3.19.1 html 329 536 1 false 91 0 false 14 false false R1.htm 00090 - Document - Document and Entity Information Sheet http://www.fvcbank.com/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 00100 - Statement - Consolidated Statements of Condition Sheet http://www.fvcbank.com/role/StatementConsolidatedStatementsOfCondition Consolidated Statements of Condition Statements 2 false false R3.htm 00105 - Statement - Consolidated Statements of Condition (Parenthetical) Sheet http://www.fvcbank.com/role/StatementConsolidatedStatementsOfConditionParenthetical Consolidated Statements of Condition (Parenthetical) Statements 3 false false R4.htm 00200 - Statement - Consolidated Statements of Income Sheet http://www.fvcbank.com/role/StatementConsolidatedStatementsOfIncome Consolidated Statements of Income Statements 4 false false R5.htm 00300 - Statement - Consolidated Statements of Comprehensive Income Sheet http://www.fvcbank.com/role/StatementConsolidatedStatementsOfComprehensiveIncome Consolidated Statements of Comprehensive Income Statements 5 false false R6.htm 00305 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical) Sheet http://www.fvcbank.com/role/StatementConsolidatedStatementsOfComprehensiveIncomeParenthetical Consolidated Statements of Comprehensive Income (Parenthetical) Statements 6 false false R7.htm 00400 - Statement - Consolidated Statements of Cash Flows Sheet http://www.fvcbank.com/role/StatementConsolidatedStatementsOfCashFlows Consolidated Statements of Cash Flows Statements 7 false false R8.htm 00500 - Statement - Consolidated Statements of Changes in Stockholders' Equity Sheet http://www.fvcbank.com/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity Consolidated Statements of Changes in Stockholders' Equity Statements 8 false false R9.htm 00505 - Statement - Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) Sheet http://www.fvcbank.com/role/StatementConsolidatedStatementsOfChangesInStockholdersEquityParenthetical Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) Statements 9 false false R10.htm 10101 - Disclosure - Organization and Summary of Significant Accounting Policies Sheet http://www.fvcbank.com/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPolicies Organization and Summary of Significant Accounting Policies Notes 10 false false R11.htm 10201 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.fvcbank.com/role/DisclosureSummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 11 false false R12.htm 10301 - Disclosure - Business Combinations Sheet http://www.fvcbank.com/role/DisclosureBusinessCombinations Business Combinations Notes 12 false false R13.htm 10401 - Disclosure - Investment Securities and Other Investments Sheet http://www.fvcbank.com/role/DisclosureInvestmentSecuritiesAndOtherInvestments Investment Securities and Other Investments Notes 13 false false R14.htm 10501 - Disclosure - Loans and Allowance for Loan Losses Sheet http://www.fvcbank.com/role/DisclosureLoansAndAllowanceForLoanLosses Loans and Allowance for Loan Losses Notes 14 false false R15.htm 10601 - Disclosure - Other Real Estate Owned Sheet http://www.fvcbank.com/role/DisclosureOtherRealEstateOwned Other Real Estate Owned Notes 15 false false R16.htm 10701 - Disclosure - Goodwill and Intangibles Sheet http://www.fvcbank.com/role/DisclosureGoodwillAndIntangibles Goodwill and Intangibles Notes 16 false false R17.htm 10801 - Disclosure - Premises and Equipment Sheet http://www.fvcbank.com/role/DisclosurePremisesAndEquipment Premises and Equipment Notes 17 false false R18.htm 10901 - Disclosure - Deposits Sheet http://www.fvcbank.com/role/DisclosureDeposits Deposits Notes 18 false false R19.htm 11001 - Disclosure - Other Borrowed Funds Sheet http://www.fvcbank.com/role/DisclosureOtherBorrowedFunds Other Borrowed Funds Notes 19 false false R20.htm 11101 - Disclosure - Income Taxes Sheet http://www.fvcbank.com/role/DisclosureIncomeTaxes Income Taxes Notes 20 false false R21.htm 11201 - Disclosure - Derivative Financial Instruments Sheet http://www.fvcbank.com/role/DisclosureDerivativeFinancialInstruments