MBIN


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted
dei:LegalEntity
us-gaap:CapitalToRiskWeightedAssets
us-gaap:ConsolidatedEntities

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestExpense
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:InterestIncomeExpenseNet
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:ProfitLoss

us-gaap:Assets
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:Liabilities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:OtherAssets

us-gaap:TimeDepositMaturitiesYearOne

us-gaap:LongTermDebt

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents, us-gaap:SubsidiarySaleOfStock

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividends
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateStatedPercentage

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

mbin:AllowanceForLoanAndLeaseLossRecoveryOfBadDebtsNet
us-gaap:FinancingReceivablePortfolioSegment

mbin:AmortizationOfMortgageServicingRightsAndFairValueAdjustments

mbin:CommonStockExchangeTransactionAndRetiredDuringPeriodShares
us-gaap:StatementEquityComponents
mbin:DeconsolidationOfEntities
us-gaap:BalanceSheetLocation
mbin:DeconsolidationRetainedInvestmentFairValue
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
mbin:DepositarySharesEquivalentPreferredStockInterestPerShare

mbin:Dividends6PercentPreferredStock
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

mbin:Dividends7PercentPreferredStock
us-gaap:StatementEquityComponents

mbin:Dividends8PercentPreferredStock
us-gaap:StatementEquityComponents

mbin:DividendsPayableCashFlow
us-gaap:FairValueByAssetClass
mbin:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetChangesInValuationInputsOrAssumptionsUsedInValuationModel
us-gaap:FairValueByAssetClass
mbin:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOriginatedAndPurchasedServicing
us-gaap:FairValueByAssetClass
mbin:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPaydown
us-gaap:StatementClassOfStock
mbin:FinalDividendForRedemptionOf8PercentPreferredStock
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:StatementEquityComponents

mbin:GainLossOnSaleOfAvailableForSaleInvestmentsAmountRelatedToAociReclassification

mbin:GainLossOnSaleOfSecurities

mbin:IncomeTaxExpenseBenefitRelatedToReclassificationItems
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
mbin:PaymentOfUnderwritingDiscounts
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
mbin:PreferredStockLiquidationPreferenceDepositaryShares

mbin:ServicingFeesAmount
us-gaap:TitleOfIndividual
mbin:ShareBasedCompensationArrangementAwardForAnnualFee
us-gaap:DebtInstrument
mbin:ShortTermDebtMaturityPeriodMaximum

us-gaap:AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:AmortizationOfMortgageServicingRightsMSRs

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CommunicationsAndInformationTechnology

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss

us-gaap:DebtSecuritiesTradingUnrealizedGainLoss

us-gaap:Depreciation

us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeGainOnDerivative
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeLossOnDerivative

us-gaap:DividendsCommonStock
us-gaap:StatementEquityComponents
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByLiabilityClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FeesAndCommissionsMortgageBankingAndServicing

us-gaap:GainLossOnSalesOfLoansNet
us-gaap:TypeOfArrangement
us-gaap:GainLossOnSecuritizationOfFinancialAssets

us-gaap:ImpairedFinancingReceivableAverageRecordedInvestment
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ImpairedFinancingReceivableInterestIncomeCashBasisMethod
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:IncreaseDecreaseInDeposits

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInTradingSecurities

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestAndDividendIncomeOperating
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:InterestExpenseBorrowings

us-gaap:InterestExpenseDeposits

us-gaap:InterestIncomeDebtSecuritiesTradingOperating

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:InterestIncomeFederalHomeLoanBankAdvances

us-gaap:InterestIncomeOther

us-gaap:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:LaborAndRelatedExpense

us-gaap:LoanPortfolioExpense

us-gaap:NoninterestExpense
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:NoninterestIncome
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:NoninterestIncomeOther

us-gaap:OccupancyNet

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherNoninterestExpense

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale

us-gaap:PaymentsForProceedsFromLoansReceivable

us-gaap:PaymentsForProceedsFromOtherInvestingActivities
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:PaymentsForRepurchaseOfRedeemablePreferredStock
us-gaap:StatementClassOfStock
us-gaap:PaymentsOfStockIssuanceCosts
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt
us-gaap:FinancialInstrument, us-gaap:TypeOfArrangement

us-gaap:PaymentsToAcquireFederalHomeLoanBankStock

us-gaap:PaymentsToAcquireLimitedPartnershipInterests

us-gaap:PaymentsToAcquireLoansHeldForInvestment
us-gaap:StatementClassOfStock
us-gaap:PreferredStockDividendRatePercentage
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
us-gaap:StatementClassOfStock
us-gaap:PreferredStockDividendsPerShareDeclared

us-gaap:ProceedsFromIssuanceOfDebt

us-gaap:ProceedsFromIssuanceOfPreferredStockAndPreferenceStock
us-gaap:StatementClassOfStock
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromNotesPayable

us-gaap:ProceedsFromPaymentsForSecuritiesPurchasedUnderAgreementsToResell

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfFederalHomeLoanBankStock

us-gaap:ProceedsFromSaleOfLoansHeldForSale
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:TypeOfArrangement
us-gaap:ProceedsFromSaleOfLoansReceivable

us-gaap:ProfessionalFees

us-gaap:ProvisionForLoanAndLeaseLosses
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ProvisionForLoanLossesExpensed
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:RepaymentsOfDebt
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:SaleOfStockPercentageOfOwnershipBeforeTransaction
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:StockIssuedDuringPeriodValueIssuedForServices

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock
us-gaap:StockRedeemedOrCalledDuringPeriodValue
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:RegulatoryAgency
mbin:AdditionalCapitalConservationBufferRequirementSubsequentYearsRatio

mbin:AvailableForSaleSecuritiesAndSecuritiesPurchasedUnderAgreementsToResellPledgedAsCollateral

mbin:BrokeredCertificateOfDeposits

mbin:BrokeredDemandDepositAccounts

mbin:BrokeredDeposits

mbin:BrokeredDepositsSavingsDeposits

mbin:CashAccountsInExcessOfFederallyInsuredLimits

mbin:CashAccountsInExcessOfFederallyInsuredLimitsWithFederalHomeLoanBankOfChicago

mbin:CashAccountsInExcessOfFederallyInsuredLimitsWithFederalHomeLoanBankOfIndianapolis

mbin:CashAccountsInExcessOfFederallyInsuredLimitsWithFederalReserveBank

mbin:DeconsolidationBorrowings

mbin:DeconsolidationLoansReceivable

mbin:DeconsolidationNetAssets

mbin:DeferredAndCurrentTaxLiabilitiesNet

mbin:DeferredTaxAssetsFairValueAdjustmentsOnAcquisitions

mbin:DeferredTaxLiabilitiesUnrealizedLossesOnAvailableForSaleSecurities
us-gaap:StatementClassOfStock
mbin:DepositarySharesIssuancePricePerShare
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
mbin:FederalReserveDiscountWindowAdvancesFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
mbin:FederalReserveDiscountWindowAndPPPLFAdvancesFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:TypeOfArrangement
mbin:FirstLossPositionInLoanPortfolioMaximumSecuritizationPoolAmount
us-gaap:TypeOfArrangement
mbin:FirstLossPositionInLoanPortfolioMaximumSecuritizationPoolPercentage
us-gaap:TypeOfArrangement
mbin:FirstLossPositionInLoanPortfolioReservesForLosses
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
mbin:ImpairedLoansFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
mbin:ImpairedLoansMeasurementInputMarketabilityDiscountRate
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
mbin:InterestPayableFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
mbin:InterestReceivableFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

mbin:LoansAndLeasesReceivableAmountOutstandingModifiedUnderCaresAct

mbin:MaximumPercentageOfParticipationInterestToBePurchasedInIndividualLoans

mbin:OtherAssetsAndReceivables
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
mbin:OtherBorrowingsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

mbin:OtherReceivablesMarginAmountOnForwardTrades

mbin:ReserveLiabilityForRiskSharingObligation
us-gaap:FinancingReceivablePortfolioSegment
mbin:ResidentialLoansInProcessOfForeclosure
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems
mbin:ShortTermSubordinatedDebt

mbin:TimeDeposits250000OrMore

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestments

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:TypeOfArrangement
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired
dei:LegalEntity
us-gaap:Capital
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:CapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
dei:LegalEntity, us-gaap:Range
us-gaap:CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
us-gaap:ConsolidatedEntities, us-gaap:Range
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:CashAndDueFromBanks
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:CashCollateralForBorrowedSecurities

us-gaap:CashReserveDepositRequiredAndMade

us-gaap:DebtInstrumentUnusedBorrowingCapacityAmount

us-gaap:DebtLongtermAndShorttermCombinedAmount
us-gaap:CounterpartyName, us-gaap:DebtInstrument
us-gaap:DebtInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesInvestments

us-gaap:DeferredTaxLiabilitiesMortgageServicingRights

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DemandDepositAccounts

us-gaap:DepositLiabilitiesCollateralIssuedFinancialInstruments

us-gaap:Deposits
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:DepositsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:DepositsSavingsDeposits
us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:MeasurementInputType
us-gaap:DerivativeAssetMeasurementInput
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByAssetClass
us-gaap:DerivativeAssets
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByAssetClass
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DerivativeLiabilities
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByLiabilityClass
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByLiabilityClass
us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:MeasurementInputType
us-gaap:DerivativeLiabilityMeasurementInput
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNotionalAmount
us-gaap:AwardType, us-gaap:PlanName
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EscrowDeposit
us-gaap:FinancialInstrument
us-gaap:FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
us-gaap:OtherCommitments
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations
us-gaap:FairValueByMeasurementBasis
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
us-gaap:FairValueByAssetClass
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByLiabilityClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:Range, us-gaap:DebtInstrument
us-gaap:FederalHomeLoanBankAdvancesInterestRate
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FederalHomeLoanBankBorrowingsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:FederalHomeLoanBankStock

us-gaap:FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableCollectivelyEvaluatedForImpairment
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableIndividuallyEvaluatedForImpairment
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableRecordedInvestmentCurrent
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableRecordedInvestmentPastDue
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:ImpairedFinancingReceivableRecordedInvestment
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ImpairedFinancingReceivableRelatedAllowance
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ImpairedFinancingReceivableUnpaidPrincipalBalance
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:InterestBearingDepositLiabilities

us-gaap:InterestBearingDepositsInBanks

us-gaap:InterestReceivable
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:InvestmentInFederalHomeLoanBankStockFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

us-gaap:LoansAndLeasesReceivableAllowance
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment, us-gaap:UnusualOrInfrequentItem
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities
us-gaap:InternalCreditAssessment
us-gaap:InternalCreditAssessment, us-gaap:UnusualOrInfrequentItem

us-gaap:LoansAndLeasesReceivableNetReportedAmount
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

us-gaap:LoansHeldForSaleFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementFrequency

us-gaap:LoansPledgedAsCollateral
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:LoansReceivableFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:LoansReceivableHeldForSaleNetNotPartOfDisposalGroup

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
us-gaap:DebtInstrument

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
us-gaap:DebtInstrument

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
us-gaap:DebtInstrument

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
us-gaap:DebtInstrument

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
us-gaap:DebtInstrument

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
us-gaap:DebtInstrument
us-gaap:Ownership
us-gaap:MinorityInterestOwnershipPercentageByParent

us-gaap:NoninterestBearingDepositLiabilities

us-gaap:OperatingLeasesFutureMinimumPaymentsDue

us-gaap:OperatingLeasesFutureMinimumPaymentsDueCurrent

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFiveYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFourYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInThreeYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInTwoYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueThereafter

us-gaap:OtherLiabilities
us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:OtherReceivables

us-gaap:OtherReceivablesNetCurrent
us-gaap:StatementClassOfStock
us-gaap:PreferredStockValue

us-gaap:QualifiedAffordableHousingProjectInvestmentsCommitment

us-gaap:SecuritiesLoanedFairValueOfCollateral
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:SecuritiesPurchasedUnderAgreementsToResell

us-gaap:ServicingAssetAtFairValueAmount
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:TypeOfArrangement
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:MeasurementInputType
us-gaap:ServicingAssetMeasurementInput
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:MeasurementInputType
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:Range, us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:MeasurementInputType
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:MeasurementInputType
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:SharePrice
us-gaap:DebtInstrument
us-gaap:ShortTermBorrowings
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval
dei:LegalEntity
us-gaap:TierOneLeverageCapital
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:TierOneLeverageCapitalRequiredToBeWellCapitalized
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
dei:LegalEntity, us-gaap:Range
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:Range
dei:LegalEntity
us-gaap:TierOneLeverageCapitalToAverageAssets
us-gaap:ConsolidatedEntities

us-gaap:TimeDepositMaturitiesYearFive

us-gaap:TimeDepositMaturitiesYearFour

us-gaap:TimeDepositMaturitiesYearThree

us-gaap:TimeDepositMaturitiesYearTwo

us-gaap:TimeDeposits

us-gaap:TradingSecurities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

Plots across concepts


IncomeStatement
Comprehensive Income Net Of Tax
Expenses
Interest Expense
Balance Sheet
Intangible Assets Net Excluding Goodwill
Assets
Property Plant And Equipment Net
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Intangible Assets Net Excluding Goodwill
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Other Liabilities
Noncurrent Liabilities
Long Term Debt
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
Per Share
Common Stock Dividends Per Share Declared
CashFlow
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInInvestingActivities
Payments For Proceeds From Other Investing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Net
BanksAndOrInsurance
Interest And Dividend Income Operating
AssetsBanks
Cash And Due From Banks
LiabilitiesBanks
Deposits

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
us-gaap:CommonStockValue ███████████████▁136.836136.474135.857136.103135.949135.746135.64135.507135.374135.19135.057135.021134.952134.941134.89128.23NANA50.1525NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁28.87432528.850414NA28.77846228.76234928.759412NA28.74495328.74629728.737439NA28.72782228.72080528.71048NA21.31835952.819807552.8081425NA52.7849025NANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁28.78281328.772092NA28.74561428.74389428.734632NA28.70643828.70531328.70225NA28.69403628.69274928.690876NA21.31019952.78652.786NA52.778NANA
us-gaap:EarningsPerShareBasic ▆██▇▅▃▄▃▃▂▃▃▃▃▃▂▂▁▁▂▁▁1.592.021.951.791.310.730.920.60.510.340.510.550.520.50.730.450.2640.156000000000000030.152000000000000020.204000000000000010.1440.046000000000000006
us-gaap:EarningsPerShareDiluted ▆██▇▅▃▄▃▃▂▃▃▃▃▃▂▂▁▁▂▁▁1.582.021.951.791.310.730.920.60.510.340.510.550.520.50.730.450.2640.156000000000000030.152000000000000020.204000000000000010.1440.046000000000000006
 us-gaap:CapitalToRiskWeightedAssets dei:LegalEntity mbin:JoyStateBankNANA9.800000000000001e-06NANANA1.31e-071.4199999999999997e-071.56e-071.57e-071.86e-071.24e-071.05e-071.1e-07NANANANANANANANA
 us-gaap:CapitalToRiskWeightedAssets dei:LegalEntity mbin:MerchantsBankOfIndianaNANA8.7e-06NANANA1.2e-071.12e-071.16e-071.4599999999999998e-071.33e-071.48e-071.4699999999999998e-071.4699999999999998e-071.57e-071.27e-07NANA1.35e-07NANANA
 us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities srt:ParentCompanyNANA8.599999999999999e-06NANANA1.16e-071.08e-071.0699999999999999e-07NA1.23e-07NANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mbin:BankingSegment█▇▅▂▂▃▂▂▂▁40.98339.5432.76327.62825.68329.2328.00427.96325.98424.492NANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mbin:MortgageWarehousing▅▆▇█▇▅▆▅▃▂▂▂▂▁▁▂▁▁▁▁29.93538.58744.02447.32142.04430.09934.88130.94621.9514.3815.93416.33514.65811.85712.49113.79512.36310.14912.12911.832NANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mbin:MultiFamilyMortgageBanking▄▄▅▅▅█▆▆▆▆▅▄▂▃▃▂▂▁▁▂0.2040.2070.2380.2450.260.420.3280.3350.3340.3310.240.2010.1080.1630.1340.1010.1280.0510.0550.117NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
us-gaap:ComprehensiveIncomeNetOfTax ▇██▇▅▃▄▃▂▁▂▂▂▂▃▁▂▁▁▁51.16461.85859.75354.70140.94425.05129.82720.31116.92511.03416.40916.91215.74914.74319.79410.55314.6919.2688.16811.496NANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▇██▇▅▃▄▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁69.39484.15280.38474.61455.39532.96439.49526.76121.76714.11121.12122.32320.83819.74521.65916.91223.84914.74114.48219.18612.6118.516
us-gaap:IncomeTaxExpenseBenefit ▇█▇▇▅▃▄▃▂▂▂▂▂▂▁▃▄▂▂▃▂▂17.97722.16920.59819.61214.2338.3819.4346.5025.3283.5415.6995.5845.1864.6841.336.4459.0915.6115.7287.5874.9863.367
us-gaap:IncomeTaxesPaidNet █▁▅▄▄▁▂▁▃▁▂▂41.1040.56321.817.8917.5860.0465.4552.49511.3120.0643.9426.948NANA9.8253.726NANA6.881NANANA
us-gaap:InterestAndFeeIncomeLoansAndLeases ▇███▇▅▆▅▄▃▃▃▃▂▂▂▁▁▁▁68.27675.51774.51571.85763.97953.56456.82952.77942.36534.45533.99932.05628.7924.61223.10122.01619.02215.78317.69316.804NANA
us-gaap:InterestExpense ▂▂▂▃▅▆██▆▄▄▄▃▂▂▂▂▁▁▁▁▁8.0317.5868.67410.93616.9722.06426.17827.13720.83915.54315.6514.09511.9178.937.9587.6166.745.4765.5094.8574.364.242
us-gaap:InterestIncomeExpenseNet ▇██▇▆▄▄▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁64.40771.96369.23765.32251.23438.35337.62132.62427.92224.13124.17523.48222.20620.10818.95218.3915.72413.53115.18214.9712.56911.25
us-gaap:InterestPaidNet ▂▂▃▄▆▇█▆▅▄▅▄▃▂▂▂▂▁▁7.656.97211.16613.121.05823.78227.3721.65118.12614.74517.58213.59710.3467.7517.5057.3486.2745.6364.483NANANA
us-gaap:NetIncomeLoss ▇██▇▅▃▄▃▂▂▂▂▂▂▃▂▂▁▁▂▁▁51.41761.98359.78655.00241.16224.58330.06120.25916.43910.5715.42216.73915.65215.06120.32910.46714.7589.138.75411.5997.6255.149
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▆██▇▅▃▄▃▂▂▂▂▂▂▃▂▂▁▁▂▁▁45.75858.22656.16851.38437.54320.96526.44317.23714.6969.73714.5915.90614.8214.22819.4969.63413.9268.2987.92110.8377.4234.944
us-gaap:PreferredStockDividendsIncomeStatementImpact █▆▅▅▅▅▅▅▃▂▂▂▂▂▂▂▂▂▂▂▁▁5.6593.7573.6183.6183.6193.6183.6183.0221.7430.8330.8320.8330.8320.8330.8330.8330.8320.8320.8330.7620.2020.205
us-gaap:ProfitLoss ▇██▇▅▃▄▃▂▁▂▂▂▂▃▁▂▁▁51.41761.98359.78655.00241.16224.58330.06120.25916.43910.5715.42216.73915.65215.06120.32910.46714.7589.138.754NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
us-gaap:Assets █████▆▅▅▄▂▂▂▂▂▂▂▁▁▁▁9881.5329705.269645.3759530.4759439.47908.3986371.9286337.1865287.393976.7253884.1633806.9493786.6823675.8493393.1333237.4853091.52800.6812718.5123075.098NANA
us-gaap:Liabilities █████▆▄▄▃▂▂▁▁▁▁▁8822.4688694.0058834.7548773.348731.2027235.4295718.25707.7474772.3773498.8943462.9263399.6033393.7633296.1363025.6592994.2NANA2512.224NANANA
us-gaap:LiabilitiesAndStockholdersEquity █████▆▄▄▃▂▂▂▂▁▁▁9881.5329705.269645.3759530.4759439.47908.3986371.9286337.1865287.393976.7253884.1633806.9493786.6823675.8493393.1333237.485NANA2718.512NANANA
us-gaap:StockholdersEquity ██▆▅▅▅▅▄▃▃▃▂▂▂▂▁1059.0641011.255810.621757.135708.198672.969653.728629.439515.013477.831421.237407.346392.919379.713367.474243.285NANA206.288NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
us-gaap:CashAndCashEquivalentsAtCarryingValue ▅▃▁▅▅█▇▄▆▃▄▅▄▃▄█▅▆▆▆402.049269.439179.728429.202403.187568.082506.709364.976460.889313.451336.524410.756352.403287.733359.519566.81416.554443.56445.701456.035NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
us-gaap:PropertyPlantAndEquipmentGross NANA34.674NANANA32.345NANANA17.949NANANA8.009NANANA7.366NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType mbin:FurnitureFixturesEquipmentAndSoftwareNANA7.429NANANA6.445NANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:BuildingNANA23.946NANANA22.775NANANA4.095NANANA3.547NANANA3.14NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandNANA3.072NANANA3.072NANANA3.072NANANA2.26NANANA2.26NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovementsNANA0.227NANANA0.053NANANA0.083NANANA0.071NANANA0.071NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA4.913NANANA3.071NANANA2.813NANANA2.655NANANA2.515NANANA
us-gaap:PropertyPlantAndEquipmentNet ███▇▇▇▇▇▇▅▄▃▂▁▁▁31.38431.26129.76129.26129.36229.41529.27429.21126.5821.07815.13610.8468.5846.7055.3545.138NANA4.851NANANA
 us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntitiesNANA823.842NANANA664.878NANANA453.028NANANANANANANANANANANA
us-gaap:Goodwill ▇▇▇▇▇▇▇▇▇██▂▂▂▁▂15.84515.84515.84515.84515.84515.84515.84515.57415.57417.14417.4775.3025.3695.1393.9026.037NANA0.523NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▂▂▃▄▄▅▆▇█▅▆▂▂▂▁1.992.1362.2832.6573.0383.4193.7994.1824.5673.3813.5421.7631.8391.9151.512NANANANANANANA
us-gaap:FiniteLivedIntangibleAssetsNet NANA2.283NANANA3.799NANANA3.542NANANA1.512NANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CoreDepositsNANA1.425NANANA1.826NANANA2.248NANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:LicensingAgreementsNANA0.709NANANA0.905NANANA1.101NANANA1.296NANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:TradeNamesNANA0.149NANANA0.171NANANA0.193NANANA0.216NANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
us-gaap:TimeDepositMaturitiesYearOne NANA239.998NANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
us-gaap:LongTermDebt ▄▃▆▇█▃▂▁▁▂▂▁▂▂▁▁701.373545.161348.2561618.2011761.113444.567181.439159.67362.225338.031195.45367.279189.515199.37856.61256.624NANA57.006NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
us-gaap:StockholdersEquity ██▆▅▅▅▅▄▃▃▃▂▂▂▂▁1059.0641011.255810.621757.135708.198672.969653.728629.439515.013477.831421.237407.346392.919379.713367.474243.285NANA206.288NANANA
us-gaap:CommonStockValue ███████████████▁136.836136.474135.857136.103135.949135.746135.64135.507135.374135.19135.057135.021134.952134.941134.89128.23NANA50.1525NANANA
us-gaap:RetainedEarningsAccumulatedDeficit █▇▆▅▄▄▃▃▃▂▂▂▂▂▁▁560.083516.961461.744407.979358.895323.651304.984280.551265.323252.637244.909232.041217.856204.758192.008173.945NANA145.274NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▅▆▆▇▇█▇▇▇▆▅▂▁▁▃▄-0.0040.2490.3740.4070.7080.9260.4580.6920.640.154-0.31-1.297-1.47-1.567-1.006-0.471NANA-0.628NANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents mbin:PreferredStockSeriesC6Percent,us-gaap:PreferredStock▁█0.001144.925NANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents,us-gaap:SubsidiarySaleOfStock mbin:PreferredStockSeriesC6Percent,us-gaap:PreferredStock,us-gaap:PrivatePlacement46.158NANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▆▆█▁▂▇▃▁▅▆▅▆▅▄▆▅▅▆-25.178295.793333.338762.704-1099.315-871.615408.004-681.64-986.1062.73998.81227.215201.326-123.763-207.555215.242-95.488-88.085273.634NANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities █▆▂▁▃▃▅▄▆▇▆█▅▆▆▆▆██29.034-194.714-637.866-763.878-562.132-568.352-258.795-445.628-149.701-103.551-131.73429.881-238.017-169.196-145.8-193.032-201.73317.42874.263NANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▂▃▂██▂▆▇▃▂▂▃▃▃▃▃▃▁128.754-11.36855.05427.1891496.5521501.34-7.4761031.3551283.24577.739-41.311.257101.361221.173146.064128.046270.21568.516-358.231NANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect █▇▁▆▂▆█▄█▅▄▆132.6189.711-249.47426.015-164.89561.373141.733-95.913147.438-23.073-74.23258.353NANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ██▆█▅▄▄▄▃▅▁▆▆▆▅▆▇▇▇0.4970.409-0.2650.281-0.849-1.379-1.481-1.536-1.915-0.798-2.942-0.37-0.371-0.309-0.769-0.671-0.047-0.003-0.144NANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▆▆█▁▂▇▃▁▅▆▅▆▅▄▆▅▅▆-25.178295.793333.338762.704-1099.315-871.615408.004-681.64-986.1062.73998.81227.215201.326-123.763-207.555215.242-95.488-88.085273.634NANANA
us-gaap:NetIncomeLoss ▇██▇▅▃▄▃▂▂▂▂▂▂▃▂▂▁▁▂▁▁51.41761.98359.78655.00241.16224.58330.06120.25916.43910.5715.42216.73915.65215.06120.32910.46714.7589.138.75411.5997.6255.149
us-gaap:ProfitLoss ▇██▇▅▃▄▃▂▁▂▂▂▂▃▁▂▁▁51.41761.98359.78655.00241.16224.58330.06120.25916.43910.5715.42216.73915.65215.06120.32910.46714.7589.138.754NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities █▆▂▁▃▃▅▄▆▇▆█▅▆▆▆▆██29.034-194.714-637.866-763.878-562.132-568.352-258.795-445.628-149.701-103.551-131.73429.881-238.017-169.196-145.8-193.032-201.73317.42874.263NANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▄▄▁▂▂▃▄█▆▆▄▄▂▁▂▁▁▁0.6822.0042.1930.3940.4420.5941.712.6255.4424.2063.7552.3951.991.0550.0340.5360.1960.0220.026NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▂▃▂██▂▆▇▃▂▂▃▃▃▃▃▃▁128.754-11.36855.05427.1891496.5521501.34-7.4761031.3551283.24577.739-41.311.257101.361221.173146.064128.046270.21568.516-358.231NANANA
us-gaap:PaymentsOfDividends █▆▆▆▆▆▅█▁▃▃▃▃▃▃▃▃▃▃8.3896.2085.9195.9185.9185.9165.6288.7840.02.8422.5542.5542.5542.5542.2661.9081.8891.8871.888NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType mbin:FederalReserveDiscountWindowBorrowings,mbin:LoansInAccordanceWithCRESActNANANA3.5e-07NANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType mbin:PaycheckProtectionProgramLiquidityFacility,mbin:LoansInAccordanceWithCRESActNANA3.5e-07NANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1361361351361351351351351351351351351341341342850
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.41.41.41.41.72.12.12.63.43.53.53.63.74.00.91.8

