BXMT


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

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:GeneralAndAdministrativeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense
us-gaap:CreditFacility
us-gaap:LongtermDebtType
us-gaap:InterestExpenseDebt

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:Assets
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:ConsolidatedEntities, us-gaap:BalanceSheetLocation

us-gaap:Liabilities
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:BalanceSheetLocation

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:OtherAssets

us-gaap:LongTermDebt
us-gaap:LongtermDebtType

us-gaap:SecuredLongTermDebt
us-gaap:FairValueByMeasurementBasis

us-gaap:MinorityInterest

us-gaap:StockholdersEquity

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:MinorityInterest

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation
us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementEquityComponents
us-gaap:TitleOfIndividual, us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:Dividends

us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:StatementGeographical
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

bxmt:AdjustmentsToAdditionalPaidInCapitalDeferredCompensation
us-gaap:StatementEquityComponents

bxmt:AnnualDistributionOfNetTaxableIncomePercentage
us-gaap:CreditFacility
bxmt:AssetSpecificFinancingsGuaranteeValue

bxmt:CashContributionsFromJointVenturePartnersThatIncreaseEquity
us-gaap:StatementEquityComponents

bxmt:CommonStockDividendsDeclared

bxmt:ComputedManagementFeePercentOfAverageOutstandingEquityBalance

bxmt:CoreGeneralAndAdministrativeExpenses

bxmt:DebtInstrumentAmortizationPercentage
us-gaap:LongtermDebtType

bxmt:DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:CreditFacility
us-gaap:CreditFacility, us-gaap:VariableRate
us-gaap:CounterpartyName
bxmt:DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate
us-gaap:CounterpartyName, us-gaap:CreditFacility
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
bxmt:DerivativeCashPaymentOnHedge

bxmt:DividendsDeclaredAndNotPaid

bxmt:ExciseTaxRate

bxmt:GeneralAndAdministrativeOperatingAndOtherCosts

bxmt:IncentiveFeeComputationPercentOfAverageOutstandingEquityPerAnnum

bxmt:IncentiveFeeComputationPercentOfProductPerAgreement

bxmt:IncreaseDecreaseInCurrentExpectedCreditLossReserve

bxmt:InterestExpenseSecuredDebt
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty
bxmt:JointVentureManagementRelatedExpenses

bxmt:LoanPrincipalPaymentsHeldByServicer

bxmt:LoanRepaymentsAndSalesProceeds

bxmt:LoanRepaymentsAndSalesProceedsPrincipalBalance

bxmt:MortgageLoansOnRealEstateAmortizationOfDeferredFeesAndOtherItems

bxmt:MortgageLoansOnRealEstateDeferredFeesAndOtherItems

bxmt:MortgageLoansOnRealEstateDeferredFeesAndOtherItemsForeignCurrencyTranslationUnrealizedGainLoss

bxmt:MortgageLoansOnRealEstateFaceAmountOfMortgagesForeignCurrencyTranslationUnrealizedGainLoss

bxmt:MortgageLoansOnRealEstateForeignCurrencyTranslationUnrealizedGainLoss

bxmt:NetProceedsFromSecuredTermLoanBorrowings

bxmt:NetTaxableIncomeSubjectToDistributionPercent

bxmt:NonCashAndLegacyCompensationExpenses
bxmt:Amendment, us-gaap:TitleOfIndividual
bxmt:NoninterestExpenseDirectorsFeesPaidInCash
bxmt:Amendment, us-gaap:TitleOfIndividual, us-gaap:SubsequentEventType
us-gaap:TitleOfIndividual
bxmt:Amendment, us-gaap:TitleOfIndividual
bxmt:NoninterestExpenseDirectorsFeesPaidinkind
bxmt:Amendment, us-gaap:TitleOfIndividual, us-gaap:SubsequentEventType
us-gaap:TitleOfIndividual

bxmt:OtherComprehensiveIncomeRealizedAndUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

bxmt:PaymentsForCollateralDepositsRelatedToDerivatives

bxmt:PaymentsForDerivativeInstrumentsInInvestingActivities

bxmt:PercentageOfYieldInSubordinateRiskRetentionInterest

bxmt:ProceedsFromAssetSpecificDebtAgreements

bxmt:ProceedsFromCollateralDepositsRelatedToDerivatives

bxmt:ProceedsFromDerivativeInstrumentsInInvestingActivities

bxmt:ProceedsFromIssuanceOfCollateralizedLoanObligations

bxmt:RealisedGainsLossesOnDerivativeFinancialInstrumentsNet

bxmt:RepaymentsForCollateralizedLoanObligations

bxmt:RepaymentsOfSecuredTermLoans
us-gaap:Collateral, us-gaap:UnderlyingAssetClass, us-gaap:VariableRate
bxmt:SecuritizedDebtObligationsYieldRate
us-gaap:Collateral, us-gaap:VariableRate
us-gaap:FinancialInstrument, us-gaap:UnderlyingAssetClass, us-gaap:VariableRate
us-gaap:FinancialInstrument, us-gaap:VariableRate
us-gaap:StatementEquityComponents
bxmt:StockIssuedDuringPeriodSharesPricePerShare
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:VariableRate
bxmt:WeightedAverageCashCouponRate
us-gaap:Collateral, us-gaap:VariableRate
bxmt:WeightedAverageYieldCostRate
us-gaap:CreditFacility, us-gaap:VariableRate

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition
us-gaap:StatementEquityComponents
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:AdministrativeFeesExpense
us-gaap:CreditFacility
us-gaap:AmortizationOfDeferredCharges

us-gaap:AmortizationOfDeferredLoanOriginationFeesNet

us-gaap:AmortizationOfFinancingCostsAndDiscounts
us-gaap:LongtermDebtType

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect

us-gaap:CommonStockDividendsPerShareCashPaid
us-gaap:InvestmentType, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CostsAndExpensesRelatedParty
us-gaap:LongtermDebtType, us-gaap:StatementEquityComponents
us-gaap:DebtConversionOriginalDebtAmount1
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleConversionRatio1
us-gaap:Ownership
us-gaap:DebtInstrumentIncreaseDecreaseForPeriodNet

us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLossPeriodIncreaseDecrease
us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:GeographicDistribution

us-gaap:DeferredCompensationArrangementWithIndividualSharesIssued

us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

us-gaap:DifferenceBetweenReportedAmountAndReportingCurrencyDenominatedAmountValue

us-gaap:DividendsCommonStock
us-gaap:StatementEquityComponents

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents

us-gaap:FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:GeographicDistribution
us-gaap:GeographicDistribution
us-gaap:UnusualOrInfrequentItem
bxmt:CurrentExpectedCreditLoss, us-gaap:LoanRestructuringModification
us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2
us-gaap:LoanRestructuringModification
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:IncentiveFeeExpense

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:InterestAndDividendIncomeOperating
us-gaap:LongtermDebtType
us-gaap:InterestExpenseDebtExcludingAmortization
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityAverageOutstandingAmount
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityIncreaseDecreaseForPeriodNet

us-gaap:ManagementFeeExpense
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:MortgageLoansOnRealEstateNewMortgageLoans

us-gaap:NoninterestExpense
bxmt:Amendment, us-gaap:TitleOfIndividual
us-gaap:NoninterestExpenseDirectorsFees
bxmt:Amendment, us-gaap:TitleOfIndividual, us-gaap:SubsequentEventType
us-gaap:TitleOfIndividual

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:PaymentForManagementFee

us-gaap:PaymentsForProceedsFromLoansReceivable

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsToMinorityShareholders

us-gaap:ProceedsFromIssuanceOfCommonStock
us-gaap:StatementEquityComponents

us-gaap:ProceedsFromIssuanceOfSecuredDebt

us-gaap:ProceedsFromLoanOriginations1

us-gaap:ProceedsFromMinorityShareholders

us-gaap:ProceedsFromSaleAndCollectionOfLoansReceivable
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ProfessionalAndContractServicesExpense

us-gaap:ProfessionalFees

us-gaap:ProvisionForLoanLossesExpensed
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:VariableRate
us-gaap:ReceivableWithImputedInterestEffectiveYieldInterestRate

us-gaap:RepaymentsOfSecuredDebt

us-gaap:RestrictedStockExpense
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
us-gaap:AwardType, us-gaap:StatementEquityComponents
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesDividendReinvestmentPlan
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesIssuedForServices

us-gaap:StockIssuedDuringPeriodSharesNewIssues
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:StockIssuedDuringPeriodValueDividendReinvestmentPlan
us-gaap:StatementEquityComponents
us-gaap:RelatedPartyTransactionsByRelatedParty
bxmt:AccruedManagementAndIncentiveFeesPayable

bxmt:AssetSpecificDebtAgreementsNet
us-gaap:FairValueByMeasurementBasis

bxmt:AssetSpecificDebtGross
us-gaap:FairValueByMeasurementBasis
bxmt:AssetSpecificDebtNet

bxmt:AssetspecificDebtAgreementsGross

bxmt:AssetspecificDebtAgreementsNet
us-gaap:FairValueByMeasurementBasis
us-gaap:CreditDerivativesByContractType, us-gaap:VariableRate
bxmt:AverageCompoundedSecuredOvernightFinancingRate
us-gaap:Collateral
bxmt:BookValueCollateralOfGrossLoanForAssetSpecificFinancingAgreements
us-gaap:CreditFacility

bxmt:CommonStockSharesOutstandingIncludingStockEquivalents

bxmt:CreditSpreadAdjustment
us-gaap:CreditDerivativesByContractType, us-gaap:VariableRate
bxmt:CreditSpreadAdjustmentRate
us-gaap:CreditDerivativesByContractType, us-gaap:VariableRate
bxmt:DailyCompoundedSterlingOvernightInterbankAverageRate
us-gaap:LongtermDebtType
bxmt:DebtInstrumentGrossFinancingAmount
bxmt:OtherCurrencies, us-gaap:Range, us-gaap:CreditFacility
bxmt:DebtInstrumentRangeOfRecourseLimitation
us-gaap:Currency, us-gaap:Range, us-gaap:CreditFacility
us-gaap:Range, us-gaap:CreditFacility
bxmt:TypesOfInterestRates, us-gaap:CreditFacility
bxmt:DebtInstrumentWeightedAverageAllInCost
us-gaap:CreditFacility
bxmt:TypesOfInterestRates, us-gaap:CreditFacility
bxmt:DebtInstrumentWeightedAverageAllInYield
us-gaap:CreditFacility
bxmt:OtherCurrencies, us-gaap:CreditFacility
bxmt:DebtInstrumentWeightedAverageRecourseLimitation
us-gaap:CreditFacility
us-gaap:Currency, us-gaap:CreditFacility
us-gaap:LongtermDebtType
bxmt:DebtinstrumentGrossFinancingamount
us-gaap:StatementEquityComponents
bxmt:DeferredStockUnits
bxmt:IndexRateFloor
bxmt:FloorRatePercentageOnLoanPortfolio
bxmt:IndexRateFloor, us-gaap:Range

bxmt:HeldToMaturitySecuritiesFaceAmount
us-gaap:FairValueByMeasurementBasis

bxmt:HeldToMaturitySecuritiesNet
bxmt:UsGaapUnderlyingAssetClass
bxmt:UsgaapunderlyingAssetClass

bxmt:LoanExposureAmountIncludingNonConsolidatedSeniorInterests

bxmt:LoanPortfolioPaymentsHeldByOurThirdPartyLoanServicer

bxmt:LoansExposureAmount
us-gaap:InternalCreditAssessment
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:StatementGeographical
us-gaap:UnusualOrInfrequentItem
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
bxmt:LoansOutstandingWithUnfundedCommitments
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:MeasurementInputType
bxmt:LoansReceivableMeasurementInput