Derivative Financial Instruments Notes 21 false false R22.htm 11301 - Disclosure - Financial Instruments with Off-Balance Sheet Risk Sheet http://www.fvcbank.com/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRisk Financial Instruments with Off-Balance Sheet Risk Notes 22 false false R23.htm 11401 - Disclosure - Minimum Regulatory Capital Requirements Sheet http://www.fvcbank.com/role/DisclosureMinimumRegulatoryCapitalRequirements Minimum Regulatory Capital Requirements Notes 23 false false R24.htm 11501 - Disclosure - Related Party Transactions Sheet http://www.fvcbank.com/role/DisclosureRelatedPartyTransactions Related Party Transactions Notes 24 false false R25.htm 11601 - Disclosure - Stock-Based Compensation Plan Sheet http://www.fvcbank.com/role/DisclosureStockBasedCompensationPlan Stock-Based Compensation Plan Notes 25 false false R26.htm 11701 - Disclosure - Fair Value Measurements Sheet http://www.fvcbank.com/role/DisclosureFairValueMeasurements Fair Value Measurements Notes 26 false false R27.htm 11801 - Disclosure - Earnings Per Share Sheet http://www.fvcbank.com/role/DisclosureEarningsPerShare Earnings Per Share Notes 27 false false R28.htm 11901 - Disclosure - Supplemental Cash Flow Information Sheet http://www.fvcbank.com/role/DisclosureSupplementalCashFlowInformation Supplemental Cash Flow Information Notes 28 false false R29.htm 12001 - Disclosure - Accumulated Other Comprehensive Income (Loss) Sheet http://www.fvcbank.com/role/DisclosureAccumulatedOtherComprehensiveIncomeLoss Accumulated Other Comprehensive Income (Loss) Notes 29 false false R30.htm 12101 - Disclosure - Revenue Recognition Sheet http://www.fvcbank.com/role/DisclosureRevenueRecognition Revenue Recognition Notes 30 false false R31.htm 12201 - Disclosure - Parent Company Only Financial Statements Sheet http://www.fvcbank.com/role/DisclosureParentCompanyOnlyFinancialStatements Parent Company Only Financial Statements Notes 31 false false R32.htm 20202 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.fvcbank.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://www.fvcbank.com/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPolicies 32 false false R33.htm 30103 - Disclosure - Organization and Summary of Significant Accounting Policies (Tables) Sheet http://www.fvcbank.com/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesTables Organization and Summary of Significant Accounting Policies (Tables) Tables http://www.fvcbank.com/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPolicies 33 false false R34.htm 30303 - Disclosure - Business Combinations (Tables) Sheet http://www.fvcbank.com/role/DisclosureBusinessCombinationsTables Business Combinations (Tables) Tables http://www.fvcbank.com/role/DisclosureBusinessCombinations 34 false false R35.htm 30403 - Disclosure - Investment Securities and Other Investments (Tables) Sheet http://www.fvcbank.com/role/DisclosureInvestmentSecuritiesAndOtherInvestmentsTables Investment Securities and Other Investments (Tables) Tables http://www.fvcbank.com/role/DisclosureInvestmentSecuritiesAndOtherInvestments 35 false false R36.htm 30503 - Disclosure - Loans and Allowance for Loan Losses (Tables) Sheet http://www.fvcbank.com/role/DisclosureLoansAndAllowanceForLoanLossesTables Loans and Allowance for Loan Losses (Tables) Tables http://www.fvcbank.com/role/DisclosureLoansAndAllowanceForLoanLosses 36 false false R37.htm 30603 - Disclosure - Other Real Estate Owned (Tables) Sheet http://www.fvcbank.com/role/DisclosureOtherRealEstateOwnedTables Other Real Estate Owned (Tables) Tables http://www.fvcbank.com/role/DisclosureOtherRealEstateOwned 37 false false R38.htm 30703 - Disclosure - Goodwill and Intangibles (Tables) Sheet http://www.fvcbank.com/role/DisclosureGoodwillAndIntangiblesTables Goodwill and Intangibles (Tables) Tables http://www.fvcbank.com/role/DisclosureGoodwillAndIntangibles 38 false false R39.htm 30803 - Disclosure - Premises and Equipment (Tables) Sheet http://www.fvcbank.com/role/DisclosurePremisesAndEquipmentTables Premises and Equipment (Tables) Tables