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derivative borrowings. Derivative Deposits [Member] Refers to information regarding derivative deposits. Revenue Recognition, Policy [Policy Text Block] us-gaap_SubordinatedBorrowingInterestRate Subordinated Notes, long-term at year end Amendment Flag Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Condensed Financial Information of Parent Company Only Disclosure [Text Block] Current Fiscal Year End Date Statement of Financial Position [Abstract] Document Fiscal Period Focus Other interest and dividends Document Fiscal Year Focus Document Period End Date Document Type Statement of Cash Flows [Abstract] Statement of Stockholders' Equity [Abstract] Document Information [Line Items] Document Information [Table] Entity Public Float Entity Filer Category us-gaap_PropertyPlantAndEquipmentUsefulLife Property, Plant and Equipment, Useful Life Entity Current Reporting Status Entity Voluntary Filers Entity Well-known Seasoned Issuer Furniture and Fixtures [Member] Entity Central Index Key Entity Registrant Name Entity [Domain] Building Improvements [Member] Legal Entity [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Policy [Policy Text Block] Entity Common Stock, Shares Outstanding (in shares) Transfers and Servicing of Financial Assets, Policy [Policy Text Block] us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued Business Acquisition, Equity Interest Issued or Issuable, Number of Shares us-gaap_OperatingLossCarryforwards Operating Loss Carryforwards Trading Symbol us-gaap_EffectiveIncomeTaxRateContinuingOperations Effective tax rates us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments Other Derivatives, Policy [Policy Text Block] Repurchase and Resale Agreements Policy [Policy Text Block] Tax exempt interest and dividend income Assets Net Increase in Cash Net Increase (Decrease) In Cash and Cash Equivalents Marketable Securities, Policy [Policy Text Block] Related Allowance Net cash provided by financing activities us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod Impaired Financing Receivable, Interest Income, Accrual Method us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations Net cash (used in) operating activities us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations Net cash used in investing activities Total Recorded Investment us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash provided by financing activities Recorded Investment With No Allowance us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost Stock-based compensation expense Recorded Investment With Allowance Average Recorded Investment Excess tax benefit on stock-based compensation Tax benefits realized from stock compensation us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation Payment in lieu of fractional shares Unpaid Contractual Principal Balance us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock Payment of dividends on preferred stock State income taxes, net of federal income tax benefit Increase (decrease) due to Statutory federal income tax rate Equity Securities [Member] us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Real Estate Loan [Member] Proceeds from exercise of equity compensation plans Proceeds from employee stock purchase plan Class of Financing Receivable, Type [Domain] Issuance of Series C Preferred Stock Issuance of Series C Preferred Stock Commercial Real Estate Portfolio Segment [Member] Issuance of common stock Class of Financing Receivable, Type [Axis] Residential Portfolio Segment [Member] Consumer Portfolio Segment [Member] us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Financing Receivable Portfolio Segment [Domain] us-gaap_OtherNoninterestExpense Total Expenses Commercial Portfolio Segment [Member] Noninterest expense Total noninterest expense FDIC insurance Financing Receivable Portfolio Segment [Axis] Trade and Loan Receivables, Nonmortgage Loans Held-for-sale, Policy [Policy Text Block] Premises and equipment expenses us-gaap_PaymentsForRepurchaseOfRedeemablePreferredStock Redemption of Preferred Stock Directors compensation Noninterest Expense us-gaap_BusinessCombinationConsiderationTransferred1 Business Combination, Consideration Transferred egbn_PaymentsToAcquireFederalReserveBankStockAndFederalHomeLoanBankStock Purchases of Federal Reserve and Federal Home Loan Bank stock Amount of cash outflow to acquire Federal Reserve Bank stock and Federal Home Loan Bank (FHLB) stock. Finance, Loans and Leases Receivable, Policy [Policy Text Block] egbn_ProceedsFromSaleOfFederalReserveAndFederalHomeLoanBankStock Proceeds from redemption of Federal Reserve and Federal Home Loan Bank stock Amount of cash inflow from sale of Federal Reserve stock or Federal Home Loan Bank (FHLB) stock. us-gaap_PaymentsOfDebtIssuanceCosts Payments of Debt Issuance Costs Cash and Cash Equivalents, Policy [Policy Text Block] Significant Accounting Policies [Text Block] egbn_DebtSecuritiesPercentage Debt Securities Percentage The total percentage of debt securities. Income Tax Disclosure [Text Block] Accounting Policies [Abstract] Increase (decrease) in long-term borrowings Decrease in long-term borrowings Reclassified to Nonperforming Loans [Member] Reclassified loans to Nonperforming loans. Interest Income Recognized Amount of interest income (expense) recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. Credit Facility [Domain] Pass [Member] Credit Facility [Axis] Risk Level, High [Member] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Issuance in long-term borrowings Weighted-average fair value (grant date) for Virginia Heritage Bank ("VHB") options assumed (in dollars per share) Share Based Compensation Arrangement by Share Based Payment Award Options Acquired in Business Combination Weighted Average Grant Date Fair Value The weighted average grant-date fair value of options acquired in business combination during the reporting period as calculated by applying the disclosed option pricing methodology. Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Axis] us-gaap_ProceedsFromIssuanceOfSubordinatedLongTermDebt Proceeds from Issuance of Subordinated Long-term Debt Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] egbn_NoninterestBearingDepositLiabilitiesFairValueDisclosure Noninterest bearing deposits, fair value The aggregate fair value of all domestic and foreign noninterest-bearing deposits liabilities held by the entity. egbn_InterestbearingDepositLiabilitiesFairValueDisclosure Interest bearing deposits, fair value The aggregate fair value of all domestic and foreign interest-bearing deposit liabilities. (Decrease) increase in short-term borrowings Substandard [Member] Doubtful [Member] Goodwill, gross Nature Of Operations [Policy Text Block] The entire disclosure for the nature of an entity's business, major products or services, principal markets including location, and the relative importance of its operations in each business and the basis for the determination, including but not limited to, assets, revenues, or earnings. For an entity that has not commenced principal operations, disclosures about the risks and uncertainties related to the activities in which the entity is currently engaged and an understanding of what those activities are being directed toward. us-gaap_GoodwillImpairedAccumulatedImpairmentLoss Goodwill, accumulated amortization us-gaap_OperatingLeasesRentExpenseNet Operating Leases, Rent Expense, Net Servicing Contracts [Member] Operating Leases of Lessee Disclosure [Table Text Block] us-gaap_RelatedPartyDepositLiabilities Related Party Deposit Liabilities Anti-dilutive shares (in shares) us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding Average common shares outstanding-diluted (in shares) us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty Related Party Transaction, Expenses from Transactions with Related Party (Decrease) increase in customer repurchase agreements Core Deposits [Member] us-gaap_RelatedPartyTransactionAmountsOfTransaction Related Party Transaction, Amounts of Transaction Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Diluted (in dollars per share) Diluted net income per common share (in dollars per share) us-gaap_FinancingReceivableModificationsRecordedInvestment Financing Receivable, Modifications, Recorded Investment Average common shares outstanding (in shares) Diluted: us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 Financing Receivable, Modifications, Subsequent Default, Recorded Investment Related Party [Domain] us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 Financing Receivable, Modifications, Pre-Modification Recorded Investment Related Party [Axis] Basic (in dollars per share) Basic net income per common share (in dollars per share) Troubled debt restructings us-gaap_FinancingReceivableModificationsNumberOfContracts2 Financing Receivable, Modifications, Number of Contracts Related Party Transactions Disclosure [Text Block] us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1 Financing Receivable, Modifications, Subsequent Default, Number of Contracts Basic: Schedule of Financing Receivables, Non Accrual Status [Table Text Block] Increase in deposits Troubled Debt Restructurings on Financing Receivables [Table Text Block] Impaired Financing Receivables [Table Text Block] Goodwill, additions Goodwill, Period Increase (Decrease) us-gaap_LoansAndLeasesReceivableRelatedParties Balance Balance Condensed Cash Flow Statement [Table Text Block] Notional amount Derivative, Notional Amount us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash used in investing activities Cash Flows From Financing Activities: Business Combination Disclosure [Text Block] Performing Financial Instruments [Member] Condensed Income Statement [Table Text Block] Nonperforming Financial Instruments [Member] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Domain] Financing Receivable Credit Quality Indicators [Table Text Block] Condensed Balance Sheet [Table Text Block] Current loans Long-term Debt, Type [Axis] us-gaap_PaymentsToAcquireLifeInsurancePolicies Purchases of BOLI Loans past due Long-term Debt, Type [Domain] Quarterly Financial Information [Table Text Block] Nonaccrual loan, recorded investment Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Financing Receivables, 60 to 89 Days Past Due [Member] Financing Receivables, Equal to Greater than 90 Days Past Due [Member] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Financing Receivables, 30 to 59 Days Past Due [Member] Financing Receivables, Period Past Due [Axis] Investments Classified by Contractual Maturity Date [Table Text Block] Financing Receivables, Period Past Due [Domain] Schedule of Unrealized Loss on Investments [Table Text Block] Past Due Financing Receivables [Table Text Block] Schedule of Available-for-sale Securities Reconciliation [Table Text Block] egbn_PaymentToAcquireAnnuity Purchases of annuities Cash outflow during the period for purchases of annuities. Schedule of Intangible Assets and Goodwill [Table Text Block] us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired Acquisition of Virginia Heritage, net of cash Fair Value Measurements, Nonrecurring [Table Text Block] Fair Value, Assets Measured on Recurring Basis [Table Text Block] us-gaap_PaymentsToAcquireBusinessesGross Payments to Acquire Businesses, Gross us-gaap_PaymentsForProceedsFromInvestments Investment in subsidiary (net) Series B Preferred Stock [Member] Series C Preferred Stock [Member] Payment in lieu of fractional shares Amount of cash paid in lieu of fractional shares. us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet Total Income Quarterly Financial Information [Text Block] Class of Stock [Axis] Class of Stock [Domain] us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount Debt Instrument, Unused Borrowing Capacity, Amount Proceeds from maturities of available for sale securities Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Proceeds from sale of available-for-sale securities Proceeds from Sale of Available-for-sale Securities Proceeds from sale/call of available for sale securities Banking Services [Member] Represents a banking office which the Company offers its products and services through. Proceeds from sale of other real estate owned Proceeds from Sale of Other Real Estate Lending Services [Member] Represents a lending center which the Company offers products and services through. egbn_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDepositLiabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposit Liabilities Amount of deposit liabilities assumed at the acquisition date. Schedule of Debt [Table Text Block] Virginia Heritage Bank [Member] The entity Virginia Heritage Bank. Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] us-gaap_PaymentsToAcquireAvailableForSaleSecurities Purchases of available for sale investment securities egbn_BusinessCombinationFairValueCreditMarkOnLoanPortfolio Business Combination, Fair Value Credit Mark on Loan Portfolio Represents a decrease in the loan portfolio due to a fair value credit mark as the result of a business acquisition. Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 Debt Instrument, Basis Spread on Variable Rate Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] us-gaap_DebtInstrumentInterestRateStatedPercentage Debt Instrument, Interest Rate, Stated Percentage us-gaap_DebtInstrumentFaceAmount Debt Instrument, Face Amount Schedule of Cash Proceeds Received from Share-based Payment Awards [Table Text Block] us-gaap_DebtInstrumentRepurchaseAmount Debt Instrument, Repurchase Amount Transfers from other real estate owned to loans Transfers from loans to other real estate owned Non-Cash Investing Activities Supplemental Cash Flows Information: London Interbank Offered Rate (LIBOR) [Member] Debt Instrument [Axis] Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] Federal Funds Effective Swap Rate [Member] Debt Instrument, Name [Domain] Prime Rate [Member] Variable Rate [Axis] Variable Rate [Domain] Liability Class [Axis] Fair Value by Liability Class [Domain] us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Bank premises and equipment acquired Realized gain (loss) included in earnings - net mortgage banking derivatives Realized loss (gain) included in earnings - net mortgage banking derivatives Adjustment for common share equivalents (in shares) Offsetting Liabilities [Table Text Block] us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity Line of Credit Facility, Maximum Borrowing Capacity Interest-bearing Deposits [Member] Preferred Stock Dividends Net income available to common shareholders Net Income Available to Common Shareholders Cash and Cash Equivalents [Domain] us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue Beginning balance Ending balance Cash and Cash Equivalents [Axis] Net Income Net Income Cash and Cash Equivalents Disclosure [Text Block] us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue Beginning balance Ending balance Performance Shares [Member] us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements Principal redemption Warrant [Member] Restricted Stock [Member] Employee Stock Option [Member] Purchases of available-for-sale securities Decrease (increase) in interest bearing deposits with other banks and short-term investments Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Debt Disclosure [Text Block] Liabilities measured at fair value on a recurring basis Earnings Per Share [Text Block] us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash provided by operating activities Cash Flows From Investing Activities: Earnings Per Common Share Increase in other liabilities us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax Less: Reclassification adjustment for losses included in net income, tax Total unrealized gain (loss) on derivatives, tax Property, Plant and Equipment Disclosure [Text Block] Property, Plant and Equipment [Table Text Block] Net unrealized gain (loss) on derivatives, tax Parent Company [Member] us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax Less: Reclassification adjustment for net gains included in net income, tax Net unrealized gain (loss) on securities available-for-sale, tax us-gaap_OtherLiabilitiesFairValueDisclosure Borrowings, fair value us-gaap_PolicyTextBlockAbstract Accounting Policies Fair Value, Measurement Inputs, Disclosure [Text Block] Total unrealized gain (loss) on securities available-for-sale, tax us-gaap_ComprehensiveIncomeNetOfTax Comprehensive Income us-gaap_PreferredStockSharesOutstanding Preferred Stock, Shares Outstanding us-gaap_SharesOutstanding Balance (in shares) Balance (in shares) Common stock, shares outstanding (in shares) Subordinated Debt [Member] us-gaap_AllocatedShareBasedCompensationExpense Allocated Share-based Compensation Expense Financing Receivable, Allowance for Credit Losses, Policy or Methodology Change [Policy Text Block] Preferred stock dividends Preferred stock dividends Loans individually evaluated for impairment Loans collectively evaluated for impairment Collectively evaluated for impairment us-gaap_IncreaseDecreaseInOtherOperatingAssets Increase in other assets Individually evaluated for impairment Tax benefits realized from stock compensation us-gaap_IncreaseDecreaseInDeferredIncomeTaxes Deferred income tax benefit Intangible assets, additions Allowance for Credit Losses on Financing Receivables [Table Text Block] Stock-based compensation Letters of credit Recoveries of loans previously charged-off us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts Shares issued in public offering, issuance costs Eagle Commercial Ventures, LLC [Member] The legal entity, Eagle Commercial Ventures, LLC, a subsidiary of the Company. egbn_NumberOfHigherRiskLendingTransactionsOutstanding Number of Higher Risk Lending Transactions Outstanding The number of higher risk lending transactions outstanding. us-gaap_AllowanceForLoanAndLeaseLossesAdjustmentsNet Net loans (charged-off) recoveries us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs Loans charged-off egbn_SecuritiesHoldingsOfAnyOneIssuerExceedingTenPercentOfShareholdersEquity Securities Holdings of Any One Issuer Exceeding Ten Percent of Shareholders' Equity Securities held by any one issuer exceeding 10% of shareholders' equity. us-gaap_StockRedeemedOrCalledDuringPeriodShares Stock Redeemed or Called During Period, Shares Redemption of Series B & C Preferred Stock (in shares) us-gaap_StockRedeemedOrCalledDuringPeriodValue Stock Redeemed or Called During Period, Value Redemption of Series B & C Preferred Stock Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block] Common stock issued to effect merger with Virginia Heritage (in shares) us-gaap_LessorLeasingArrangementsOperatingLeasesRenewalTerm Lessor Leasing Arrangements, Operating Leases, Renewal Term Mortgage Banking Derivative [Member] Derivative instrument whose primary underlying risk is tied to mortgage. Common stock issued to effect merger with Virginia Heritage egbn_ImpairedFinancingReceivableRecordedInvestmentFairValue Impaired loans Fair value amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. Issuance of common stock related to employee stock purchase plan (in shares) Derivative Assets and Liabilities [Member] Derivative financial instruments and obligations. Issuance of common stock related to employee stock purchase plan us-gaap_LoansReceivableFairValueDisclosure Loans, fair value us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised Exercised (in shares) us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures Vesting of restricted stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares) Fair Value, by Balance Sheet Grouping [Table Text