<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Version>2.4.0.6</Version>
  <ProcessingTime />
  <ReportFormat>Html</ReportFormat>
  <ContextCount>162</ContextCount>
  <ElementCount>283</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>46</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>7</UnitCount>
  <MyReports>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00090 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document And Entity Information</ShortName>
    </Report>
    <Report>
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00100 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/StatementConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00105 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/StatementConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00200 - Statement - Consolidated Statements Of Operations And Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveIncome</Role>
      <ShortName>Consolidated Statements Of Operations And Comprehensive Income</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00205 - Statement - Consolidated Statements Of Operations And Comprehensive Income (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveIncomeParenthetical</Role>
      <ShortName>Consolidated Statements Of Operations And Comprehensive Income (Parenthetical)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00300 - Statement - Consolidated Statements Of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/StatementConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements Of Cash Flows</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>10101 - Disclosure - Organization</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureOrganization</Role>
      <ShortName>Organization</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>10201 - Disclosure - Basis Of Presentation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureBasisOfPresentation</Role>
      <ShortName>Basis Of Presentation</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>10301 - Disclosure - Business Combinations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureBusinessCombinations</Role>
      <ShortName>Business Combinations</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>10401 - Disclosure - Restrictions Of Cash</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureRestrictionsOfCash</Role>
      <ShortName>Restrictions Of Cash</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>10501 - Disclosure - Securities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureSecurities</Role>
      <ShortName>Securities</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>10601 - Disclosure - Loans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureLoans</Role>
      <ShortName>Loans</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>10701 - Disclosure - Goodwill And Other Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureGoodwillAndOtherIntangibleAssets</Role>
      <ShortName>Goodwill And Other Intangible Assets</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>10801 - Disclosure - Deposits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureDeposits</Role>
      <ShortName>Deposits</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>10901 - Disclosure - Derivatives</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureDerivatives</Role>
      <ShortName>Derivatives</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>11001 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>11101 - Disclosure - Earnings Per Common Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureEarningsPerCommonShare</Role>
      <ShortName>Earnings Per Common Share</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>11201 - Disclosure - Senior Non-Cumulative Perpetual Preferred Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureSeniorNonCumulativePerpetualPreferredStock</Role>
      <ShortName>Senior Non-Cumulative Perpetual Preferred Stock</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>11301 - Disclosure - Commitment And Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureCommitmentAndContingencies</Role>
      <ShortName>Commitment And Contingencies</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>11401 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureFairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>11501 - Disclosure - Accounting Pronouncements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureAccountingPronouncements</Role>
      <ShortName>Accounting Pronouncements</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>30301 - Disclosure - Business Combinations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureBusinessCombinationsTables</Role>
      <ShortName>Business Combinations (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>30503 - Disclosure - Securities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureSecuritiesTables</Role>
      <ShortName>Securities (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>30603 - Disclosure - Loans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureLoansTables</Role>
      <ShortName>Loans (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>30703 - Disclosure - Goodwill And Other Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureGoodwillAndOtherIntangibleAssetsTables</Role>
      <ShortName>Goodwill And Other Intangible Assets (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>30803 - Disclosure - Deposits (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureDepositsTables</Role>