http://www.fvcbank.com/role/DisclosurePremisesAndEquipment 39 false false R40.htm 30903 - Disclosure - Deposits (Tables) Sheet http://www.fvcbank.com/role/DisclosureDepositsTables Deposits (Tables) Tables http://www.fvcbank.com/role/DisclosureDeposits 40 false false R41.htm 31003 - Disclosure - Other Borrowed Funds (Tables) Sheet http://www.fvcbank.com/role/DisclosureOtherBorrowedFundsTables Other Borrowed Funds (Tables) Tables http://www.fvcbank.com/role/DisclosureOtherBorrowedFunds 41 false false R42.htm 31103 - Disclosure - Income Taxes (Tables) Sheet http://www.fvcbank.com/role/DisclosureIncomeTaxesTables Income Taxes (Tables) Tables http://www.fvcbank.com/role/DisclosureIncomeTaxes 42 false false R43.htm 31203 - Disclosure - Derivative Financial Instruments (Tables) Sheet http://www.fvcbank.com/role/DisclosureDerivativeFinancialInstrumentsTables Derivative Financial Instruments (Tables) Tables http://www.fvcbank.com/role/DisclosureDerivativeFinancialInstruments 43 false false R44.htm 31303 - Disclosure - Financial Instruments with Off-Balance Sheet Risk (Tables) Sheet http://www.fvcbank.com/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRiskTables Financial Instruments with Off-Balance Sheet Risk (Tables) Tables http://www.fvcbank.com/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRisk 44 false false R45.htm 31403 - Disclosure - Minimum Regulatory Capital Requirements (Tables) Sheet http://www.fvcbank.com/role/DisclosureMinimumRegulatoryCapitalRequirementsTables Minimum Regulatory Capital Requirements (Tables) Tables http://www.fvcbank.com/role/DisclosureMinimumRegulatoryCapitalRequirements 45 false false R46.htm 31603 - Disclosure - Stock-Based Compensation Plan (Tables) Sheet http://www.fvcbank.com/role/DisclosureStockBasedCompensationPlanTables Stock-Based Compensation Plan (Tables) Tables http://www.fvcbank.com/role/DisclosureStockBasedCompensationPlan 46 false false R47.htm 31703 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.fvcbank.com/role/DisclosureFairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.fvcbank.com/role/DisclosureFairValueMeasurements 47 false false R48.htm 31803 - Disclosure - Earnings Per Share (Tables) Sheet http://www.fvcbank.com/role/DisclosureEarningsPerShareTables Earnings Per Share (Tables) Tables http://www.fvcbank.com/role/DisclosureEarningsPerShare 48 false false R49.htm 31903 - Disclosure - Supplemental Cash Flow Information (Tables) Sheet http://www.fvcbank.com/role/DisclosureSupplementalCashFlowInformationTables Supplemental Cash Flow Information (Tables) Tables http://www.fvcbank.com/role/DisclosureSupplementalCashFlowInformation 49 false false R50.htm 32003 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables) Sheet http://www.fvcbank.com/role/DisclosureAccumulatedOtherComprehensiveIncomeLossTables Accumulated Other Comprehensive Income (Loss) (Tables) Tables http://www.fvcbank.com/role/DisclosureAccumulatedOtherComprehensiveIncomeLoss 50 false false R51.htm 32103 - Disclosure - Revenue Recognition (Tables) Sheet http://www.fvcbank.com/role/DisclosureRevenueRecognitionTables Revenue Recognition (Tables) Tables http://www.fvcbank.com/role/DisclosureRevenueRecognition 51 false false R52.htm 32203 - Disclosure - Parent Company Only Financial Statements (Tables) Sheet http://www.fvcbank.com/role/DisclosureParentCompanyOnlyFinancialStatementsTables Parent Company Only Financial Statements (Tables) Tables http://www.fvcbank.com/role/DisclosureParentCompanyOnlyFinancialStatements 52 false false R53.htm 40101 - Disclosure - Organization and Summary of Significant Accounting Policies- Organization (Details) Sheet http://www.fvcbank.com/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesOrganizationDetails Organization and Summary of Significant Accounting Policies- Organization (Details) Details http://www.fvcbank.com/role/DisclosureOrganizationAndSummaryOfSignificantAccountingPoliciesTables 53 false false R54.htm 40201 - Disclosure - Summary of Significant Accounting Policies - Loans and Allowance for Loan Losses (Details) Sheet http://www.fvcbank.com/role/DisclosureSummaryOfSignificantAccountingPoliciesLoansAndAllowanceForLoanLossesDetails Summary of Significant Accounting Policies - Loans and Allowance for Loan Losses (Details) Details 54 false false R55.htm 40202 - Disclosure - Summary of Significant Accounting Policies - Premises and Equipment (Details) Sheet http://www.fvcbank.