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value282828282828282828282821525252
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value282828282828282828282821525252
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1.592.021.951.791.310.730.920.60.510.340.510.550.520.50.730.450.2640.1560.1520.2040.1440.046
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1.582.021.951.791.310.730.920.60.510.340.510.550.520.50.730.450.2640.1560.1520.2040.1440.046
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Capital To Risk Weighted Assets

us-gaap:CapitalToRiskWeightedAssets dei:LegalEntity

us-gaap:CapitalToRiskWeightedAssets

mbin:JoyStateBank


Capital
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9.80.1310.1420.1560.1570.1860.1240.1050.11
Percentage of CapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:MerchantsBankOfIndiana


Capital
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value8.70.120.1120.1160.1460.1330.1480.1470.1470.1570.1270.135
Percentage of CapitalToRiskWeightedAssets88.891.678.974.493.071.5119.4140.0133.60.00.00.0

us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

srt:ParentCompany


Capital
Period End2020-12-312019-12-312019-09-302019-06-302018-12-31
Value8.60.1160.1080.1070.123
Percentage of CapitalToRiskWeightedAssets87.888.576.168.666.1

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value51615954402529201611161615141910149.2688.16811
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating70.677.876.771.760.041.546.834.034.727.841.245.046.250.873.640.665.448.839.558.0

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value6984807455323926211421222019211623141419128.516
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating95.8105.8103.297.881.254.661.944.844.635.653.059.461.168.080.565.0106.277.670.096.874.555.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems

mbin:CorporateReconcilingItemsAndEliminations


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-3.667-2.92-4.342-2.959-2.728-1.663-1.109-1.361-1.171-1.826-1.71-1.2-1.52-1.594-2.003-1.467-1.114-0.961-0.948-0.98
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest-5.3-3.5-5.4-4.0-4.9-5.0-2.8-5.1-5.4-12.9-8.1-5.4-7.3-8.1-9.2-8.7-4.7-6.5-6.5-5.1
Percentage of InterestAndDividendIncomeOperating-5.1-3.7-5.6-3.9-4.0-2.8-1.7-2.3-2.4-4.6-4.3-3.2-4.5-5.5-7.4-5.6-5.0-5.1-4.6-4.9
Percentage of InterestAndDividendIncomeOperating mbin:CorporateReconcilingItemsAndEliminations-278.6-240.30.0-278.1-1257.1-249.00.0-263.2-237.5-387.70.0-171.4-462.0-601.50.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mbin:BankingSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2930222315108.6849.8721111
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest42.036.727.431.428.632.222.036.951.283.3
Percentage of InterestAndDividendIncomeOperating40.338.928.330.723.217.513.616.522.829.6
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:BankingSegment71.178.20.084.861.736.30.035.342.848.0

us-gaap:OperatingSegments, mbin:MortgageWarehousing


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value28394345371617148.3795.1356.6767.67.466.1367.248.967.4726.1278.2478.022
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest41.446.554.260.867.150.345.453.238.536.431.634.035.831.133.453.031.341.656.941.8
Percentage of InterestAndDividendIncomeOperating39.749.255.959.554.527.528.123.817.212.916.820.221.921.126.934.533.332.239.940.5
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:MortgageWarehousing96.0101.50.095.988.455.10.046.038.235.70.046.550.951.80.065.060.460.40.067.8

us-gaap:OperatingSegments, mbin:MultiFamilyMortgageBanking


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1516198.7615.1177.436134.0063.425-0.9556.8126.7296.5057.292104.024125.6793.1187.625
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest21.820.223.811.79.222.635.415.015.7-6.832.330.131.236.950.523.852.738.521.539.7
Percentage of InterestAndDividendIncomeOperating20.921.424.611.57.512.321.96.77.0-2.417.117.919.125.140.715.556.029.915.138.5
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:MultiFamilyMortgageBanking7426.58211.10.03575.91968.11770.50.01195.81025.4-288.50.03347.86023.14473.60.03984.29825.011135.30.06517.1

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value17222019148.3819.4346.5025.3283.5415.6995.5845.1864.6841.336.4459.0915.6115.7287.5874.9863.367
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating24.827.926.425.720.913.914.810.910.98.914.314.915.216.14.924.840.529.527.738.329.521.7

us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidationItems

mbin:CorporateReconcilingItemsAndEliminations


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.924-0.734-1.121-0.791-0.715-0.46-0.235-0.306-0.365-0.507-0.789-0.321-0.148-0.561-0.567-0.559-0.425-0.366-0.374-0.389
Percentage of IncomeTaxExpenseBenefit-5.1-3.3-5.4-4.0-5.0-5.5-2.5-4.7-6.9-14.3-13.8-5.7-2.9-12.0-42.6-8.7-4.7-6.5-6.5-5.1
Percentage of InterestAndDividendIncomeOperating-1.3-0.9-1.4-1.0-1.0-0.8-0.4-0.5-0.7-1.3-2.0-0.9-0.4-1.9-2.1-2.1-1.9-1.9-1.8-2.0
Percentage of InterestAndDividendIncomeOperating mbin:CorporateReconcilingItemsAndEliminations-70.2-60.40.0-74.3-329.5-68.90.0-59.2-74.0-107.60.0-45.9-45.0-211.70.00.00.00.00.00.0

us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mbin:BankingSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value7.4187.8825.6325.9424.0312.651.6562.2232.7262.988
Percentage of IncomeTaxExpenseBenefit41.335.627.330.328.331.617.634.251.284.4
Percentage of InterestAndDividendIncomeOperating10.29.97.27.85.94.42.63.75.67.5
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:BankingSegment18.119.90.021.515.79.10.07.910.512.2

us-gaap:OperatingSegments, mbin:MortgageWarehousing


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value7.3049.98511119.4514.1544.2523.322.0591.3031.7341.9461.6861.5062.9633.4142.8492.3323.2623.173
Percentage of IncomeTaxExpenseBenefit40.645.054.259.166.449.645.151.138.636.830.434.832.532.2222.853.031.341.656.941.8
Percentage of InterestAndDividendIncomeOperating10.112.614.315.213.96.96.75.64.23.34.45.24.95.211.013.112.712.315.816.0
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:MortgageWarehousing24.425.90.024.522.513.80.010.79.49.10.011.911.512.70.024.723.023.00.026.8

us-gaap:OperatingSegments, mbin:MultiFamilyMortgageBanking


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value4.1795.0364.9222.871.4662.0373.7611.2650.908-0.2432.1141.8661.741.808-3.9321.5344.7932.1621.2333.015
Percentage of IncomeTaxExpenseBenefit23.222.723.914.610.324.339.919.517.0-6.937.133.433.638.6-295.623.852.738.521.539.7
Percentage of InterestAndDividendIncomeOperating5.86.36.33.82.13.45.92.11.9-0.65.35.05.16.2-14.65.921.311.46.015.2
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:MultiFamilyMortgageBanking2048.52432.90.01171.4563.8485.00.0377.6271.9-73.40.0928.41611.11109.20.01518.83744.54239.20.02576.9

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302016-12-31
Value410.5632117170.0465.4552.495110.0643.9426.9489.8253.7266.881
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating56.70.728.023.525.80.18.64.223.20.29.918.536.514.333.3

Interest And Fee Income Loans And Leases

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestAndFeeIncomeLoansAndLeases


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value6875747163535652423433322824232219151716
Percentage of InterestAndFeeIncomeLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating94.394.995.694.293.888.789.188.386.986.885.485.384.484.885.884.784.783.085.584.8

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value8.0317.5868.674101622262720151514118.937.9587.6166.745.4765.5094.8574.364.242
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating11.19.511.114.324.936.541.045.442.739.239.337.534.930.829.629.330.028.826.624.525.827.4

us-gaap:InterestExpense us-gaap:ConsolidationItems

mbin:CorporateReconcilingItemsAndEliminations


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.784-0.577-0.66-0.749-1.193-1.828-2.173-1.758-1.965-0.968-0.98-1.029-0.816-0.46-0.386-0.143-0.121-0.0860.140.318
Percentage of InterestExpense-9.8-7.6-7.6-6.8-7.0-8.3-8.3-6.5-9.4-6.2-6.3-7.3-6.8-5.2-4.9-1.9-1.8-1.62.56.5
Percentage of InterestAndDividendIncomeOperating-1.1-0.7-0.8-1.0-1.7-3.0-3.4-2.9-4.0-2.4-2.5-2.7-2.4-1.6-1.4-0.5-0.5-0.50.71.6
Percentage of InterestAndDividendIncomeOperating mbin:CorporateReconcilingItemsAndEliminations-59.6-47.50.0-70.4-549.8-273.70.0-340.0-398.6-205.50.0-147.0-248.0-173.60.00.00.00.00.00.0

us-gaap:InterestExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mbin:BankingSegment


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value7.2166.4396.4267.13910111212118.982
Percentage of InterestExpense89.984.974.165.361.153.548.746.953.857.8
Percentage of InterestAndDividendIncomeOperating10.08.18.29.415.219.520.021.323.022.6
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:BankingSegment17.616.30.025.840.440.40.045.643.136.7

us-gaap:OperatingSegments, mbin:MortgageWarehousing


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1.5991.7242.9084.5467.786121516117.5297.877.2895.4133.7973.9353.6573.4682.6133.2992.719
Percentage of InterestExpense19.922.733.541.645.954.859.659.555.648.450.351.745.442.549.448.051.547.759.956.0
Percentage of InterestAndDividendIncomeOperating2.22.23.76.011.420.024.527.023.819.019.819.415.913.114.614.115.413.715.913.7
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:MortgageWarehousing5.34.50.09.618.540.20.052.252.852.40.044.636.932.00.026.528.125.70.023.0

Interest Income Expense Net

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value64716965513837322724242322201818151315141211
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating88.990.588.985.775.163.559.054.657.360.860.762.565.169.270.470.770.071.273.475.574.272.6

us-gaap:InterestIncomeExpenseNet us-gaap:ConsolidationItems

mbin:CorporateReconcilingItemsAndEliminations


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2.11.7921.5461.8131.412.4962.7592.2752.4581.4391.4211.7291.1450.7251.1070.1430.1210.086-0.14-0.318
Percentage of InterestIncomeExpenseNet3.32.52.22.82.86.57.37.08.86.05.97.45.23.65.80.80.80.6-0.9-2.1
Percentage of InterestAndDividendIncomeOperating2.92.32.02.42.14.14.33.85.03.63.64.63.42.54.10.50.50.5-0.7-1.6
Percentage of InterestAndDividendIncomeOperating mbin:CorporateReconcilingItemsAndEliminations159.6147.50.0170.4649.8373.70.0440.0498.6305.50.0247.0348.0273.60.00.00.00.00.00.0

us-gaap:InterestIncomeExpenseNet us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mbin:BankingSegment


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value33332620151715151415
Percentage of InterestIncomeExpenseNet52.446.038.031.429.945.440.546.752.964.3
Percentage of InterestAndDividendIncomeOperating46.641.633.826.922.428.823.925.530.339.1
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:BankingSegment82.483.70.074.259.659.60.054.456.963.3

us-gaap:OperatingSegments, mbin:MortgageWarehousing


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2836414234181914106.8518.0649.0469.2458.068.556108.8957.5368.839.113
Percentage of InterestIncomeExpenseNet44.051.259.465.566.947.051.345.337.128.433.438.541.640.145.155.156.655.758.260.9
Percentage of InterestAndDividendIncomeOperating39.146.352.856.150.229.830.224.721.217.320.224.127.127.831.839.039.639.642.746.0
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:MortgageWarehousing94.795.50.090.481.559.80.047.847.247.60.055.463.168.00.073.571.974.30.077.0

us-gaap:OperatingSegments, mbin:MultiFamilyMortgageBanking


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.2040.2070.2380.2450.260.420.3280.3350.3340.3310.240.2010.1080.1630.1340.1010.1280.0510.0550.117
Percentage of InterestIncomeExpenseNet0.30.30.30.40.51.10.91.01.21.41.00.90.50.80.70.50.80.40.40.8
Percentage of InterestAndDividendIncomeOperating0.30.30.30.30.40.70.50.60.70.80.60.50.30.60.50.40.60.30.30.6
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:MultiFamilyMortgageBanking100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value7.656.97211132123272118141713107.7517.5057.3486.2745.6364.483
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating10.68.814.317.230.939.442.936.237.237.244.136.230.326.727.928.327.929.721.7

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value51615955412430201610151615152010149.138.754117.6255.149
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating71.077.976.772.160.440.747.133.933.726.638.744.545.951.975.540.265.748.042.358.545.033.2

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems

mbin:CorporateReconcilingItemsAndEliminations


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-2.743-2.186-3.221-2.168-2.013-1.203-0.874-1.055-0.806-1.319-0.921-0.879-1.372-1.033-1.436-0.908-0.689-0.595-0.574-0.591
Percentage of NetIncomeLoss-5.3-3.5-5.4-3.9-4.9-4.9-2.9-5.2-4.9-12.5-6.0-5.3-8.8-6.9-7.1-8.7-4.7-6.5-6.6-5.1
Percentage of InterestAndDividendIncomeOperating-3.8-2.7-4.1-2.8-3.0-2.0-1.4-1.8-1.7-3.3-2.3-2.3-4.0-3.6-5.3-3.5-3.1-3.1-2.8-3.0
Percentage of InterestAndDividendIncomeOperating mbin:CorporateReconcilingItemsAndEliminations-208.4-179.90.0-203.8-927.6-180.10.0-204.1-163.5-280.00.0-125.6-417.0-389.80.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mbin:BankingSegment


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value21231617117.957.0287.6498.4088.769
Percentage of NetIncomeLoss42.337.127.431.828.732.323.437.851.183.0
Percentage of InterestAndDividendIncomeOperating30.028.921.022.917.313.211.012.817.222.1
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:BankingSegment53.058.20.063.346.027.20.027.432.435.8

us-gaap:OperatingSegments, mbin:MortgageWarehousing


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value21293233271213106.323.8324.9425.6545.7744.634.2775.5464.6233.7954.9854.849
Percentage of NetIncomeLoss41.747.154.261.467.350.645.553.938.436.332.033.836.930.721.053.031.341.656.941.8
Percentage of InterestAndDividendIncomeOperating29.636.741.644.340.620.621.518.313.09.712.415.016.915.915.921.320.620.024.124.5
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:MortgageWarehousing71.675.60.071.465.941.30.035.328.826.60.034.639.439.00.040.237.437.40.041.0

us-gaap:OperatingSegments, mbin:MultiFamilyMortgageBanking


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1011145.8913.6515.399102.7412.517-0.7124.6984.8634.7655.484142.497.7833.5171.8854.61
Percentage of NetIncomeLoss21.319.323.810.78.922.034.013.515.3-6.730.529.130.436.473.223.852.738.521.539.7
Percentage of InterestAndDividendIncomeOperating15.115.018.37.75.48.916.04.65.2-1.811.812.914.018.955.39.634.618.59.123.3
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:MultiFamilyMortgageBanking5377.95778.30.02404.51404.21285.50.0818.2753.6-215.10.02419.44412.03364.40.02465.36080.56896.10.03940.2

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value51615541242016101516151520
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating71.077.972.160.440.733.933.726.638.744.545.951.975.5
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value4558565137202617149.73714151414199.634138.2987.921107.4234.944
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating63.273.272.167.455.034.741.428.830.124.536.642.343.449.072.437.062.043.738.354.743.831.9

Preferred Stock Dividends Income Statement Impact

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:PreferredStockDividendsIncomeStatementImpact


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value5.6593.7573.6183.6183.6193.6183.6183.0221.7430.8330.8320.8330.8320.8330.8330.8330.8320.8320.8330.7620.2020.205
Percentage of PreferredStockDividendsIncomeStatementImpact100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating7.84.74.64.75.36.05.75.13.62.12.12.22.42.93.13.23.74.44.03.81.21.3

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value51615955412430201610151615152010149.138.754
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating71.077.976.772.160.440.747.133.933.726.638.744.545.951.975.540.265.748.042.3

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value988197059645953094397908637163375287397638843806378636753393323730912800271830752269
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:ParentCompany, srt:ReportableLegalEntities


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-31
Value826667457
Percentage of Assets8.610.511.8
Percentage of Assets8.610.511.8
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

mbin:CorporateReconcilingItemsAndEliminations


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value499042444241394248373020192116-54.505131013-20.4784.121
Percentage of Assets0.50.90.40.50.50.50.60.70.91.00.80.50.50.60.5-1.70.40.40.5-0.70.2
Percentage of Assets0.50.90.40.50.50.50.60.70.91.00.80.50.50.60.5-1.70.40.40.5-0.70.2
Percentage of Assets mbin:CorporateReconcilingItemsAndEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mbin:BankingSegment


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value532850104498411136393323301825962412222322561889
Percentage of Assets53.951.646.643.138.642.047.441.045.655.958.155.7
Percentage of Assets53.951.646.643.138.642.047.441.045.655.958.155.7
Percentage of Assets us-gaap:OperatingSegments mbin:BankingSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mbin:MortgageWarehousing


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value42654383489351795575436231243529266115541430162415501603135211921288104810601368924
Percentage of Assets43.245.250.754.359.155.249.055.750.339.136.842.740.943.639.936.841.737.439.044.540.7
Percentage of Assets43.245.250.754.359.155.249.055.750.339.136.842.740.943.639.936.841.737.439.044.540.7
Percentage of Assets us-gaap:OperatingSegments mbin:MortgageWarehousing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mbin:MultiFamilyMortgageBanking


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value2382192101941821801881691641601661521461411341351171049810087
Percentage of Assets2.42.32.22.01.92.33.02.73.14.04.34.03.93.94.04.23.83.73.63.33.8
Percentage of Assets2.42.32.22.01.92.33.02.73.14.04.34.03.93.94.04.23.83.73.63.33.8
Percentage of Assets us-gaap:OperatingSegments mbin:MultiFamilyMortgageBanking100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value88228694883487738731723557185707477234983462339933933296302529942512
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets89.389.691.692.192.591.589.790.190.388.089.289.389.689.789.292.592.4

us-gaap:Liabilities us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:ParentCompany, srt:ReportableLegalEntities


Liabilitiesus-gaap:
Period End2020-12-312019-12-312018-12-31
Value151336
Percentage of Liabilities0.20.21.0
Percentage of Assets0.20.20.9
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities1.92.17.9