bxmt:MortgageLoansOnRealEstateAccountedForUnderCostRecoveryMethod

bxmt:MortgageLoansOnRealEstatePercentageOfLoanPortfolio
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty
us-gaap:MortgageLoansOnRealEstateLoanType
us-gaap:StatementGeographical

bxmt:MortgageLoansOnRealEstatesDeferredFeesAndOtherItems

bxmt:NonconsolidatedSecuritizedDebtExcludedFromContractualObligations

bxmt:NonconsolidatedSeniorInterestsExcludedFromContractualObligations
bxmt:OtherCurrencies, us-gaap:CreditFacility
bxmt:NumberOfLoansCount
us-gaap:CreditFacility
us-gaap:Currency, us-gaap:CreditFacility
us-gaap:VariableRate
bxmt:OneMonthUsdLiborReferenceRate
us-gaap:Ownership
bxmt:PercentageOfSeniorLoanBorrowedOverMortgageLoansOnRealEstateFaceAmountOfMortgages
us-gaap:InvestmentType, us-gaap:RelatedPartyTransactionsByRelatedParty
bxmt:PercentageOfTotalSecuredTermLoans
us-gaap:Collateral
bxmt:PrincipalCollateralOfGrossLoanForAssetSpecificFinancingAgreements
us-gaap:CreditFacility
us-gaap:CreditFacility
bxmt:SecuredDebtFinancingAgreements

bxmt:SecuredDebtRepurchaseAgreementsFaceAmount
us-gaap:CreditFacility

bxmt:SecuredDebtRepurchaseAgreementsGross
us-gaap:Collateral
bxmt:SecuritizedDebtObligationCarryingValue
us-gaap:Collateral, us-gaap:UnderlyingAssetClass
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:UnderlyingAssetClass
us-gaap:Collateral
bxmt:SecuritizedDebtObligations
us-gaap:Collateral, us-gaap:UnderlyingAssetClass
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:UnderlyingAssetClass

bxmt:SecuritizedDebtObligationsExcludedFromContractualObligations

bxmt:SecuritizedDebtObligationsNet
us-gaap:FairValueByMeasurementBasis

bxmt:SecuritizedDebtObligationsNetFaceAmount

bxmt:SharesIssuedWeightedAveragePricePerShare
us-gaap:TitleOfIndividual, us-gaap:StatementClassOfStock

bxmt:StockIssuedDuringPeriodSharesWeightedAveragePricePerShare

bxmt:TaxBasisOfMortgageLoans

bxmt:TermLoansNet
us-gaap:VariableRate
bxmt:ThirtyDayAverageCompoundedSOFRReferenceRate
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
bxmt:UnfundedCommitmentsMaximumAdvanceAmount
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
bxmt:UnfundedCommitmentsRelatedToLoansReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:ConsolidatedEntities, us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
bxmt:VariableInterestEntityConsolidatedCarryingAmountAssetsNet
us-gaap:ConsolidatedEntities, us-gaap:BalanceSheetLocation
bxmt:VariableInterestEntityConsolidatedCarryingAmountCurrentExpectedCreditLossReserve
bxmt:IndexRateFloor
bxmt:WeightedAverageIndexRateFloorRatePercentageOnLoanPortfolio

bxmt:WeightedAverageRiskRatingOnLoanExposure

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages
bxmt:IndexRateFloor
bxmt:IndexRateFloor, bxmt:OtherCurrency
bxmt:IndexRateFloor, us-gaap:Currency
bxmt:OtherCurrency
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:Currency
us-gaap:MajorCustomers, us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:StatementGeographical
us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory
us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:StatementGeographical
us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty

srt:MortgageLoansOnRealEstatePriorLiens1
us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory

us-gaap:AccountsPayableAndOtherAccruedLiabilities

us-gaap:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

us-gaap:AllowanceForLoanAndLeaseLossesRealEstate

us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:CollateralAlreadyPostedAggregateFairValue
us-gaap:PlanName
us-gaap:CommonStockCapitalSharesReservedForFutureIssuance
us-gaap:FairValueByMeasurementBasis
us-gaap:ConvertibleDebtFairValueDisclosures

us-gaap:ConvertibleNotesPayable
us-gaap:LongtermDebtType

us-gaap:DebtInstrumentCollateralAmount
bxmt:OtherCurrencies, us-gaap:CreditFacility
bxmt:TypesOfInterestRates, us-gaap:CreditFacility
us-gaap:CounterpartyName, us-gaap:CreditFacility
us-gaap:CreditFacility
us-gaap:Currency, us-gaap:CreditFacility
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount
us-gaap:FairValueByMeasurementBasis
us-gaap:DebtInstrumentFairValue
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscount
us-gaap:InvestmentType, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:DebtSecurities

us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLoss
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:GeographicDistribution
bxmt:TypesOfInterestRates, us-gaap:CreditFacility
us-gaap:DebtWeightedAverageInterestRate
us-gaap:CreditFacility
us-gaap:LongtermDebtType
us-gaap:DeferredFinanceCostsGross

us-gaap:DeferredFinanceCostsNet
us-gaap:LongtermDebtType

us-gaap:DerivativeAssets
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:HedgingDesignation
us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:VariableRate
us-gaap:DerivativeCapInterestRate

us-gaap:DerivativeLiabilities
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:HedgingDesignation
us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeNotionalAmount
us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:VariableRate
us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:StatementGeographical, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeNumberOfInstrumentsHeld

us-gaap:DividendsPayableCurrentAndNoncurrent

us-gaap:DueToRelatedPartiesCurrentAndNoncurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EscrowDeposit

us-gaap:FinancingReceivableAllowanceForCreditLosses
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:GeographicDistribution
us-gaap:GeographicDistribution
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:InternalCreditAssessment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:InternalCreditAssessment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableOriginatedInCurrentFiscalYear
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:InternalCreditAssessment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:InternalCreditAssessment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:InternalCreditAssessment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:InternalCreditAssessment

us-gaap:HeldToMaturitySecurities

us-gaap:InterestPayableCurrentAndNoncurrent
us-gaap:LongtermDebtType

us-gaap:InterestReceivable
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:LimitedLiabilityCompanyLlcMembersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:LineOfCredit
bxmt:OtherCurrencies, us-gaap:CreditFacility
bxmt:TypesOfInterestRates, us-gaap:CreditFacility
us-gaap:CounterpartyName
us-gaap:CounterpartyName, us-gaap:CreditFacility
us-gaap:CreditFacility
us-gaap:CreditFacility, us-gaap:VariableRate
us-gaap:Currency, us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity
us-gaap:CounterpartyName, us-gaap:CreditFacility
us-gaap:CreditFacility
us-gaap:CreditFacility, us-gaap:VariableRate
us-gaap:CreditFacility, us-gaap:LineOfCreditFacility
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity
us-gaap:CounterpartyName, us-gaap:CreditFacility
us-gaap:CreditFacility
bxmt:TypesOfInterestRates, us-gaap:CreditFacility
us-gaap:LinesOfCreditCurrent
us-gaap:CreditFacility
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:LoansAndLeasesReceivableGrossCarryingAmount

us-gaap:LoansReceivableFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:LongTermDebtMaturingInYearsFourAndFive
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturingInYearsTwoAndThree
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
us-gaap:LongtermDebtType
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:MembersEquity
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:MembersEquityAttributableToNoncontrollingInterest
us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners

us-gaap:MortgageLoansOnRealEstate
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:InternalCreditAssessment
us-gaap:InternalCreditAssessment
us-gaap:MajorCustomers, us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:StatementGeographical
us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory
us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:StatementGeographical
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty
us-gaap:MortgageLoansOnRealEstateLoanType
us-gaap:StatementGeographical

us-gaap:MortgageLoansOnRealEstateCommercialAndConsumerNet
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:UnusualOrInfrequentItem

us-gaap:NotesReceivableGross

us-gaap:OtherAssetsMiscellaneous

us-gaap:OtherLiabilities

us-gaap:PrepaidExpenseCurrentAndNoncurrent

us-gaap:PrepaidTaxes
us-gaap:UnderlyingAssetClass
us-gaap:PrincipalAmountOutstandingOnLoansSecuritized

us-gaap:RestrictedCash
us-gaap:DebtInstrument

us-gaap:SecuredDebt
us-gaap:LongtermDebtType

us-gaap:SecuredDebtRepurchaseAgreements
us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:SeniorLongTermNotes

us-gaap:ServicingLiability
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementEquityComponents
us-gaap:AwardType, us-gaap:Vesting
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:LongtermDebtType
us-gaap:SharePrice
us-gaap:StatementEquityComponents
us-gaap:SharesIssuedPricePerShare
us-gaap:UnderlyingAssetClass
us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Allocated Share Based Compensation Expense
Balance Sheet
Cash And Cash Equivalents At Carrying Value
Assets
Derivative Assets
Current Assets
Cash And Cash Equivalents At Carrying Value
Liabilities
Derivative Liabilities
Noncurrent Liabilities
Minority Interest
Stockholders Equity
Retained Earnings Accumulated Deficit
Per Share
Common Stock Dividends Per Share Cash Paid
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Share Based Compensation