      <ShortName>Deposits (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>31103 - Disclosure - Earnings Per Common Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureEarningsPerCommonShareTables</Role>
      <ShortName>Earnings Per Common Share (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>31303 - Disclosure - Commitment And Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureCommitmentAndContingenciesTables</Role>
      <ShortName>Commitment And Contingencies (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>31403 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureFairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>40101 - Disclosure - Organization (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureOrganizationDetails</Role>
      <ShortName>Organization (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>40301 - Disclosure - Business Combinations (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureBusinessCombinationsNarrativeDetails</Role>
      <ShortName>Business Combinations (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>40302 - Disclosure - Business Combinations (Allocation Of The Consideration Received) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureBusinessCombinationsAllocationOfConsiderationReceivedDetails</Role>
      <ShortName>Business Combinations (Allocation Of The Consideration Received) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>40303 - Disclosure - Business Combinations (Schedule Of Purchased Performing And Impaired Loans) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureBusinessCombinationsScheduleOfPurchasedPerformingAndImpairedLoansDetails</Role>
      <ShortName>Business Combinations (Schedule Of Purchased Performing And Impaired Loans) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>40401 - Disclosure - Restrictions Of Cash (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureRestrictionsOfCashDetails</Role>
      <ShortName>Restrictions Of Cash (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>40501 - Disclosure - Securities (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureSecuritiesNarrativeDetails</Role>
      <ShortName>Securities (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>40502 - Disclosure - Securities (Schedule Of Book Value And Fair Value Of Available-For-Sale Securities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureSecuritiesScheduleOfBookValueAndFairValueOfAvailableForSaleSecuritiesDetails</Role>
      <ShortName>Securities (Schedule Of Book Value And Fair Value Of Available-For-Sale Securities) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>40503 - Disclosure - Securities (Schedule Of Fair Values And Related Unrealized Losses In Securities Portfolio) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureSecuritiesScheduleOfFairValuesAndRelatedUnrealizedLossesInSecuritiesPortfolioDetails</Role>
      <ShortName>Securities (Schedule Of Fair Values And Related Unrealized Losses In Securities Portfolio) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>40601 - Disclosure - Loans (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureLoansNarrativeDetails</Role>
      <ShortName>Loans (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>40602 - Disclosure - Loans (Schedule Of Loans Composition, Net Of Capitalized Origination Costs And Unearned Income) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureLoansScheduleOfLoansCompositionNetOfCapitalizedOriginationCostsAndUnearnedIncomeDetails</Role>
      <ShortName>Loans (Schedule Of Loans Composition, Net Of Capitalized Origination Costs And Unearned Income) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>40603 - Disclosure - Loans (Schedule Of Loans By Regulatory Risk Ratings) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureLoansScheduleOfLoansByRegulatoryRiskRatingsDetails</Role>
      <ShortName>Loans (Schedule Of Loans By Regulatory Risk Ratings) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>40604 - Disclosure - Loans (Allowance For Loan And Lease Loss, By Loan Category) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureLoansAllowanceForLoanAndLeaseLossByLoanCategoryDetails</Role>
      <ShortName>Loans (Allowance For Loan And Lease Loss, By Loan Category) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>40605 - Disclosure - Loans (Allowance For Loan And Lease Loss And Individually And Collectively Evaluated For Impairment) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureLoansAllowanceForLoanAndLeaseLossAndIndividuallyAndCollectivelyEvaluatedForImpairmentDetails</Role>
      <ShortName>Loans (Allowance For Loan And Lease Loss And Individually And Collectively Evaluated For Impairment) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>40606 - Disclosure - Loans (Activity In Accretion Of Acquired Loans) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureLoansActivityInAccretionOfAcquiredLoansDetails</Role>
      <ShortName>Loans (Activity In Accretion Of Acquired Loans) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>40607 - Disclosure - Loans (Age Analysis Of Past Due Financing Receivables) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureLoansAgeAnalysisOfPastDueFinancingReceivablesDetails</Role>
      <ShortName>Loans (Age Analysis Of Past Due Financing Receivables) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>40608 - Disclosure - Loans (Schedule Of Nonaccrual Loans And Other Real Estate Owned) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureLoansScheduleOfNonaccrualLoansAndOtherRealEstateOwnedDetails</Role>