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value98819705964595309439790863716337528739763884380637863675339332372718
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:ParentCompany, srt:ReportableLegalEntities


Liabilities
Period End2020-12-312019-12-312018-12-31
Value826667457
Percentage of LiabilitiesAndStockholdersEquity8.610.511.8
Percentage of Assets8.610.511.8
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value10591011810757708672653629515477421407392379367243206148110
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.710.48.47.97.58.510.39.99.712.010.810.710.410.310.87.57.66.50.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:ParentCompany, srt:ReportableLegalEntities


Stockholders
Period End2020-12-312019-12-312018-12-31
Value810653421
Percentage of StockholdersEquity100.0100.0100.0
Percentage of Assets8.410.310.8
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities98.197.992.1

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

mbin:PreferredStock6, us-gaap:PreferredStock


Stockholders
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value120120120120120120
Percentage of StockholdersEquity14.916.017.118.018.519.2
Percentage of Assets1.31.31.31.51.91.9
Percentage of Assets mbin:PreferredStock6 us-gaap:PreferredStock0.00.00.00.00.00.0

mbin:PreferredStock7, us-gaap:PreferredStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value50505050505050507248
Percentage of StockholdersEquity4.75.06.26.67.17.57.78.014.010.1
Percentage of Assets0.50.50.50.50.50.60.80.81.41.2
Percentage of Assets mbin:PreferredStock7 us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.0

mbin:PreferredStockSeriesC6Percent, us-gaap:PreferredStock


Stockholders
Period End2021-06-302021-03-31
Value191144
Percentage of StockholdersEquity18.014.3
Percentage of Assets1.91.5
Percentage of Assets mbin:PreferredStockSeriesC6Percent us-gaap:PreferredStock0.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value-0.0040.2490.3740.4070.7080.9260.4580.6920.640.154-0.31-1.297-1.47-1.567-1.006-0.471-0.628-0.232-0.193
Percentage of StockholdersEquity-0.00.00.00.10.10.10.10.10.10.0-0.1-0.3-0.4-0.4-0.3-0.2-0.3-0.2-0.2
Percentage of Assets-0.00.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value13613613513613513513513513513513513513413413428202016
Percentage of StockholdersEquity12.913.516.818.019.220.220.721.526.328.332.133.134.335.536.711.69.713.514.6
Percentage of Assets1.41.41.41.41.41.72.12.12.63.43.53.53.63.74.00.90.70.90.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value56051646140735832330428026525224423221720419217314511894
Percentage of StockholdersEquity52.951.157.053.950.748.146.744.651.552.958.157.055.453.952.371.570.479.985.5
Percentage of Assets5.75.34.84.33.84.14.84.45.06.46.36.15.85.65.75.45.35.20.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-31
Value402269179429403568506364460313336410352287359566416443445456446229
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.12.81.94.54.37.28.05.88.77.98.710.89.37.810.617.513.515.816.414.819.70.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:ParentCompany, srt:ReportableLegalEntities


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2.1170.4632.2247.2730.158
Percentage of CashAndCashEquivalentsAtCarryingValue1.20.10.72.00.0
Percentage of Assets0.00.00.10.20.0
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities0.30.10.50.00.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3432178.0097.366
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0
Percentage of Assets0.40.50.50.20.3

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

mbin:FurnitureFixturesEquipmentAndSoftware


Property
Period End2020-12-312019-12-31
Value7.4296.445
Percentage of PropertyPlantAndEquipmentGross21.419.9
Percentage of Assets0.10.1
Percentage of Assets mbin:FurnitureFixturesEquipmentAndSoftware0.00.0

us-gaap:Building


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value23224.0953.5473.14
Percentage of PropertyPlantAndEquipmentGross69.170.422.844.342.6
Percentage of Assets0.20.40.10.10.1
Percentage of Assets us-gaap:Building0.00.00.00.00.0

us-gaap:Land


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3.0723.0723.0722.262.26
Percentage of PropertyPlantAndEquipmentGross8.99.517.128.230.7
Percentage of Assets0.00.00.10.10.1
Percentage of Assets us-gaap:Land0.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.2270.0530.0830.0710.071
Percentage of PropertyPlantAndEquipmentGross0.70.20.50.91.0
Percentage of Assets0.00.00.00.00.0
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4913000.03071000.02813000.02655000.02515000.0
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0
Percentage of Assets0.10.00.10.10.1

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value3131292929292929262115108.5846.7055.3545.1384.851
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.30.30.30.40.50.50.50.50.40.30.20.20.20.20.2

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

srt:ParentCompany, srt:ReportableLegalEntities


Investments
Period End2020-12-312019-12-312018-12-31
Value823664453
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0
Percentage of Assets8.510.411.7
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities99.799.699.1

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value15151515151515151517175.3025.3695.1393.9026.0370.5230.5230.523
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.20.20.20.30.40.40.10.10.10.10.20.00.00.0

us-gaap:Goodwill us-gaap:StatementBusinessSegments

mbin:BankingSegment


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value8.3538.3538.6860.5230.523
Percentage of Goodwill52.752.749.713.4100.0
Percentage of Assets0.10.10.20.00.0
Percentage of Assets mbin:BankingSegment0.00.00.00.00.0

mbin:MortgageWarehousing


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-31
Value3.7013.7015.0
Percentage of Goodwill23.423.428.6
Percentage of Assets0.00.10.1
Percentage of Assets mbin:MortgageWarehousing0.00.00.0

mbin:MultiFamilyMortgageBanking


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value3.7913.7913.7913.379
Percentage of Goodwill23.923.921.786.6
Percentage of Assets0.00.10.10.1
Percentage of Assets mbin:MultiFamilyMortgageBanking0.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1990000.02136000.02283000.02657000.03038000.03419000.03799000.04182000.04567000.03381000.03542000.01763000.01839000.01915000.01512000.0
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.10.10.10.10.10.00.00.10.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2020-12-312019-12-312018-12-312017-12-31
Value2283000.03799000.03542000.01512000.0
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0
Percentage of Assets0.00.10.10.0

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CoreDeposits


Finite
Period End2020-12-312019-12-312018-12-31
Value1425000.01826000.02248000.0
Percentage of FiniteLivedIntangibleAssetsNet62.448.163.5
Percentage of Assets0.00.00.1
Percentage of Assets us-gaap:CoreDeposits0.00.00.0

us-gaap:LicensingAgreements


Finite
Period End2020-12-312019-12-312018-12-312017-12-31
Value709000.0905000.01101000.01296000.0
Percentage of FiniteLivedIntangibleAssetsNet31.123.831.185.7
Percentage of Assets0.00.00.00.0
Percentage of Assets us-gaap:LicensingAgreements0.00.00.00.0

us-gaap:TradeNames


Finite
Period End2020-12-312019-12-312018-12-312017-12-31
Value149000.0171000.0193000.0216000.0
Percentage of FiniteLivedIntangibleAssetsNet6.54.55.414.3
Percentage of Assets0.00.00.00.0
Percentage of Assets us-gaap:TradeNames0.00.00.00.0

Other Assets

us-gaap:OtherAssets us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

us-gaap:OtherAssets

srt:ParentCompany, srt:ReportableLegalEntities


Other
Period End2020-12-312019-12-312018-12-31
Value190000.02213000.02104000.0
Percentage of OtherAssets100.0100.0100.0
Percentage of Assets0.00.00.1
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities0.00.30.5

Time Deposit Maturities Year One

us-gaap:TimeDepositMaturitiesYearOne

us-gaap:TimeDepositMaturitiesYearOne


Time
Period End2020-12-31
Value239
Percentage of TimeDepositMaturitiesYearOne100.0
Percentage of Assets2.5

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value7015451348161817614441811596233819567189199565657
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.15.614.017.018.75.62.82.51.28.55.01.85.05.41.71.72.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value10591011810757708672653629515477421407392379367243206148110
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.710.48.47.97.58.510.39.99.712.010.810.710.410.310.87.57.66.50.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:ParentCompany, srt:ReportableLegalEntities


Stockholders
Period End2020-12-312019-12-312018-12-31
Value810653421
Percentage of StockholdersEquity100.0100.0100.0
Percentage of Assets8.410.310.8
Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities98.197.992.1

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

mbin:PreferredStock6, us-gaap:PreferredStock


Stockholders
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value120120120120120120
Percentage of StockholdersEquity14.916.017.118.018.519.2
Percentage of Assets1.31.31.31.51.91.9
Percentage of Assets mbin:PreferredStock6 us-gaap:PreferredStock0.00.00.00.00.00.0

mbin:PreferredStock7, us-gaap:PreferredStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value50505050505050507248
Percentage of StockholdersEquity4.75.06.26.67.17.57.78.014.010.1
Percentage of Assets0.50.50.50.50.50.60.80.81.41.2
Percentage of Assets mbin:PreferredStock7 us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.0

mbin:PreferredStockSeriesC6Percent, us-gaap:PreferredStock


Stockholders
Period End2021-06-302021-03-31
Value191144
Percentage of StockholdersEquity18.014.3
Percentage of Assets1.91.5
Percentage of Assets mbin:PreferredStockSeriesC6Percent us-gaap:PreferredStock0.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value-0.0040.2490.3740.4070.7080.9260.4580.6920.640.154-0.31-1.297-1.47-1.567-1.006-0.471-0.628-0.232-0.193
Percentage of StockholdersEquity-0.00.00.00.10.10.10.10.10.10.0-0.1-0.3-0.4-0.4-0.3-0.2-0.3-0.2-0.2
Percentage of Assets-0.00.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value13613613513613513513513513513513513513413413428202016
Percentage of StockholdersEquity12.913.516.818.019.220.220.721.526.328.332.133.134.335.536.711.69.713.514.6
Percentage of Assets1.41.41.41.41.41.72.12.12.63.43.53.53.63.74.00.90.70.90.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value56051646140735832330428026525224423221720419217314511894
Percentage of StockholdersEquity52.951.157.053.950.748.146.744.651.552.958.157.055.453.952.371.570.479.985.5
Percentage of Assets5.75.34.84.33.84.14.84.45.06.46.36.15.85.65.75.45.35.20.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1361361351361351351351351351351351351341341342850
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.41.41.41.41.72.12.12.63.43.53.53.63.74.00.91.8

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value560516461407358323304280265252244232217204192173145
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.75.34.84.33.84.14.84.45.06.46.36.15.85.65.75.45.3

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value-4000.0249000.0374000.0407000.0708000.0926000.0458000.0692000.0640000.0154000.0-310000.0-1297000.0-1470000.0-1567000.0-1006000.0-471000.0-628000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.00.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueNewIssues

mbin:PreferredStockSeriesC6Percent, us-gaap:PreferredStock


Stock
Period End2021-06-302021-03-31
Value0.001144
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0
Percentage of Assets0.00.0
Percentage of Assets mbin:PreferredStockSeriesC6Percent us-gaap:PreferredStock0.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents, us-gaap:SubsidiarySaleOfStock

mbin:PreferredStockSeriesC6Percent, us-gaap:PreferredStock, us-gaap:PrivatePlacement


Stock
Period End2021-06-30
Value46
Percentage of StockIssuedDuringPeriodValueNewIssues4615800.0
Percentage of Assets0.0
Percentage of Assets mbin:PreferredStockSeriesC6Percent us-gaap:PreferredStock us-gaap:PrivatePlacement0.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value-25.178295333762-1099.315-871.615408-681.64-986.1062.7399827201-123.763-207.555215-95.488-88.085273
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-34.8371.8427.81000.2-1611.8-1442.7639.5-1140.6-2022.36.9248.172.4590.0-426.2-771.3827.7-425.1-463.41322.5

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value29-194.714-637.866-763.878-562.132-568.352-258.795-445.628-149.701-103.551-131.73429-238.017-169.196-145.8-193.032-201.7331774
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating40.1-244.8-818.7-1001.7-824.2-940.7-405.6-745.7-307.0-261.0-330.879.5-697.5-582.7-541.8-742.3-898.091.7358.9

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value128-11.368552714961501-7.4761031128377-41.311.25710122114612827068-358.231
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating177.7-14.370.735.72194.22485.0-11.71725.82631.7195.9-103.73.3297.0761.7542.8492.41202.9360.5-1731.3

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value13289-249.47426-164.89561141-95.913147-23.073-74.23258
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating183.1112.8-320.234.1-241.8101.6222.2-160.5302.4-58.2-186.4155.3

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value497000.0409000.0-265000.0281000.0-849000.0-1379000.0-1481000.0-1536000.0-1915000.0-798000.0-2942000.0-370000.0-371000.0-309000.0-769000.0-671000.0-47000.0-3000.0-144000.0
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value-25.178295333762-1099.315-871.615408-681.64-986.1062.7399827201-123.763-207.555215-95.488-88.085273
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-34.8371.8427.81000.2-1611.8-1442.7639.5-1140.6-2022.36.9248.172.4590.0-426.2-771.3827.7-425.1-463.41322.5

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value51615955412430201610151615152010149.138.754117.6255.149
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating71.077.976.772.160.440.747.133.933.726.638.744.545.951.975.540.265.748.042.358.545.033.2

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems

mbin:CorporateReconcilingItemsAndEliminations


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-2.743-2.186-3.221-2.168-2.013-1.203-0.874-1.055-0.806-1.319-0.921-0.879-1.372-1.033-1.436-0.908-0.689-0.595-0.574-0.591
Percentage of NetIncomeLoss-5.3-3.5-5.4-3.9-4.9-4.9-2.9-5.2-4.9-12.5-6.0-5.3-8.8-6.9-7.1-8.7-4.7-6.5-6.6-5.1
Percentage of InterestAndDividendIncomeOperating-3.8-2.7-4.1-2.8-3.0-2.0-1.4-1.8-1.7-3.3-2.3-2.3-4.0-3.6-5.3-3.5-3.1-3.1-2.8-3.0
Percentage of InterestAndDividendIncomeOperating mbin:CorporateReconcilingItemsAndEliminations-208.4-179.90.0-203.8-927.6-180.10.0-204.1-163.5-280.00.0-125.6-417.0-389.80.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mbin:BankingSegment


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value21231617117.957.0287.6498.4088.769
Percentage of NetIncomeLoss42.337.127.431.828.732.323.437.851.183.0
Percentage of InterestAndDividendIncomeOperating30.028.921.022.917.313.211.012.817.222.1
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:BankingSegment53.058.20.063.346.027.20.027.432.435.8

us-gaap:OperatingSegments, mbin:MortgageWarehousing


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value21293233271213106.323.8324.9425.6545.7744.634.2775.5464.6233.7954.9854.849
Percentage of NetIncomeLoss41.747.154.261.467.350.645.553.938.436.332.033.836.930.721.053.031.341.656.941.8
Percentage of InterestAndDividendIncomeOperating29.636.741.644.340.620.621.518.313.09.712.415.016.915.915.921.320.620.024.124.5
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:MortgageWarehousing71.675.60.071.465.941.30.035.328.826.60.034.639.439.00.040.237.437.40.041.0

us-gaap:OperatingSegments, mbin:MultiFamilyMortgageBanking


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1011145.8913.6515.399102.7412.517-0.7124.6984.8634.7655.484142.497.7833.5171.8854.61
Percentage of NetIncomeLoss21.319.323.810.78.922.034.013.515.3-6.730.529.130.436.473.223.852.738.521.539.7
Percentage of InterestAndDividendIncomeOperating15.115.018.37.75.48.916.04.65.2-1.811.812.914.018.955.39.634.618.59.123.3
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments mbin:MultiFamilyMortgageBanking5377.95778.30.02404.51404.21285.50.0818.2753.6-215.10.02419.44412.03364.40.02465.36080.56896.10.03940.2

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value51615541242016101516151520
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating71.077.972.160.440.733.933.726.638.744.545.951.975.5
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value51615955412430201610151615152010149.138.754
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating71.077.976.772.160.440.747.133.933.726.638.744.545.951.975.540.265.748.042.3

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value29-194.714-637.866-763.878-562.132-568.352-258.795-445.628-149.701-103.551-131.73429-238.017-169.196-145.8-193.032-201.7331774
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating40.1-244.8-818.7-1001.7-824.2-940.7-405.6-745.7-307.0-261.0-330.879.5-697.5-582.7-541.8-742.3-898.091.7358.9

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.6822.0042.1930.3940.4420.5941.712.6255.4424.2063.7552.3951.991.0550.0340.5360.1960.0220.026
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value128-11.368552714961501-7.4761031128377-41.311.25710122114612827068-358.231
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating177.7-14.370.735.72194.22485.0-11.71725.82631.7195.9-103.73.3297.0761.7542.8492.41202.9360.5-1731.3

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value8.3896.2085.9195.9185.9185.9165.6288.7840.02.8422.5542.5542.5542.5542.2661.9081.8891.8871.888
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateStatedPercentage

mbin:FederalReserveDiscountWindowBorrowings, mbin:LoansInAccordanceWithCRESAct


Debt
Period End2020-09-30
Value0.35
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mbin:FederalReserveDiscountWindowBorrowings mbin:LoansInAccordanceWithCRESAct0.0

mbin:PaycheckProtectionProgramLiquidityFacility, mbin:LoansInAccordanceWithCRESAct


Debt
Period End2020-12-31
Value0.35
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations mbin:PaycheckProtectionProgramLiquidityFacility mbin:LoansInAccordanceWithCRESAct0.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1415161215
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value8594000.05606000.04368000.03254000.03711000.0
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0

mbin:AllowanceForLoanAndLeaseLossRecoveryOfBadDebtsNet

mbin:AllowanceForLoanAndLeaseLossRecoveryOfBadDebtsNet


Allowance
Period End2021-06-302020-09-302019-09-302018-09-30
Value6000.062000.015000.0-36000.0
Percentage of AllowanceForLoanAndLeaseLossRecoveryOfBadDebtsNet100.0100.0100.0100.0

mbin:AllowanceForLoanAndLeaseLossRecoveryOfBadDebtsNet us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialRealEstatePortfolioSegment


Allowance
Period End2020-09-302019-09-302018-09-30
Value62000.015000.0-1000.0
Percentage of AllowanceForLoanAndLeaseLossRecoveryOfBadDebtsNet100.0100.02.8

us-gaap:ConsumerPortfolioSegment


Allowance
Period End2021-06-302018-09-30
Value6000.0-19000.0
Percentage of AllowanceForLoanAndLeaseLossRecoveryOfBadDebtsNet100.052.8

mbin:AmortizationOfMortgageServicingRightsAndFairValueAdjustments

mbin:AmortizationOfMortgageServicingRightsAndFairValueAdjustments


Amortization
Period End2021-03-312020-03-31
Value-3430000.08338000.0
Percentage of AmortizationOfMortgageServicingRightsAndFairValueAdjustments100.0100.0

mbin:CommonStockExchangeTransactionAndRetiredDuringPeriodShares

mbin:CommonStockExchangeTransactionAndRetiredDuringPeriodShares


Common
Period End2020-11-09
Value15000.0
Percentage of CommonStockExchangeTransactionAndRetiredDuringPeriodShares100.0

mbin:DeconsolidationOfEntities us-gaap:StatementEquityComponents

mbin:DeconsolidationOfEntities

us-gaap:RetainedEarnings


Deconsolidation
Period End2021-06-302021-03-31
Value0419000.0
Percentage of DeconsolidationOfEntities0.0100.0

mbin:DeconsolidationRetainedInvestmentFairValue us-gaap:BalanceSheetLocation

mbin:DeconsolidationRetainedInvestmentFairValue

us-gaap:OtherAssets


Deconsolidation
Period End2021-02-01
Value10000000.0
Percentage of DeconsolidationRetainedInvestmentFairValue100.0

mbin:DepositarySharesEquivalentPreferredStockInterestPerShare us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

mbin:DepositarySharesEquivalentPreferredStockInterestPerShare

mbin:PreferredStockSeriesC6Percent, mbin:PublicOffering


Depositary
Period End2021-03-23
Value0.025
Percentage of DepositarySharesEquivalentPreferredStockInterestPerShare100.0

mbin:Dividends6PercentPreferredStock

mbin:Dividends6PercentPreferredStock


Dividends6
Period End2020-09-302020-06-302020-03-312019-09-30
Value1875000.01875000.01875000.0896000.0
Percentage of Dividends6PercentPreferredStock100.0100.0100.0100.0

mbin:Dividends6PercentPreferredStock us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

mbin:PreferredStockSeriesC6Percent, us-gaap:RetainedEarnings


Dividends6
Period End2021-06-30
Value2873000.0
Percentage of Dividends6PercentPreferredStock0.0

mbin:Dividends6PercentPreferredStock us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends6
Period End2021-03-312020-09-302020-06-302020-03-312019-09-30
Value1875000.01875000.01875000.01875000.0896000.0
Percentage of Dividends6PercentPreferredStock0.0100.0100.0100.0100.0

mbin:Dividends7PercentPreferredStock

mbin:Dividends7PercentPreferredStock


Dividends7
Period End2020-09-302020-06-302020-03-312019-09-302019-06-30
Value911000.0911000.0910000.01293000.0911000.0
Percentage of Dividends7PercentPreferredStock100.0100.0100.0100.0100.0

mbin:Dividends7PercentPreferredStock us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends7
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value911000.0910000.0911000.0911000.0910000.01293000.0911000.0
Percentage of Dividends7PercentPreferredStock0.00.0100.0100.0100.0100.0100.0

mbin:Dividends8PercentPreferredStock

mbin:Dividends8PercentPreferredStock


Dividends8
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value832000.0833000.0833000.0833000.0832000.0833000.0833000.0832000.0833000.0
Percentage of Dividends8PercentPreferredStock100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:Dividends8PercentPreferredStock us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends8
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0833000.0832000.0833000.0833000.0833000.0832000.0833000.0833000.0832000.0833000.0
Percentage of Dividends8PercentPreferredStock0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:DividendsPayableCashFlow

mbin:DividendsPayableCashFlow


Dividends
Period End2021-03-31
Value139000.0
Percentage of DividendsPayableCashFlow100.0

mbin:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetChangesInValuationInputsOrAssumptionsUsedInValuationModel us-gaap:FairValueByAssetClass

mbin:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetChangesInValuationInputsOrAssumptionsUsedInValuationModel

us-gaap:Assets


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value654000.06878000.02117000.0-971000.0-500000.0-6480000.01070000.0-1479000.0-2881000.0-1505000.0435000.0500000.01806000.0-893000.03739000.0-1437000.0561000.087000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetChangesInValuationInputsOrAssumptionsUsedInValuationModel100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOriginatedAndPurchasedServicing us-gaap:FairValueByAssetClass

mbin:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOriginatedAndPurchasedServicing

us-gaap:Assets


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value6.527107.4836.4624.0153.9292.6951.3562.2611.026.8481.5632.253.4522.0093.015
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOriginatedAndPurchasedServicing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPaydown us-gaap:FairValueByAssetClass

mbin:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPaydown

us-gaap:Assets


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-03-31
Value-4627000.0-3448000.0-2768000.0-2608000.0-604000.0-1858000.0-1367000.0-2438000.0-1079000.0-1110000.0-1370000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPaydown100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:FinalDividendForRedemptionOf8PercentPreferredStock us-gaap:StatementClassOfStock

mbin:FinalDividendForRedemptionOf8PercentPreferredStock

mbin:PreferredStock8


Final
Period End2021-04-15
Value139000.0
Percentage of FinalDividendForRedemptionOf8PercentPreferredStock100.0

mbin:FinalDividendForRedemptionOf8PercentPreferredStock us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

mbin:PreferredStock8, us-gaap:SubsequentEvent


Final
Period End2021-04-15
Value139000.0
Percentage of FinalDividendForRedemptionOf8PercentPreferredStock100.0

mbin:FinalDividendForRedemptionOf8PercentPreferredStock us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Final
Period End2021-06-302021-03-31
Value0139000.0
Percentage of FinalDividendForRedemptionOf8PercentPreferredStock0.00.0

mbin:GainLossOnSaleOfAvailableForSaleInvestmentsAmountRelatedToAociReclassification

mbin:GainLossOnSaleOfAvailableForSaleInvestmentsAmountRelatedToAociReclassification