Block] Restricted stock awards (in shares) Vesting of restricted stock awards issued at date of grant, net of shares withheld for payroll taxes Restricted stock awards Issuance of common stock related to options exercised, net of shares withheld for payroll taxes (in shares) Issuance of common stock related to options exercised, net of shares withheld for payroll taxes us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost Defined Benefit Plan, Net Periodic Benefit Cost us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod Forfeited (in shares) Customer repurchase agreements, carrying value An agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Issued (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross egbn_CustomerRepurchaseAgreementsFairValue Customer repurchase agreements, fair value An agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified fair value price. us-gaap_StockIssuedDuringPeriodSharesNewIssues Shares issued in public offering, net of issuance costs (in shares) Issuance of Series C Preferred Stock (in shares) us-gaap_IncreaseDecreaseInOtherLoans Net increase in loans us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale Origination of loans held for sale Issuance of Series C Preferred Stock us-gaap_StockIssuedDuringPeriodValueNewIssues Shares issued in public offering, net of issuance costs Total Liabilities and Shareholders' Equity Total Liabilities and Shareholders' Equity Retained earnings Accumulated other comprehensive (loss) income Balance at Beginning of Period Balance at End of Period egbn_TimeDepositsFairValue Certificates of deposit, fair value Fair value amount of deposits that cannot be withdrawn before a set date without penalty or for which notice of withdrawal is required. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts. Proceeds from sale of loans held for sale Quarter to Date [Member] Quarter to Date. Fiscal year. Year to Date [Member] Fiscal Year egbn_SaleOfLoanReceivableEstimatedLoss Sale of Loan Receivable, Estimated Loss The estimated loss in merger transaction included an adjustment to the intangible. egbn_SaleOfLoanReceivableSellingPrice Sale of Loan Receivable, Selling Price The selling price of the indirect consumer loan portfolio acquired in the Merger under the contract. Owner Occupied and Construction [Member] Borrowings for owner occupied commercial real estate and construction loans. Land Acquisition Development and Construction Loans [Member] A borrowing arrangement which provides the entity funds to purchase or develop land, or effect construction. Preferred Term [Member] Represents the preferred term for a financial instrument. Income Producing Portfolio Segment [Member] Portfolio segment of the company's total financing receivables related to income producing receivables. Construction Portfolio Segment [Member] Portfolio segment of the company's total financing receivables related to construction receivables. Owner Occupied Portfolio Segment [Member] Portfolio segment of the company's total financing receivables related to owner occupied receivables. us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight Class of Warrant or Right, Number of Securities Called by Each Warrant or Right Commercial and Industrial Loan [Member] Loan based on the equity of the borrower's commercial and industrial property in which the borrower receives the loan amount upfront. Commercial and Residential Loan [Member] Loan based on the equity of the borrower's commercial and residential property in which the borrower receives the loan amount upfront. Other Consumer Portfolio Segment [Member] Portfolio segment of the company's total financing receivables related to other consumer receivables. us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights Class of Warrant or Right, Number of Securities Called by Warrants or Rights Home Equity Portfolio Segment [Member] Portfolio segment of the company's total financing receivables related to home equity receivables. Statement of Comprehensive Income [Abstract] us-gaap_DeferredIncomeTaxExpenseBenefit Total deferred us-gaap_CashSurrenderValueFairValueDisclosure Annuity investment, fair value us-gaap_LoansHeldForSaleFairValueDisclosure Loans held for sale, fair value us-gaap_CashAndCashEquivalentsFairValueDisclosure Cash and due from banks, fair value us-gaap_AssetsFairValueDisclosureNonrecurring Total assets measured at fair value on a nonrecurring basis Gross amounts not offset in the balance sheet net amount Gross amounts offset in the balance sheet Assets measured at fair value on a recurring basis us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities Tax benefits realized from stock compensation Stock-based compensation expense Basis points Common stock, par value $.01 per share; shares authorized 100,000,000, shares issued and outstanding 34,023,850 and 33,467,893, respectively us-gaap_TableTextBlock Notes Tables us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments Securities premium amortization (discount accretion), net us-gaap_DerivativeCollateralRightToReclaimCash Gross amounts not offset in the balance sheet cash collateral posted Common stock, shares issued (in shares) Common stock, shares authorized (in shares) us-gaap_DerivativeNetLiabilityPositionAggregateFairValue Derivative, Net Liability Position, Aggregate Fair Value Depreciation and amortization US Government Agencies Debt Securities [Member] us-gaap_Depreciation Depreciation Common stock, par value (in dollars per share) us-gaap_CommonStockCapitalSharesReservedForFutureIssuance Common Stock, Capital Shares Reserved for Future Issuance us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate Customer repurchase agreements and federal funds purchased, short term at year end us-gaap_PreferredStockLiquidationPreference Preferred Stock, Liquidation Preference Per Share Gain on sale of loans Gains on sale of loans Fair value Over five years Adjustments to reconcile net income to net cash provided by operating activities: Total Three to five years One to three years Within one year Interest paid Income taxes paid us-gaap_OperatingLeasesFutureMinimumPaymentsDue Total minimum lease payments us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter Thereafter us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears 2020 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears 2021 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears 2018 Recorded investment in loans: us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears 2019 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent 2017 Derivative Financial Instruments, Liabilities [Member] us-gaap_PreferredStockDividendRatePercentage Preferred Stock, Dividend Rate, Percentage Interest Rate Swap [Member] Warrant Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block] Additional paid in capital us-gaap_MortgageLoansOnRealEstateWritedownOrReserveAmount1 Mortgage Loans on Real Estate, Write-down or Reserve, Amount Shareholders' Equity Cash Flows From Operating Activities: Statement [Line Items] Pay rate Financial Instrument [Axis] Financial Instruments [Domain] Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Maturity AOCI Attributable to Parent [Member] us-gaap_DerivativeNumberOfInstrumentsHeld Derivative, Number of Instruments Held Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Other Commitments [Domain] Other Commitments [Axis] Schedule of Derivative Instruments [Table Text Block] us-gaap_Liabilities Total Liabilities Discussion of Hybrid Instruments and Embedded Derivatives [Text Block] Other liabilities Other comprehensive income (loss), net of tax Other comprehensive (loss) income Other comprehensive income (loss), net of tax Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value Hierarchy [Domain] Other comprehensive income (loss), before tax Other comprehensive income (loss), tax Fair Value, Inputs, Level 1 [Member] Fair Value, Hierarchy [Axis] Total unrealized gain (loss) on derivatives, before tax us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax Less: Reclassification adjustment for losses included in net income, before tax Net unrealized gain (loss) on derivatives, before tax Total unrealized gain (loss) on securities available-for-sale, before tax Net amounts of liabilities presented in the balance sheet Derivative Liability us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax Less: Reclassification adjustment for net gains included in net income, before tax Net unrealized gain (loss) on securities available-for-sale, before tax Watch and Special Mention [Member] This item represents an internal assessment rating of Watch and Special Mention. Amortized cost us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis Gross unrealized gains Gross unrealized losses us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent Total unrealized gain (loss) Total unrealized gain (loss) on derivatives, net of tax Amortized cost Total Shareholders’ Equity Total Shareholders' Equity Balance Balance Unrealized loss on derivatives us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax Reclassification adjustment for losses included in net income Less: Reclassification adjustment for losses included in net income, net of tax Retained Earnings [Member] Available-for-sale securities in a continuous loss position, 12 months or greater, unrealized losses Exercisable options, weighted-average exercise price (in dollars per share) Available-for-sale securities in a continuous loss position, unrealized losses Additional Paid-in Capital [Member] us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent Total unrealized (loss) gain Total unrealized gain (loss) on securities available-for-sale, net of tax Available-for-sale securities in a continuous loss position, less than 12 months, unrealized losses Number of Contracts Number of financing receivables outstanding that have been modified by troubled debt restructurings. Outstanding options, exercise price range, upper limit (in dollars per share) Preferred Stock [Member] us-gaap_DeferredRentCredit Deferred rent us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax Reclassification adjustment for net gains included in net income Less: Reclassification adjustment for net gains included in net income, net of tax Unrealized (loss) gain on securities available for sale Net unrealized gain (loss) on securities available-for-sale, net of tax Outstanding options, exercise price range, lower limit (in dollars per share) Common Stock [Member] Equity Components [Axis] Exercise Price Range [Axis] Equity Component [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] Expected dividends Borrowings, carrying value Risk-free rate Long-term borrowings Available-for-sale securities in a continuous loss position, number of securities Other Liabilities [Member] Interest Rate Swap 2 [Member] Forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period. Weighted-Average volatility Interest Rate Swap 1 [Member] Forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period. Expected volatility Interest Rate Swap 3 [Member] Forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period. Other Assets [Member] Expected term (in years) (Year) Available-for-sale securities in a continuous loss position, 12 months or greater, estimated fair value Available-for-sale securities in a continuous loss position, estimated fair value Available-for-sale securities in a continuous loss position, less than 12 months, estimated fair value Other comprehensive (loss) income, net of tax: Unfunded lines of credit Long-term Line of Credit Estimated fair value, without maturity date us-gaap_OtherComprehensiveIncomeLossNetOfTax Net other comprehensive income (loss) during period us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue Forfeited (in dollars per share) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue Unvested at beginning (in dollars per share) Unvested at end (in dollars per share) Subordinated Notes, long-term at year end us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue Issued (in dollars per share) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue Vested (in dollars per share) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Unvested at beginning (in shares) Unvested at end (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod Forfeited (in shares) Other comprehensive income (loss) before reclassifications us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax Amounts reclassified from accumulated other comprehensive income (loss) Issued (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Five years through ten years, estimated fair value After ten years, estimated fair value After ten years, estimated fair value us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod Vested (in shares) egbn_RetirementAge Retirement Age Age for retirement for calculation of benefit under SERP Agreements. One year or less, estimated fair value egbn_TimePeriodForCalculatingBaseSalaryUnderSERPAgreements Time Period for Calculating Base Salary Under SERP Agreements Base salary for benefit under Supplement Executive Retirement and Death Benefit Agreements, time