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:CommonStockValue █████▆▆▆▆▅▅▄▃▃▃▁▁▁▁▁1.471.471.4681.4621.4621.3541.351.3431.3431.2571.2341.1971.1141.0821.0790.9480.9480.9480.9450.939NANA0.937NANA0.5850.5830.5720.4790.3870.2880.2880.2880.2930.2930.2250.225NA0.222NANANANANANA
us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted █▁147.342822147.336936NA146.484651138.299418135.619264NA134.536683126.475244124.333048NA116.20314109.069078108.397598NA95.01308795.00587394.993386NA94.07153794.06442394.067769NA93.3579680.94053558.576025NA49.21120547.97781337.967365NA28.89451512.4012743.016425NANANANANANANANANANANA
us-gaap:EarningsPerShareBasicAndDiluted █▇▇▇▅▃▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▇▆▆▇▆▆▆▆▁0.890.540.570.610.13-0.390.590.560.590.620.610.670.660.560.590.610.530.540.570.690.670.610.70.720.360.60.370.450.70.340.280.290.22-1.03NANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:AllocatedShareBasedCompensationExpense ▄▄▄▄▄▄▄▄▄▄▄▄▄▄0.1250.1250.1250.1250.1250.1250.1250.1250.1250.1250.1250.1250.1250.125NANANANANANANANANANANA0.0940.0940.0940.0940.0940.0940.0940.0370.0380.6780.4650.0810.1290.0940.094NANANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▅▃▄▄▂▁▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▄▂▂▃▁▂▁█131.05480.01685.14190.588.221-18.86996.09370.92376.5180.03172.26977.45262.07968.76160.54665.86862.46255.2543.56360.54854.38456.3660.09558.63141.70818.66112.67113.09235.3613.1017.8778.322.748-3.115107.9679.3044.06670.383-10.40914.990.174262.726NANANA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest ▇▅▇██▁▆▄▃▃▂▁▂▂▂▁0.8730.6380.8070.9090.9610.0670.650.4970.3770.3020.2540.1280.1950.1580.2490.088NANA0.0241.5986.3690.1520.3320.893.13310.73.8471.5774.9730.0512.6492.2064.021.51817.7425.9011.06874.079-7.95-5.4668.068-0.668NANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▅▃▄▄▂▁▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▅▂▂▅▁▂▂█131.92780.65485.94891.4899.182-18.80296.74371.4276.88780.33372.52377.5862.27468.91960.79565.95662.46255.2543.58762.14660.75356.51260.42759.52144.84129.36116.51814.66940.33313.15210.52610.5266.768-1.597125.70915.2055.134144.462-18.3599.5248.242262.058NANANA
us-gaap:GeneralAndAdministrativeExpense ▆▆▇▇▇▇▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▅▆▅█▅▅▄█▄▄▄▄▄▁▅▄▄▄▅▄▆▄▅▄10.66910.59711.55111.24211.28611.7919.9039.7419.8979.3139.6328.4438.7478.7087.7037.4197.3737.4286.7267.4146.7816.7958.0545.29515.6987.6635.8793.36815.3563.1991.9934.0483.4272.038-5.8247.1414.744.3123.9994.9414.64910.284.4015.1484.509
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▆▅▅▅▄▂▅▅▅▅▅▅▅▅▄▄▄▄▄▅▅▄▅▅▄▄▄▄▄▄▄▄▄▃▆▄▃▆▃▄▄█▄▁▃132.64380.64184.55490.78918.528-53.13479.64974.67375.59776.96873.93278.34172.61161.23658.18857.89350.70751.49453.31566.58669.29657.4465.6767.85932.52246.33825.44323.48338.43713.64710.39410.2627.322-1.559123.73113.6173.494141.545-14.7488.027.285254.30611.166-134.1532.902
us-gaap:IncomeTaxExpenseBenefit ▅▅▅▅▅▅▅▃▅▅▅▅▅▅▅▅▅▅▅▅▄▅▅▅▅▅▅▅▅▆▆▄▆▅▁▇▅▇█▄▇▆█▆0.1750.1010.1310.020.0230.1490.067-0.7210.0460.1010.0360.0480.1040.120.0490.0830.0940.089-0.0850.194-0.1540.2410.0730.0810.1050.2450.106-0.118-0.0020.5310.666-0.2640.5540.038-1.6090.7170.1430.9231.332-0.2361.0610.3891.2510.556NA
us-gaap:IncomeTaxesPaidNet ▃▃▃▃▃▃▂▃▃▃▃▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃█▃▃▁▃▃▄▃▆▂▃▅▇▆0.123-0.2640.086-0.0020.0260.122-0.3140.1060.0250.0740.0080.2830.1280.1350.0760.0790.0910.050.155-0.0730.0530.1510.0-0.001-0.0030.1292.871-0.2390.001-1.16-0.226-0.1920.3720.0381.912-0.312-0.11.22.41.99NANANANANA
us-gaap:InterestExpense ▆▆▆▆▆▇████▇▇▆▅▅▅▄▄▄▄▄▄▄▄▃▂▂▂▂▂▂▁▁▁▁▁▁▂▂▂▃▃▃▃▃82.35278.37279.40178.97884.853104.239110.967111.957116.891118.688103.94897.95587.73369.98965.95367.89154.35246.67444.45145.37349.06545.38146.29151.32930.63424.16121.44619.90315.7212.07411.5254.4071.3060.7774.2365.1475.41323.34216.59321.83832.29626.24729.50131.55731.653
 us-gaap:InterestExpenseDebt us-gaap:LongtermDebtType bxmt:ConvertibleSeniorNote▅▅▅▅▅▅▅▅▅▅▇██▅▅▅▃▁▁▁▁7.8847.8677.8637.8467.8437.8267.8217.8077.8037.7879.81510.81210.487.9727.6987.4495.1762.9772.9622.9552.941NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestIncomeExpenseNet █████▇█▇█▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▄▄▄▃▃▃▂▂▂▂▂▂▂▁▂▂▂▂▂▂▂113.951109.152109.45114.961107.129100.636109.711101.916106.478106.071102.15105.152103.74685.43680.17478.55572.47371.84371.83782.81781.40677.64482.09487.03249.84739.24636.81230.48326.74621.58215.31214.4464.7110.6792.281.7971.35-8.6265.3823.8040.25810.7449.518.7237.872
us-gaap:InterestPaidNet ▃▃▃▃▄▆▇▇██▆▅▅▁▃▁73.19167.4169.52969.52481.69991.341101.788104.44111.602107.97194.59985.86982.86955.58265.84252.605NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▆▅▅▅▄▂▅▅▅▅▅▅▅▅▄▄▄▄▄▅▅▄▅▅▄▄▄▄▄▄▄▄▃▃▅▄▃▅▃▄▃█▄▁▃131.59579.90283.61689.8617.544-53.3578.93174.89775.17476.56573.64378.16572.31260.95857.89157.72250.61351.40553.37564.79463.08157.04765.26466.88829.28435.39321.4922.02433.46613.0657.0798.322.748-3.115105.1896.9992.28366.553-8.3213.722-1.845254.5859.915-134.7092.902
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▇▅▇██▁▆▄▃▃▂▁▂▂▂▁0.8730.6380.8070.9090.9610.0670.650.4970.3770.3020.2540.1280.1950.1580.2490.088NANA0.0241.5986.3690.1520.3320.893.13310.73.8471.5774.9730.0512.6492.2064.021.51817.7425.9011.06874.069-7.758-5.4668.069-0.668NANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▃▃▃▃▂█▆▃▃▄▃▃▂▄▄▄▅▄▂▃▂▃▃▂▅▁▂▂▄▃-0.5410.1141.5250.72-9.32334.48117.161-3.9741.3363.466-1.373-0.713-10.2337.8032.6568.14611.8493.845-9.813-4.246-8.697-0.687-5.17-8.25612.424-16.732-8.819-8.9331.8940.036NANANANA2.7782.3051.7833.84-2.2791.2682.018NANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▁█-0.5410.114NA0.72-9.32334.481NA-3.9741.3363.466-1.373-0.713-10.2337.8032.6568.14611.8493.845-9.813-4.246-8.698-0.687-5.17-8.25612.424-16.732-8.819-8.9331.8940.036NANANANA2.7782.3051.7823.83-2.0871.268NANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:Parent▁█-0.5410.114NA0.72-9.32334.481NA-3.9741.3363.466-1.373-0.713-10.2337.8032.6568.14611.8493.845-9.813-4.246-8.698-0.687-5.17-8.25612.424-16.732-8.819-8.9331.8940.036NANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▆▅▅▅▄▂▅▅▅▅▅▅▅▅▄▄▄▄▄▅▅▄▅▅▄▄▄▄▄▄▄▄▄▃▆▄▃▆▃▄▄█▄▁▃132.46880.5484.42390.76918.505-53.28379.58175.39475.55176.86773.89678.29372.50761.11658.1457.8150.61351.40553.39966.39269.4557.19965.59767.77832.41746.09325.33823.60138.43913.1169.72810.5266.768-1.597122.93112.93.351140.622-16.0788.2566.224253.9179.915-134.7092.902
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:Assets ██████▇▇▇▇▇▆▆▅▅▅▅▄▄▄▅▅▅▅▅▃▃▃▂▂▂▁▁▁▁▁▁▁▁▁▂17901.74717354.7116958.95516876.80417663.12316758.08916551.87115082.41614565.00414796.2214467.37512419.47512382.34711211.2910258.8259776.9179719.0888954.6598812.6158510.9419488.4619554.7669376.5739851.86810466.0615085.6984588.5214098.4733754.7692894.3872212.781577.311087.105365.153322.343581.197584.237605.5581366.3161539.8892365.4NA4120.69NANA
us-gaap:Liabilities ██████▇▇▆▇▇▆▆▅▅▅▅▄▄▄▄▄▄▅▅▃▂▂▂▂▂▁▁▁▁▁▁▁▂▂▂13944.79213450.61713054.72412972.85213767.33913083.66212767.1911321.79910788.57911344.63111092.7689111.4829353.6858284.7797341.4197251.1257212.6156458.6776319.0126006.1436979.3677052.9336870.8427351.7067970.5743583.03087.6352588.6142472.7441885.9871456.03773.768285.438202.708168.89543.231561.997588.561495.2551650.7422481.57NA4531.877NANA
us-gaap:LiabilitiesAndStockholdersEquity ██████▇▇▇▇▇▆▆▅▅▅▅▄▄▄▅▅▅▅▅▃▃▃▂▂▂▁▁▁▁▁▁▁▁▁▂17901.74717354.7116958.95516876.80417663.12316758.08916551.87115082.41614565.00414796.2214467.37512419.47512382.34711211.2910258.8259776.9179719.0888954.6598812.6158510.9419488.4619554.7669376.5739851.86810466.0615085.6984588.5214098.4733754.7692894.3872212.781577.311087.105365.153322.343581.197584.237605.5581366.3161539.8892365.4NA4120.69NANA
us-gaap:StockholdersEquity █████▇▇▇▇▆▅▅▃▃▃▁3930.9613883.0233886.0673883.3643874.7633650.923762.5833742.7933747.3633439.3983364.1243300.7723023.482921.2132911.0662519.614NANA2493.6032503.6942496.4172495.4172492.5882487.1252483.1241456.9351465.3711477.7391239.308970.083717.909713.327712.68976.09573.444-24.559-34.385-38.566-110.424-100.165-110.947-124.334-411.187NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:CashAndCashEquivalentsAtCarryingValue ▃▃▃▃█▃▂▁▁▁▂▁▂▁▁▁▁▁▁▁▂▂▁▂▂▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁289.552280.126289.97427.0281259.836355.018150.0984.28980.58479.437105.66286.987107.05757.39669.65461.22133.52164.27575.56794.061181.796110.62296.45138.6104.25218.47451.8163.343120.45670.83452.34210.28359.74615.36115.42338.86734.60437.19834.81828.21928.4327.77924.44924.14926.495
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▃▂▂▃█▃▁▁339.552280.126289.97427.0281259.836355.018150.0984.289NA79.437105.66286.987107.05774.478102.51894.08567.79964.27575.56794.938182.272NA106.006NANANA63.401NANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:LongTermDebt ▇▇▆▇█▇█▆▅▆▅▂▃▁11007.52210463.2369981.82810688.22811407.08610734.77611453.3169937.8169406.1139857.8659618.9817657.0847839.3786813.67NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:SecuredLongTermDebt █▇▆▆▆▃▃▁▁1356.141259.5751062.7661065.4511068.134745.006746.878498.75500.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:MinorityInterest ▇▆▅▆▆▆▆▅█▃▃▂▁▁▁25.99421.0718.16420.58821.02123.50722.09817.82429.06212.19110.4837.2215.1825.2986.34NANANANA1.10412.6776.41613.14313.03712.36345.76335.51532.1242.71738.31738.84190.21588.97886.3580.00962.52556.62555.564-18.515NANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:StockholdersEquity █████▇▇▇▇▆▅▅▃▃▃▁3930.9613883.0233886.0673883.3643874.7633650.923762.5833742.7933747.3633439.3983364.1243300.7723023.482921.2132911.0662519.614NANA2493.6032503.6942496.4172495.4172492.5882487.1252483.1241456.9351465.3711477.7391239.308970.083717.909713.327712.68976.09573.444-24.559-34.385-38.566-110.424-100.165-110.947-124.334-411.187NANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest █████████▇▇▇▆▆▆▆▆▅▅▆▆▆▆▆▅▄▄▄▃▃▃▃▃▁▁▁▁▁▁▁▁3956.9553904.0933904.2313903.9523895.7843674.4273784.6813760.6173776.4253451.5893374.6073307.9933028.6622926.5112917.4062525.7922506.4732495.9822493.6032504.7982509.0942501.8332505.7312500.1622495.4871502.6981500.8861509.8591282.0251008.4756.75803.542801.667162.445153.45337.96622.2416.998-128.939-110.853-116.17NA-411.187-426.651-293.66
us-gaap:CommonStockValue █████▆▆▆▆▅▅▄▃▃▃▁▁▁▁▁1.471.471.4681.4621.4621.3541.351.3431.3431.2571.2341.1971.1141.0821.0790.9480.9480.9480.9450.939NANA0.937NANA0.5850.5830.5720.4790.3870.2880.2880.2880.2930.2930.2250.225NA0.222NANANANANANA
us-gaap:AdditionalPaidInCapitalCommonStock █████▇▇▇▇▇▇▇▆▆▆▅▅▅▅▅▅▅▅▅▅▃▃▃▃▃▂▂▂▁▁▁▁4719.2034710.9864702.7134693.9824685.1594378.8514370.0144362.4764354.5714039.8053966.543898.8413624.7673515.4183506.8613109.0943102.9293096.0063089.9973084.9483079.9033074.9753070.23066.6623063.4292030.762027.4042022.0931767.9541510.861252.9861242.9861242.892609.04609.002597.866597.344NA597.049NANANANANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▂▁▁▁▁▃▇▇▇▇▇▇▇▇▇▇▇██████▇▇██████████▇▆▆▅▅▅-800.455-840.717-829.284-821.725-820.783-747.533-592.548-587.632-579.131-570.908-569.428-566.417-570.265-573.384-567.168-558.066-556.896-548.615-541.137-535.804-542.282-547.052-545.791-552.881-561.905-542.654-547.592-538.726-531.858-542.004-536.17-529.947-530.491-533.238-535.851-591.276-598.275-600.558-667.111-658.789-667.615NA-920.355NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▇▇▇▇▇█▅▃▄▃▃▃▃▄▃▃▂▁▁▂▂▃▃▄▄▃▅▆▇▆▆▆▆▆10.74311.28411.179.6458.92518.248-16.233-33.394-29.42-30.756-34.222-32.849-32.136-21.903-29.706-32.362-40.508-52.357-56.202-46.389-42.143-33.445-32.758-27.588-19.332-31.756-15.024-6.2052.7280.8340.7980.00.00.0NA-31.374-33.679-35.461-40.584-38.497-40.303NA-50.462NANA
us-gaap:MinorityInterest ▇▆▅▆▆▆▆▅█▃▃▂▁▁▁25.99421.0718.16420.58821.02123.50722.09817.82429.06212.19110.4837.2215.1825.2986.34NANANANA1.10412.6776.41613.14313.03712.36345.76335.51532.1242.71738.31738.84190.21588.97886.3580.00962.52556.62555.564-18.515NANANANANANA
us-gaap:StockIssuedDuringPeriodValueNewIssues NA0.002NANA297.5990.004NANA306.95265.381106.64267.292102.4950.003391.5650.00.00.0030.0060.00.00.0020.005-0.0221029.5550.0022.736252.562254.752256.093-0.0030.0NANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:CommonStockNA0.002NANA0.1080.004NANA0.0860.0230.0370.0830.0320.0030.1310.00.00.0030.0060.00.00.0020.005NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:ParentNA0.002NANA297.5990.004NANA306.95265.381106.64267.292102.4950.003391.5650.00.00.0030.0060.00.00.0020.005-0.0221029.5550.0022.736252.562254.752256.093-0.0030.0NANANANANANANANANANANANANA
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders ▁█10.69411.18NA1.6653.4476.681NA19.8280.6640.0641.8070.1142.4111.575NANANANA1.12813.1710.1086.8790.2260.21736.5330.4520.45212.1750.5730.57554.023NANA-1.4120.2580.001NANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▅▄▅█▃▄▄▅▄▃▆▂▄▁▃82.32583.04875.31185.588107.09168.61775.44671.40779.61277.57267.26787.72462.43272.57950.92265.726NANANANANANANANANANANANANANA14.2475.8437.8460.756-4.835.095.231.2788.7356.8978.1744.2658.2058.002NA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▆▇█▇▆▄▅█▆▁▇▄▄▆▇-401.381-523.59117.475129.00214.538-249.266-1202.53-578.193243.021-333.446-2040.19-57.211-1186.763-967.495-461.06526.34NANANANANANANANANANANANANANA-1586.797471.775-670.1312.66263.55220.4830.244105.322147.442234.8531477.416234.50790.202129.567NA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▄▃▁▅▄▆▅▃▄█▃▆▅▄▃374.425431.693-231.547-1048.994780.695389.0771193.002511.384-321.512229.6781992.749-51.6871158.97857.676417.642-67.067NANANANANANANANANANANANANANA614.609472.918706.671-3.48-82.166-21.31-8.068-104.22-149.578-241.961-1484.939-235.442-98.107-139.915NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▅▄▅█▃▄▄▅▄▃▆▂▄▁▃82.32583.04875.31185.588107.09168.61775.44671.40779.61277.57267.26787.72462.43272.57950.92265.726NANANANANANANANANANANANANANA14.2475.8437.8460.756-4.835.095.231.2788.7356.8978.1744.2658.2058.002NA
us-gaap:NetIncomeLoss ▆▅▅▅▄▂▅▅▅▅▅▅▅▅▄▄▄▄▄▅▅▄▅▅▄▄▄▄▄▄▄▄▃▃▅▄▃▅▃▄▃█▄▁▃131.59579.90283.61689.8617.544-53.3578.93174.89775.17476.56573.64378.16572.31260.95857.89157.72250.61351.40553.37564.79463.08157.04765.26466.88829.28435.39321.4922.02433.46613.0657.0798.322.748-3.115105.1896.9992.28366.553-8.3213.722-1.845254.5859.915-134.7092.902
us-gaap:ProfitLoss ▆▅▅▅▄▂▅▅▅▅▅▅▅▅▄▄▄▄▄▅▅▄▅▅▄▄▄▄▄▄▄▄▄▃▆▄▃▆▃▄▄█▄▁▃132.46880.5484.42390.76918.505-53.28379.58175.39475.55176.86773.89678.29372.50761.11658.1457.8150.61351.40553.39966.39269.4557.19965.59767.77832.41746.09325.33823.60138.43913.1169.72810.5266.768-1.597122.93112.93.351140.622-16.0788.2566.224253.9179.915-134.7092.902
us-gaap:ShareBasedCompensation ▇█████▇▇▇▇▇▆▆▇▆▆▆▆▅▆▅▅▆▄▅▆▃▃▃▃▄▁▁▂▂▁▁▁▁▁▁▁▁▁8.028.0858.5548.6498.6518.6787.387.7547.7547.7687.6666.7346.7786.9766.2225.9435.9595.9075.3826.2025.4634.8526.2473.2865.086.1042.8922.0552.7991.974.1040.5520.5851.0010.6780.4650.0810.1290.0940.0940.0940.2230.0310.031NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▆▇█▇▆▄▅█▆▁▇▄▄▆▇-401.381-523.59117.475129.00214.538-249.266-1202.53-578.193243.021-333.446-2040.19-57.211-1186.763-967.495-461.06526.34NANANANANANANANANANANANANANA-1586.797471.775-670.1312.66263.55220.4830.244105.322147.442234.8531477.416234.50790.202129.567NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▄▃▁▅▄▆▅▃▄█▃▆▅▄▃374.425431.693-231.547-1048.994780.695389.0771193.002511.384-321.512229.6781992.749-51.6871158.97857.676417.642-67.067NANANANANANANANANANANANANANA614.609472.918706.671-3.48-82.166-21.31-8.068-104.22-149.578-241.961-1484.939-235.442-98.107-139.915NA
us-gaap:PaymentsOfDividendsCommonStock ████▇▇▇▇▇▇▆▆▆▆▅▅▅▅▅▅▅▅▅▄▃▃▂▂▂▁91.15991.00490.64390.64183.92183.70283.25983.25977.91376.5374.19569.09767.0866.88858.79458.79358.78758.61558.22658.22658.22658.09757.848.48330.39530.328.83923.2718.85313.276NANANANANANANANANANANANANANANA
us-gaap:Dividends NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:DebtInstrumentInterestRateStatedPercentage NANA5.150000000000001e-06NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA1.7899999999999998e-08NANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory,us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty,us-gaap:StatementGeographical bxmt:SeniorMortgageLoansLessThanThreePercentageOfCarryingAmountOfLoans,srt:OfficeBuilding,bxmt:DiversifiedLocationNANA4.46e-06NANANA4.46e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory,us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty,us-gaap:StatementGeographical us-gaap:SecondMortgage,bxmt:Various,bxmt:DiversifiedLocationNANA5.75e-06NANANA5.74e-08NANANA5.7500000000000005e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1.471.471.4681.4621.4621.3541.351.3431.3431.2571.2341.1971.1141.0821.0790.9480.9480.9480.9450.9390.9370.5850.5830.5720.4790.3870.2880.2880.2880.2930.2930.2250.2250.222
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.00.00.0