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0441000.000352000.00-3000.0127000.00000
Percentage of GainLossOnSaleOfAvailableForSaleInvestmentsAmountRelatedToAociReclassification0.0100.00.00.0100.00.0100.0100.00.00.00.00.0

mbin:GainLossOnSaleOfSecurities

mbin:GainLossOnSaleOfSecurities


Gain
Period End2020-12-312019-12-31
Value0352000.0
Percentage of GainLossOnSaleOfSecurities0.0100.0

mbin:IncomeTaxExpenseBenefitRelatedToReclassificationItems

mbin:IncomeTaxExpenseBenefitRelatedToReclassificationItems


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-30
Value0-97000.000-86000.001000.032000.0000000010000.0
Percentage of IncomeTaxExpenseBenefitRelatedToReclassificationItems0.0100.00.00.0100.00.0100.0100.00.00.00.00.00.00.00.0100.0

mbin:PaymentOfUnderwritingDiscounts us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

mbin:PaymentOfUnderwritingDiscounts

mbin:PreferredStockSeriesC6Percent, mbin:PublicOffering


Payment
Period End2021-03-23
Value5100000.0
Percentage of PaymentOfUnderwritingDiscounts100.0

mbin:PreferredStockLiquidationPreferenceDepositaryShares us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

mbin:PreferredStockLiquidationPreferenceDepositaryShares

mbin:PreferredStockSeriesC6Percent, mbin:PublicOffering


Preferred
Period End2021-03-23
Value25.0
Percentage of PreferredStockLiquidationPreferenceDepositaryShares100.0

mbin:ServicingFeesAmount

mbin:ServicingFeesAmount


Servicing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1727000.07951000.03069000.0-643000.01597000.0-5824000.02200000.0-1410000.0-1561000.0-347000.01657000.01851000.02555000.0-322000.03972000.0-83000.0395000.01989000.0
Percentage of ServicingFeesAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:ShareBasedCompensationArrangementAwardForAnnualFee us-gaap:TitleOfIndividual

mbin:ShareBasedCompensationArrangementAwardForAnnualFee

mbin:NonExecutiveDirector


Share
Period End2021-01-31
Value50000.0
Percentage of ShareBasedCompensationArrangementAwardForAnnualFee100.0

mbin:ShortTermDebtMaturityPeriodMaximum us-gaap:DebtInstrument

mbin:ShortTermDebtMaturityPeriodMaximum

mbin:FederalReserveDiscountWindowBorrowings


Short
Period End2020-09-30
Value90.0
Percentage of ShortTermDebtMaturityPeriodMaximum100.0

us-gaap:AllowanceForLoanAndLeaseLossRecoveryOfBadDebts

us-gaap:AllowanceForLoanAndLeaseLossRecoveryOfBadDebts


Allowance
Period End2021-03-312020-03-312019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2000.044000.003000.036000.031000.05000.00075000.060000.0
Percentage of AllowanceForLoanAndLeaseLossRecoveryOfBadDebts100.0100.00.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:AllowanceForLoanAndLeaseLossRecoveryOfBadDebts us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ConsumerPortfolioSegment


Allowance
Period End2021-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value2000.019000.015000.04000.00034000.0
Percentage of AllowanceForLoanAndLeaseLossRecoveryOfBadDebts100.052.848.480.00.00.056.7

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-31
Value-86000.0-74000.0-125000.0-104000.0-131000.0-1000.00-107000.0-857000.0-147000.074000.0-146000.0-17000.0
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialRealEstatePortfolioSegment


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value-84000.0-68000.0-94000.0-94000.0-131000.0-3000.00-854000.0-1000.046000.0-135000.0
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs97.791.975.290.4100.00.0-0.099.60.762.292.5

us-gaap:ConsumerPortfolioSegment


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312018-09-302018-06-302018-03-31
Value0-6000.00-10000.00-1000.028000.0-11000.0-17000.0
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs-0.08.1-0.09.6-0.0100.037.87.5100.0

us-gaap:ResidentialPortfolioSegment


Allowance
Period End2021-06-30
Value-2000.0
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs2.3

us-gaap:AmortizationOfMortgageServicingRightsMSRs

us-gaap:AmortizationOfMortgageServicingRightsMSRs


Amortization
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.6513.5791.1048.3380.2973.9173.962.6150.4940.158-0.5672.263-2.0482.521.8830.1994.41
Percentage of AmortizationOfMortgageServicingRightsMSRs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CommonStockDividendsPerShareDeclared


Common
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.320.320.320.070.070.070.060.060.060.060.05
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommunicationsAndInformationTechnology

us-gaap:CommunicationsAndInformationTechnology


Communications
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value971000.0937000.0832000.0903000.0716000.0610000.0848000.0674000.0629000.0472000.0548000.0412000.0293000.0291000.0340000.0325000.0261000.0245000.0288000.0276000.0
Percentage of CommunicationsAndInformationTechnology100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain


Debt
Period End2020-12-312020-09-302019-12-31
Value0441000.0352000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedGain0.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss


Debt
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-31
Value0441000.0352000.00-3000.0127000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedGainLoss0.0100.0100.00.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss


Debt
Period End2020-12-312020-09-302019-12-312019-09-302019-06-30
Value00003000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedLoss0.00.00.00.0100.0

us-gaap:DebtSecuritiesTradingUnrealizedGainLoss

us-gaap:DebtSecuritiesTradingUnrealizedGainLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value6000000.01000000.0-800000.0-400000.01400000.02200000.01400000.0756000.0399000.0545000.0
Percentage of DebtSecuritiesTradingUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value557000.0504000.0487000.0494000.0462000.0453000.0416000.0151000.0148000.0137000.0125000.0123000.0110000.0103000.095000.070000.064000.067000.069000.0
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:DerivativeGainLossOnDerivativeNet


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1243000.01652000.0-5623000.0-1108000.01629000.0-31000.0-75000.0119000.024000.0-5000.014000.0-79000.0-148000.0219000.0
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:DerivativeInstrumentRisk

us-gaap:ForwardContracts


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-2289000.08396000.0-3605000.0-3515000.0-2114000.0-1844000.027000.0-25000.0-50000.0-5000.012000.016000.0-197000.0105000.0
Percentage of DerivativeGainLossOnDerivativeNet184.2508.264.1317.2-129.85948.4-36.0-21.0-208.3100.085.7-20.3133.147.9

us-gaap:InterestRateLockCommitments


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-31
Value1046000.0-6744000.0-2018000.02407000.03743000.01813000.0-102000.0144000.074000.02000.0-95000.049000.0114000.0
Percentage of DerivativeGainLossOnDerivativeNet-84.2-408.235.9-217.2229.8-5848.4136.0121.0308.314.3120.3-33.152.1

us-gaap:DerivativeGainOnDerivative us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeGainOnDerivative

us-gaap:InterestRateSwap


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value195000.0886000.0289000.0634000.02703000.0
Percentage of DerivativeGainOnDerivative100.0100.0100.0100.0100.0

us-gaap:DerivativeLossOnDerivative us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeLossOnDerivative

us-gaap:InterestRateSwap


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value195000.0886000.0289000.0634000.02703000.0
Percentage of DerivativeLossOnDerivative100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock

us-gaap:DividendsCommonStock


Dividends
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2300000.02299000.02298000.02009000.02010000.02009000.01722000.01721000.01722000.01721000.01434000.0
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2591000.02590000.02300000.02299000.02298000.02009000.02010000.02009000.01722000.01721000.01722000.01721000.01434000.0
Percentage of DividendsCommonStock0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1 us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1

us-gaap:InterestRateLockCommitments, us-gaap:DerivativeFinancialInstrumentsAssets


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value20000.0-5664000.0-2019000.02408000.03663000.01893000.0-110000.0149000.076000.01000.02000.0-102000.054000.0116000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales


Fair
Period End2021-06-302017-09-302016-09-30
Value-438000.0-1083000.0-1798000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByLiabilityClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings

us-gaap:InterestRateLockCommitments, us-gaap:DerivativeFinancialInstrumentsLiabilities


Fair
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value-1026000.01080000.01000.0-80000.080000.05000.02000.01000.0-7000.05000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FederalDepositInsuranceCorporationPremiumExpense


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value651000.0671000.0759000.01404000.01851000.01786000.01393000.0859000.0218000.0277000.0273000.0269000.0236000.0246000.0226000.0230000.0210000.0264000.0235000.0324000.0
Percentage of FederalDepositInsuranceCorporationPremiumExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FeesAndCommissionsMortgageBankingAndServicing

us-gaap:FeesAndCommissionsMortgageBankingAndServicing


Fees
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.0794.1165.9266.8335.4752.7462.5552.6991.1380.7530.6020.7780.6840.4860.6010.7490.6620.596
Percentage of FeesAndCommissionsMortgageBankingAndServicing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSalesOfLoansNet

us-gaap:GainLossOnSalesOfLoansNet


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value252828291721158.3129.1042.643118.8257.831109.9777.204155.4427.64610
Percentage of GainLossOnSalesOfLoansNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSecuritizationOfFinancialAssets us-gaap:TypeOfArrangement

us-gaap:GainLossOnSecuritizationOfFinancialAssets

mbin:LoanSaleAndFreddieMacQSeriesSecuritization


Gain
Period End2021-05-07
Value-676000.0
Percentage of GainLossOnSecuritizationOfFinancialAssets100.0

us-gaap:ImpairedFinancingReceivableAverageRecordedInvestment

us-gaap:ImpairedFinancingReceivableAverageRecordedInvestment


Impaired
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value8.495121514141312129.7089.4859.5663.6464.845.523.148
Percentage of ImpairedFinancingReceivableAverageRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableAverageRecordedInvestment us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.1751.622.2312.0922.0430.2140.3140.3640.4250.6340.6350.2820.2430.203
Percentage of ImpairedFinancingReceivableAverageRecordedInvestment2.113.114.714.513.71.52.53.04.46.76.67.75.03.7

us-gaap:CommercialRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value6.1138.018109.2299.5028.2647.6598.4687.2546.6746.5873.1334.2714.9743.014
Percentage of ImpairedFinancingReceivableAverageRecordedInvestment72.064.666.264.063.859.460.469.174.770.468.985.988.290.195.7

us-gaap:ConsumerPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.0060.0080.0140.0170.020.0260.0520.0480.1870.1960.146
Percentage of ImpairedFinancingReceivableAverageRecordedInvestment0.10.10.10.10.10.20.40.41.92.11.5

us-gaap:ResidentialPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value2.2012.7612.8922.9163.0885.1724.0912.8061.0421.0950.7290.2310.3260.3430.134
Percentage of ImpairedFinancingReceivableAverageRecordedInvestment25.922.319.020.220.737.232.322.910.711.57.66.36.76.24.3

us-gaap:ImpairedFinancingReceivableInterestIncomeCashBasisMethod

us-gaap:ImpairedFinancingReceivableInterestIncomeCashBasisMethod


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value71000.0215000.081000.097000.0113000.0147000.096000.0136000.0164000.0155000.0182000.0155000.0191000.071000.0162000.011000.0-21000.031000.029000.010000.0
Percentage of ImpairedFinancingReceivableInterestIncomeCashBasisMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableInterestIncomeCashBasisMethod us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value55000.0205000.066000.090000.094000.0131000.088000.0127000.0118000.0140000.0198000.098000.079000.046000.0161000.011000.0-20000.030000.029000.010000.0
Percentage of ImpairedFinancingReceivableInterestIncomeCashBasisMethod77.595.381.592.883.289.191.793.472.090.3108.863.241.464.899.4100.095.296.8100.0100.0

us-gaap:ConsumerPortfolioSegment


Impaired
Period End2020-09-302019-09-302019-06-302018-12-312018-09-302018-06-30
Value001000.0001000.0
Percentage of ImpairedFinancingReceivableInterestIncomeCashBasisMethod0.00.00.60.00.00.5

us-gaap:ResidentialPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value16000.010000.015000.07000.019000.016000.09000.09000.045000.015000.0-1000.021000.030000.03000.01000.0
Percentage of ImpairedFinancingReceivableInterestIncomeCashBasisMethod22.54.718.57.216.810.99.46.627.49.7-0.513.515.74.23.2

us-gaap:IncreaseDecreaseInDeposits

us-gaap:IncreaseDecreaseInDeposits


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value-23.6046533231761851244-21.5738431534-110.031-166.929126113824212927270-356.331
Percentage of IncreaseDecreaseInDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value8.137-4.065-4.1613.205-0.31517-1.176-1.659.188-2.6995.3050.4460.8653.4070.003-0.614-12.0171.1274.282
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value-3.57315-9.9069.106-6.6149.82214-2.168101.933-0.0221.581-6.0587.918-4.7-6.3585.9194.289-2.647
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInTradingSecurities

us-gaap:IncreaseDecreaseInTradingSecurities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value2993-35.988-144.0675319541126-28.4-33.50589-60.959-64.9555919-23.696-36.77844-82.423
Percentage of IncreaseDecreaseInTradingSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value91512.078322.010220.032848.018455.024780.02353.038515.040984.035189.04315.033786.028056.019604.010642.08160.013523.08857.0585.02761.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndDividendIncomeOperating


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value72797776686063594839393734292626221920191615
Percentage of InterestAndDividendIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndDividendIncomeOperating us-gaap:ConsolidationItems

mbin:CorporateReconcilingItemsAndEliminations


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.3161.2150.8861.0640.2170.6680.5860.5170.4930.4710.4410.70.3290.265
Percentage of InterestAndDividendIncomeOperating1.81.51.11.40.31.10.90.91.01.21.11.91.00.9

us-gaap:InterestAndDividendIncomeOperating us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mbin:BankingSegment


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value40393227252928272524
Percentage of InterestAndDividendIncomeOperating56.649.742.136.237.748.443.946.853.361.7

us-gaap:OperatingSegments, mbin:MortgageWarehousing


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2938444742303430211415161411121312101211
Percentage of InterestAndDividendIncomeOperating41.348.556.562.161.649.854.751.845.036.240.043.543.040.846.453.055.053.458.659.7

us-gaap:OperatingSegments, mbin:MultiFamilyMortgageBanking


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.2040.2070.2380.2450.260.420.3280.3350.3340.3310.240.2010.1080.1630.1340.1010.1280.0510.0550.117
Percentage of InterestAndDividendIncomeOperating0.30.30.30.30.40.70.50.60.70.80.60.50.30.60.50.40.60.30.30.6

us-gaap:InterestExpenseBorrowings

us-gaap:InterestExpenseBorrowings


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1348000.01486000.01568000.01832000.01572000.01434000.01127000.01098000.01495000.01316000.01861000.02425000.02176000.01914000.02125000.01957000.02000000.01705000.01822000.01841000.0
Percentage of InterestExpenseBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDeposits

us-gaap:InterestExpenseDeposits


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value6.6836.17.1069.10415202526191413119.7417.0165.8335.6594.743.7713.6873.016
Percentage of InterestExpenseDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeDebtSecuritiesTradingOperating

us-gaap:InterestIncomeDebtSecuritiesTradingOperating


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.7243.1362.5423.252.5342.7962.2561.4221.9671.045
Percentage of InterestIncomeDebtSecuritiesTradingOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value64706562493535312723222221181717151314141211
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss us-gaap:ConsolidationItems

mbin:CorporateReconcilingItemsAndEliminations


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2.11.7921.5461.8131.412.4962.7592.2752.4581.4391.4211.7291.1450.7251.1070.1430.1210.086-0.14-0.318
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss3.22.52.42.92.87.17.77.28.86.16.37.65.43.96.30.80.80.6-0.9-2.2

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mbin:BankingSegment


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value34302218121513141414
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss52.643.234.429.225.844.138.646.053.963.9

us-gaap:OperatingSegments, mbin:MortgageWarehousing


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2837404235161814106.7187.8778.8198.9617.3868.354108.7377.2899.3029.174
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss43.854.062.867.570.847.652.845.736.028.634.938.642.339.547.657.856.454.862.362.3

us-gaap:OperatingSegments, mbin:MultiFamilyMortgageBanking


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.2040.2070.2380.2450.260.420.3280.3350.3340.3310.240.2010.1080.1630.1340.1010.1280.0510.0550.117
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss0.30.30.40.40.51.20.91.11.21.41.10.90.50.90.80.60.80.40.40.8

us-gaap:InterestIncomeFederalHomeLoanBankAdvances

us-gaap:InterestIncomeFederalHomeLoanBankAdvances


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value392000.0384000.0341000.0531000.0447000.0239000.0190000.0262000.0257000.0223000.088000.087000.081000.0129000.081000.080000.079000.081000.080000.080000.0
Percentage of InterestIncomeFederalHomeLoanBankAdvances100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeOther

us-gaap:InterestIncomeOther


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.2040.1470.080.1520.2342.4592.8933.6262.6422.3042.7632.5942.1381.7661.3091.3510.8930.8730.5610.602
Percentage of InterestIncomeOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxExempt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value9000.011000.011000.037000.038000.037000.055000.068000.053000.096000.0
Percentage of InterestIncomeSecuritiesTaxExempt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:InterestIncomeSecuritiesTaxable


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value833000.0354000.0422000.0431000.0972000.01322000.01576000.01604000.01477000.01551000.01740000.01541000.01625000.01542000.0
Percentage of InterestIncomeSecuritiesTaxable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense

us-gaap:LaborAndRelatedExpense


Labor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value182116161114109.1399.9658.567107.8427.2686.4877.0555.355.1753.8924.2443.798
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoanPortfolioExpense

us-gaap:LoanPortfolioExpense


Loan
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1921000.02523000.02938000.02944000.02039000.01164000.01007000.01248000.01345000.0934000.01109000.01254000.01302000.0956000.01025000.01119000.01069000.0884000.01174000.01171000.0
Percentage of LoanPortfolioExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestExpense

us-gaap:NoninterestExpense


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2830272620221815151316121210108.9428.2616.6417.3847.1736.3765.787
Percentage of NoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestExpense us-gaap:ConsolidationItems

mbin:CorporateReconcilingItemsAndEliminations


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value4.3583.6194.953.753.1963.2383.1822.8972.9412.6022.6172.3652.1331.9832.2961.611.2351.0470.8080.662
Percentage of NoninterestExpense15.512.018.014.215.814.516.918.718.520.016.219.017.819.321.318.014.915.810.99.2

us-gaap:NoninterestExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mbin:BankingSegment


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value7.4967.1257.6077.1456.0975.6885.0483.7084.8624.12
Percentage of NoninterestExpense26.623.727.727.130.125.526.823.930.531.6

us-gaap:OperatingSegments, mbin:MortgageWarehousing


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2.7032.8963.2933.5343.5213.0193.4422.8292.792.3361.8021.9982.1851.7361.8712.1091.9431.7872.2072.042
Percentage of NoninterestExpense9.69.612.013.417.413.518.318.217.517.911.116.018.216.917.323.623.526.929.928.5

us-gaap:OperatingSegments, mbin:MultiFamilyMortgageBanking


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value131611117.468107.1646.0885.3273.9777.2594.3464.2183.3823.8262.7132.7771.5952.3252.012
Percentage of NoninterestExpense48.354.742.345.336.846.438.039.233.530.544.934.935.132.935.430.333.624.031.528.0

us-gaap:NoninterestIncome

us-gaap:NoninterestIncome


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value32434238261922109.873.66414111111148.056168.0916.924116.6583.293
Percentage of NoninterestIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncome us-gaap:ConsolidationItems

mbin:CorporateReconcilingItemsAndEliminations


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1.409-1.093-0.938-1.022-0.942-0.921-0.686-0.739-0.688-0.663-0.514-0.564-0.532-0.336
Percentage of NoninterestIncome-4.3-2.5-2.2-2.6-3.6-4.6-3.0-6.8-7.0-18.1-3.5-4.7-4.6-3.0

us-gaap:NoninterestIncome us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mbin:BankingSegment


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.6137.6787.207129.1790.683-0.01-0.8670.9990.883
Percentage of NoninterestIncome8.017.516.932.035.13.4-0.0-8.010.124.1

us-gaap:OperatingSegments, mbin:MortgageWarehousing


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value3.0794.1175.9276.8345.6262.7762.5852.6991.1410.7530.6010.7790.6840.4860.7570.7760.6780.6251.1520.89
Percentage of NoninterestIncome9.49.413.917.721.513.911.424.911.620.64.16.55.94.35.19.64.17.716.67.7

us-gaap:OperatingSegments, mbin:MultiFamilyMortgageBanking


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value283330201217209.7598.4182.69113101010146.636157.2235.3889.52
Percentage of NoninterestIncome87.075.671.553.047.187.291.789.985.373.493.991.391.392.998.182.491.689.377.881.9

us-gaap:NoninterestIncomeOther

us-gaap:NoninterestIncomeOther


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2.9273.2494.9012.5282.0321.8142.2441.2511.1920.4880.7580.4530.560.2570.3570.1860.4020.0640.2580.1
Percentage of NoninterestIncomeOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OccupancyNet

us-gaap:OccupancyNet


Occupancy
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1808000.01627000.01438000.01420000.01383000.01492000.01793000.0994000.0946000.0876000.0726000.0736000.0761000.0565000.0522000.0326000.0398000.0356000.0341000.0331000.0
Percentage of OccupancyNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-30
Value-253000.0-125000.0-33000.0-301000.0-218000.0468000.0-234000.052000.0486000.0464000.0987000.0173000.097000.0-318000.0-535000.086000.0-586000.0-103000.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-253000.0-125000.0-301000.0-218000.0468000.052000.0486000.0464000.0987000.0173000.097000.0-318000.0-535000.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax


Other
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302016-09-30
Value0344000.0266000.00-2000.014000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax0.0100.0100.00.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-09-30
Value0-97000.000-86000.001000.032000.000000010000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax0.0100.00.00.0100.00.0100.0100.00.00.00.00.00.00.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-253000.0-125000.0-33000.043000.0-218000.0468000.032000.052000.0484000.0559000.0987000.0173000.097000.0-318000.0-535000.086000.0-67000.0138000.0-586000.0-89000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-87000.0-43000.0-10000.022000.0-83000.0-152000.034000.07000.0153000.0192000.0279000.058000.054000.0-97000.0-361000.057000.0-46000.096000.0-398000.0-59000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoninterestExpense

us-gaap:OtherNoninterestExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value3184000.02630000.03276000.02434000.01739000.02432000.02547000.02100000.02364000.01370000.02052000.01346000.01463000.01237000.01207000.01031000.0833000.0785000.0747000.01069000.0
Percentage of OtherNoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities


Payment
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value000501000.0823000.0
Percentage of PaymentForContingentConsiderationLiabilityFinancingActivities0.00.00.0100.0100.0

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value131281663620462292162346211551118911100973473776445719337342409843084847503845085332
Percentage of PaymentsForOriginationAndPurchasesOfLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromLoansReceivable

us-gaap:PaymentsForProceedsFromLoansReceivable


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value795045945604592473671601098048218137134107128-69.773-99.359
Percentage of PaymentsForProceedsFromLoansReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302016-12-31
Value-830000.0464000.0-713000.0250000.0-2000.00-148000.02000.0-78000.0-48000.0-134000.0
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForRepurchaseOfRedeemablePreferredStock us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

us-gaap:PaymentsForRepurchaseOfRedeemablePreferredStock

mbin:PreferredStock8, us-gaap:SubsequentEvent


Payments
Period End2021-04-15
Value41
Percentage of PaymentsForRepurchaseOfRedeemablePreferredStock100.0

us-gaap:PaymentsOfStockIssuanceCosts us-gaap:StatementClassOfStock

us-gaap:PaymentsOfStockIssuanceCosts

mbin:PreferredStockSeriesC6Percent


Payments
Period End2021-05-06
Value0.023
Percentage of PaymentsOfStockIssuanceCosts100.0

us-gaap:PaymentsOfStockIssuanceCosts us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

mbin:PreferredStockSeriesC6Percent, us-gaap:PreferredStock


Payments
Period End2021-06-302021-03-31
Value0.05.1
Percentage of PaymentsOfStockIssuanceCosts0.00.0

us-gaap:PaymentsOfStockIssuanceCosts us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

mbin:PreferredStockSeriesC6Percent, us-gaap:SubsequentEvent


Payments
Period End2021-05-06
Value0.05
Percentage of PaymentsOfStockIssuanceCosts217.4

us-gaap:PaymentsOfStockIssuanceCosts us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

mbin:PreferredStockSeriesC6Percent, mbin:PublicOffering


Payments
Period End2021-03-23
Value150
Percentage of PaymentsOfStockIssuanceCosts0.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1300.003162742031562642587945
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt us-gaap:FinancialInstrument, us-gaap:TypeOfArrangement

mbin:MortgageBackedSecuritiesPurchasedFromFreddieMac, mbin:LoanSaleAndFreddieMacQSeriesSecuritization


Payments
Period End2021-05-07
Value28
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt0.0

us-gaap:PaymentsToAcquireFederalHomeLoanBankStock

us-gaap:PaymentsToAcquireFederalHomeLoanBankStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0177.068251.791.1591.066110.7230.1030.0120.118
Percentage of PaymentsToAcquireFederalHomeLoanBankStock0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireLimitedPartnershipInterests

us-gaap:PaymentsToAcquireLimitedPartnershipInterests


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-1.8833.4862.1070.760.2241.090.8051.2991.6930.0130.8490.0161.80.029
Percentage of PaymentsToAcquireLimitedPartnershipInterests100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireLoansHeldForInvestment

us-gaap:PaymentsToAcquireLoansHeldForInvestment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value113137149131723225281914263443343231333624
Percentage of PaymentsToAcquireLoansHeldForInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStockDividendRatePercentage us-gaap:StatementClassOfStock

us-gaap:PreferredStockDividendRatePercentage

mbin:PreferredStock6


Preferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-08-192019-09-30
Value06.00.060.0600.066.0
Percentage of PreferredStockDividendRatePercentage0.0100.0100.0100.00.0100.0100.0

mbin:PreferredStock7


Preferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-232019-09-302019-06-302019-03-282019-03-232019-03-31
Value07.00.070.0700.077.00.070.070.070.07
Percentage of PreferredStockDividendRatePercentage0.0116.7116.7116.70.0116.70.00.00.00.00.0

mbin:PreferredStock8


Preferred
Period End2021-04-152021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value8.008.008.00.080.0808.00.080.08
Percentage of PreferredStockDividendRatePercentage0.00.00.00.0133.3133.3133.30.0133.30.00.0

mbin:PreferredStockSeriesB6Percent


Preferred
Period End2021-06-302021-03-31
Value06.0
Percentage of PreferredStockDividendRatePercentage0.00.0

mbin:PreferredStockSeriesC6Percent


Preferred
Period End2021-06-302021-03-31
Value06.0
Percentage of PreferredStockDividendRatePercentage0.00.0

us-gaap:PreferredStockDividendRatePercentage us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

mbin:PreferredStock8, us-gaap:SubsequentEvent


Preferred
Period End2021-04-15
Value8.0
Percentage of PreferredStockDividendRatePercentage0.0

mbin:PreferredStockSeriesC6Percent, us-gaap:SubsequentEvent


Preferred
Period End2021-05-06
Value6.0
Percentage of PreferredStockDividendRatePercentage0.0

us-gaap:PreferredStockDividendRatePercentage us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

mbin:PreferredStockSeriesC6Percent, mbin:PublicOffering


Preferred
Period End2021-03-23
Value6.0
Percentage of PreferredStockDividendRatePercentage0.0

us-gaap:PreferredStockDividendsPerShareDeclared us-gaap:StatementClassOfStock

us-gaap:PreferredStockDividendsPerShareDeclared

mbin:PreferredStock6


Preferred
Period End2020-09-302020-06-302020-03-312019-09-30
Value60.060.060.07.1667
Percentage of PreferredStockDividendsPerShareDeclared100.0100.0100.0100.0

mbin:PreferredStock7


Preferred
Period End2020-09-302020-06-302020-03-312019-09-302019-06-30
Value1.751.751.750.43750.4375
Percentage of PreferredStockDividendsPerShareDeclared2.92.92.96.10.0

mbin:PreferredStock8


Preferred
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value80.080.080.020.020.020.020.020.020.0
Percentage of PreferredStockDividendsPerShareDeclared133.3133.3133.3279.10.00.00.00.00.0

us-gaap:ProceedsFromIssuanceOfDebt

us-gaap:ProceedsFromIssuanceOfDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2651177542951020302567755972030
Percentage of ProceedsFromIssuanceOfDebt100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfPreferredStockAndPreferenceStock

us-gaap:ProceedsFromIssuanceOfPreferredStockAndPreferenceStock


Proceeds
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-31
Value46144-0.0431202348
Percentage of ProceedsFromIssuanceOfPreferredStockAndPreferenceStock100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfPreferredStockAndPreferenceStock us-gaap:StatementClassOfStock

mbin:PreferredStockSeriesC6Percent


Proceeds
Period End2021-05-06
Value46
Percentage of ProceedsFromIssuanceOfPreferredStockAndPreferenceStock0.0

us-gaap:ProceedsFromIssuanceOfPreferredStockAndPreferenceStock us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

mbin:PreferredStockSeriesC6Percent, us-gaap:SubsequentEvent


Proceeds
Period End2021-05-06
Value46
Percentage of ProceedsFromIssuanceOfPreferredStockAndPreferenceStock0.0

us-gaap:ProceedsFromIssuanceOfPreferredStockAndPreferenceStock us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

mbin:PreferredStockSeriesC6Percent, mbin:PublicOffering


Proceeds
Period End2021-03-23
Value144
Percentage of ProceedsFromIssuanceOfPreferredStockAndPreferenceStock0.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value21271715028210727621011549161103525721.1420.09825
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromNotesPayable

us-gaap:ProceedsFromNotesPayable


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.001-0.0012.310.450.20.9140.84.4049.5825.334
Percentage of ProceedsFromNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForSecuritiesPurchasedUnderAgreementsToResell

us-gaap:ProceedsFromPaymentsForSecuritiesPurchasedUnderAgreementsToResell


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value37000.036000.036000.035000.034000.038000.037000.038000.040000.037000.038000.041000.048000.041000.037000.0-1745000.027000.030000.028000.0
Percentage of ProceedsFromPaymentsForSecuritiesPurchasedUnderAgreementsToResell100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt


Proceeds
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value340.04.30.00.06.7340.00.03531
Percentage of ProceedsFromSaleOfAvailableForSaleSecuritiesDebt100.00.0100.00.00.0100.00.0100.0100.0

us-gaap:ProceedsFromSaleOfFederalHomeLoanBankStock

us-gaap:ProceedsFromSaleOfFederalHomeLoanBankStock


Proceeds
Period End2020-12-312019-12-312018-12-31
Value0230000.0482000.0
Percentage of ProceedsFromSaleOfFederalHomeLoanBankStock0.0100.0100.0

us-gaap:ProceedsFromSaleOfLoansHeldForSale

us-gaap:ProceedsFromSaleOfLoansHeldForSale


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value131141697420729297972239510866123091043563183729464018897476402041175036488644565525
Percentage of ProceedsFromSaleOfLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfLoansReceivable us-gaap:FinancingReceivablePortfolioSegment, us-gaap:TypeOfArrangement

us-gaap:ProceedsFromSaleOfLoansReceivable

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment, mbin:LoanSaleAndFreddieMacQSeriesSecuritization


Proceeds
Period End2021-05-07
Value262
Percentage of ProceedsFromSaleOfLoansReceivable100.0

us-gaap:ProfessionalFees

us-gaap:ProfessionalFees


Professional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value779000.0422000.01657000.0712000.0726000.0569000.0826000.0508000.0453000.0539000.0830000.0590000.0677000.0488000.0425000.0561000.0315000.0215000.0355000.0204000.0
Percentage of ProfessionalFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanAndLeaseLosses

us-gaap:ProvisionForLoanAndLeaseLosses


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-315000.01663000.0-19562000.02981000.01745000.02998000.0-5887000.01193000.0105000.0649000.0-7650000.0617000.0998000.01406000.0-1400000.0-592000.0240000.0240000.0-240000.0-240000.0
Percentage of ProvisionForLoanAndLeaseLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanAndLeaseLosses us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-21000.0-4000.0-221000.021000.049000.038000.0-194000.014000.052000.034000.0-216000.035000.059000.013000.0-13000.0-36000.0-35000.037000.0-25000.0-21000.0
Percentage of ProvisionForLoanAndLeaseLosses6.7-0.21.10.72.81.33.31.249.55.22.85.75.90.90.96.1-14.615.410.48.8

mbin:MortgageWarehouseLinesOfCreditPortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-386000.0-697000.0-4269000.0874000.0494000.0796000.0-1982000.0533000.0311000.0186000.0-1221000.073000.0140000.0223000.0-10000.08000.0100000.0-192000.0141000.0256000.0
Percentage of ProvisionForLoanAndLeaseLosses122.5-41.921.829.328.326.633.744.7296.228.716.011.814.015.90.7-1.441.7-80.0-58.8-106.7

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-1354000.02405000.0-12139000.01566000.02184000.0676000.0-855000.0753000.0-1233000.0347000.0-3928000.0240000.0412000.0748000.0-800000.0-276000.0329000.0135000.0-66000.0-159000.0
Percentage of ProvisionForLoanAndLeaseLosses429.8144.662.152.5125.222.514.563.1-1174.353.551.338.941.353.257.146.6137.156.227.566.2

us-gaap:CommercialRealEstatePortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1059000.0-309000.0-951000.013000.0-1188000.01445000.0-2717000.0-174000.01003000.071000.0-1538000.0184000.0252000.0323000.0-341000.0-688000.0-148000.0518000.0153000.0-284000.0
Percentage of ProvisionForLoanAndLeaseLosses-336.2-18.64.90.4-68.148.246.2-14.6955.210.920.129.825.323.024.4116.2-61.7215.8-63.8118.3

us-gaap:ConsumerPortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value16000.02000.038000.03000.0-42000.023000.0-77000.04000.033000.07000.0-43000.0-11000.02000.023000.0-173000.0-14000.0-16000.0-16000.02000.0-14000.0
Percentage of ProvisionForLoanAndLeaseLosses-5.10.1-0.20.1-2.40.81.30.331.41.10.6-1.80.21.612.42.4-6.7-6.7-0.85.8

us-gaap:ResidentialPortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value371000.0266000.0-2020000.0504000.0248000.020000.0-62000.063000.0-61000.04000.0-704000.096000.0133000.076000.0-63000.0414000.010000.0-242000.0-445000.0-18000.0
Percentage of ProvisionForLoanAndLeaseLosses-117.816.010.316.914.20.71.15.3-58.10.69.215.613.35.44.5-69.94.2-100.8185.47.5

us-gaap:ProvisionForLoanLossesExpensed

us-gaap:ProvisionForLoanLossesExpensed


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-0.3151.6634.1142.9811.7452.9981.9931.1930.1050.6491.6080.6170.9981.4061.40.5920.240.240.240.240.240.24
Percentage of ProvisionForLoanLossesExpensed100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, mbin:BankingSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-0.2752.7473.9162.292.5451.8181.510.778-0.2220.516
Percentage of ProvisionForLoanLossesExpensed87.3165.295.276.8145.860.675.865.2-211.479.5

us-gaap:OperatingSegments, mbin:MortgageWarehousing


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.04-1.0840.1980.691-0.81.180.4830.4150.3270.1330.1870.2270.2840.6740.202-0.1550.1580.247-0.472-0.061
Percentage of ProvisionForLoanLossesExpensed12.7-65.24.823.2-45.839.424.234.8311.420.511.636.828.547.914.4-26.265.8102.9-196.7-25.4

us-gaap:RepaymentsOfDebt

us-gaap:RepaymentsOfDebt


Repayments
Period End2021-03-312020-03-31
Value185575334
Percentage of RepaymentsOfDebt100.0100.0

us-gaap:SaleOfStockPercentageOfOwnershipBeforeTransaction us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:SaleOfStockPercentageOfOwnershipBeforeTransaction

mbin:InvestmentInArclineLendingLlc


Sale
Period End2020-11-09
Value44.23
Percentage of SaleOfStockPercentageOfOwnershipBeforeTransaction100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-31
Value0537000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan0.0100.0

us-gaap:StockIssuedDuringPeriodValueIssuedForServices us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:StockIssuedDuringPeriodValueIssuedForServices

mbin:InvestmentInArclineLendingLlc


Stock
Period End2020-11-09
Value150000.0
Percentage of StockIssuedDuringPeriodValueIssuedForServices100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value154000.0203000.0106000.0133000.0184000.0133000.036000.069000.011000.050000.0416000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value362000.080000.0154000.0203000.0106000.0133000.0184000.0133000.036000.069000.011000.050000.0416000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRedeemedOrCalledDuringPeriodValue us-gaap:StatementClassOfStock

us-gaap:StockRedeemedOrCalledDuringPeriodValue

mbin:PreferredStock8


Stock
Period End2021-04-15
Value41
Percentage of StockRedeemedOrCalledDuringPeriodValue100.0

us-gaap:StockRedeemedOrCalledDuringPeriodValue us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

mbin:PreferredStock8, us-gaap:PreferredStock


Stock
Period End2021-06-30
Value-41.581
Percentage of StockRedeemedOrCalledDuringPeriodValue0.0

us-gaap:StockRedeemedOrCalledDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Stock
Period End2021-06-30
Value-0.045
Percentage of StockRedeemedOrCalledDuringPeriodValue0.0

mbin:AdditionalCapitalConservationBufferRequirementSubsequentYearsRatio us-gaap:RegulatoryAgency

mbin:AdditionalCapitalConservationBufferRequirementSubsequentYearsRatio

mbin:FederalDepositCorporationAndFederalReserveBoard


Additional
Period End2020-12-31
Value2.5
Percentage of AdditionalCapitalConservationBufferRequirementSubsequentYearsRatio100.0

mbin:AvailableForSaleSecuritiesAndSecuritiesPurchasedUnderAgreementsToResellPledgedAsCollateral

mbin:AvailableForSaleSecuritiesAndSecuritiesPurchasedUnderAgreementsToResellPledgedAsCollateral


Available
Period End2020-12-312019-12-312018-12-312017-12-31
Value261276269407
Percentage of AvailableForSaleSecuritiesAndSecuritiesPurchasedUnderAgreementsToResellPledgedAsCollateral100.0100.0100.0100.0

mbin:BrokeredCertificateOfDeposits

mbin:BrokeredCertificateOfDeposits


Brokered
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value291962578347127
Percentage of BrokeredCertificateOfDeposits100.0100.0100.0100.0100.0

mbin:BrokeredDemandDepositAccounts

mbin:BrokeredDemandDepositAccounts


Brokered
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value8201030020560
Percentage of BrokeredDemandDepositAccounts100.0100.0100.0100.0100.0

mbin:BrokeredDeposits

mbin:BrokeredDeposits


Brokered
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value11732156988941638
Percentage of BrokeredDeposits100.0100.0100.0100.0100.0

mbin:BrokeredDepositsSavingsDeposits

mbin:BrokeredDepositsSavingsDeposits


Brokered
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value324184109389450
Percentage of BrokeredDepositsSavingsDeposits100.0100.0100.0100.0100.0

mbin:CashAccountsInExcessOfFederallyInsuredLimits

mbin:CashAccountsInExcessOfFederallyInsuredLimits


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value165492331349437
Percentage of CashAccountsInExcessOfFederallyInsuredLimits100.0100.0100.0100.0100.0

mbin:CashAccountsInExcessOfFederallyInsuredLimitsWithFederalHomeLoanBankOfChicago

mbin:CashAccountsInExcessOfFederallyInsuredLimitsWithFederalHomeLoanBankOfChicago


Cash
Period End2020-12-312019-12-312018-12-31
Value23000.020000.015000.0
Percentage of CashAccountsInExcessOfFederallyInsuredLimitsWithFederalHomeLoanBankOfChicago100.0100.0100.0

mbin:CashAccountsInExcessOfFederallyInsuredLimitsWithFederalHomeLoanBankOfIndianapolis

mbin:CashAccountsInExcessOfFederallyInsuredLimitsWithFederalHomeLoanBankOfIndianapolis


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2.72.3123.52.8
Percentage of CashAccountsInExcessOfFederallyInsuredLimitsWithFederalHomeLoanBankOfIndianapolis100.0100.0100.0100.0100.0

mbin:CashAccountsInExcessOfFederallyInsuredLimitsWithFederalReserveBank

mbin:CashAccountsInExcessOfFederallyInsuredLimitsWithFederalReserveBank


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value157478295327426
Percentage of CashAccountsInExcessOfFederallyInsuredLimitsWithFederalReserveBank100.0100.0100.0100.0100.0

mbin:DeconsolidationBorrowings

mbin:DeconsolidationBorrowings


Deconsolidation
Period End2021-02-01
Value52
Percentage of DeconsolidationBorrowings100.0

mbin:DeconsolidationLoansReceivable

mbin:DeconsolidationLoansReceivable


Deconsolidation
Period End2021-02-01
Value66
Percentage of DeconsolidationLoansReceivable100.0

mbin:DeconsolidationNetAssets

mbin:DeconsolidationNetAssets


Deconsolidation
Period End2021-02-01
Value10000000.0
Percentage of DeconsolidationNetAssets100.0

mbin:DeferredAndCurrentTaxLiabilitiesNet

mbin:DeferredAndCurrentTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value184120161815121215122117
Percentage of DeferredAndCurrentTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:DeferredTaxAssetsFairValueAdjustmentsOnAcquisitions

mbin:DeferredTaxAssetsFairValueAdjustmentsOnAcquisitions


Deferred
Period End2020-12-312019-12-31
Value174000.0228000.0
Percentage of DeferredTaxAssetsFairValueAdjustmentsOnAcquisitions100.0100.0

mbin:DeferredTaxLiabilitiesUnrealizedLossesOnAvailableForSaleSecurities

mbin:DeferredTaxLiabilitiesUnrealizedLossesOnAvailableForSaleSecurities


Deferred
Period End2020-12-312019-12-31
Value105000.0121000.0
Percentage of DeferredTaxLiabilitiesUnrealizedLossesOnAvailableForSaleSecurities100.0100.0

mbin:DepositarySharesIssuancePricePerShare us-gaap:StatementClassOfStock

mbin:DepositarySharesIssuancePricePerShare

mbin:PreferredStockSeriesC6Percent


Depositary
Period End2021-05-06
Value25.0
Percentage of DepositarySharesIssuancePricePerShare100.0

mbin:DepositarySharesIssuancePricePerShare us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

mbin:PreferredStockSeriesC6Percent, us-gaap:SubsequentEvent


Depositary
Period End2021-05-06
Value25.0
Percentage of DepositarySharesIssuancePricePerShare100.0

mbin:FederalReserveDiscountWindowAdvancesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

mbin:FederalReserveDiscountWindowAdvancesFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Federal
Period End2020-09-302020-06-30
Value382575
Percentage of FederalReserveDiscountWindowAdvancesFairValueDisclosure100.0100.0

mbin:FederalReserveDiscountWindowAdvancesFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Federal
Period End2020-09-302020-06-30
Value382575
Percentage of FederalReserveDiscountWindowAdvancesFairValueDisclosure100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Federal
Period End2020-09-302020-06-30
Value382575
Percentage of FederalReserveDiscountWindowAdvancesFairValueDisclosure100.0100.0

mbin:FederalReserveDiscountWindowAndPPPLFAdvancesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

mbin:FederalReserveDiscountWindowAndPPPLFAdvancesFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Federal
Period End2020-12-31
Value112
Percentage of FederalReserveDiscountWindowAndPPPLFAdvancesFairValueDisclosure100.0

mbin:FederalReserveDiscountWindowAndPPPLFAdvancesFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Federal
Period End2020-12-31
Value112
Percentage of FederalReserveDiscountWindowAndPPPLFAdvancesFairValueDisclosure100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Federal
Period End2020-12-31
Value112
Percentage of FederalReserveDiscountWindowAndPPPLFAdvancesFairValueDisclosure100.0

mbin:FirstLossPositionInLoanPortfolioMaximumSecuritizationPoolAmount us-gaap:TypeOfArrangement

mbin:FirstLossPositionInLoanPortfolioMaximumSecuritizationPoolAmount

mbin:LoanSaleAndFreddieMacQSeriesSecuritization


First
Period End2021-05-07
Value26
Percentage of FirstLossPositionInLoanPortfolioMaximumSecuritizationPoolAmount100.0

mbin:FirstLossPositionInLoanPortfolioMaximumSecuritizationPoolPercentage us-gaap:TypeOfArrangement

mbin:FirstLossPositionInLoanPortfolioMaximumSecuritizationPoolPercentage

mbin:LoanSaleAndFreddieMacQSeriesSecuritization


First
Period End2021-05-07
Value10.0
Percentage of FirstLossPositionInLoanPortfolioMaximumSecuritizationPoolPercentage100.0

mbin:FirstLossPositionInLoanPortfolioReservesForLosses us-gaap:TypeOfArrangement

mbin:FirstLossPositionInLoanPortfolioReservesForLosses

mbin:LoanSaleAndFreddieMacQSeriesSecuritization


First
Period End2021-05-07
Value1400000.0
Percentage of FirstLossPositionInLoanPortfolioReservesForLosses100.0

mbin:ImpairedLoansFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

mbin:ImpairedLoansFairValueDisclosure

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring


Impaired
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value3807000.04059000.01090000.01262000.01306000.01570000.01600000.01600000.01600000.02639000.0149000.0371000.0758000.02126000.0225000.0
Percentage of ImpairedLoansFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:ImpairedLoansFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel3, mbin:CollateralDependentImpairedLoans