      <ShortName>Loans (Schedule Of Nonaccrual Loans And Other Real Estate Owned) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>40701 - Disclosure - Goodwill And Other Intangible Assets (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureGoodwillAndOtherIntangibleAssetsNarrativeDetails</Role>
      <ShortName>Goodwill And Other Intangible Assets (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>40702 - Disclosure - Goodwill And Other Intangible Assets (Schedule Of Goodwill And Other Intangible Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureGoodwillAndOtherIntangibleAssetsScheduleOfGoodwillAndOtherIntangibleAssetsDetails</Role>
      <ShortName>Goodwill And Other Intangible Assets (Schedule Of Goodwill And Other Intangible Assets) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>40801 - Disclosure - Deposits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureDepositsDetails</Role>
      <ShortName>Deposits (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>40901 - Disclosure - Derivatives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureDerivativesDetails</Role>
      <ShortName>Derivatives (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>41001 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureIncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>41101 - Disclosure - Earnings Per Common Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureEarningsPerCommonShareDetails</Role>
      <ShortName>Earnings Per Common Share (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>41201 - Disclosure - Senior Non-Cumulative Perpetual Preferred Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureSeniorNonCumulativePerpetualPreferredStockDetails</Role>
      <ShortName>Senior Non-Cumulative Perpetual Preferred Stock (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>41301 - Disclosure - Commitment And Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureCommitmentAndContingenciesDetails</Role>
      <ShortName>Commitment And Contingencies (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>41401 - Disclosure - Fair Value Measurements (Assets Measured At Fair Value On A Recurring And Nonrecurring Basis) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureFairValueMeasurementsAssetsMeasuredAtFairValueOnRecurringAndNonrecurringBasisDetails</Role>
      <ShortName>Fair Value Measurements (Assets Measured At Fair Value On A Recurring And Nonrecurring Basis) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>41402 - Disclosure - Fair Value Measurements (Carrying Amounts And Approximate Fair Values Of The Company's Financial Assets And Liabilities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.xenithbank.com/role/DisclosureFairValueMeasurementsCarryingAmountsAndApproximateFairValuesOfCompanySFinancialAssetsAndLiabilitiesDetails</Role>
      <ShortName>Fair Value Measurements (Carrying Amounts And Approximate Fair Values Of The Company's Financial Assets And Liabilities) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Info">Element us-gaap_FinancingReceivableModificationsRecordedInvestment had a mix of decimals attribute values: -5 -3.</Log>
    <Log type="Info">Element us-gaap_FiniteLivedCoreDepositsGross had a mix of decimals attribute values: -5 -3.</Log>
    <Log type="Info">Element us-gaap_Goodwill had a mix of decimals attribute values: -5 -3.</Log>
    <Log type="Info">Element us-gaap_ImpairedFinancingReceivableRecordedInvestment had a mix of decimals attribute values: -5 -3.</Log>
    <Log type="Info">Element us-gaap_PreferredStockValue had a mix of decimals attribute values: -5 -3.</Log>
    <Log type="Info">Element xbks_BusinessAcquisitionPurchasePriceAllocationAdjustmentToReflectAssetsAtFairValueLoans had a mix of decimals attribute values: -5 -3.</Log>
    <Log type="Info">'Shares' elements on report '40101 - Disclosure - Organization (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '40101 - Disclosure - Organization (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '40301 - Disclosure - Business Combinations (Narrative) (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '40601 - Disclosure - Loans (Narrative) (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '40901 - Disclosure - Derivatives (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '41001 - Disclosure - Income Taxes (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '41201 - Disclosure - Senior Non-Cumulative Perpetual Preferred Stock (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">Process Flow-Through: 00100 - Statement - Consolidated Balance Sheets</Log>
    <Log type="Info">Process Flow-Through: 00105 - Statement - Consolidated Balance Sheets (Parenthetical)</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Jun. 30, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Sep. 30, 2011'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Jun. 30, 2011'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2010'</Log>
    <Log type="Info">Process Flow-Through: 00200 - Statement - Consolidated Statements Of Operations And Comprehensive Income</Log>
    <Log type="Info">Process Flow-Through: 00205 - Statement - Consolidated Statements Of Operations And Comprehensive Income (Parenthetical)</Log>
    <Log type="Info">Process Flow-Through: 00300 - Statement - Consolidated Statements Of Cash Flows</Log>
  </Logs>
  <InputFiles>
    <File>xbks-20120930.xml</File>
    <File>xbks-20120930.xsd</File>
    <File>xbks-20120930_cal.xml</File>
    <File>xbks-20120930_def.xml</File>
    <File>xbks-20120930_lab.xml</File>
    <File>xbks-20120930_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