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPremisesAndEquipmentDetails Summary of Significant Accounting Policies - Premises and Equipment (Details) Details 55 false false R56.htm 40203 - Disclosure - Summary of Significant Accounting Policies - Goodwill and Intangible Assets (Details) Sheet http://www.fvcbank.com/role/DisclosureSummaryOfSignificantAccountingPoliciesGoodwillAndIntangibleAssetsDetails Summary of Significant Accounting Policies - Goodwill and Intangible Assets (Details) Details 56 false false R57.htm 40204 - Disclosure - Summary of Significant Accounting Policies - Other Real Estate Owned (Details) Sheet http://www.fvcbank.com/role/DisclosureSummaryOfSignificantAccountingPoliciesOtherRealEstateOwnedDetails Summary of Significant Accounting Policies - Other Real Estate Owned (Details) Details 57 false false R58.htm 40205 - Disclosure - Summary of Significant Accounting Policies - Income taxes (Details) Sheet http://www.fvcbank.com/role/DisclosureSummaryOfSignificantAccountingPoliciesIncomeTaxesDetails Summary of Significant Accounting Policies - Income taxes (Details) Details 58 false false R59.htm 40206 - Disclosure - Summary of Significant Accounting Policies - Equity-based Compensation (Details) Sheet http://www.fvcbank.com/role/DisclosureSummaryOfSignificantAccountingPoliciesEquityBasedCompensationDetails Summary of Significant Accounting Policies - Equity-based Compensation (Details) Details 59 false false R60.htm 40207 - Disclosure - Summary of Significant Accounting Policies - 401(k) Plan (Details) Sheet http://www.fvcbank.com/role/DisclosureSummaryOfSignificantAccountingPolicies401KPlanDetails Summary of Significant Accounting Policies - 401(k) Plan (Details) Details 60 false false R61.htm 40208 - Disclosure - Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) Sheet http://www.fvcbank.com/role/DisclosureSummaryOfSignificantAccountingPoliciesRecentAccountingPronouncementsDetails Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) Details 61 false false R62.htm 40301 - Disclosure - Business Combinations (Details) Sheet http://www.fvcbank.com/role/DisclosureBusinessCombinationsDetails Business Combinations (Details) Details http://www.fvcbank.com/role/DisclosureBusinessCombinationsTables 62 false false R63.htm 40401 - Disclosure - Investment Securities and Other Investments (Details) Sheet http://www.fvcbank.com/role/DisclosureInvestmentSecuritiesAndOtherInvestmentsDetails Investment Securities and Other Investments (Details) Details http://www.fvcbank.com/role/DisclosureInvestmentSecuritiesAndOtherInvestmentsTables 63 false false R64.htm 40402 - Disclosure - Investment Securities and Other Investments - Continuous Unrealized Loss Position (Details) Sheet http://www.fvcbank.com/role/DisclosureInvestmentSecuritiesAndOtherInvestmentsContinuousUnrealizedLossPositionDetails Investment Securities and Other Investments - Continuous Unrealized Loss Position (Details) Details 64 false false R65.htm 40403 - Disclosure - Investment Securities and Other Investments - Continuous Unrealized Loss Position - Additional information (Details) Sheet http://www.fvcbank.com/role/DisclosureInvestmentSecuritiesAndOtherInvestmentsContinuousUnrealizedLossPositionAdditionalInformationDetails Investment Securities and Other Investments - Continuous Unrealized Loss Position - Additional information (Details) Details 65 false false R66.htm 40404 - Disclosure - Investment Securities and Other Investments - Contractual Maturities (Details) Sheet http://www.fvcbank.com/role/DisclosureInvestmentSecuritiesAndOtherInvestmentsContractualMaturitiesDetails Investment Securities and Other Investments - Contractual Maturities (Details) Details 66 false false R67.htm 40405 - Disclosure - Investment