Impaired
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3807000.04059000.01090000.01262000.01306000.01570000.01600000.01600000.01600000.02639000.0
Percentage of ImpairedLoansFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:ImpairedLoansFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsNonrecurring


Impaired
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value3807000.04059000.01090000.01262000.01306000.01570000.01600000.01600000.01600000.02639000.0149000.0371000.0758000.02126000.0225000.0
Percentage of ImpairedLoansFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:ImpairedLoansMeasurementInputMarketabilityDiscountRate us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

mbin:ImpairedLoansMeasurementInputMarketabilityDiscountRate

us-gaap:FairValueInputsLevel3, mbin:CollateralDependentImpairedLoans


Impaired
Period End2021-06-302020-12-312019-09-302019-06-30
Value49.043.00.370.37
Percentage of ImpairedLoansMeasurementInputMarketabilityDiscountRate100.0100.0100.0100.0

mbin:ImpairedLoansMeasurementInputMarketabilityDiscountRate us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

srt:Minimum, us-gaap:FairValueInputsLevel3, mbin:CollateralDependentImpairedLoans


Impaired
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value43.050.00.450.440.370.17
Percentage of ImpairedLoansMeasurementInputMarketabilityDiscountRate100.00.00.00.00.00.0

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, mbin:CollateralDependentImpairedLoans


Impaired
Period End2021-06-302020-12-312020-09-302020-06-30
Value49.043.050.00.46
Percentage of ImpairedLoansMeasurementInputMarketabilityDiscountRate100.0100.00.00.0

mbin:InterestPayableFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

mbin:InterestPayableFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2.4712.091.4763.9686.1321011137.6434.934.1326.0644.6553.9962.8172.3641.791
Percentage of InterestPayableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:InterestPayableFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2.4712.091.4763.9686.1321011137.6434.934.1326.0644.6553.9962.8172.3641.791
Percentage of InterestPayableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2.4712.091.4763.9686.1321011137.6434.934.1326.0644.6553.9962.8172.3641.791
Percentage of InterestPayableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:InterestReceivableFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

mbin:InterestReceivableFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value222221191818181817141312109.6278.3267.1965.368
Percentage of InterestReceivableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:InterestReceivableFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value222221191818181817141312109.6278.3267.1965.368
Percentage of InterestReceivableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value222221191818181817141312109.6278.3267.1965.368
Percentage of InterestReceivableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:LoansAndLeasesReceivableAmountOutstandingModifiedUnderCaresAct

mbin:LoansAndLeasesReceivableAmountOutstandingModifiedUnderCaresAct


Loans
Period End2021-06-302021-03-312020-12-31
Value37370.937
Percentage of LoansAndLeasesReceivableAmountOutstandingModifiedUnderCaresAct100.0100.0100.0

mbin:MaximumPercentageOfParticipationInterestToBePurchasedInIndividualLoans

mbin:MaximumPercentageOfParticipationInterestToBePurchasedInIndividualLoans


Maximum
Period End2020-12-31
Value100.0
Percentage of MaximumPercentageOfParticipationInterestToBePurchasedInIndividualLoans100.0

mbin:OtherAssetsAndReceivables

mbin:OtherAssetsAndReceivables


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value5557495047483029332832252524222331
Percentage of OtherAssetsAndReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:OtherBorrowingsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

mbin:OtherBorrowingsFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Other
Period End2021-06-302021-03-31
Value79124
Percentage of OtherBorrowingsFairValueDisclosure100.0100.0

mbin:OtherBorrowingsFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Other
Period End2021-06-302021-03-31
Value79124
Percentage of OtherBorrowingsFairValueDisclosure100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Other
Period End2021-06-302021-03-31
Value79124
Percentage of OtherBorrowingsFairValueDisclosure100.0100.0

mbin:OtherReceivablesMarginAmountOnForwardTrades

mbin:OtherReceivablesMarginAmountOnForwardTrades


Other
Period End2020-12-31
Value2100000.0
Percentage of OtherReceivablesMarginAmountOnForwardTrades100.0

mbin:ReserveLiabilityForRiskSharingObligation

mbin:ReserveLiabilityForRiskSharingObligation


Reserve
Period End2020-12-312019-12-31
Value448000.0277000.0
Percentage of ReserveLiabilityForRiskSharingObligation100.0100.0

mbin:ResidentialLoansInProcessOfForeclosure us-gaap:FinancingReceivablePortfolioSegment

mbin:ResidentialLoansInProcessOfForeclosure

us-gaap:ResidentialPortfolioSegment


Residential
Period End2021-03-312019-12-312017-12-312016-12-31
Value692000.0725000.000
Percentage of ResidentialLoansInProcessOfForeclosure100.0100.00.00.0

mbin:ShortTermSubordinatedDebt us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

mbin:ShortTermSubordinatedDebt

srt:ParentCompany, srt:ReportableLegalEntities


Short
Period End2020-12-312019-12-312018-12-31
Value141210
Percentage of ShortTermSubordinatedDebt100.0100.0100.0

mbin:TimeDeposits250000OrMore

mbin:TimeDeposits250000OrMore


Time
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value258128465627
Percentage of TimeDeposits250000OrMore100.0100.0100.0100.0100.0

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestments

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestments


Amortization
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1414171512
Percentage of AmortizationMethodQualifiedAffordableHousingProjectInvestments100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value386000.0413000.0496000.0523000.0923000.01200000.0618000.0624000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:FinancialInstrument

mbin:MunicipalSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value107000.0101000.090000.087000.0513000.0385000.0360000.0336000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax27.724.518.116.655.632.158.353.8

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value256000.0266000.0279000.0318000.0333000.0343000.0213000.0254000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax66.364.456.260.836.128.634.540.7

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value13000.029000.0103000.084000.036000.0423000.024000.08000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax3.47.020.816.13.935.23.91.3

us-gaap:USTreasuryNotesSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value10000.017000.024000.034000.041000.049000.021000.026000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax2.64.14.86.54.44.13.44.2

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value415000.0102000.017000.01000.025000.01000.039000.01082000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:FinancialInstrument

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Available
Period End2020-09-302020-06-302020-03-312019-12-312018-12-31
Value1000.02000.01000.02000.079000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.08.0100.05.17.3

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-06-302019-12-312018-12-31
Value412000.0102000.017000.023000.037000.0972000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax99.3100.0100.092.094.989.8

us-gaap:USTreasuryNotesSecurities


Available
Period End2021-06-302018-12-31
Value3000.013000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.71.2

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value315241269278258337289331
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FinancialInstrument

mbin:MunicipalSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value5.9315.9335.9355.9375.5555.5665.57721
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis1.92.52.22.12.11.61.96.3

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value4921212223243460
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis15.78.98.18.19.07.111.918.3

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value254209234245225306244237
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis80.987.087.288.387.390.684.671.8

us-gaap:USTreasuryNotesSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value5.0134.0256.5353.9933.9911.9944.74411
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis1.61.72.41.41.50.61.63.6

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value7.0668.0776.2883.4973.4962023169414917916620618416419868
Percentage of AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value7.0698.0866.3023.5113.5142023169414917816520518416419868
Percentage of AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value0.3450.3460.8510.8534.7695.2985.3097.9237.947.957116.26.26.2
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value0.3790.3740.8960.8945.2215.6695.6598.58.3868.252126.26.26.2
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-09-302019-06-302019-03-312018-12-31
Value513000.0514000.0515000.0516000.01587000.02079000.02120000.07087000.0
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-09-302019-06-302019-03-312018-12-31
Value553000.0549000.0549000.0549000.01686000.02190000.02210000.07203000.0
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value257210239250227287226246118987279149198212206232
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value257210239251227288226246119987278148197211206231
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value265219247255235314255272224258270244360387382404299
Percentage of AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value265219247255235313255272223258270245362389384405300
Percentage of AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4921212223243435363860
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4921222223243435363860
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:AvailableForSaleSecuritiesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value315241269278259339290331
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasuryNotesSecurities


Available
Period End2021-06-302020-12-31
Value5.026.559
Percentage of AvailableForSaleSecuritiesDebtSecurities1.62.4

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasurySecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value4.0426.5594.0274.0322.0434.76511
Percentage of AvailableForSaleSecuritiesDebtSecurities1.72.41.41.60.61.63.6

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value4921222223243460
Percentage of AvailableForSaleSecuritiesDebtSecurities15.79.08.28.29.17.211.918.4

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value254209235245225306244236
Percentage of AvailableForSaleSecuritiesDebtSecurities80.786.887.188.287.090.484.471.6

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:USStatesAndPoliticalSubdivisions


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value6.0386.0346.0256.0246.0685.9515.93721
Percentage of AvailableForSaleSecuritiesDebtSecurities1.92.52.22.22.31.82.06.4

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementsRecurring, us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value4921222223243460
Percentage of AvailableForSaleSecuritiesDebtSecurities15.79.08.28.29.17.211.918.4

us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value254209235245225306244236
Percentage of AvailableForSaleSecuritiesDebtSecurities80.786.887.188.287.090.484.471.6

us-gaap:FairValueMeasurementsRecurring, us-gaap:USStatesAndPoliticalSubdivisions


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value6.0386.0346.0256.0246.0685.9515.93721
Percentage of AvailableForSaleSecuritiesDebtSecurities1.92.52.22.22.31.82.06.4

us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasuryNotesSecurities


Available
Period End2021-06-302020-12-31
Value5.026.559
Percentage of AvailableForSaleSecuritiesDebtSecurities1.62.4

us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasurySecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value4.0426.5594.0274.0322.0434.76511
Percentage of AvailableForSaleSecuritiesDebtSecurities1.72.41.41.60.61.63.6

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FinancialInstrument

mbin:MunicipalSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value6.0386.0346.0256.0246.0685.9515.93721
Percentage of AvailableForSaleSecuritiesDebtSecurities1.92.52.22.22.31.82.06.4

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value4921222223243460
Percentage of AvailableForSaleSecuritiesDebtSecurities15.79.08.28.29.17.211.918.4

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value254209235245225306244236
Percentage of AvailableForSaleSecuritiesDebtSecurities80.786.887.188.287.090.484.471.6

us-gaap:USTreasuryNotesSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value5.024.0426.5594.0274.0322.0434.76511
Percentage of AvailableForSaleSecuritiesDebtSecurities1.61.72.41.41.60.61.63.6

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FinancialInstrument, us-gaap:TypeOfArrangement

mbin:MortgageBackedSecuritiesPurchasedFromFreddieMac, mbin:LoanSaleAndFreddieMacQSeriesSecuritization


Available
Period End2021-06-30
Value28
Percentage of AvailableForSaleSecuritiesDebtSecurities9.0

us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired

mbin:LimitedPartnership


Business
Period End2020-12-31
Value22.22
Percentage of BusinessAcquisitionPercentageOfVotingInterestsAcquired100.0

us-gaap:EquityMethodInvestee


Business
Period End2020-12-312019-12-312017-12-312016-12-31
Value44.230.44230.30.3
Percentage of BusinessAcquisitionPercentageOfVotingInterestsAcquired199.10.00.00.0

us-gaap:Capital dei:LegalEntity

us-gaap:Capital

mbin:JoyStateBank


Capitaldei:
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2421201919174.4744.3414.414
Percentage of Capital100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:MerchantsBankOfIndiana


Capitaldei:
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value781639613516478412461439422406283255
Percentage of Capital3194.42941.73043.52672.32468.92351.510306.710129.79570.00.00.00.0

us-gaap:Capital us-gaap:ConsolidatedEntities

srt:ParentCompany


Capitalus-gaap:
Period End2020-12-312019-12-312019-09-302019-06-302018-12-31
Value792637609491393
Percentage of Capital3240.32934.13026.72542.12244.7

us-gaap:CapitalRequiredForCapitalAdequacy dei:LegalEntity

us-gaap:CapitalRequiredForCapitalAdequacy

mbin:JoyStateBank


Capital
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1913119.9329.8767.5592.8763.3083.216
Percentage of CapitalRequiredForCapitalAdequacy100.0100.0100.0100.0100.0100.0100.0100.0100.0

mbin:MerchantsBankOfIndiana


Capital
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value718426439357262248248238229207178151
Percentage of CapitalRequiredForCapitalAdequacy3594.43207.23883.43600.42655.23284.78651.77224.17126.30.00.00.0

us-gaap:CapitalRequiredForCapitalAdequacy us-gaap:ConsolidatedEntities

srt:ParentCompany


Capital
Period End2020-12-312019-12-312019-09-302019-06-302018-12-31
Value738440450367255
Percentage of CapitalRequiredForCapitalAdequacy3694.03307.33982.23701.43385.2

us-gaap:CapitalRequiredForCapitalAdequacyToRiskWeightedAssets dei:LegalEntity, us-gaap:Range

us-gaap:CapitalRequiredForCapitalAdequacyToRiskWeightedAssets

mbin:JoyStateBank, srt:Minimum


Capital
Period End2020-12-31
Value8.0
Percentage of CapitalRequiredForCapitalAdequacyToRiskWeightedAssets100.0

mbin:MerchantsBankOfIndiana, srt:Minimum


Capital
Period End2020-12-31
Value8.0
Percentage of CapitalRequiredForCapitalAdequacyToRiskWeightedAssets100.0

us-gaap:CapitalRequiredForCapitalAdequacyToRiskWeightedAssets us-gaap:ConsolidatedEntities, us-gaap:Range

srt:ParentCompany, srt:Minimum


Capital
Period End2020-12-31
Value8.0
Percentage of CapitalRequiredForCapitalAdequacyToRiskWeightedAssets100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:EstimateOfFairValueFairValueDisclosure


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value402269179429403568506364460313336410352287359566445
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value402269179429403568506364460313336410352287359566445
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value402269179429403568506364460313336410352287359566445
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndDueFromBanks

us-gaap:CashAndDueFromBanks


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1312109.276138.1681315151925201821181410
Percentage of CashAndDueFromBanks100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndDueFromBanks us-gaap:ConsolidatedEntities, us-gaap:ConsolidationItems

srt:ParentCompany, srt:ReportableLegalEntities


Cash
Period End2020-12-312019-12-312018-12-31
Value2.1170.4632.224
Percentage of CashAndDueFromBanks21.03.38.6

us-gaap:CashCollateralForBorrowedSecurities

us-gaap:CashCollateralForBorrowedSecurities


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value3900000.03900000.03900000.03900000.03900000.03100000.0590000.00
Percentage of CashCollateralForBorrowedSecurities100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:CashReserveDepositRequiredAndMade

us-gaap:CashReserveDepositRequiredAndMade


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.0184114104109
Percentage of CashReserveDepositRequiredAndMade0.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnusedBorrowingCapacityAmount

us-gaap:DebtInstrumentUnusedBorrowingCapacityAmount


Debt
Period End2020-12-31
Value2600
Percentage of DebtInstrumentUnusedBorrowingCapacityAmount100.0

us-gaap:DebtLongtermAndShorttermCombinedAmount

us-gaap:DebtLongtermAndShorttermCombinedAmount


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value13481811955657
Percentage of DebtLongtermAndShorttermCombinedAmount100.0100.0100.0100.0100.0

us-gaap:DebtLongtermAndShorttermCombinedAmount us-gaap:CounterpartyName, us-gaap:DebtInstrument

mbin:SpecificCustomer, us-gaap:SubordinatedDebt


Debt
Period End2020-12-312019-12-312018-12-31
Value151210
Percentage of DebtLongtermAndShorttermCombinedAmount1.16.75.4

us-gaap:DebtLongtermAndShorttermCombinedAmount us-gaap:DebtInstrument

mbin:FederalReserveDiscountWindowBorrowings


Debt
Period End2020-12-31
Value50
Percentage of DebtLongtermAndShorttermCombinedAmount3.7

mbin:PaycheckProtectionProgramLiquidityFacility


Debt
Period End2020-12-31
Value62
Percentage of DebtLongtermAndShorttermCombinedAmount4.6

us-gaap:FederalHomeLoanBankAdvances


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value12211621511.6122.006
Percentage of DebtLongtermAndShorttermCombinedAmount90.689.777.62.83.5

us-gaap:SubordinatedDebt


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1412103030
Percentage of DebtLongtermAndShorttermCombinedAmount1.16.75.453.052.6

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger


Debt
Period End2020-09-302018-12-31
Value0.645192
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger us-gaap:FinancialInstrument

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Debt
Period End2020-09-30
Value0.645
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss


Debt
Period End2020-09-302018-12-31
Value1000.0880000.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss us-gaap:FinancialInstrument

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Debt
Period End2020-09-30
Value1000.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months


Debt
Period End2021-06-302020-12-312020-06-302020-03-312019-12-312018-12-31
Value18169901.1139547
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months us-gaap:FinancialInstrument

us-gaap:USGovernmentAgenciesDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-06-302019-12-312018-12-31
Value17913969899428
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months98.90.0100.099.399.259.1

us-gaap:USTreasuryNotesSecurities


Debt
Period End2021-06-302018-12-31
Value1.9961.99
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months1.14.2

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss


Debt
Period End2021-06-302020-12-312020-06-302020-03-312019-12-312018-12-31
Value415000.017000.025000.01000.039000.0202000.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss us-gaap:FinancialInstrument

us-gaap:USGovernmentAgenciesDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-06-302019-12-312018-12-31
Value412000.0102000.017000.023000.037000.097000.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss99.30.0100.092.094.948.0

us-gaap:USTreasuryNotesSecurities


Debt
Period End2021-06-302018-12-31
Value3000.08000.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.74.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition


Debt
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value181690.645901.11395240
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition us-gaap:FinancialInstrument

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Debt
Period End2020-09-302020-06-302020-03-312019-12-312018-12-31
Value0.6450.6751.1130.80915
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition100.00.7100.00.86.5

us-gaap:USGovernmentAgenciesDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-06-302019-12-312018-12-31
Value179139698994219
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition98.90.0100.199.399.191.4

us-gaap:USTreasuryNotesSecurities


Debt
Period End2021-06-302018-12-31
Value1.9962.985
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition1.11.2

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss


Debt
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value415000.017000.01000.025000.01000.039000.01082000.0
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss us-gaap:FinancialInstrument

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Debt
Period End2020-09-302020-06-302020-03-312019-12-312018-12-31
Value1000.02000.01000.02000.079000.0
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss100.08.0100.05.17.3

us-gaap:USGovernmentAgenciesDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-06-302019-12-312018-12-31
Value412000.0102000.017000.023000.037000.0972000.0
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss99.30.0100.092.094.989.8

us-gaap:USTreasuryNotesSecurities


Debt
Period End2021-06-302018-12-31
Value3000.013000.0
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss0.71.2

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2320201619
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1330000.01309000.0854000.0105000.0470000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value7090000.04069000.03366000.02286000.02482000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-31
Value254000.0466000.0618000.0
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesInvestments

us-gaap:DeferredTaxLiabilitiesInvestments


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value497000.01791000.02212000.01446000.0
Percentage of DeferredTaxLiabilitiesInvestments100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesMortgageServicingRights

us-gaap:DeferredTaxLiabilitiesMortgageServicingRights


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1917171619
Percentage of DeferredTaxLiabilitiesMortgageServicingRights100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2460000.01374000.0466000.0152000.0272000.0
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0

us-gaap:DemandDepositAccounts

us-gaap:DemandDepositAccounts


Demand
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value50722099154812791067
Percentage of DemandDepositAccounts100.0100.0100.0100.0100.0

us-gaap:DepositLiabilitiesCollateralIssuedFinancialInstruments

us-gaap:DepositLiabilitiesCollateralIssuedFinancialInstruments


Deposit
Period End2020-12-312019-12-312018-12-312017-12-31
Value269290281401
Percentage of DepositLiabilitiesCollateralIssuedFinancialInstruments100.0100.0100.0100.0

us-gaap:Deposits

us-gaap:Deposits


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value80398063740870846908672254785499465531213231330231763062294329012428
Percentage of Deposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepositsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:DepositsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:EstimateOfFairValueFairValueDisclosure


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value75087570705158975263396733033248291924382550271224802457253425112262
Percentage of DepositsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value532494359119016502762217422511737682679589695604408389166
Percentage of DepositsFairValueDisclosure7.16.55.120.231.469.665.869.359.528.026.721.728.024.616.115.57.3

us-gaap:DepositsFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value80398063740870846908672254785499465531213231330231763062294329012428
Percentage of DepositsFairValueDisclosure107.1106.5105.1120.1131.3169.5165.8169.3159.5128.0126.7121.8128.1124.6116.1115.5107.3

us-gaap:EstimateOfFairValueFairValueDisclosure


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value80418065741070876913673054785500465631203230330131753062294329012428
Percentage of DepositsFairValueDisclosure107.1106.5105.1120.2131.4169.6165.8169.3159.5128.0126.7121.7128.0124.6116.1115.5107.3

us-gaap:DepositsSavingsDeposits

us-gaap:DepositsSavingsDeposits


Deposits
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value19781204100112551194
Percentage of DepositsSavingsDeposits100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetMeasurementInput us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:MeasurementInputType

us-gaap:DerivativeAssetMeasurementInput

srt:Maximum, us-gaap:InterestRateLockCommitments, us-gaap:FairValueInputsLevel3, us-gaap:MeasurementInputMaturity


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value99.099.099.099.00.990.9999.00.990.991.0
Percentage of DerivativeAssetMeasurementInput100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Minimum, us-gaap:InterestRateLockCommitments, us-gaap:FairValueInputsLevel3, us-gaap:MeasurementInputMaturity


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value63.060.055.052.00.530.560.730.730.730.95
Percentage of DerivativeAssetMeasurementInput63.660.655.652.553.556.60.773.773.795.0

srt:WeightedAverage, us-gaap:InterestRateLockCommitments, us-gaap:FairValueInputsLevel3, us-gaap:MeasurementInputMaturity


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value82.078.075.076.00.77
Percentage of DerivativeAssetMeasurementInput82.878.875.876.877.8

us-gaap:DerivativeAssets us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByAssetClass

us-gaap:DerivativeAssets

us-gaap:ForwardContracts, us-gaap:DerivativeFinancialInstrumentsAssets


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value8000.01616000.073000.016000.096000.014000.01000.0
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateLockCommitments, us-gaap:DerivativeFinancialInstrumentsAssets