Weighted Average Number Of Share Outstanding Basic And Diluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value14714714613813513412612411610910895959494949493805849473728123.016425
Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.890.540.570.610.13-0.390.590.560.590.620.610.670.660.560.590.610.530.540.570.690.670.610.70.720.360.60.370.450.70.340.280.290.22-1.03
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.094000.094000.094000.094000.094000.094000.094000.037000.038000.0678000.0465000.081000.0129000.094000.094000.0
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.30.40.50.62.610.46.71.20.90.40.4

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1318085908.221-18.8699670768072776268606562554360545660584118121335137.8778.322.748-3.1151079.3044.06670-10.409140.174262
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating66.842.745.146.74.3-9.243.533.234.335.635.138.132.444.241.445.049.346.637.547.241.745.846.842.451.829.421.726.083.338.929.444.145.7-213.91656.7134.060.1478.3-47.458.50.5710.2

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.8730.6380.8070.9090.9610.0670.650.4970.3770.3020.2540.1280.1950.1580.2490.0880.0241.5986.3690.1520.3320.893.133103.8471.5774.9730.0512.6492.2064.021.518175.9011.06874-7.95-5.4668.068-0.668
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.40.30.40.50.50.00.30.20.20.10.10.10.10.10.20.10.01.24.90.10.30.63.916.96.63.111.70.29.911.766.8104.3272.285.015.8503.4-36.2-21.324.8-1.8

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1318085919.182-18.80296717680727762686065625543626056605944291614401310106.768-1.597125155.134144-18.3599.5248.242262
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating67.243.045.547.24.8-9.243.833.434.435.735.238.232.544.341.645.049.346.637.548.546.645.947.143.055.746.328.429.195.039.139.255.8112.5-109.71928.9219.075.9981.7-83.537.125.3708.4

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1010111111119.9039.7419.8979.3139.6328.4438.7478.7087.7037.4197.3737.4286.7267.4146.7816.7958.0545.295157.6635.8793.368153.1991.9934.0483.4272.038-5.8247.1414.744.3123.9994.9414.649104.4015.1484.509
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating5.45.76.15.85.95.84.54.64.44.14.74.24.65.65.35.15.86.35.85.85.25.56.33.819.512.110.16.736.29.57.421.557.0140.0-89.4102.870.129.318.219.314.327.811.312.811.4

