loans - Summary of Loan Classes and an Aging of Past Due Loans (Detail) Sheet http://www.fbvirginia.com/role/LoansSummaryOfLoanClassesAndAgingOfPastDueLoansDetail Loans - Summary of Loan Classes and an Aging of Past Due Loans (Detail) Details 42 false false R43.htm 2403405 - Disclosure - Loans - Analysis of the Credit Risk Profile of Each Loan Class (Detail) Sheet http://www.fbvirginia.com/role/LoansAnalysisOfCreditRiskProfileOfEachLoanClassDetail Loans - Analysis of the Credit Risk Profile of Each Loan Class (Detail) Details 43 false false R44.htm 2404402 - Disclosure - Allowance for Loan Losses - Allowance by Impairment Methodology and Loans by Impairment Methodology (Detail) Sheet http://www.fbvirginia.com/role/AllowanceForLoanLossesAllowanceByImpairmentMethodologyAndLoansByImpairmentMethodologyDetail Allowance for Loan Losses - Allowance by Impairment Methodology and Loans by Impairment Methodology (Detail) Details 44 false false R45.htm 2404403 - Disclosure - Allowance for Loan losses - Impaired Loans and Related Allowance (Detail) Sheet http://www.fbvirginia.com/role/AllowanceForLoanLossesImpairedLoansAndRelatedAllowanceDetail Allowance for Loan losses - Impaired Loans and Related Allowance (Detail) Details 45 false false R46.htm 2404404 - Disclosure - Allowance for Loan Losses - Additional Information (Detail) Sheet http://www.fbvirginia.com/role/AllowanceForLoanLossesAdditionalInformationDetail Allowance for Loan Losses - Additional Information (Detail) Details 46 false false R47.htm 2405402 - Disclosure - Other Real Estate Owned (OREO) - Summary of Changes in the Balance for OREO (Detail) Sheet http://www.fbvirginia.com/role/OtherRealEstateOwnedOreoSummaryOfChangesInBalanceForOreoDetail Other Real Estate Owned (OREO) - Summary of Changes in the Balance for OREO (Detail) Details http://www.fbvirginia.com/role/OtherRealEstateOwnedOreoTables 47 false false R48.htm 2405403 - Disclosure - Other Real Estate Owned (OREO) - Additional Information (Detail) Sheet http://www.fbvirginia.com/role/OtherRealEstateOwnedOreoAdditionalInformationDetail Other Real Estate Owned (OREO) - Additional Information (Detail) Details http://www.fbvirginia.com/role/OtherRealEstateOwnedOreoTables 48 false false R49.htm 2405404 - Disclosure - Other Real Estate Owned (OREO) - Summary of Changes in the Valuation Allowance (Detail) Sheet http://www.fbvirginia.com/role/OtherRealEstateOwnedOreoSummaryOfChangesInValuationAllowanceDetail Other Real Estate Owned (OREO) - Summary of Changes in the Valuation Allowance (Detail) Details http://www.fbvirginia.com/role/OtherRealEstateOwnedOreoTables 49 false false R50.htm 2406401 - Disclosure - Other Borrowings - Additional Information (Detail) Sheet http://www.fbvirginia.com/role/OtherBorrowingsAdditionalInformationDetail Other Borrowings - Additional Information (Detail) Details 50 false false R51.htm 2407402 - Disclosure - Capital Requirements - Additional Information (Detail) Sheet http://www.fbvirginia.com/role/CapitalRequirementsAdditionalInformationDetail Capital Requirements - Additional Information (Detail) Details 51 false false R52.htm 2407403 - Disclosure - Capital Requirements - Comparison of Capital of Company and Bank with Minimum Regulatory Guidelines (Detail) Sheet http://www.fbvirginia.com/role/CapitalRequirementsComparisonOfCapitalOfCompanyAndBankWithMinimumRegulatoryGuidelinesDetail Capital Requirements - Comparison of Capital of Company and Bank with Minimum Regulatory Guidelines (Detail) Details 52 false false R53.htm 2408401 - Disclosure - Subordinated Debt - Additional Information (Detail) Sheet http://www.fbvirginia.com/role/SubordinatedDebtAdditionalInformationDetail Subordinated Debt - Additional Information (Detail) Details 53 false false R54.htm 2409401 - Disclosure - Junior Subordinated Debt - Additional Information (Detail) Sheet http://www.fbvirginia.com/role/JuniorSubordinatedDebtAdditionalInformationDetail Junior Subordinated Debt - Additional Information (Detail) Details 54 false false R55.htm 2410402 - Disclosure - Benefit Plans - Additional Information (Detail) Sheet