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value487000.0467000.06131000.08150000.05742000.02079000.0186000.0296000.0147000.071000.070000.0
Percentage of DerivativeAssets6087.528.90.011164.435887.52165.60.02114.314700.00.00.0

us-gaap:InterestRateSwap, us-gaap:DerivativeFinancialInstrumentsAssets


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2089000.02284000.03170000.03559000.03848000.03214000.0511000.048000.0
Percentage of DerivativeAssets26112.5141.30.04875.324050.03347.90.0342.9

us-gaap:DerivativeAssets us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:InterestRateLockCommitments, us-gaap:FairValueInputsLevel3


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value487000.0467000.06131000.08150000.05742000.02079000.0186000.0296000.0147000.071000.070000.0
Percentage of DerivativeAssets6087.528.90.011164.435887.52165.60.02114.314700.00.00.0

us-gaap:DerivativeAssets us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:ForwardContracts, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value8000.01616000.073000.016000.096000.014000.01000.0
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateLockCommitments, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value487000.0467000.06131000.08150000.05742000.02079000.0186000.0296000.0147000.071000.070000.0
Percentage of DerivativeAssets6087.528.90.011164.435887.52165.60.02114.314700.00.00.0

us-gaap:InterestRateSwap, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2089000.02284000.03170000.03559000.03848000.03214000.0511000.048000.0
Percentage of DerivativeAssets26112.5141.30.04875.324050.03347.90.0342.9

us-gaap:DerivativeAssets us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency

us-gaap:ForwardContracts, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value8000.01616000.073000.016000.096000.014000.01000.0
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateLockCommitments, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value487000.0467000.06131000.08150000.05742000.02079000.0186000.0296000.0147000.071000.070000.0
Percentage of DerivativeAssets6087.528.90.011164.435887.52165.60.02114.314700.00.00.0

us-gaap:InterestRateSwap, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2089000.02284000.03170000.03559000.03848000.03214000.0511000.048000.0
Percentage of DerivativeAssets26112.5141.30.04875.324050.03347.90.0342.9

us-gaap:DerivativeAssets us-gaap:FairValueByAssetClass

us-gaap:DerivativeFinancialInstrumentsAssets


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value495000.02083000.06131000.08223000.05758000.02175000.0186000.0310000.0148000.071000.070000.074000.0170000.0128000.0
Percentage of DerivativeAssets6187.5128.90.011264.435987.52265.60.02214.314800.00.00.00.00.00.0

us-gaap:DerivativeLiabilities us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DerivativeLiabilities

us-gaap:InterestRateLockCommitments, us-gaap:FairValueInputsLevel3


Derivative
Period End2021-06-302021-03-312020-09-302020-03-312019-09-302019-06-302019-03-31
Value54000.01080000.01000.080000.08000.03000.01000.0
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilities us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:ForwardContracts, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value223000.021000.02682000.0980000.01249000.01273000.027000.016000.019000.018000.09000.0
Percentage of DerivativeLiabilities413.01.90.098000.00.01591.20.0200.0633.31800.00.0

us-gaap:InterestRateLockCommitments, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-09-302020-03-312019-09-302019-06-302019-03-31
Value54000.01080000.01000.080000.08000.03000.01000.0
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateSwap, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2089000.02284000.03170000.03559000.03848000.03214000.0511000.048000.0
Percentage of DerivativeLiabilities3868.5211.50.0355900.00.04017.50.0600.0

us-gaap:DerivativeLiabilities us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByLiabilityClass

us-gaap:ForwardContracts, us-gaap:DerivativeFinancialInstrumentsLiabilities


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value223000.021000.02682000.0980000.01249000.01273000.027000.016000.019000.018000.09000.0
Percentage of DerivativeLiabilities413.01.90.098000.00.01591.20.0200.0633.31800.00.0

us-gaap:InterestRateLockCommitments, us-gaap:DerivativeFinancialInstrumentsLiabilities


Derivative
Period End2021-06-302021-03-312020-09-302020-03-312019-09-302019-06-302019-03-31
Value54000.01080000.01000.080000.08000.03000.01000.0
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateSwap, us-gaap:DerivativeFinancialInstrumentsLiabilities


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2089000.02284000.03170000.03559000.03848000.03214000.0511000.048000.0
Percentage of DerivativeLiabilities3868.5211.50.0355900.00.04017.50.0600.0

us-gaap:DerivativeLiabilities us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency

us-gaap:ForwardContracts, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value223000.021000.02682000.0980000.01249000.01273000.027000.016000.019000.018000.09000.0
Percentage of DerivativeLiabilities413.01.90.098000.00.01591.20.0200.0633.31800.00.0

us-gaap:InterestRateLockCommitments, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-09-302020-03-312019-09-302019-06-302019-03-31
Value54000.01080000.01000.080000.08000.03000.01000.0
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateSwap, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2089000.02284000.03170000.03559000.03848000.03214000.0511000.048000.0
Percentage of DerivativeLiabilities3868.5211.50.0355900.00.04017.50.0600.0

us-gaap:DerivativeLiabilities us-gaap:FairValueByLiabilityClass

us-gaap:DerivativeFinancialInstrumentsLiabilities


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value277000.01101000.02682000.0981000.01249000.01353000.027000.024000.022000.019000.09000.01000.077000.034000.0
Percentage of DerivativeLiabilities513.0101.90.098100.00.01691.20.0300.0733.31900.00.00.00.00.0

us-gaap:DerivativeLiabilityMeasurementInput us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:MeasurementInputType

us-gaap:DerivativeLiabilityMeasurementInput

srt:Maximum, us-gaap:InterestRateLockCommitments, us-gaap:FairValueInputsLevel3, us-gaap:MeasurementInputMaturity


Derivative
Period End2021-06-302021-03-312020-09-302020-03-312019-09-302019-06-30
Value99.099.099.00.990.990.99
Percentage of DerivativeLiabilityMeasurementInput100.0100.0100.0100.0100.0100.0

srt:Minimum, us-gaap:InterestRateLockCommitments, us-gaap:FairValueInputsLevel3, us-gaap:MeasurementInputMaturity


Derivative
Period End2021-06-302021-03-312020-09-302020-03-312019-09-302019-06-30
Value63.060.052.00.560.730.73
Percentage of DerivativeLiabilityMeasurementInput63.660.652.556.673.773.7

srt:WeightedAverage, us-gaap:InterestRateLockCommitments, us-gaap:FairValueInputsLevel3, us-gaap:MeasurementInputMaturity


Derivative
Period End2021-06-302021-03-312020-09-30
Value82.078.076.0
Percentage of DerivativeLiabilityMeasurementInput82.878.876.8

us-gaap:DerivativeNotionalAmount us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeNotionalAmount

us-gaap:ForwardContracts


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value10721230469624134
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateLockCommitments


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value10520141245235317
Percentage of DerivativeNotionalAmount97.994.7135.564.9146.352.0

us-gaap:InterestRateSwap


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value868882828258
Percentage of DerivativeNotionalAmount80.541.627.211.934.4169.4

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType, us-gaap:PlanName

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:RestrictedStock, mbin:EquityIncentivePlan2017


Employee
Period End2020-12-312019-12-312018-12-31
Value3.11.31.1
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0

us-gaap:EscrowDeposit

us-gaap:EscrowDeposit


Escrow
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value498459412502378
Percentage of EscrowDeposit100.0100.0100.0100.0100.0

us-gaap:FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability us-gaap:FinancialInstrument

us-gaap:FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability

mbin:OutstandingCommitmentsToOriginateLoans


Fair
Period End2020-12-312019-12-312018-12-31
Value1827886507
Percentage of FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability100.0100.0100.0

mbin:StandbyLettersOfCreditIssuedByAnotherPartyOnMerchantsBehalf


Fair
Period End2020-12-312019-12-312018-12-31
Value262623
Percentage of FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability1.53.04.5

mbin:StandbyLettersOfCreditIssuedByMerchants


Fair
Period End2020-12-312019-12-31
Value5026
Percentage of FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability2.83.0

mbin:UnfundedConstructionDraws


Fair
Period End2020-12-312019-12-312018-12-31
Value271287457
Percentage of FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability14.932.590.2

mbin:UnfundedLinesOfWarehouseCredit


Fair
Period End2020-12-312019-12-312018-12-31
Value970774782
Percentage of FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability53.187.4154.3

us-gaap:CommitmentsToExtendCredit


Fair
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1395761676437307
Percentage of FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability76.485.9133.50.00.0

us-gaap:FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability us-gaap:OtherCommitments

mbin:CommitmentsSubjectToCertainPerformanceCriteriaAndCancellationByMerchants


Fair
Period End2020-12-312019-12-312018-12-31
Value306919481747
Percentage of FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability168.0219.9344.5

mbin:CommitmentsSubjectToCreditRiskForMerchants


Fair
Period End2020-12-312019-12-312018-12-31
Value1473788700
Percentage of FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability80.688.9138.0

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1414141414121212111310393430303030
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1414141414121212111310393430303030
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1414141414121212111310393430303030
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:InterestRateLockCommitments, us-gaap:DerivativeFinancialInstrumentsAssets


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.4870.4676.1318.155.7422.0790.1860.2960.1470.0710.070.0680.170.116
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap:FairValueByAssetClass

us-gaap:Assets


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value989682757269747174767771706766625754535552
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue20191.220602.81347.3929.71269.43365.939993.024320.650714.3107393.0111205.7105132.441226.557989.70.00.00.00.00.00.00.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByLiabilityClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue

us-gaap:InterestRateLockCommitments, us-gaap:DerivativeFinancialInstrumentsLiabilities


Fair
Period End2021-06-302021-03-312020-09-302020-03-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value54000.01080000.01000.080000.08000.03000.01000.07000.02000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value6507000.06544000.06580000.06616000.06651000.06685000.06723000.06760000.06798000.06838000.06875000.06913000.06954000.07003000.07043000.07080000.05392000.0
Percentage of FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value6507000.06544000.06580000.06616000.06651000.06685000.06723000.06760000.06798000.06838000.06875000.06913000.06954000.07003000.07043000.07080000.05392000.0
Percentage of FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value6507000.06544000.06580000.06616000.06651000.06685000.06723000.06760000.06798000.06838000.06875000.06913000.06954000.07003000.07043000.07080000.05392000.0
Percentage of FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalHomeLoanBankAdvancesInterestRate us-gaap:Range, us-gaap:DebtInstrument

us-gaap:FederalHomeLoanBankAdvancesInterestRate

srt:Maximum, us-gaap:FederalHomeLoanBankAdvances


Federal
Period End2020-12-312019-12-312018-12-31
Value4.740.04740.0474
Percentage of FederalHomeLoanBankAdvancesInterestRate100.0100.0100.0

srt:Minimum, us-gaap:FederalHomeLoanBankAdvances


Federal
Period End2020-12-312019-12-312018-12-31
Value00.01580.0179
Percentage of FederalHomeLoanBankAdvancesInterestRate0.033.337.8

us-gaap:FederalHomeLoanBankBorrowingsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:FederalHomeLoanBankBorrowingsFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value607406122112211130431162147172921512.7231301441.621.6452.031
Percentage of FederalHomeLoanBankBorrowingsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalHomeLoanBankBorrowingsFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value607406122112211171431162147172921512.7451301441.6121.6242.006
Percentage of FederalHomeLoanBankBorrowingsFairValueDisclosure100.0100.099.9100.0103.6100.199.999.999.6100.0100.0100.8100.0100.099.598.798.8

us-gaap:EstimateOfFairValueFairValueDisclosure


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value607406122112211130431162147172921512.7231301441.621.6452.031
Percentage of FederalHomeLoanBankBorrowingsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalHomeLoanBankStock

us-gaap:FederalHomeLoanBankStock


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value707070705346201818187.9747.6087.7237.7117.5397.5397.539
Percentage of FederalHomeLoanBankStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment

us-gaap:FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value262725221917151311121210109.0737.9497.4416.209
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.6110.6320.6360.6310.610.5610.5230.5020.4880.4460.4090.4070.3720.3160.3040.2910.258
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment2.32.32.52.83.13.23.43.84.13.53.43.83.73.53.83.94.2

mbin:MortgageWarehouseLinesOfCreditPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2.9353.3214.0184.0773.2032.7091.9131.9911.341.0290.8430.5440.4710.3310.2830.2730.373
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment10.912.015.518.316.515.312.615.211.38.27.05.14.73.63.63.76.0

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value151714119.8787.6947.0185.8975.1446.3776.034.9024.6624.253.5022.7021.962
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment58.862.256.951.450.943.546.345.043.450.650.045.846.446.844.136.331.6

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value3.3872.7463.0353.1623.2834.4953.5232.5682.7712.6222.6512.8322.6032.3912.1622.5331.374
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment12.610.011.714.216.925.423.219.623.420.822.026.525.926.427.234.022.1

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.160.1380.140.1460.1520.1890.1650.1760.180.1470.140.1250.1270.1210.1110.1180.102
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment0.60.50.50.70.81.11.11.31.51.21.21.21.31.31.41.61.6

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value3.9693.5973.3272.7962.2942.0332.0191.9781.9291.991.9861.8921.8121.6641.5871.5242.14
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment14.813.012.912.611.811.513.315.116.315.816.517.718.018.320.020.534.5

us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1

us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1852000.01521000.01613000.01180000.01077000.01202000.0681000.0593000.0752000.0745000.0645000.0541000.0541000.0632000.0362000.016000.041000.0
Percentage of FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1852000.01518000.01606000.01162000.01060000.01167000.0650000.0544000.0500000.0500000.0400000.0200000.0200000.0294000.0200000.0
Percentage of FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1100.099.899.698.598.497.195.491.766.567.162.037.037.046.555.2

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302016-12-31
Value3000.07000.018000.016000.029000.023000.014000.030000.0
Percentage of FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment10.20.41.51.52.43.42.473.2

us-gaap:FinancingReceivableCollectivelyEvaluatedForImpairment

us-gaap:FinancingReceivableCollectivelyEvaluatedForImpairment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value5465573055204864413935063015274123462168204619071824156313671205936
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableCollectivelyEvaluatedForImpairment us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value9295999996908585838078696863515146
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment1.71.71.82.02.32.62.83.13.63.73.93.73.84.13.84.35.0

mbin:MortgageWarehouseLinesOfCreditPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value117713341605164712871083764796535411336405397244224233275
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment21.623.329.133.931.130.925.429.022.819.016.521.321.815.716.519.429.4

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value297032062749212518481435134711451001965914738703645529393261
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment54.456.049.843.744.740.944.741.842.744.544.738.738.541.338.732.627.9

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value403351377408423459389289307288290283265242222207108
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment7.46.16.88.410.213.112.910.613.113.314.214.814.515.516.317.211.6

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value15131313141818192017171111119.274129.392
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment0.30.20.20.30.40.50.60.70.90.80.80.60.60.70.71.01.0

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value805728676569468419410405397404409398379356329307235
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment14.712.712.211.711.312.013.614.816.918.720.020.920.822.824.125.525.1

us-gaap:FinancingReceivableIndividuallyEvaluatedForImpairment

us-gaap:FinancingReceivableIndividuallyEvaluatedForImpairment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value7.3858.9851416141412141313119.2679.3519.3057.3363.4715.568
Percentage of FinancingReceivableIndividuallyEvaluatedForImpairment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableIndividuallyEvaluatedForImpairment us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.1580.182.12.2242.2382.0430.2140.3020.3470.370.370.6360.6350.2820.2820.203
Percentage of FinancingReceivableIndividuallyEvaluatedForImpairment2.12.014.513.915.914.51.52.22.63.34.06.86.83.88.13.6

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value6.5926.0429.591109.0199.4259.1528.4377.8848.1868.5766.9746.5396.7476.1792.9825.022
Percentage of FinancingReceivableIndividuallyEvaluatedForImpairment89.367.266.368.464.066.773.159.957.061.076.775.369.972.584.285.990.2

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0060.0060.0120.0110.0190.0160.0230.0250.0530.050.0580.1870.1960.1460.146
Percentage of FinancingReceivableIndividuallyEvaluatedForImpairment0.10.10.10.10.10.10.20.20.40.40.52.02.11.62.0

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.6292.7572.7612.8192.8272.413.1095.1615.0264.2551.6061.0481.0660.7280.7290.2070.343
Percentage of FinancingReceivableIndividuallyEvaluatedForImpairment8.530.719.117.620.017.124.836.736.331.714.411.311.47.89.96.06.2

us-gaap:FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing

us-gaap:FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value399000.02269000.03498000.04484000.04019000.03881000.02569000.03973000.02071000.0779000.0507000.0462000.0653000.01091000.0592000.01969000.0685000.0
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value2197000.02181000.02440000.02221000.01908000.0231000.0386000.0729000.0317000.0307000.0307000.0126000.0117000.0117000.0107000.0
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing96.862.354.455.349.29.09.735.240.760.666.519.310.719.815.6

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-06-302018-03-312017-09-30
Value399000.025000.01240000.01994000.01622000.0396000.0486000.0805000.0121000.0117000.043000.0136000.01969000.0
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing100.01.135.444.540.410.218.920.35.823.16.612.5100.0

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-31
Value7000.08000.05000.01000.026000.01000.010000.06000.08000.09000.08000.0
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing0.30.20.10.00.70.00.30.31.01.80.7

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value40000.069000.045000.0175000.01551000.01851000.02772000.01215000.0454000.074000.0155000.0484000.0714000.0475000.0578000.0
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing1.82.01.04.440.072.169.858.758.314.633.574.165.480.284.4

us-gaap:FinancingReceivableRecordedInvestmentCurrent

us-gaap:FinancingReceivableRecordedInvestmentCurrent


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value5469573254874872414435113015274623542175205419141826156713701198937
Percentage of FinancingReceivableRecordedInvestmentCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentCurrent us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value9293959996908284828078696864515146
Percentage of FinancingReceivableRecordedInvestmentCurrent1.71.61.72.02.32.62.83.13.53.73.83.63.74.13.84.35.0

mbin:MortgageWarehouseLinesOfCreditPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value117713341605164712871083765796536411337405397244224233275
Percentage of FinancingReceivableRecordedInvestmentCurrent21.523.329.333.831.130.925.429.022.818.916.421.221.815.616.419.529.3

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value297032062712212518481435134711451001965914738700645529386261
Percentage of FinancingReceivableRecordedInvestmentCurrent54.355.949.443.644.640.944.741.742.544.444.538.638.341.238.632.227.8

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value407354383415427465394293313295298289269246225207110
Percentage of FinancingReceivableRecordedInvestmentCurrent7.46.27.08.510.313.313.110.713.313.614.515.114.715.816.517.311.8

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value15131313141718192017171111119.274129.392
Percentage of FinancingReceivableRecordedInvestmentCurrent0.30.20.20.30.30.50.60.70.90.80.80.60.60.70.71.01.0

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value806730677571470418407406399404409398379355329307234
Percentage of FinancingReceivableRecordedInvestmentCurrent14.712.712.411.711.411.913.514.817.018.619.920.820.822.724.125.625.0

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2600000.02405000.02823000.03435000.02653000.02676000.02109000.02160000.01731000.01774000.01904000.01443000.03669000.03808000.02548000.0906000.01202000.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value158000.0180000.0181000.0181000.0195000.0214000.0214000.0259000.0282000.0282000.0282000.0282000.0282000.0282000.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus6.17.56.45.37.49.912.414.614.819.57.77.411.131.1

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1880000.01636000.02052000.02618000.01809000.01766000.01118000.0858000.0257000.0228000.0136000.0165000.02146000.02169000.02060000.0417000.0899000.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus72.368.072.776.268.266.053.039.714.812.97.111.458.557.080.846.074.8

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value6000.06000.012000.011000.019000.016000.018000.018000.019000.013000.018000.0154000.0162000.0166000.0146000.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus0.20.20.40.30.70.60.90.81.10.70.910.74.44.45.7

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value556000.0583000.0578000.0625000.0630000.0664000.0740000.0833000.0675000.0702000.0893000.0263000.0275000.0258000.060000.0207000.0303000.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus21.424.220.518.223.724.835.138.639.039.646.918.27.56.82.422.825.2

us-gaap:FinancingReceivableRecordedInvestmentPastDue

us-gaap:FinancingReceivableRecordedInvestmentPastDue


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value3.2936.588478.7078.8769.516129.2445.6426.3263.2173.0358.2155.8744.253104.175
Percentage of FinancingReceivableRecordedInvestmentPastDue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentPastDue us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.4492.375.7032.4052.7262.4892.2420.761.2480.630.6790.6590.7960.5380.4580.3810.294
Percentage of FinancingReceivableRecordedInvestmentPastDue13.636.011.927.630.726.217.88.222.110.021.121.79.79.210.83.67.0

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment


Financing
Period End2021-06-302020-12-312018-06-302018-03-312017-09-30
Value0.505363.1760.1167.42
Percentage of FinancingReceivableRecordedInvestmentPastDue15.376.938.72.069.8

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2.3293.1214.2664.7734.643.0764.2914.2181.5460.6720.550.2742.4762.442.9212.5262.96
Percentage of FinancingReceivableRecordedInvestmentPastDue70.747.48.954.852.332.334.045.627.410.617.19.030.141.568.723.870.9

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.010.0490.0260.0920.6470.6880.10.0740.0580.0340.0820.2280.2020.1890.146
Percentage of FinancingReceivableRecordedInvestmentPastDue0.30.70.11.17.37.20.80.81.00.52.57.52.53.23.4

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1.0481.0741.4370.8633.2635.9754.1922.4664.6661.5821.551.0191.6580.7280.3030.921
Percentage of FinancingReceivableRecordedInvestmentPastDue15.92.216.59.734.347.445.343.773.849.251.112.428.217.12.922.1

us-gaap:FinancingReceivableRecordedInvestmentPastDue us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue

mbin:AgriculturalProductionAndRealEstatePortfolioSegment, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.410.4153.7690.0330.2120.4292.0470.1590.2640.0530.0910.0710.3890.1390.0590.0250.101
Percentage of FinancingReceivableRecordedInvestmentPastDue12.56.37.90.42.44.516.21.74.70.82.82.34.72.41.40.22.4

mbin:AgriculturalProductionAndRealEstatePortfolioSegment, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-06-302020-06-302020-03-312019-06-302017-09-302016-12-31
Value0.0390.0970.1520.0410.0740.086
Percentage of FinancingReceivableRecordedInvestmentPastDue1.21.11.60.70.72.1

mbin:AgriculturalProductionAndRealEstatePortfolioSegment, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1.9551.9342.3722.4171.9080.1950.6010.9430.5770.5880.5880.4070.3990.3990.2820.107
Percentage of FinancingReceivableRecordedInvestmentPastDue29.74.027.227.220.11.56.516.79.118.319.45.06.89.42.72.6

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-06-302018-06-302017-09-30
Value0.1513.1766.13
Percentage of FinancingReceivableRecordedInvestmentPastDue4.638.757.7