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value13280849018-53.13479747576737872615857505153666957656732462523381310107.322-1.559123133.494141-14.7488.027.28525411-134.1532.902
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating67.643.044.846.89.7-25.936.134.933.834.235.938.637.939.439.839.540.043.445.851.953.146.751.249.040.473.143.746.690.540.538.754.4121.7-107.11898.6196.151.7961.8-67.131.322.4687.528.6-333.17.3

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value175000.0101000.0131000.020000.023000.0149000.067000.0-721000.046000.0101000.036000.048000.0104000.0120000.049000.083000.094000.089000.0-85000.0194000.0-154000.0241000.073000.081000.0105000.0245000.0106000.0-118000.0-2000.0531000.0666000.0-264000.0554000.038000.0-1609000.0717000.0143000.0923000.01332000.0-236000.01061000.0389000.01251000.0556000.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.10.10.10.00.00.10.0-0.30.00.00.00.00.10.10.00.10.10.1-0.10.2-0.10.20.10.10.10.40.2-0.2-0.01.62.5-1.49.22.6-24.710.32.16.36.1-0.93.31.13.21.4

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value123000.0-264000.086000.0-2000.026000.0122000.0-314000.0106000.025000.074000.08000.0283000.0128000.0135000.076000.079000.091000.050000.0155000.0-73000.053000.0151000.00-1000.0-3000.0129000.02871000.0-239000.01000.0-1160000.0-226000.0-192000.0372000.038000.01912000.0-312000.0-100000.01200000.02400000.01990000.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.1-0.10.0-0.00.00.1-0.10.00.00.00.00.10.10.10.10.10.10.00.1-0.10.00.10.0-0.0-0.00.24.9-0.50.0-3.4-0.8-1.06.22.629.3-4.5-1.58.210.97.8

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value827879788410411011111611810397876965675446444549454651302421191512114.4071.3060.7774.2365.1475.4132316213226293131
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating42.041.842.040.744.250.950.352.352.352.850.448.245.845.045.146.442.939.438.235.437.636.936.137.138.138.136.839.537.035.942.923.421.753.465.074.180.0158.675.585.299.271.075.678.380.1

us-gaap:InterestExpense us-gaap:CreditFacility

us-gaap:RevolvingCreditFacility


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
Value0.3180.30.317-900998.84050004960004900000.50.6310.9691.21.7150.3530.5321.11.1110.3490.240.506421
Percentage of InterestExpense0.40.40.4-1140822.5477296.0475829.6441572.70.40.50.81.21.80.40.81.71.60.60.51.1927.9
Percentage of InterestAndDividendIncomeOperating0.20.20.2-464578.4210957.3242098.8222043.00.20.30.40.60.80.20.30.80.80.30.20.0328.4
Percentage of InterestAndDividendIncomeOperating us-gaap:RevolvingCreditFacility0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense Debt

us-gaap:InterestExpenseDebt us-gaap:LongtermDebtType

us-gaap:InterestExpenseDebt

bxmt:ConvertibleSeniorNote


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value7.8847.8677.8637.8467.8437.8267.8217.8077.8037.7879.81510107.9727.6987.4495.1762.9772.9622.9552.941
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating4.04.24.24.04.13.83.53.73.53.54.85.35.55.15.35.14.12.52.52.32.3
Percentage of InterestAndDividendIncomeOperating bxmt:ConvertibleSeniorNote0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Income Expense Net

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value113109109114107100109101106106102105103858078727171828177828749393630262115144.7110.6792.281.7971.35-8.6265.3823.8040.258109.518.7237.872
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating58.058.258.059.355.849.149.747.747.747.249.651.854.255.054.953.657.160.661.864.662.463.163.962.961.961.963.260.563.064.157.176.678.346.635.025.920.0-58.624.514.80.829.024.421.719.9

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value736769698191101104111107948582556552
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating37.335.936.835.842.644.646.148.850.048.045.942.343.335.845.135.9

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value13179838917-53.357874757673787260575750515364635765662935212233137.0798.322.748-3.1151056.9992.28366-8.3213-1.8452549.915-134.7092.902-63.452
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating67.042.644.346.39.1-26.035.835.033.734.135.738.537.839.239.639.439.943.445.950.548.346.450.848.336.455.836.943.778.838.826.444.145.7-213.91614.1100.833.8452.2-37.953.5-5.7688.225.4-334.47.30.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.8730.6380.8070.9090.9610.0670.650.4970.3770.3020.2540.1280.1950.1580.2490.0880.0241.5986.3690.1520.3320.893.133103.8471.5774.9730.0512.6492.2064.021.518175.9011.06874-7.758-5.4668.069-0.668
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.40.30.40.50.50.00.30.20.20.10.10.10.10.10.20.10.01.24.90.10.30.63.916.96.63.111.70.29.911.766.8104.3272.285.015.8503.3-35.3-21.324.8-1.8

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-0.5410.1141.5250.72-9.3233417-3.9741.3363.466-1.373-0.713-10.2337.8032.6568.146113.845-9.813-4.246-8.697-0.687-5.17-8.25612-16.732-8.819-8.9331.8940.0362.7782.3051.7833.84-2.2791.2682.018
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-0.30.10.80.4-4.916.87.8-1.90.61.5-0.7-0.4-5.35.01.85.69.33.2-8.4-3.3-6.7-0.6-4.0-6.015.4-26.4-15.1-17.74.50.142.633.226.426.1-10.44.96.2

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value-0.5410.1140.72-9.32334-3.9741.3363.466-1.373-0.713-10.2337.8032.6568.146113.845-9.813-4.246-8.698-0.687-5.17-8.25612-16.732-8.819-8.9331.8940.0362.7782.3051.7823.83-2.0871.268
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.999.791.6100.0
Percentage of InterestAndDividendIncomeOperating-0.30.10.4-4.916.8-1.90.61.5-0.7-0.4-5.35.01.85.69.33.2-8.4-3.3-6.7-0.6-4.0-6.015.4-26.4-15.1-17.74.50.142.633.226.326.0-9.54.9
Percentage of InterestAndDividendIncomeOperating us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-0.5410.1140.72-9.32334-3.9741.3363.466-1.373-0.713-10.2337.8032.6568.146113.845-9.813-4.246-8.698-0.687-5.17-8.25612-16.732-8.819-8.9331.8940.036
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-0.30.10.4-4.916.8-1.90.61.5-0.7-0.4-5.35.01.85.69.33.2-8.4-3.3-6.7-0.6-4.0-6.015.4-26.4-15.1-17.74.50.1
Percentage of InterestAndDividendIncomeOperating us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value13280849018-53.2837975757673787261585750515366695765673246252338139.728106.768-1.597122123.351140-16.0788.2566.2242539.915-134.7092.902-63.452
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating67.542.944.746.89.6-26.036.135.333.834.235.938.537.939.339.839.539.943.445.951.853.246.551.149.040.372.743.546.890.539.036.255.8112.5-109.71886.3185.849.5955.6-73.232.219.1686.425.4-334.47.30.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.8730.6380.9090.9610.0670.4970.3770.3020.2540.1280.1950.1580.2490.0241.5986.3690.1520.3320.8913.133103.8471.5784.9730.0512.6492.2064.0191.518175.9011.06874-7.758-5.4658.068-0.668
Percentage of ProfitLoss0.70.81.05.2-0.10.70.50.40.30.20.30.30.40.02.49.20.30.51.39.723.215.26.712.90.427.221.059.4-95.114.445.731.952.748.3-66.2129.6-0.3
Percentage of InterestAndDividendIncomeOperating0.40.30.50.50.00.20.20.10.10.10.10.10.20.01.24.90.10.30.63.916.96.63.111.70.29.911.766.8104.3272.285.015.8503.3-35.3-21.324.8-1.8
Percentage of InterestAndDividendIncomeOperating us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-03-312011-03-31
Value131798917-53.3574757673787260575750515364635765662935212233137.0798.322.748-3.11566254
Percentage of ProfitLoss99.399.299.094.8100.199.399.599.699.799.899.799.799.699.8100.0100.0100.097.690.899.799.598.790.376.884.893.387.199.672.879.040.6195.147.3100.3
Percentage of InterestAndDividendIncomeOperating67.042.646.39.1-26.035.033.734.135.738.537.839.239.639.439.943.445.950.548.346.450.848.336.455.836.943.778.838.826.444.145.7-213.9452.2688.2
Percentage of InterestAndDividendIncomeOperating us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value131798917-53.3574757673787260575750515364635765662935212233137.0798.322.748-3.1151056.9992.28366-8.322266-254.585254
Percentage of ProfitLoss99.399.299.094.8100.199.399.599.699.799.899.799.799.699.8100.0100.0100.097.690.899.799.598.790.376.884.893.387.199.672.879.040.6195.185.654.368.147.351.83227.5-4090.4100.3
Percentage of InterestAndDividendIncomeOperating67.042.646.39.1-26.035.033.734.135.738.537.839.239.639.439.943.445.950.548.346.450.848.336.455.836.943.778.838.826.444.145.7-213.91614.1100.833.8452.2-37.91039.2-782.0688.2
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value17901173541695816876176631675816551150821456514796144671241912382112111025897769719895488128510948895549376985110466508545884098375428942212157710873653225815846051366153923654120
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value350035003600260027001400
Percentage of Assets19.620.221.215.415.38.5
Percentage of Assets19.620.221.215.415.38.5
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities, us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:LoansReceivable


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value336935443520264026441349
Percentage of Assets18.820.420.815.615.08.2
Percentage of Assets18.820.420.815.615.08.2
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary us-gaap:LoansReceivable100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities, us-gaap:BalanceSheetLocation

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:OtherAssets


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1378.301816.1737951
Percentage of Assets0.80.00.50.00.50.3
Percentage of Assets0.80.00.50.00.50.3
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary us-gaap:OtherAssets100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1394413450130541297213767130831276711321107881134411092911193538284734172517212645863196006697970526870735179703583308725882472188514567732852021685435615881495165024814531
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets77.977.577.076.977.978.177.175.174.176.776.773.475.573.971.674.274.272.171.770.673.673.873.374.676.270.567.363.265.965.265.849.126.355.552.493.596.297.2109.4107.2104.9110.0

us-gaap:Liabilities us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Liabilitiesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value280029002900220022001200
Percentage of Liabilities20.121.622.217.016.09.4
Percentage of Assets15.616.717.113.012.57.2
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary80.082.980.684.681.585.7

us-gaap:Liabilities us-gaap:ConsolidatedEntities, us-gaap:BalanceSheetLocation

us-gaap:VariableInterestEntityPrimaryBeneficiary, bxmt:SecuritizedDebtObligationsNet


Liabilitiesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value283328752922216822401187
Percentage of Liabilities20.321.422.416.716.39.3
Percentage of Assets15.816.617.212.812.77.2
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary bxmt:SecuritizedDebtObligationsNet0.00.00.00.00.00.0

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:OtherLiabilities


Liabilitiesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1.5982.0352.1041.4091.5271.648
Percentage of Liabilities0.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary us-gaap:OtherLiabilities0.00.00.00.00.00.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value17901173541695816876176631675816551150821456514796144671241912382112111025897769719895488128510948895549376985110466508545884098375428942212157710873653225815846051366153923654120
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value3930388338863883387436503762374237473439336433003023292129112519249325032496249524922487248314561465147712399707177137127673-24.559-34.385-38.566-110.424-100.165-110.947-124.334-411.187
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.022.422.923.021.921.822.724.825.723.223.326.624.426.128.425.828.329.426.326.126.625.223.728.631.936.133.033.532.445.265.620.822.8-4.2-5.9-6.4-8.1-6.5-4.70.0-10.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value2892802894271259355150848079105861075769613364759418111096138104185163120705210591515383437342828272424262745
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.61.72.57.12.10.90.60.60.50.70.70.90.50.70.60.30.70.91.11.91.21.01.41.00.41.11.53.22.42.40.75.54.24.86.75.96.12.51.81.20.00.60.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value339280289427125935515084791058610774102946764759418210663
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.91.61.72.57.12.10.90.60.50.70.70.90.71.01.00.70.70.91.11.91.11.4