Securities and Other Investments - Contractual Maturities - Additional Information (Details) Sheet http://www.fvcbank.com/role/DisclosureInvestmentSecuritiesAndOtherInvestmentsContractualMaturitiesAdditionalInformationDetails Investment Securities and Other Investments - Contractual Maturities - Additional Information (Details) Details 67 false false R68.htm 40406 - Disclosure - Investment Securities and Other Investments - Other Investments - Additional Information (Details) Sheet http://www.fvcbank.com/role/DisclosureInvestmentSecuritiesAndOtherInvestmentsOtherInvestmentsAdditionalInformationDetails Investment Securities and Other Investments - Other Investments - Additional Information (Details) Details 68 false false R69.htm 40501 - Disclosure - Loans and Allowance for Loan Losses - Summary of loan balances by type (Details) Sheet http://www.fvcbank.com/role/DisclosureLoansAndAllowanceForLoanLossesSummaryOfLoanBalancesByTypeDetails Loans and Allowance for Loan Losses - Summary of loan balances by type (Details) Details 69 false false R70.htm 40502 - Disclosure - Loans and Allowance for Loan Losses - Outstanding principal balance and related carrying amount of acquired loans (Details) Sheet http://www.fvcbank.com/role/DisclosureLoansAndAllowanceForLoanLossesOutstandingPrincipalBalanceAndRelatedCarryingAmountOfAcquiredLoansDetails Loans and Allowance for Loan Losses - Outstanding principal balance and related carrying amount of acquired loans (Details) Details 70 false false R71.htm 40503 - Disclosure - Loans and Allowance for Loan Losses - Allowance for loan losses (Details) Sheet http://www.fvcbank.com/role/DisclosureLoansAndAllowanceForLoanLossesAllowanceForLoanLossesDetails Loans and Allowance for Loan Losses - Allowance for loan losses (Details) Details 71 false false R72.htm 40504 - Disclosure - Loans and Allowance for Loan Losses - Impaired Loans (Details) Sheet http://www.fvcbank.com/role/DisclosureLoansAndAllowanceForLoanLossesImpairedLoansDetails Loans and Allowance for Loan Losses - Impaired Loans (Details) Details 72 false false R73.htm 40505 - Disclosure - Loans and Allowance for Loan Losses - Risk category (Details) Sheet http://www.fvcbank.com/role/DisclosureLoansAndAllowanceForLoanLossesRiskCategoryDetails Loans and Allowance for Loan Losses - Risk category (Details) Details 73 false false R74.htm 40506 - Disclosure - Loans and Allowance for Loan Losses - Past due and Non accrual of loans (Details) Sheet http://www.fvcbank.com/role/DisclosureLoansAndAllowanceForLoanLossesPastDueAndNonAccrualOfLoansDetails Loans and Allowance for Loan Losses - Past due and Non accrual of loans (Details) Details 74 false false R75.htm 40507 - Disclosure - Loans and Allowance for Loan Losses - Troubled debt restructurings (Details) Sheet http://www.fvcbank.com/role/DisclosureLoansAndAllowanceForLoanLossesTroubledDebtRestructuringsDetails Loans and Allowance for Loan Losses - Troubled debt restructurings (Details) Details 75 false false R76.htm 40601 - Disclosure - Other Real Estate Owned (Details) Sheet http://www.fvcbank.com/role/DisclosureOtherRealEstateOwnedDetails Other Real Estate Owned (Details) Details http://www.fvcbank.com/role/DisclosureOtherRealEstateOwnedTables 76 false false R77.htm 40701 - Disclosure - Goodwill and Intangibles - Amortizable intangibles (Details) Sheet http://www.fvcbank.com/role/DisclosureGoodwillAndIntangiblesAmortizableIntangiblesDetails Goodwill and Intangibles - Amortizable intangibles (Details) Details 77 false false R78.htm 40702 - Disclosure - Goodwill and Intangibles - Estimated amortization expense (Details) Sheet http://www.fvcbank.com/role/DisclosureGoodwillAndIntangiblesEstimatedAmortizationExpenseDetails Goodwill and Intangibles - Estimated amortization expense (Details) Details 78 false false R79.htm 40703 - Disclosure - Goodwill and Intangibles - Carrying amount of goodwill (Details) Sheet http://www.fvcbank.com/role/DisclosureGoodwillAndIntangiblesCarryingAmountOfGoodwillDetails Goodwill and Intangibles - Carrying amount of goodwill (Details) Details 79 false false R80.htm 40801 - Disclosure - Premises and Equipment (Details) Sheet http://www.fvcbank.com/role/DisclosurePremisesAndEquipmentDetails Premises and Equipment (Details) Details http://www.fvcbank.com/role/DisclosurePremisesAndEquipmentTables 80 false false R81.htm 40802 - Disclosure - Premises and Equipment - Rent expenses (Details) Sheet http://www.fvcbank.com/role/DisclosurePremisesAndEquipmentRentExpensesDetails Premises and Equipment - Rent expenses (Details) Details 81 false false R82.htm 40901 - Disclosure - Deposits (Details) Sheet http://www.fvcbank.com/role/DisclosureDepositsDetails Deposits (Details) Details http://www.fvcbank.com/role/DisclosureDepositsTables 82 false false R83.htm 41001 - Disclosure - Other Borrowed Funds - Other borrowed funds (Details) Sheet http://www.fvcbank.com/role/DisclosureOtherBorrowedFundsOtherBorrowedFundsDetails Other Borrowed Funds - Other borrowed funds (Details) Details 83 false false R84.htm 41002 - Disclosure - Other Borrowed Funds (Details) Sheet http://www.fvcbank.com/role/DisclosureOtherBorrowedFundsDetails Other Borrowed Funds (Details) Details http://www.fvcbank.com/role/DisclosureOtherBorrowedFundsTables 84 false false R85.htm 41101 - Disclosure - Income Taxes - Deferred tax assets and deferred tax liabilities (Details) Sheet http://www.fvcbank.com/role/DisclosureIncomeTaxesDeferredTaxAssetsAndDeferredTaxLiabilitiesDetails Income Taxes - Deferred tax assets and deferred tax liabilities (Details) Details 85 false false R86.htm 41102 - Disclosure - Income Taxes - Charged to operations (Details) Sheet http://www.fvcbank.com/role/DisclosureIncomeTaxesChargedToOperationsDetails Income Taxes - Charged to operations (Details) Details 86 false false R87.htm 41103 - Disclosure - Income Taxes - Reconciliation of income tax expense (Details) Sheet http://www.fvcbank.com/role/DisclosureIncomeTaxesReconciliationOfIncomeTaxExpenseDetails Income Taxes - Reconciliation of income tax expense (Details) Details 87 false false R88.htm 41104 - Disclosure - Income Taxes - Net operating loss carryforwards (Details) Sheet http://www.fvcbank.com/role/DisclosureIncomeTaxesNetOperatingLossCarryforwardsDetails Income Taxes - Net operating loss carryforwards (Details) Details 88 false false R89.htm 41201 - Disclosure - Derivative Financial Instruments (Details) Sheet http://www.fvcbank.com/role/DisclosureDerivativeFinancialInstrumentsDetails Derivative Financial Instruments (Details) Details http://www.fvcbank.com/role/DisclosureDerivativeFinancialInstrumentsTables 89 false false R90.htm 41301 - Disclosure - Financial Instruments with Off-Balance Sheet Risk (Details) Sheet http://www.fvcbank.com/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRiskDetails Financial Instruments with Off-Balance Sheet Risk (Details) Details http://www.fvcbank.com/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRiskTables 90 false false R91.htm 41401 - Disclosure - Minimum Regulatory Capital Requirements (Details) Sheet http://www.fvcbank.com/role/DisclosureMinimumRegulatoryCapitalRequirementsDetails Minimum Regulatory Capital Requirements (Details) Details http://www.fvcbank.com/role/DisclosureMinimumRegulatoryCapitalRequirementsTables 91 false false R92.htm 41501 - Disclosure - Related Party Transactions (Details) Sheet http://www.fvcbank.com/role/DisclosureRelatedPartyTransactionsDetails Related Party Transactions (Details) Details http://www.fvcbank.com/role/DisclosureRelatedPartyTransactions 92 false false R93.htm 41601 - Disclosure - Stock-Based Compensation Plan (Details) Sheet http://www.fvcbank.com/role/DisclosureStockBasedCompensationPlanDetails Stock-Based Compensation Plan (Details) Details http://www.fvcbank.com/role/DisclosureStockBasedCompensationPlanTables 93 false false R94.htm 41602 - Disclosure - Stock-Based Compensation Plan - Options (Details) Sheet http://www.fvcbank.com/role/DisclosureStockBasedCompensationPlanOptionsDetails Stock-Based Compensation Plan - Options (Details) Details 94 false false R95.htm 41603 - Disclosure - Stock-Based Compensation Plan - Restricted stock (Details) Sheet