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-06-302020-12-312017-09-30
Value0.157361.29
Percentage of FinancingReceivableRecordedInvestmentPastDue4.876.912.1

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-06-302018-03-31
Value0.1970.116
Percentage of FinancingReceivableRecordedInvestmentPastDue6.02.0

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302016-12-31
Value1.0040.6080.1451.5220.2742.2932.4430.480.1910.2450.1090.1480.120.0180.043
Percentage of FinancingReceivableRecordedInvestmentPastDue15.21.31.717.12.918.226.48.53.07.63.61.82.00.21.0

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.050.1820.0760.3680.6220.3350.1110.7410.3060.0520.140.0150.860.1222.018
Percentage of FinancingReceivableRecordedInvestmentPastDue1.52.80.24.16.52.71.213.14.81.61.70.320.21.148.3

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2.2791.9353.5824.6282.752.181.6631.6640.3250.1750.2530.1652.1882.3052.0612.3860.899
Percentage of FinancingReceivableRecordedInvestmentPastDue69.229.47.553.231.022.913.218.05.82.87.95.426.639.248.522.421.5

us-gaap:ConsumerPortfolioSegment, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0040.0350.0070.0330.0140.610.050.0250.0060.0130.0020.0570.010.011
Percentage of FinancingReceivableRecordedInvestmentPastDue0.10.50.00.40.26.40.40.30.10.20.11.90.10.2

us-gaap:ConsumerPortfolioSegment, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-31
Value0.0440.0110.0360.0310.0220.0260.0520.0180.0310.006
Percentage of FinancingReceivableRecordedInvestmentPastDue0.50.10.40.20.20.51.60.60.40.1

us-gaap:ConsumerPortfolioSegment, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0060.0140.0190.0150.6220.0420.0190.0270.0260.0210.0280.1530.1610.1720.146
Percentage of FinancingReceivableRecordedInvestmentPastDue0.20.20.00.27.00.40.20.30.50.30.95.02.02.93.4

us-gaap:ResidentialPortfolioSegment, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302016-12-31
Value0.3160.3640.3440.1651.0023.0890.4380.6143.4310.5791.1110.2180.5750.0560.04
Percentage of FinancingReceivableRecordedInvestmentPastDue4.80.84.01.910.524.54.710.954.218.036.62.79.80.51.0

us-gaap:ResidentialPortfolioSegment, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.0760.080.4460.1380.2890.5620.5480.2460.2370.1780.080.1150.1230.1940.04
Percentage of FinancingReceivableRecordedInvestmentPastDue1.20.25.11.63.04.55.94.43.75.52.61.42.14.60.4

us-gaap:ResidentialPortfolioSegment, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.6560.630.6470.561.9722.3243.2061.6060.9980.8250.3590.6860.960.5340.2070.881
Percentage of FinancingReceivableRecordedInvestmentPastDue10.01.37.46.320.718.434.728.515.825.611.88.416.312.61.921.1

us-gaap:FinancingReceivableRecordedInvestmentPastDue us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.5651.774.7480.5551.9132.3157.4793.0651.3643.6880.9171.3483.9410.8450.0596.2290.184
Percentage of FinancingReceivableRecordedInvestmentPastDue17.226.99.96.421.624.359.333.224.258.328.544.448.014.41.458.64.4

us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.2460.258360.490.6141.0990.9280.6811.0540.5430.2820.0980.2861.0771.0541.5262.104
Percentage of FinancingReceivableRecordedInvestmentPastDue7.53.977.25.66.911.57.47.418.78.68.83.23.518.324.814.450.4

us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2.4824.566.1657.6626.3496.1024.2015.4983.2242.0952.0181.5893.9883.9523.142.8751.887
Percentage of FinancingReceivableRecordedInvestmentPastDue75.469.212.988.071.564.133.359.557.133.162.752.448.567.373.827.045.2

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2020-12-312019-12-312018-12-312017-12-31
Value3298000.01782000.0469000.082000.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CoreDeposits


Finite
Period End2020-12-312019-12-312018-12-31
Value992000.0591000.0169000.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization30.133.236.0

us-gaap:CustomerLists


Finite
Period End2020-12-312019-12-31
Value1570000.0673000.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization47.637.8

us-gaap:LicensingAgreements


Finite
Period End2020-12-312019-12-312018-12-312017-12-31
Value661000.0465000.0269000.074000.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization20.026.157.490.2

us-gaap:TradeNames


Finite
Period End2020-12-312019-12-312018-12-312017-12-31
Value75000.053000.031000.08000.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization2.33.06.69.8

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-31
Value222000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2020-12-31
Value577000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value166000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2020-12-31
Value335000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2020-12-31
Value462000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2020-12-31
Value521000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


Finite
Period End2020-12-312019-12-312018-12-312017-12-31
Value5581000.05581000.04011000.01594000.0
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableRecordedInvestment

us-gaap:ImpairedFinancingReceivableRecordedInvestment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value7.3858.9851416141412141313119.2679.3519.3057.3363.4715.568
Percentage of ImpairedFinancingReceivableRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableRecordedInvestment us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.1580.182.12.2242.2382.0430.2140.3020.3470.370.370.6360.6350.2820.2820.203
Percentage of ImpairedFinancingReceivableRecordedInvestment2.12.014.513.915.914.51.52.22.63.34.06.86.83.88.13.6

us-gaap:CommercialRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value6.5926.0429.591109.0199.4259.1528.4377.8848.1868.5766.9746.5396.7476.1792.9825.022
Percentage of ImpairedFinancingReceivableRecordedInvestment89.367.266.368.464.066.773.159.957.061.076.775.369.972.584.285.990.2

us-gaap:ConsumerPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0060.0060.0120.0110.0190.0160.0230.0250.0530.050.0580.1870.1960.1460.146
Percentage of ImpairedFinancingReceivableRecordedInvestment0.10.10.10.10.10.10.20.20.40.40.52.02.11.62.0

us-gaap:ResidentialPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.6292.7572.7612.8192.8272.413.1095.1615.0264.2551.6061.0481.0660.7280.7290.2070.343
Percentage of ImpairedFinancingReceivableRecordedInvestment8.530.719.117.620.017.124.836.736.331.714.411.311.47.89.96.06.2

us-gaap:ImpairedFinancingReceivableRelatedAllowance

us-gaap:ImpairedFinancingReceivableRelatedAllowance


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1852000.01521000.01613000.01180000.01077000.01202000.0681000.0593000.0752000.0745000.0645000.0541000.0541000.0632000.0362000.016000.041000.0
Percentage of ImpairedFinancingReceivableRelatedAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableRelatedAllowance us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1852000.01518000.01606000.01162000.01060000.01167000.0650000.0544000.0500000.0500000.0400000.0200000.0200000.0294000.0200000.0
Percentage of ImpairedFinancingReceivableRelatedAllowance100.099.899.698.598.497.195.491.766.567.162.037.037.046.555.2

us-gaap:ResidentialPortfolioSegment


Impaired
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302016-12-31
Value3000.07000.018000.016000.029000.023000.014000.030000.0
Percentage of ImpairedFinancingReceivableRelatedAllowance0.20.41.51.52.43.42.473.2

us-gaap:ImpairedFinancingReceivableUnpaidPrincipalBalance

us-gaap:ImpairedFinancingReceivableUnpaidPrincipalBalance


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value7.3858.9851416141412141313119.2679.3519.3057.3363.4715.568
Percentage of ImpairedFinancingReceivableUnpaidPrincipalBalance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableUnpaidPrincipalBalance us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.1580.182.12.2242.2382.0430.2140.3020.3470.370.370.6360.6350.2820.2820.203
Percentage of ImpairedFinancingReceivableUnpaidPrincipalBalance2.12.014.513.915.914.51.52.22.63.34.06.86.83.88.13.6

us-gaap:CommercialRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value6.5926.0429.591109.0199.4259.1528.4377.8848.1868.5766.9746.5396.7476.1792.9825.022
Percentage of ImpairedFinancingReceivableUnpaidPrincipalBalance89.367.266.368.464.066.773.159.957.061.076.775.369.972.584.285.990.2

us-gaap:ConsumerPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0060.0060.0120.0110.0190.0160.0230.0250.0530.050.0580.1870.1960.1460.146
Percentage of ImpairedFinancingReceivableUnpaidPrincipalBalance0.10.10.10.10.10.10.20.20.40.40.52.02.11.62.0

us-gaap:ResidentialPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.6292.7572.7612.8192.8272.413.1095.1615.0264.2551.6061.0481.0660.7280.7290.2070.343
Percentage of ImpairedFinancingReceivableUnpaidPrincipalBalance8.530.719.117.620.017.124.836.736.331.714.411.311.47.89.96.06.2

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1.7263.3258.131311119.8061111107.6396.5156.2945.6984.8483.1895.302
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.1580.182.12.2242.2382.0430.0880.0880.0880.0880.3540.353
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment9.25.425.816.518.917.80.80.81.21.45.66.2

us-gaap:CommercialRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.9330.4363.3198.5156.8347.0286.6626.0195.6055.9075.6364.9744.4564.6174.1192.9825.022
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment54.113.140.863.157.761.267.953.350.956.073.876.370.881.085.093.594.7

us-gaap:ConsumerPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.0060.0060.0070.0110.0070.0070.0120.0140.0530.050.0580.0410.05
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment0.30.20.10.10.10.10.10.10.50.50.80.60.8

us-gaap:ResidentialPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.6292.7032.7042.752.7552.1792.8995.0165.0264.2551.6061.0481.0660.7280.7290.2070.28
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment36.481.333.320.423.319.029.644.445.640.321.016.116.912.815.06.55.3

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1.7263.3258.131311119.8061111107.6396.5156.2945.6984.8483.1895.302
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.1580.182.12.2242.2382.0430.0880.0880.0880.0880.3540.353
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance9.25.425.816.518.917.80.80.81.21.45.66.2

us-gaap:CommercialRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.9330.4363.3198.5156.8347.0286.6626.0195.6055.9075.6364.9744.4564.6174.1192.9825.022
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance54.113.140.863.157.761.267.953.350.956.073.876.370.881.085.093.594.7

us-gaap:ConsumerPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.0060.0060.0070.0110.0070.0070.0120.0140.0530.050.0580.0410.05
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance0.30.20.10.10.10.10.10.10.50.50.80.60.8

us-gaap:ResidentialPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.6292.7032.7042.752.7552.1792.8995.0165.0264.2551.6061.0481.0660.7280.7290.2070.28
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance36.481.333.320.423.319.029.644.445.640.321.016.116.912.815.06.55.3

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value5659000.05660000.06334000.02509000.02269000.02637000.02711000.02788000.02817000.02862000.03546000.02752000.03057000.03607000.02488000.0282000.0266000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value5659000.05606000.06272000.02440000.02185000.02397000.02490000.02418000.02279000.02279000.02940000.02000000.02083000.02130000.02060000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment100.099.099.097.296.390.991.886.780.979.682.972.768.159.182.8

us-gaap:ConsumerPortfolioSegment


Impaired
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302018-09-302018-06-302018-03-312017-12-31
Value5000.012000.09000.011000.011000.0146000.0146000.0146000.0146000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment0.10.50.30.40.45.34.84.05.9

us-gaap:ResidentialPortfolioSegment


Impaired
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302016-12-31
Value54000.057000.069000.072000.0231000.0210000.0145000.063000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment1.00.92.83.28.87.75.223.7

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value5659000.05660000.06334000.02509000.02269000.02637000.02711000.02788000.02817000.02862000.03546000.02752000.03057000.03607000.02488000.0282000.0266000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value5659000.05606000.06272000.02440000.02185000.02397000.02490000.02418000.02279000.02279000.02940000.02000000.02083000.02130000.02060000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance100.099.099.097.296.390.991.886.780.979.682.972.768.159.182.8

us-gaap:ConsumerPortfolioSegment


Impaired
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302018-09-302018-06-302018-03-312017-12-31
Value5000.012000.09000.011000.011000.0146000.0146000.0146000.0146000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance0.10.50.30.40.45.34.84.05.9

us-gaap:ResidentialPortfolioSegment


Impaired
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302016-12-31
Value54000.057000.069000.072000.0231000.0210000.0145000.063000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance1.00.92.83.28.87.75.223.7

us-gaap:InterestBearingDepositLiabilities

us-gaap:InterestBearingDepositLiabilities


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value72257244655464186307639452065300446329923048296525902409232221801861
Percentage of InterestBearingDepositLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestBearingDepositsInBanks

us-gaap:InterestBearingDepositsInBanks


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value388257169419389559492349445293310390334266340551435
Percentage of InterestBearingDepositsInBanks100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestReceivable

us-gaap:InterestReceivable


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value222221191818181817141312109.6278.3267.1965.368
Percentage of InterestReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentInFederalHomeLoanBankStockFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:InvestmentInFederalHomeLoanBankStockFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value707070705346201818187.9747.6087.7237.7117.5397.5397.539
Percentage of InvestmentInFederalHomeLoanBankStockFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentInFederalHomeLoanBankStockFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value707070705346201818187.9747.6087.7237.7117.5397.5397.539
Percentage of InvestmentInFederalHomeLoanBankStockFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value707070705346201818187.9747.6087.7237.7117.5397.5397.539
Percentage of InvestmentInFederalHomeLoanBankStockFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

mbin:AmericanFinancialExchangeExtensionsOfCredit


Line
Period End2021-06-302021-03-31
Value325275
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0100.0

us-gaap:LoansAndLeasesReceivableAllowance

us-gaap:LoansAndLeasesReceivableAllowance


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value282927232018151312131211109.7058.3117.4576.8656.556.256.015.9025.4224.458
Percentage of LoansAndLeasesReceivableAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansAndLeasesReceivableAllowance us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value0.6110.6320.6360.6310.610.5610.5230.5290.5150.4660.4290.4270.3920.3330.320.3070.2710.3060.2690.2440.2230.2220.275
Percentage of LoansAndLeasesReceivableAllowance2.12.22.32.73.03.03.33.94.13.53.43.83.73.43.94.13.94.74.34.13.84.16.2

mbin:MortgageWarehouseLinesOfCreditPortfolioSegment


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value2.9353.3214.0184.0773.2032.7091.9131.9911.5651.2541.0680.7190.6460.5060.2830.2730.2810.1810.3730.5140.770.7040.475
Percentage of LoansAndLeasesReceivableAllowance10.211.414.617.415.614.312.114.512.49.48.46.46.15.23.43.74.12.86.08.613.013.010.7

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value151714119.8787.6947.0185.8975.1446.3776.034.9024.6624.253.5022.7022.4262.0971.9621.8961.7371.3080.689
Percentage of LoansAndLeasesReceivableAllowance55.058.953.648.848.240.744.343.040.847.747.543.644.043.842.136.235.332.031.431.529.424.115.5

us-gaap:CommercialRealEstatePortfolioSegment


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value5.2394.2644.6414.3244.3435.6624.1733.1123.2713.1223.0513.0322.8032.6852.3622.5331.8451.9181.3741.5271.2430.9081.163
Percentage of LoansAndLeasesReceivableAllowance18.314.716.918.521.230.026.322.726.023.424.027.026.527.728.434.026.929.322.025.421.116.726.1

us-gaap:ConsumerPortfolioSegment


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value0.160.1380.140.1460.1530.1950.1730.1840.180.1470.140.2710.2730.2670.2570.1180.1040.120.1020.1040.090.0680.05
Percentage of LoansAndLeasesReceivableAllowance0.60.50.50.60.71.01.11.31.41.11.12.42.62.83.11.61.51.81.61.71.51.31.1

us-gaap:ResidentialPortfolioSegment


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value3.9693.63.3342.8142.312.0622.0421.9921.9291.991.9861.8921.8121.6641.5871.5241.9381.9282.171.7251.8392.2121.806
Percentage of LoansAndLeasesReceivableAllowance13.812.412.112.011.310.912.914.515.314.915.616.817.117.119.120.428.229.434.728.731.240.840.5

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value5472573955354880415335203028275523602181205819171834157313741209941
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome us-gaap:FinancingReceivablePortfolioSegment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value929610110199928585848179706964515146
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome1.71.71.82.12.42.62.83.13.63.73.93.73.84.13.84.35.0

mbin:MortgageWarehouseLinesOfCreditPortfolioSegment


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value117713341605164712871083765796536412337406397245224233275
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome21.523.329.033.831.030.825.328.922.718.916.421.221.715.616.419.329.2

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value297032062749212518481435134711451001965914738703645529393261
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome54.355.949.743.544.540.844.541.642.444.244.438.538.341.038.532.627.7

us-gaap:CommercialRealEstatePortfolioSegment


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value409357387419432468398297315296299290271249228210113
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome7.56.27.08.610.413.313.210.813.413.614.515.114.815.916.617.412.1

us-gaap:ConsumerPortfolioSegment


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value15131313141818192017171112119.42129.392
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.30.20.20.30.40.50.60.70.90.80.80.60.70.70.71.01.0

us-gaap:ResidentialPortfolioSegment


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value806731678572471421413410402409410399380356330307235
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome14.712.712.311.711.412.013.714.917.018.820.020.920.722.724.025.425.0

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

mbin:AgriculturalProductionAndRealEstatePortfolioSegment, us-gaap:Pass


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value9092959695888380817775666562515146
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome1.71.61.72.02.32.52.72.93.43.63.73.53.64.03.74.24.9

mbin:AgriculturalProductionAndRealEstatePortfolioSegment, us-gaap:SpecialMention


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.9323.9234.162.9541.6512.0062.1145.1162.5672.7913.0963.3172.6592.0990.3230.351
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.10.10.10.00.10.10.20.10.10.20.20.10.10.00.0

mbin:AgriculturalProductionAndRealEstatePortfolioSegment, us-gaap:Substandard


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.1580.182.12.2242.2382.0430.2140.3020.3470.370.370.6360.2820.2820.2820.203
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.00.00.00.10.10.00.00.00.00.00.00.00.00.00.0

mbin:MortgageWarehouseLinesOfCreditPortfolioSegment, us-gaap:Pass


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value117713341605164712871083764796535411336405397244224233275
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome21.523.329.033.731.030.825.328.922.718.916.421.221.615.616.419.329.2

mbin:MortgageWarehouseLinesOfCreditPortfolioSegment, us-gaap:SpecialMention


Loans
Period End2020-12-312020-09-302020-06-30
Value0.2220.2230.224
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.00.0

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment, mbin:SpecialMentionCovid19


Loans
Period End2021-03-312020-12-31
Value0.1860.185
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.0

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment, us-gaap:Pass


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value28263078260320311767140413051106959908842693668629527391261
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome51.653.647.041.642.539.943.140.240.641.640.936.136.440.038.432.427.7

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment, us-gaap:SpecialMention


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value14312814594333041384256714534151.81.8
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome2.62.22.61.90.80.91.41.41.82.63.52.41.91.00.10.1

us-gaap:CommercialRealEstatePortfolioSegment, mbin:SpecialMentionCovid19


Loans
Period End2021-03-312020-12-31
Value0.0830.11
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.0

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Pass


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value400349374399397446375278295275275267251229209195101
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome7.36.16.88.29.612.712.410.112.512.613.414.013.714.615.316.210.8

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:SpecialMention


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value2.3422.4032.629.1991012131111121415131312107.15
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.00.00.20.30.40.50.40.50.60.70.80.70.90.90.90.8

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Substandard


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value6.5926.0429.591109.0199.4259.1528.4377.8848.1868.5766.9746.5396.4666.1794.4414.986
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.10.10.20.20.20.30.30.30.30.40.40.40.40.40.40.40.5

us-gaap:ConsumerPortfolioSegment, us-gaap:Pass


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value151313131418181920161610109.4827.711107.234
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.30.20.20.30.40.50.60.70.90.80.80.50.60.60.60.80.8

us-gaap:ConsumerPortfolioSegment, us-gaap:SpecialMention


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.0050.0320.0340.0310.0280.030.0310.0380.020.3810.6811.2611.5891.6011.5631.8822.158
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.20.2

us-gaap:ConsumerPortfolioSegment, us-gaap:Substandard


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0060.0060.0120.0110.0190.0160.0230.0250.0530.050.0580.1870.1960.1460.146
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ResidentialPortfolioSegment, mbin:SpecialMentionCovid19


Loans
Period End2021-03-312020-12-31
Value0.1210.383
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.0

us-gaap:ResidentialPortfolioSegment, us-gaap:Pass


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value804727674568468417408404396404408398378355329307235
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome14.712.712.211.711.311.813.514.716.818.519.920.820.722.624.025.425.0

us-gaap:ResidentialPortfolioSegment, us-gaap:SpecialMention


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302016-12-31
Value0.8210.8330.8530.6930.7212.4132.4720.6740.6430.590.4430.3010.3060.5460.2090.214
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.00.00.00.00.10.10.00.00.00.00.00.00.00.00.0

us-gaap:ResidentialPortfolioSegment, us-gaap:Substandard


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.6292.7572.7612.8192.8272.413.1095.1615.0264.2551.6061.0481.0660.7280.7290.2460.343
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.00.00.10.10.10.10.20.20.20.10.10.10.00.10.00.0

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment, us-gaap:UnusualOrInfrequentItem

mbin:MultiFamilyAndHealthcareFinancingPortfolioSegment, us-gaap:SpecialMention, mbin:Covid19


Loans
Period End2021-06-302020-12-312020-09-302020-06-30
Value0.1850.1850.18548
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.00.01.2

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:SpecialMention, mbin:Covid19


Loans
Period End2020-12-312020-09-302020-06-30
Value0.110.61715
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.00.4

us-gaap:ResidentialPortfolioSegment, us-gaap:SpecialMention, mbin:Covid19


Loans
Period End2021-06-302020-12-312020-09-302020-06-30
Value0.0250.3830.1760.136
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.00.00.0

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome us-gaap:FinancingReceivablePortfolioSegment, us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

us-gaap:CommercialRealEstatePortfolioSegment, mbin:PaycheckProtectionProgramCaresAct


Loans
Period End2021-06-302021-03-312020-12-31
Value536560
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome1.01.11.1

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome us-gaap:InternalCreditAssessment

mbin:SpecialMentionCovid19


Loans
Period End2021-03-312020-12-31
Value0.390.678
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.00.0

us-gaap:Pass


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value5316559453674756402934582955268522882095195618411772153113511189926
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome97.197.597.097.597.098.297.697.597.096.095.196.196.697.398.398.498.4

us-gaap:SpecialMention


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1491351521074648605657739066523316149.522
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome2.72.42.82.21.11.42.02.02.43.44.43.52.92.11.21.21.0

us-gaap:Substandard


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value7.3858.9851416141412141313119.2679.3518.5557.3364.9695.532
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.10.20.30.30.30.40.40.50.60.60.50.50.50.50.50.40.6

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome us-gaap:InternalCreditAssessment, us-gaap:UnusualOrInfrequentItem

us-gaap:SpecialMention, mbin:Covid19