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value3041862691582411522362432032081701556055994563168446621212718470
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.11.60.91.40.91.41.61.41.41.21.30.50.51.00.50.71.90.50.82.21.32.01.5

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value11007104639981106881140710734114539937940698579618765778396813
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets61.560.358.963.364.664.169.265.964.666.666.561.763.360.8

us-gaap:LongTermDebt us-gaap:LongtermDebtType

bxmt:AssetSpecificDebtAgreements


Long
Period End2021-06-302021-03-312020-12-31
Value299438399
Percentage of LongTermDebt2.74.24.0
Percentage of Assets1.72.52.4
Percentage of Assets bxmt:AssetSpecificDebtAgreements0.00.00.0

bxmt:SecuredTermLoans


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value13561259106210651068745746498500
Percentage of LongTermDebt12.312.010.610.09.46.96.55.05.3
Percentage of Assets7.67.36.36.36.04.44.53.33.4
Percentage of Assets bxmt:SecuredTermLoans0.00.00.00.00.00.00.00.00.0

us-gaap:ConvertibleDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value622622622622622622622622622622622794794795
Percentage of LongTermDebt5.75.96.25.85.55.85.46.36.66.36.510.410.111.7
Percentage of Assets3.53.63.73.73.53.73.84.14.34.24.36.46.47.1
Percentage of Assets us-gaap:ConvertibleDebt0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SecuredDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value872981427896900097169367100838816828392358996686270446018
Percentage of LongTermDebt79.377.879.184.285.287.388.088.788.193.793.589.689.988.3
Percentage of Assets48.846.946.653.355.055.960.958.556.962.462.255.356.953.7
Percentage of Assets us-gaap:SecuredDebt0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Secured Long Term Debt

us-gaap:SecuredLongTermDebt

us-gaap:SecuredLongTermDebt


Secured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value13561259106210651068745746498500
Percentage of SecuredLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.67.36.36.36.04.44.53.33.4

us-gaap:SecuredLongTermDebt us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Secured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value13321235104110431045734736490491
Percentage of SecuredLongTermDebt98.298.198.097.997.898.698.698.498.3
Percentage of Assets7.47.16.16.25.94.44.43.33.4
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure0.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Secured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value13471250105310291012640750500501
Percentage of SecuredLongTermDebt99.499.399.196.694.886.0100.5100.3100.2
Percentage of Assets7.57.26.26.15.73.84.53.33.4
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure0.00.00.00.00.00.00.00.00.0

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value25211820212322172912107.2215.1825.2986.341.104126.41613131245353242383890888680625655-18.515
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.20.10.10.10.00.00.10.00.10.10.10.10.10.90.80.81.11.31.85.78.223.624.810.89.79.2-1.4

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value3930388338863883387436503762374237473439336433003023292129112519249325032496249524922487248314561465147712399707177137127673-24.559-34.385-38.566-110.424-100.165-110.947-124.334-411.187
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.022.422.923.021.921.822.724.825.723.223.326.624.426.128.425.828.329.426.326.126.625.223.728.631.936.133.033.532.445.265.620.822.8-4.2-5.9-6.4-8.1-6.5-4.70.0-10.0

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312010-09-302010-06-302009-12-312008-12-31
Value395639043904390338953674378437603776345133743307302829262917252525062495249325042509250125052500249515021500150912821008756803801162153372216-128.939-110.853-116.17-411.187-426.651-293.66-169.167401
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.122.523.023.122.121.922.924.925.923.323.326.624.526.128.425.825.827.928.329.426.426.226.725.423.829.532.736.834.134.834.250.973.744.547.66.53.82.8-9.4-7.2-4.9-10.00.00.00.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312010-09-302010-06-302009-12-312008-12-31
Value1011119.6458.92518-16.233-33.394-29.42-30.756-34.222-32.849-32.136-21.903-29.706-32.362-40.508-52.357-56.202-46.389-42.143-33.445-32.758-27.588-19.332-31.756-15.024-6.2052.7280.8340.798-31.374-33.679-35.461-40.584-38.497-40.303-50.462-55.94-57.585-39.135-41.009
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.30.30.30.20.20.5-0.4-0.9-0.8-0.9-1.0-1.0-1.1-0.7-1.0-1.3-1.6-2.1-2.3-1.9-1.7-1.3-1.3-1.1-0.8-2.1-1.0-0.40.20.10.1-82.6-151.4-208.631.534.734.712.313.119.623.1-10.2
Percentage of Assets0.10.10.10.10.10.1-0.1-0.2-0.2-0.2-0.2-0.3-0.3-0.2-0.3-0.3-0.4-0.6-0.6-0.5-0.4-0.4-0.3-0.3-0.2-0.6-0.3-0.20.10.00.0-5.4-5.8-5.9-3.0-2.5-1.7-1.20.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312010-09-302010-06-302009-12-312008-12-31
Value471947104702469346854378437043624354403939663898362435153506310931023096308930843079307430703066306320302027202217671510125212421242609609597597597597596596559559559559557
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest119.3120.7120.5120.2120.3119.2115.5116.0115.3117.0117.5117.9119.7120.1120.2123.1123.8124.0123.9123.2122.7122.9122.5122.7122.8135.1135.1133.9137.9149.8165.6154.7155.0374.9396.91574.72685.93513.5-463.0-538.5-513.7-136.0-131.1-190.4-330.5138.9
Percentage of Assets26.427.127.727.826.526.126.428.929.927.327.431.429.331.434.231.831.934.635.136.232.532.232.731.129.339.944.249.347.152.256.678.8114.3166.8188.9102.9102.298.643.738.825.213.60.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-312012-12-312011-12-31
Value1.471.471.4681.4621.4621.3541.351.3431.3431.2571.2341.1971.1141.0821.0790.9480.9480.9480.9450.9390.9390.9390.9370.9320.5830.2950.2930.222
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.2-0.2
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value25211820212322172912107.2215.1825.2986.346.1781.104126.41613131245353242383890888680625655-18.515-10.688-5.223
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.70.50.50.50.50.60.60.50.80.40.30.20.20.20.20.20.00.50.30.50.50.53.02.42.13.33.85.111.211.153.252.1164.7254.6326.914.49.64.5
Percentage of Assets0.10.10.10.10.10.10.10.10.20.10.10.10.00.00.10.10.00.10.10.10.10.10.90.80.81.11.31.85.78.223.624.810.89.79.2-1.4-0.7-0.2
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value393038833886388338743650376237423747343933643300302329212911251925062495249325032496249524922487248314561465147712399707177137127673-110.424-411.187-169.167401
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest99.399.599.599.599.599.499.499.599.299.699.799.899.899.899.899.8100.0100.0100.0100.099.599.799.599.599.597.097.697.996.796.294.988.888.946.847.985.6100.0100.0100.0
Percentage of Assets22.022.422.923.021.921.822.724.825.723.223.326.624.426.128.425.825.827.928.329.426.326.126.625.223.728.631.936.133.033.532.445.265.620.822.8-8.1-10.00.00.0
Percentage of Assets us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312010-09-302010-06-302009-12-312008-12-31
Value-800.455-840.717-829.284-821.725-820.783-747.533-592.548-587.632-579.131-570.908-569.428-566.417-570.265-573.384-567.168-558.066-556.896-548.615-541.137-535.804-542.282-547.052-545.791-552.881-561.905-542.654-547.592-538.726-531.858-542.004-536.17-529.947-530.491-533.238-535.851-591.276-598.275-600.558-667.111-658.789-667.615-920.355-930.27-795.562-689.396-115.202
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-20.2-21.5-21.2-21.0-21.1-20.3-15.7-15.6-15.3-16.5-16.9-17.1-18.8-19.6-19.4-22.1-22.2-22.0-21.7-21.4-21.6-21.9-21.8-22.1-22.5-36.1-36.5-35.7-41.5-53.7-70.9-66.0-66.2-328.3-349.2-1557.4-2690.1-3533.1517.4594.3574.7223.8218.0270.9407.5-28.7
Percentage of Assets-4.5-4.8-4.9-4.9-4.6-4.5-3.6-3.9-4.0-3.9-3.9-4.6-4.6-5.1-5.5-5.7-5.7-6.1-6.1-6.3-5.7-5.7-5.8-5.6-5.4-10.7-11.9-13.1-14.2-18.7-24.2-33.6-48.8-146.0-166.2-101.7-102.4-99.2-48.8-42.8-28.2-22.30.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1.471.471.4681.4621.4621.3541.351.3431.3431.2571.2341.1971.1141.0821.0790.9480.9480.9480.9450.9390.9370.5850.5830.5720.4790.3870.2880.2880.2880.2930.2930.2250.2250.222
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value471947104702469346854378437043624354403939663898362435153506310931023096308930843079307430703066306320302027202217671510125212421242609609597597597
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.427.127.727.826.526.126.428.929.927.327.431.429.331.434.231.831.934.635.136.232.532.232.731.129.339.944.249.347.152.256.678.8114.3166.8188.9102.9102.243.7

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value-800.455-840.717-829.284-821.725-820.783-747.533-592.548-587.632-579.131-570.908-569.428-566.417-570.265-573.384-567.168-558.066-556.896-548.615-541.137-535.804-542.282-547.052-545.791-552.881-561.905-542.654-547.592-538.726-531.858-542.004-536.17-529.947-530.491-533.238-535.851-591.276-598.275-600.558-667.111-658.789-667.615-920.355
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-4.5-4.8-4.9-4.9-4.6-4.5-3.6-3.9-4.0-3.9-3.9-4.6-4.6-5.1-5.5-5.7-5.7-6.1-6.1-6.3-5.7-5.7-5.8-5.6-5.4-10.7-11.9-13.1-14.2-18.7-24.2-33.6-48.8-146.0-166.2-101.7-102.4-99.2-48.8-42.8-28.2-22.3

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1011119.6458.92518-16.233-33.394-29.42-30.756-34.222-32.849-32.136-21.903-29.706-32.362-40.508-52.357-56.202-46.389-42.143-33.445-32.758-27.588-19.332-31.756-15.024-6.2052.7280.8340.7980.00.00.0-31.374-33.679-35.461-40.584-38.497-40.303-50.462
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.1-0.1-0.2-0.2-0.2-0.2-0.3-0.3-0.2-0.3-0.3-0.4-0.6-0.6-0.5-0.4-0.4-0.3-0.3-0.2-0.6-0.3-0.20.10.00.00.00.00.0-5.4-5.8-5.9-3.0-2.5-1.7-1.2

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value25211820212322172912107.2215.1825.2986.341.104126.41613131245353242383890888680625655-18.515
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.20.10.10.10.00.00.10.00.10.10.10.10.10.90.80.81.11.31.85.78.223.624.810.89.79.2-1.4

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:StockIssuedDuringPeriodValueNewIssues