period used to calculate. After one year through five years, estimated fair value Supplemental Executive Retirement and Death Benefit Agreements [Member] This item represents characteristics of supplemental executive retirement and death benefit agreements. egbn_RetirementPlanMonthlyInstallments Retirement Plan Monthly Installments Number of monthly installments, under the SERP Agreements. Purchased Fixed Annuity for Financing Retirement Benefits [Member] This item represents details relating to purchased fixed annuity contracts for financing retirement benefits. Amortized cost, without maturity date Computer Equipment [Member] us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Balance Sheet Location [Domain] After ten years, amortized cost After one year through five years, amortized cost Balance Sheet Location [Axis] Stock options exercisable (in shares) Five years through ten years, amortized cost Intrinsic value of stock options exercised One year or less, amortized cost us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Weighted-average fair value (grant date) (in dollars per share) Outstanding options, weighted-average remaining contractual life (Year) Total, short term at year end us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses Available-for-sale Securities, Gross Realized Losses Customer repurchase agreements us-gaap_AvailableForSaleSecuritiesGrossRealizedGains Available-for-sale Securities, Gross Realized Gains Outstanding options, weighted-average exercise price (in dollars per share) Beginning balance (in dollars per share) Ending balance (in dollars per share) Expired (in dollars per share) Forfeited (in dollars per share) Issued (in dollars per share) Exercised (in dollars per share) Maximum [Member] Minimum [Member] Range [Axis] Range [Domain] us-gaap_LoansReceivableNet Loans Receivable, Net Stock options outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Loans held for sale us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod Expired (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Corporate Debt Securities [Member] Financial Instruments Disclosure [Text Block] US States and Political Subdivisions Debt Securities [Member] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Available-for-sale Securities [Table Text Block] Preferred Stock [Text Block] us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1 Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Compensation and Employee Benefit Plans [Text Block] Products and Services [Domain] Products and Services [Axis] Unfunded loan commitments Plan Name [Axis] Plan Name [Domain] Issuance of common stock in full redemption of warrants Equity impact of the value of new stock issued during the period due to the redemption of warrants. Additions us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1 Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds Repayments Issuance of common stock in full redemption of warrants (in shares) Stock Issued During Period, Shares, Redemption of Warrants Number of new stock issued during the period due to the redemption of warrants. us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Award Type [Axis] Equity Award [Domain] us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions Tax benefits realized from stock compensation us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans egbn_ConvertibleStockCashReceivedPerShare Convertible Stock Cash Received Per Share The dollar amount each share of common stock can be converted into. egbn_LoansFairValueAtAcquisition Loans Fair Value At Acquisition Loans acquired in a business combination, at fair value of the receivables acquired, for both loans transferred in and otherwise accounted for. Scenario, Unspecified [Domain] Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Scenario [Axis] Total, balance us-gaap_Deposits Total deposits Disclosure of Compensation Related Costs, Share-based Payments [Text Block] egbn_BusinessCombinationSharesIssuedForEachAcquireesShareConverted Business Combination Shares Issued For Each Acquirees Share Converted The number of shares issued for each acquiree's share converted in a business combination. The Fidelity Plans [Member] This item represents characteristics of the Fidelity Plan under share-based compensation arrangements. Interest bearing transaction, balance Interest bearing transaction Noninterest bearing demand, balance Noninterest bearing demand Statement [Table] Certificates of deposit, carrying value Total Savings and money market Commitments and Contingencies Disclosure [Text Block] Stock Plan 2006 [Member] Stock plan adopted in 2006. Loans Not Impaired [Member] Represents loans that are not considered to be impaired. Income Statement [Abstract] Gross amounts of recognized liabilities The 2011 ESPP [Member] Name of stock plan. Specific allowance Derivative Contract [Domain] Derivative Instrument [Axis] The2016 Plan [Member] Represents information about the 2016 Plan. us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1 Deferred Compensation Arrangement with Individual, Requisite Service Period Investment Type [Axis] Investments [Domain] Changes in Accretable Yield [Table Text Block] The tabular disclosure for changes in the accretable yield. egbn_NumberOfSubleasedPremises Number of Subleased Premises The number of premises subleased for use by the company. us-gaap_RestrictedInvestmentsAtFairValue Federal Reserve and Federal Home Loan Bank stock, fair value us-gaap_OtherRealEstateDisposals Properties sold us-gaap_OtherRealEstateValuationAdjustments Valuation allowance Intangible assets and goodwill, additions Amount of increase (decrease) in intangible assets and goodwill during the period. Real estate acquired from borrowers Intangible assets and goodwill, gross Gross carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Other Real Estate, Roll Forward [Table Text Block] egbn_IntangibleAssetsAndGoodwillAccumulatedAmortization Intangible assets and goodwill, accumulated amortization Accumulated amount of amortization of assets,lacking physical substance with a finite life. Also includes amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Income Tax Expense Total income tax expense Tax expense Equity in Undistributed Income of Subsidiaries Equity in undistributed income of subsidiary Hedging Activities [Member] Represents hedging activities. Income before income tax expense Income Before Income Tax Expense Residential Mortgage Backed Securities [Member] Range 2 [Member] This item represents the second range of exercise prices for share-based