http://www.fbvirginia.com/role/BenefitPlansAdditionalInformationDetail Benefit Plans - Additional Information (Detail) Details 55 false false R56.htm 2410403 - Disclosure - Benefit Plans - Components of Net Periodic Benefit Cost (Detail) Sheet http://www.fbvirginia.com/role/BenefitPlansComponentsOfNetPeriodicBenefitCostDetail Benefit Plans - Components of Net Periodic Benefit Cost (Detail) Details 56 false false R57.htm 2411402 - Disclosure - Earnings per Common Share - Computation of Basic and Diluted Earnings per Share (Detail) Sheet http://www.fbvirginia.com/role/EarningsPerCommonShareComputationOfBasicAndDilutedEarningsPerShareDetail Earnings per Common Share - Computation of Basic and Diluted Earnings per Share (Detail) Details 57 false false R58.htm 2412402 - Disclosure - Fair Value Measurements - Balances of Assets Measured at Fair Value on a Recurring Basis (Detail) Sheet http://www.fbvirginia.com/role/FairValueMeasurementsBalancesOfAssetsMeasuredAtFairValueOnRecurringBasisDetail Fair Value Measurements - Balances of Assets Measured at Fair Value on a Recurring Basis (Detail) Details 58 false false R59.htm 2412403 - Disclosure - Fair Value Measurements - Additional Information (Detail) Sheet http://www.fbvirginia.com/role/FairValueMeasurementsAdditionalInformationDetail Fair Value Measurements - Additional Information (Detail) Details 59 false false R60.htm 2412404 - Disclosure - Fair Value Measurements - Summary of Assets Measured at Fair Value on a Nonrecurring Basis (Detail) Sheet http://www.fbvirginia.com/role/FairValueMeasurementsSummaryOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail Fair Value Measurements - Summary of Assets Measured at Fair Value on a Nonrecurring Basis (Detail) Details 60 false false R61.htm 2412405 - Disclosure - Fair Value Measurements - Quantitative Information about Level 3 Fair Value Measurements (Detail) Sheet http://www.fbvirginia.com/role/FairValueMeasurementsQuantitativeInformationAboutLevel3FairValueMeasurementsDetail Fair Value Measurements - Quantitative Information about Level 3 Fair Value Measurements (Detail) Details 61 false false R62.htm 2412406 - Disclosure - Fair Value Measurements - Carrying Values and Estimated Fair Values of Company's Financial Instruments (Detail) Sheet http://www.fbvirginia.com/role/FairValueMeasurementsCarryingValuesAndEstimatedFairValuesOfCompanysFinancialInstrumentsDetail Fair Value Measurements - Carrying Values and Estimated Fair Values of Company's Financial Instruments (Detail) Details 62 false false R63.htm 2413402 - Disclosure - Stock Compensation Plans - Additional Information (Detail) Sheet http://www.fbvirginia.com/role/StockCompensationPlansAdditionalInformationDetail Stock Compensation Plans - Additional Information (Detail) Details 63 false false R64.htm 2413403 - Disclosure - Stock Compensation Plans - Summary of Restricted Stock Units (Detail) Sheet http://www.fbvirginia.com/role/StockCompensationPlansSummaryOfRestrictedStockUnitsDetail Stock Compensation Plans - Summary of Restricted Stock Units (Detail) Details 64 false false R65.htm 2414402 - Disclosure - Accumulated Other Comprehensive Loss - Schedule of Changes in Component of Accumulated Other Comprehensive Loss (Detail) Sheet http://www.fbvirginia.com/role/AccumulatedOtherComprehensiveLossScheduleOfChangesInComponentOfAccumulatedOtherComprehensiveLossDetail Accumulated Other Comprehensive Loss - Schedule of Changes in Component of Accumulated Other Comprehensive Loss (Detail) Details 65 false false R66.htm 2414403 - Disclosure - Accumulated Other Comprehensive Loss - Reclassifications from Accumulated Other Comprehensive Loss (Detail) Sheet http://www.fbvirginia.com/role/AccumulatedOtherComprehensiveLossReclassificationsFromAccumulatedOtherComprehensiveLossDetail Accumulated Other Comprehensive Loss - Reclassifications from Accumulated Other Comprehensive Loss (Detail) Details 66 false false All Reports Book All Reports fxnc-20170630.xml fxnc-20170630.xsd fxnc-20170630_cal.xml fxnc-20170630_def.xml fxnc-20170630_lab.xml fxnc-20170630_pre.xml true true