Stock
Period End2021-03-312020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0.0022970.004306651062671020.0033910.00.00.0030.0060.00.00.0020.005-0.02210290.0022.736252254256-0.0030.0
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-03-312020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value0.0020.1080.0040.0860.0230.0370.0830.0320.0030.1310.00.00.0030.0060.00.00.0020.005
Percentage of StockIssuedDuringPeriodValueNewIssues100.00.0100.00.00.00.00.00.0100.00.00.00.0100.0100.00.00.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Stock
Period End2021-03-312020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0.0022970.004306651062671020.0033910.00.00.0030.0060.00.00.0020.005-0.02210290.0022.736252254256-0.0030.0
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-30
Value10111.6653.4476.681190.6640.0641.8070.1142.4111.5751.128130.1086.8790.2260.217360.4520.452120.5730.57554-1.4120.2580.001
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-30
Value10111.6653.4476.681190.6640.0641.8070.1142.4111.5751.128130.1086.8790.2260.217360.4520.452120.5730.57554-1.4120.2580.001
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value828375851076875717977678762725065145.8437.8460.756-4.835.095.231.2788.7356.8978.1744.2658.2058.002
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating41.944.339.944.155.833.534.233.435.634.532.643.232.646.734.844.953.131.0130.451.9-74.173.377.38.739.726.925.111.521.019.9

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-401.381-523.5911712914-249.266-1202.53-578.193243-333.446-2040.19-57.211-1186.763-967.495-461.06526-1586.797471-670.1312.66263200.244105147234147723490129
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-204.5-279.29.366.57.6-121.7-544.9-270.3108.8-148.4-989.9-28.2-619.8-622.5-315.518.0-5912.72502.4-11137.3182.8975.2295.03.6715.7671.0915.94538.4634.0231.2321.7

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value374431-231.547-1048.9947803891193511-321.5122291992-51.6871158857417-67.067614472706-3.48-82.166-21.31-8.068-104.22-149.578-241.961-1484.939-235.442-98.107-139.915
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating190.7230.2-122.6-540.9406.7189.9540.6239.1-143.9102.2966.9-25.4605.3551.8285.8-45.82290.22508.411744.6-239.0-1260.8-306.9-119.3-708.2-680.7-943.6-4561.5-636.5-251.5-347.4

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value828375851076875717977678762725065145.8437.8460.756-4.835.095.231.2788.7356.8978.1744.2658.2058.002
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating41.944.339.944.155.833.534.233.435.634.532.643.232.646.734.844.953.131.0130.451.9-74.173.377.38.739.726.925.111.521.019.9

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value13179838917-53.357874757673787260575750515364635765662935212233137.0798.322.748-3.1151056.9992.28366-8.3213-1.8452549.915-134.7092.902-63.452
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating67.042.644.346.39.1-26.035.835.033.734.135.738.537.839.239.639.439.943.445.950.548.346.450.848.336.455.836.943.778.838.826.444.145.7-213.91614.1100.833.8452.2-37.953.5-5.7688.225.4-334.47.30.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value13280849018-53.2837975757673787261585750515366695765673246252338139.728106.768-1.597122123.351140-16.0788.2566.2242539.915-134.7092.902-63.452
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating67.542.944.746.89.6-26.036.135.333.834.235.938.537.939.339.839.539.943.445.951.853.246.551.149.040.372.743.546.890.539.036.255.8112.5-109.71886.3185.849.5955.6-73.232.219.1686.425.4-334.47.30.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.8730.6380.9090.9610.0670.4970.3770.3020.2540.1280.1950.1580.2490.0241.5986.3690.1520.3320.8913.133103.8471.5784.9730.0512.6492.2064.0191.518175.9011.06874-7.758-5.4658.068-0.668
Percentage of ProfitLoss0.70.81.05.2-0.10.70.50.40.30.20.30.30.40.02.49.20.30.51.39.723.215.26.712.90.427.221.059.4-95.114.445.731.952.748.3-66.2129.6-0.3
Percentage of InterestAndDividendIncomeOperating0.40.30.50.50.00.20.20.10.10.10.10.10.20.01.24.90.10.30.63.916.96.63.111.70.29.911.766.8104.3272.285.015.8503.3-35.3-21.324.8-1.8
Percentage of InterestAndDividendIncomeOperating us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-03-312011-03-31
Value131798917-53.3574757673787260575750515364635765662935212233137.0798.322.748-3.11566254
Percentage of ProfitLoss99.399.299.094.8100.199.399.599.699.799.899.799.799.699.8100.0100.0100.097.690.899.799.598.790.376.884.893.387.199.672.879.040.6195.147.3100.3
Percentage of InterestAndDividendIncomeOperating67.042.646.39.1-26.035.033.734.135.738.537.839.239.639.439.943.445.950.548.346.450.848.336.455.836.943.778.838.826.444.145.7-213.9452.2688.2
Percentage of InterestAndDividendIncomeOperating us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value131798917-53.3574757673787260575750515364635765662935212233137.0798.322.748-3.1151056.9992.28366-8.322266-254.585254
Percentage of ProfitLoss99.399.299.094.8100.199.399.599.699.799.899.799.799.699.8100.0100.0100.097.690.899.799.598.790.376.884.893.387.199.672.879.040.6195.185.654.368.147.351.83227.5-4090.4100.3
Percentage of InterestAndDividendIncomeOperating67.042.646.39.1-26.035.033.734.135.738.537.839.239.639.439.943.445.950.548.346.450.848.336.455.836.943.778.838.826.444.145.7-213.91614.1100.833.8452.2-37.91039.2-782.0688.2
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value8.028.0858.5548.6498.6518.6787.387.7547.7547.7687.6666.7346.7786.9766.2225.9435.9595.9075.3826.2025.4634.8526.2473.2865.086.1042.8922.0552.7991.974.1040.5520.5851.0010.6780.4650.0810.1290.0940.0940.0940.2230.0310.031
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensation us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementEquityComponents

us-gaap:RestrictedStock, bxmt:BXMTAdvisorsLimitedLiabilityCompany, us-gaap:CommonStock


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value4.14.04.24.34.24.33.63.83.93.83.93.23.23.23.02.92.92.92.52.52.52.1
Percentage of ShareBasedCompensation51.149.549.149.748.549.648.849.050.348.950.947.547.245.948.248.848.749.146.540.345.843.3

us-gaap:ShareBasedCompensation us-gaap:TitleOfIndividual, us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementEquityComponents

bxmt:Manager, us-gaap:RestrictedStock, bxmt:BXMTAdvisorsLimitedLiabilityCompany, us-gaap:CommonStock


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-4.9274.3-4.1-5.8323.83.93.8
Percentage of ShareBasedCompensation-61.1336.450.3-47.4-67.0369.949.050.348.9

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-401.381-523.5911712914-249.266-1202.53-578.193243-333.446-2040.19-57.211-1186.763-967.495-461.06526-1586.797471-670.1312.66263200.244105147234147723490129
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-204.5-279.29.366.57.6-121.7-544.9-270.3108.8-148.4-989.9-28.2-619.8-622.5-315.518.0-5912.72502.4-11137.3182.8975.2295.03.6715.7671.0915.94538.4634.0231.2321.7

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value374431-231.547-1048.9947803891193511-321.5122291992-51.6871158857417-67.067614472706-3.48-82.166-21.31-8.068-104.22-149.578-241.961-1484.939-235.442-98.107-139.915
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating190.7230.2-122.6-540.9406.7189.9540.6239.1-143.9102.2966.9-25.4605.3551.8285.8-45.82290.22508.411744.6-239.0-1260.8-306.9-119.3-708.2-680.7-943.6-4561.5-636.5-251.5-347.4

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-04-152014-06-302014-03-31
Value91919090838383837776746967665858585858585858574830302823181813
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Dividends

us-gaap:Dividends

us-gaap:Dividends


Dividends
Period End2021-06-152021-03-152020-07-15
Value919190
Percentage of Dividends100.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage

us-gaap:DebtInstrumentInterestRateStatedPercentage


Debt
Period End2020-12-312013-06-30
Value5.150.0179
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:StatementGeographical

bxmt:SeniorMortgageLoansLessThanThreePercentageOfCarryingAmountOfLoans, srt:OfficeBuilding, bxmt:DiversifiedLocation


Debt
Period End2020-12-312019-12-31
Value4.460.0446
Percentage of DebtInstrumentInterestRateStatedPercentage86.60.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations bxmt:SeniorMortgageLoansLessThanThreePercentageOfCarryingAmountOfLoans srt:OfficeBuilding bxmt:DiversifiedLocation0.00.0

us-gaap:SecondMortgage, bxmt:Various, bxmt:DiversifiedLocation


Debt
Period End2020-12-312019-12-312018-12-31
Value5.750.05740.0575
Percentage of DebtInstrumentInterestRateStatedPercentage111.70.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations us-gaap:SecondMortgage bxmt:Various bxmt:DiversifiedLocation0.00.00.0

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-312020-12-31
Value0263810.0582920.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod0.0100.0100.0

bxmt:AdjustmentsToAdditionalPaidInCapitalDeferredCompensation

bxmt:AdjustmentsToAdditionalPaidInCapitalDeferredCompensation


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.094000.094000.093000.094000.094000.094000.094000.093000.094000.094000.094000.093000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalDeferredCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:AdjustmentsToAdditionalPaidInCapitalDeferredCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.094000.094000.093000.094000.094000.094000.094000.093000.094000.094000.094000.093000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalDeferredCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Parent


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.094000.094000.093000.094000.094000.094000.094000.093000.094000.094000.094000.093000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalDeferredCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:AnnualDistributionOfNetTaxableIncomePercentage

bxmt:AnnualDistributionOfNetTaxableIncomePercentage


Annual
Period End2021-06-302021-03-312020-12-31
Value090.00
Percentage of AnnualDistributionOfNetTaxableIncomePercentage0.0100.00.0

bxmt:AssetSpecificFinancingsGuaranteeValue us-gaap:CreditFacility

bxmt:AssetSpecificFinancingsGuaranteeValue

bxmt:AssetSpecificFinancings


Asset
Period End2020-12-312020-09-302020-06-302020-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value7.4289.27-79.17595-6.302-213.41621229-0.042-4.6071.241165-1.323126
Percentage of AssetSpecificFinancingsGuaranteeValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:CashContributionsFromJointVenturePartnersThatIncreaseEquity

bxmt:CashContributionsFromJointVenturePartnersThatIncreaseEquity


Cash
Period End2021-06-302021-03-312020-09-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value14130.3238.1088.093171.474.8152.0252.10.375
Percentage of CashContributionsFromJointVenturePartnersThatIncreaseEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:CashContributionsFromJointVenturePartnersThatIncreaseEquity us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Cash
Period End2021-06-302021-03-312020-09-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value14130.3238.1088.093171.474.8152.0252.10.375
Percentage of CashContributionsFromJointVenturePartnersThatIncreaseEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:CommonStockDividendsDeclared

bxmt:CommonStockDividendsDeclared


Common
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value91919090838383777469675858
Percentage of CommonStockDividendsDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:ComputedManagementFeePercentOfAverageOutstandingEquityBalance

bxmt:ComputedManagementFeePercentOfAverageOutstandingEquityBalance


Computed
Period End2021-06-302021-03-312020-12-31
Value01.50
Percentage of ComputedManagementFeePercentOfAverageOutstandingEquityBalance0.0100.00.0

bxmt:CoreGeneralAndAdministrativeExpenses

bxmt:CoreGeneralAndAdministrativeExpenses


Core
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value2.6492.5122.9972.5932.6343.1132.5231.9872.1431.5451.9661.7091.9691.7321.481.4221.3511.4621.2891.1331.2771.7591.7471.939101.5591.4211.0861.1171.095
Percentage of CoreGeneralAndAdministrativeExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:DebtInstrumentAmortizationPercentage