compensation arrangements. Range 1 [Member] This item represents the first range of exercise prices for share-based compensation arrangements. Range 4 [Member] This item represents the fourth range of exercise prices for share-based compensation arrangements. Range 3 [Member] This item represents the third range of exercise prices for share-based compensation arrangements. egbn_LoanPeriod Loan Period Period of time between origination and maturity of a loan, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Home Equity Line of Credit [Member] Counter Party 1 [Member] Represents Counter Party number 1. egbn_DebtSecuritiesWeightedAverageDuration Debt Securities Weighted Average Duration Period of time between issuance and maturity of debt securities, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Equity Investment Other [Member] Equity investment other member. egbn_PercentOfLoanPortfolio Percent Of Loan Portfolio Percent of loan portfolio. Counter Party 2 [Member] Represents Counter Party number 2. Commercial Real Estateand Real Estate Construction Loans [Member] Commercial real estateand real estate construction loans member. Excluding Owner Occupied Commercial Real Estate And Commercial Construction Loans [Member] Excluding owner occupied commercial real estate and commercial construction loans member. egbn_TimeDeposists250000OrMore Time Deposists, $250,000 or More Amount of time deposit liabilities, including certificates of deposit, in denominations of $250,000 or more. egbn_LoanToValueRatio Loan To Value Ratio Loan to value ratio. egbn_MinimumDebtServiceCoverage Minimum Debt Service Coverage This item represents the minimum debt service coverage. egbn_InterestRateAdjustmentFrequency Interest Rate Adjustment Frequency Frequency in which interest rate adjustments are made. Real Estate Owned [Text Block] S B A Loans [Member] S b a loans member. Residential Mortgage Loan Long Term [Member] Residential mortgage loan long term member. egbn_StressTestAssumptionIncreaseInterestRates Stress Test Assumption Increase Interest Rates This item represents the estimated increase in interest rates for performing the Company's stress tests. egbn_AmortizationTerm Amortization Term Amortization period for loans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Deferred loan fees and costs Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred loan fees and costs. A D C Loans [Member] A d c loans member. Loans, percent Percent of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. us-gaap_UnrealizedGainLossOnDerivatives Unrealized Gain (Loss) on Derivatives Preferred Stock, Series B & C [Member] Information about series B and C preferred stock. Schedule of Recorded Investment in Loans [Table Text Block] Tabular disclosure of the recorded investment in loans. Changes In Amounts Of Loans Outstanding [Table Text Block] Tabular disclosure of related party loans. egbn_ReductionOfRentExpense Reduction Of Rent Expense Reduction of rent expense. Gain on sale of investment securities Fidelity [Member] Fidelity member. Excess Servicing [Member] Excess servicing member. egbn_FutureEstimatedAmortizationExpenseTotal Total Future estimated amortization expense total. Deposit Composition And Interest Rate [Table Text Block] Deposit composition and interest rate table text block. egbn_WeightedAverageInterestRateInterestBearingTransactionDeposits Interest bearing transaction Weighted average interest rate interest bearing transaction deposits. Savings and money market, balance egbn_DepositsSavingsAndMoneyMarketDeposits Deposits savings and money market deposits. Counterparty Name [Domain] egbn_WeightedAverageInterestRateSavingsAndMoneyMarketDeposits Savings and money market Weighted average interest rate savings and money market deposits. Three months or less Contractual maturities time deposits three months or less. More than three months through six months Contractual maturities time deposits three months through six months. Counterparty Name [Axis] More than six months through twelve months Contractual maturities time deposits six months through12 months. Over twelve months Contractual maturities time deposits after12 months. Interest Expense On Deposits [Table Text Block] Interest expense on deposits table text block. us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield egbn_InterestExpenseInterestBearingTransactionDeposits Interest bearing transaction Interest expense interest bearing transaction deposits. Federal Funds [Member] Federal funds member. C D A R S [Member] C d a r s member. I N D [Member] I n d member. Tier 1 capital (to average assets) minimum required for capital adequacy purposes Tier 1 capital (to average assets) to be well capitalized under prompt corrective action regulations us-gaap_GainLossOnSaleOfSecuritiesNet Net gain on sale of investment securities Tier 1 capital (to average assets) actual ratio Year End [Member] Year end member. Total capital (to risk weighted assets) to be well capitalized under prompt corrective action regulations Realized gain on sale of investment securities Average Daily Balance [Member] Average daily balance member. us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net Month End Balance [Member] Month end balance member. Total capital (to risk weighted assets) actual ratio Total capital (to risk weighted assets) minimum required for capital adequacy purposes us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance egbn_DeferredTaxLiabilitiesUnrealizedGainOnSecuritiesAvailableForSale Unrealized gain on securities available for sale Deferred tax liabilities unrealized gain on securities available for sale. Tier 1 capital (to risk weighted assets) minimum required for capital adequacy purposes Tier 1 capital (to risk weighted assets) to be well capitalized under prompt corrective action regulations egbn_OwnershipInterestInTrust Ownership Interest In Trust Ownership interest in trust. Limited Liability Company A [Member] Limited liability company a member. us-gaap_DefinedContributionPlanCostRecognized Defined Contribution Plan, Cost Recognized Tier 1 capital (to risk weighted assets) actual ratio egbn_EmployeeStockPurchasePlanPercentageOfMarketValue Employee Stock Purchase Plan Percentage Of Market Value Employee stock purchase plan percentage of market value. Total capital (to risk weighted assets) actual amount Minimum Months Per Year [Member] Minimum months per year member. egbn_AmountContributedToESPP Amount Contributed to ESPP Amounts contributed to Employee Stock Purchase Plans during the period. Federal Reserve Bank of Richmond [Member] Represents the Federal Reserve Bank of Richmond. Pay Period [Member] Pay period member. Loan Agreement and Related Stock Security Agreement [Member] Represents the loan agreement and related stock security agreement. Offering Period [Member] Offering period member. Other expenses Annually [Member] Annually member. Current Portion [Member] Represents the current portion of debt. Tier 1 capital (to average assets) actual amount egbn_DeferredCompensationArrangementWithIndividualMinimumAge Deferred Compensation Arrangement With Individual Minimum Age Deferred compensation arrangement with individual minimum age. Tier 1 capital (to risk weighted assets) actual amount us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value egbn_LoanCommitmentsOutstandingAndLinesAndLettersOfCredit Total Loan commitments outstanding and lines and letters of credit. Bank [Member] Bank member. Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] egbn_IncomeLossFromContinuingOperationsBeforeEquityInUndistributedIncomeOfSubsidiaries Loss Before Equity in Undistributed Income of Subsidiaries Income loss from continuing operations before equity in undistributed income of subsidiaries. Salaries and employee benefits Balance at January 1, Balance at December 31, us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield Regulatory Capital Requirements under Banking Regulations [Text Block] Accretion Virginia Heritage (in dollars per share) The weighted-average exercise price of stock options acquired in a business combination. Virginia Heritage (in shares) Number of share options (or share units) acquired in business combination. Termination Option One [Member] The first termination option available under a commitment or contractual obligation. egbn_OptionToTerminate Option to Terminate Amount of time, after which, the company has the option to terminate the agreement. egbn_ContractualObligationOptionPeriod Contractual Obligation, Option Period Represents the option period for a contractual obligation. George Mason Sponsorship [Member] Represents obligations associated with George Mason sponsorship. Termination Option Two [Member] The second termination option available under a commitment or contractual obligation. egbn_IncreaseDecreaseInContractualObligationTerminationOption Increase (Decrease) in Contractual Obligation, Termination Option Amount of increase (decrease) in contractual obligations if the contract is terminated. Effective June 30, 2025 [Member] A scenario that goes into effect June 30, 2025. Effective June 30, 2030 [Member] A scenario that goes into effect June 30, 2030. us-gaap_GainsLossesOnSalesOfOtherRealEstate Gains (Losses) on Sales of Other Real Estate Net (gain) loss on sale of other real estate owned Borrowed Funds [Member] Represents obligations associated with borrowed funds. Operating Lease Obligations [Member] Represents obligations associated with operating lease obligations. Deposits Without a Stated Maturity [Member] Represents obligations associated with deposits without a stated maturity. Time Deposits [Member] Represents obligations associated with time deposits. Loss on early extinguishment of debt Gain (Loss) on Extinguishment of Debt Loss on early extinguishment of debt Outside Data Processing [Member] Represents obligations associated with outside data processing. Non-compete Agreement [Member] Represents obligations associated with a non-compete agreement. Liabilities and Shareholders' Equity Liabilities us-gaap_Assets Total Assets Merger expenses Business Combination, Acquisition Related Costs CET1 capital (to risk weighted aseets) actual amount The amount of CET1 capital as defined in the regulations. CET1 capital (to risk weighted aseets) to be well capitalized under prompt corrective action regulations The CET1 risk based capital ratio (CET1 capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action. CET1 capital (to risk weighted aseets) actual ratio CET1 capital divided by risk weighted assets as defined in the regulations. CET1 capital (to risk weighted aseets) minimum required for capital adequacy purposes The minimum CET1 risk based capital ratio (CET1 capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. Decrease in value of other real estate owned us-gaap_GoodwillImpairmentLoss Goodwill, Impairment Loss Other assets us-gaap_AmortizationOfIntangibleAssets Amortization of Intangible Assets Federal Reserve and Federal Home Loan Bank stock, carrying value us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear Federal Home Loan Bank, long-term average daily balance Federal Home Loan Bank, long-term average daily balance us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization Intangible assets, accumulated amortization us-gaap_FiniteLivedIntangibleAssetsNet Finite-Lived Intangible Assets, Net Federal Home Loan Bank, long-term maximum month-end balance Intangible assets, gross us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate Federal Home Loan Bank – current portion, short term at year end us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances Marketing and advertising Legal, accounting and professional fees Data processing Ineffective portion recognized in income on derivatives Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net Goodwill, net Goodwill us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment Less accumulated depreciation and amortization Premises and equipment, net Total premises and equipment, net us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimateOfTimeToTransfer1 Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimate of Time to Transfer Effective portion reclassified from AOCI into income Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Leasehold improvements Furniture and equipment Amount of pre-tax gain (loss) recognized in OCI Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Derivative Instruments, Gain (Loss) [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Text Block] us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements Derivative assets, carrying value Derivative Asset us-gaap_DerivativeLiabilityFairValueOfCollateral Derivative Liability, Fair Value of Collateral Use of Estimates, Policy [Policy Text Block] us-gaap_HeldToMaturitySecurities Held-to-maturity Securities New Accounting Pronouncements, Policy [Policy Text Block] us-gaap_WeightedAverageInterestRateOfTimeDeposits100000OrMore Time, $100,000 or more us-gaap_WeightedAverageInterestRateOfTimeDeposits100000OrMoreThreeMonthsOrLess Other time Estimated fair value us-gaap_AvailableForSaleSecuritiesDebtSecurities