http://www.fvcbank.com/role/DisclosureStockBasedCompensationPlanRestrictedStockDetails Stock-Based Compensation Plan - Restricted stock (Details) Details 95 false false R96.htm 41701 - Disclosure - Fair Value Measurements - Financial assets and liabilities measured at fair value on a recurring basis (Details) Sheet http://www.fvcbank.com/role/DisclosureFairValueMeasurementsFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails Fair Value Measurements - Financial assets and liabilities measured at fair value on a recurring basis (Details) Details 96 false false R97.htm 41702 - Disclosure - Fair Value Measurements - Assets measured at fair value on a nonrecurring basis (Details) Sheet http://www.fvcbank.com/role/DisclosureFairValueMeasurementsAssetsMeasuredAtFairValueOnNonrecurringBasisDetails Fair Value Measurements - Assets measured at fair value on a nonrecurring basis (Details) Details 97 false false R98.htm 41703 - Disclosure - Fair Value Measurements - Quantitative information about Level 3 fair value measurements (Details) Sheet http://www.fvcbank.com/role/DisclosureFairValueMeasurementsQuantitativeInformationAboutLevel3FairValueMeasurementsDetails Fair Value Measurements - Quantitative information about Level 3 fair value measurements (Details) Details 98 false false R99.htm 41704 - Disclosure - Fair Value Measurements - Carrying amount, fair value and placement in the fair value hierarchy of financial instruments (Details) Sheet http://www.fvcbank.com/role/DisclosureFairValueMeasurementsCarryingAmountFairValueAndPlacementInFairValueHierarchyOfFinancialInstrumentsDetails Fair Value Measurements - Carrying amount, fair value and placement in the fair value hierarchy of financial instruments (Details) Details 99 false false R100.htm 41801 - Disclosure - Earnings Per Share (Details) Sheet http://www.fvcbank.com/role/DisclosureEarningsPerShareDetails Earnings Per Share (Details) Details http://www.fvcbank.com/role/DisclosureEarningsPerShareTables 100 false false R101.htm 41901 - Disclosure - Supplemental Cash Flow Information (Details) Sheet http://www.fvcbank.com/role/DisclosureSupplementalCashFlowInformationDetails Supplemental Cash Flow Information (Details) Details http://www.fvcbank.com/role/DisclosureSupplementalCashFlowInformationTables 101 false false R102.htm 42001 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Details) Sheet http://www.fvcbank.com/role/DisclosureAccumulatedOtherComprehensiveIncomeLossDetails Accumulated Other Comprehensive Income (Loss) (Details) Details http://www.fvcbank.com/role/DisclosureAccumulatedOtherComprehensiveIncomeLossTables 102 false false R103.htm 42101 - Disclosure - Revenue Recognition (Details) Sheet http://www.fvcbank.com/role/DisclosureRevenueRecognitionDetails Revenue Recognition (Details) Details http://www.fvcbank.com/role/DisclosureRevenueRecognitionTables 103 false false R104.htm 42201 - Disclosure - Parent Company Only Financial Statements - Balance sheet (Details) Sheet http://www.fvcbank.com/role/DisclosureParentCompanyOnlyFinancialStatementsBalanceSheetDetails Parent Company Only Financial Statements - Balance sheet (Details) Details 104 false false R105.htm 42202 - Disclosure - Parent Company Only Financial Statements - Statement of Operations (Details) Sheet http://www.fvcbank.com/role/DisclosureParentCompanyOnlyFinancialStatementsStatementOfOperationsDetails Parent Company Only Financial Statements - Statement of Operations (Details) Details 105 false false R106.htm 42203 - Disclosure - Parent Company Only Financial Statements - Statement of Cash Flows (Details) Sheet http://www.fvcbank.com/role/DisclosureParentCompanyOnlyFinancialStatementsStatementOfCashFlowsDetails Parent Company Only Financial Statements - Statement of Cash Flows (Details) Details 106 false false All Reports Book All Reports fvcb-20181231.xml fvcb-20181231.xsd fvcb-20181231_cal.xml fvcb-20181231_def.xml fvcb-20181231_lab.xml fvcb-20181231_pre.xml http://fasb.org/srt/2018-01-31 http://xbrl.sec.gov/invest/2013-01-31 http://xbrl.sec.gov/dei/2018-01-31 http://fasb.org/us-gaap/2018-01-31 true true