bxmt:DebtInstrumentAmortizationPercentage


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value01.000.9900.0100
Percentage of DebtInstrumentAmortizationPercentage0.0100.00.0100.00.0100.00.00.0

bxmt:DebtInstrumentAmortizationPercentage us-gaap:LongtermDebtType

bxmt:TwentyNineteenTermLoan


Debt
Period End2021-06-302021-03-312020-12-312020-09-30
Value01.000.99
Percentage of DebtInstrumentAmortizationPercentage0.0100.00.0100.0

bxmt:TwentyTwentyTermLoan


Debt
Period End2021-06-302021-03-312020-12-312020-09-30
Value01.000.99
Percentage of DebtInstrumentAmortizationPercentage0.0100.00.0100.0

bxmt:DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate

bxmt:DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate


Debt
Period End2021-03-312020-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value100.000.0010.0030.788-0.0010-0.0010.789
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate100.00.0100.0100.0100.0100.00.0100.0100.0

bxmt:DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:LoansReceivable


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value1.373.1-0.972.944-0.0340.79
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate0.073.10.00.00.00.0

bxmt:DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate us-gaap:CreditFacility

bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value73.1-0.972.944-0.0340.79-0.001000.7950.0010.0010.0030.788-0.0010-0.0010.789
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate73.10.00.00.00.00.00.00.00.00.0100.0100.0100.0100.00.0100.0100.0

bxmt:DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate us-gaap:CreditFacility, us-gaap:VariableRate

bxmt:CreditFacilities, bxmt:BBSY


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value72.5071.775-0.0550.78000.0020.778
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate72.50.00.00.00.00.00.00.00.0

bxmt:CreditFacilities, bxmt:Cdor


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value75.8-0.176.01700.783-0.0230-0.0140.821
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate75.80.00.00.00.00.00.00.00.0

bxmt:CreditFacilities, bxmt:EURLIBOR


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value72.8-0.573.004-0.0040.8000.020.78
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate72.80.00.00.00.00.00.00.00.0

bxmt:CreditFacilities, bxmt:GBPLIBOR


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value71.60.170.785-0.0640.7790.003-0.008-0.0210.8
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate71.60.00.00.00.00.00.00.00.0

bxmt:CreditFacilities, bxmt:Sek


Debt
Period End2021-03-31
Value80.0
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate80.0

bxmt:CreditFacilities, bxmt:UsdLibor


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value73.2-1.373.447-0.0350.788-0.0010.00100.796
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesAdvanceRate73.20.00.00.00.00.00.00.00.0

bxmt:DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate us-gaap:CounterpartyName

bxmt:DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate

bxmt:DeutscheBank


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value25.0024.7500.250000.25
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate100.00.0100.00.0100.00.00.00.0100.0

bxmt:WellsFargo


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312015-03-312014-12-31
Value25.0024.7500.2500.250
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate100.00.0100.00.0100.00.00.00.0

bxmt:DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate us-gaap:CounterpartyName, us-gaap:CreditFacility

bxmt:BankOfAmerica, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value50.0049.500.50000.50000.50000.5
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate200.00.0200.00.0200.00.00.00.0200.00.00.00.00.00.00.00.00.0

bxmt:BankOfAmericaMultifamilyJointVenture, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value43.0042.5700.430000.430000.430
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate172.00.0172.00.0172.00.00.00.0172.00.00.00.00.00.0

bxmt:Barclays, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value25.0024.7500.250000.250000.25
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate100.00.0100.00.0100.00.00.00.0100.00.00.00.00.0

bxmt:Citibank, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value25.0024.7500.250000.250000.250000.25
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate100.00.0100.00.0100.00.00.00.0100.00.00.00.00.00.00.00.00.0

bxmt:DeutscheBank, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value67.01.060.4-0.020.62-0.010.01-0.010.6-0.07-0.010.060.2700.100.25
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate268.00.0244.00.0248.00.00.00.0240.00.00.00.00.00.00.00.00.0

bxmt:GoldmanSachs, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value25.0024.7500.250000.25
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate100.00.0100.00.0100.00.00.00.0100.0

bxmt:GoldmanSachsMultifamilyJointVenture, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value25.0024.7500.250000.250000.250
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate100.00.0100.00.0100.00.00.00.0100.00.00.00.00.00.0

bxmt:JPMorgan, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value43.0042.570.010.420000.50000.50000.5
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate172.00.0172.00.0168.00.00.00.0200.00.00.00.00.00.00.00.00.0

bxmt:Metlife, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value72.09.061.380.010.6100.1100.50000.50000.5
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate288.00.0248.00.0244.00.00.00.0200.00.00.00.00.00.00.00.00.0

bxmt:MorganStanley, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value25.0024.7500.250000.250000.250000.25
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate100.00.0100.00.0100.00.00.00.0100.00.00.00.00.00.00.00.00.0

bxmt:Santander, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value50.0049.500.50
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate200.00.0200.00.0200.00.0

bxmt:SocieteGenerale, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value25.0024.7500.250000.250000.250000.25
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate100.00.0100.00.0100.00.00.00.0100.00.00.00.00.00.00.00.00.0

bxmt:UsBankMultiJv, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value25.0024.7500.250
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate100.00.0100.00.0100.00.0

bxmt:WellsFargo, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value25.0024.7500.250000.250000.250000.25
Percentage of DebtInstrumentRevolvingRepurchaseFacilitiesGuaranteeRate100.00.0100.00.0100.00.00.00.0100.00.00.00.00.00.00.00.00.0

bxmt:DerivativeCashPaymentOnHedge us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

bxmt:DerivativeCashPaymentOnHedge

us-gaap:ForeignExchangeContract, us-gaap:NetInvestmentHedging


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-09-302019-06-302019-03-312018-03-312017-03-31
Value0.0834932674.7245.02.07.47.4
Percentage of DerivativeCashPaymentOnHedge100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:DividendsDeclaredAndNotPaid

bxmt:DividendsDeclaredAndNotPaid


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-0.009910.3620.06.722830.4430.05.346772.3355.1012.014678.0950.00.006580.2270.0060.156580.2959.321830
Percentage of DividendsDeclaredAndNotPaid100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:ExciseTaxRate

bxmt:ExciseTaxRate


Excise
Period End2021-06-302021-03-312020-12-31
Value04.00
Percentage of ExciseTaxRate0.0100.00.0

bxmt:GeneralAndAdministrativeOperatingAndOtherCosts

bxmt:GeneralAndAdministrativeOperatingAndOtherCosts


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value606000.0693000.0803000.0878000.0882000.01451000.0976000.0810000.0894000.0449000.0912000.0687000.0830000.0509000.0479000.0489000.0489000.0445000.0452000.0305000.0521000.0869000.0
Percentage of GeneralAndAdministrativeOperatingAndOtherCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:IncentiveFeeComputationPercentOfAverageOutstandingEquityPerAnnum

bxmt:IncentiveFeeComputationPercentOfAverageOutstandingEquityPerAnnum


Incentive
Period End2021-06-302021-03-312020-12-31
Value07.00
Percentage of IncentiveFeeComputationPercentOfAverageOutstandingEquityPerAnnum0.0100.00.0

bxmt:IncentiveFeeComputationPercentOfProductPerAgreement

bxmt:IncentiveFeeComputationPercentOfProductPerAgreement


Incentive
Period End2021-06-302021-03-312020-12-31
Value020.00
Percentage of IncentiveFeeComputationPercentOfProductPerAgreement0.0100.00.0

bxmt:IncreaseDecreaseInCurrentExpectedCreditLossReserve

bxmt:IncreaseDecreaseInCurrentExpectedCreditLossReserve


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-50.906-1.293-5.813-6.05556122
Percentage of IncreaseDecreaseInCurrentExpectedCreditLossReserve100.0100.0100.0100.0100.0100.0

bxmt:InterestExpenseSecuredDebt

bxmt:InterestExpenseSecuredDebt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-012018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1212119.110121011121335131212114.73.80.037
Percentage of InterestExpenseSecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:JointVentureManagementRelatedExpenses us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty

bxmt:JointVentureManagementRelatedExpenses

srt:Multifamily, us-gaap:CorporateJointVenture


Joint
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value197000.0235000.0231000.0293000.0200000.0376000.0298000.0234000.0164000.0169000.0125000.077000.0124000.0101000.0120000.0112000.0
Percentage of JointVentureManagementRelatedExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:LoanPrincipalPaymentsHeldByServicer

bxmt:LoanPrincipalPaymentsHeldByServicer


Loan
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value252.57816-78.026800.656-7.25923-4.31371.2782.247-3.3544.68415-4.569-37.63342-8.845-129.0586375-114.744137950.108
Percentage of LoanPrincipalPaymentsHeldByServicer100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:LoanRepaymentsAndSalesProceeds

bxmt:LoanRepaymentsAndSalesProceeds


Loan
Period End2021-06-302021-03-312020-12-31
Value1880798561
Percentage of LoanRepaymentsAndSalesProceeds100.0100.0100.0

bxmt:LoanRepaymentsAndSalesProceedsPrincipalBalance

bxmt:LoanRepaymentsAndSalesProceedsPrincipalBalance


Loan
Period End2021-06-302021-03-312020-12-31
Value-1880200000.0-798160000.0-561090000.0
Percentage of LoanRepaymentsAndSalesProceedsPrincipalBalance100.0100.0100.0

bxmt:MortgageLoansOnRealEstateAmortizationOfDeferredFeesAndOtherItems

bxmt:MortgageLoansOnRealEstateAmortizationOfDeferredFeesAndOtherItems


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-30
Value14141315
Percentage of MortgageLoansOnRealEstateAmortizationOfDeferredFeesAndOtherItems100.0100.0100.0100.0

bxmt:MortgageLoansOnRealEstateDeferredFeesAndOtherItems

bxmt:MortgageLoansOnRealEstateDeferredFeesAndOtherItems


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-30
Value23177.062.917
Percentage of MortgageLoansOnRealEstateDeferredFeesAndOtherItems100.0100.0100.0100.0

bxmt:MortgageLoansOnRealEstateDeferredFeesAndOtherItemsForeignCurrencyTranslationUnrealizedGainLoss

bxmt:MortgageLoansOnRealEstateDeferredFeesAndOtherItemsForeignCurrencyTranslationUnrealizedGainLoss


Mortgage
Period End2021-06-302021-03-312020-12-31
Value216000.0-524000.01580000.0
Percentage of MortgageLoansOnRealEstateDeferredFeesAndOtherItemsForeignCurrencyTranslationUnrealizedGainLoss100.0100.0100.0

bxmt:MortgageLoansOnRealEstateFaceAmountOfMortgagesForeignCurrencyTranslationUnrealizedGainLoss

bxmt:MortgageLoansOnRealEstateFaceAmountOfMortgagesForeignCurrencyTranslationUnrealizedGainLoss


Mortgage
Period End2021-06-302021-03-312020-12-31
Value35-116.686253
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgagesForeignCurrencyTranslationUnrealizedGainLoss100.0100.0100.0

bxmt:MortgageLoansOnRealEstateForeignCurrencyTranslationUnrealizedGainLoss

bxmt:MortgageLoansOnRealEstateForeignCurrencyTranslationUnrealizedGainLoss


Mortgage
Period End2021-06-302021-03-312020-12-31
Value35-116.162251
Percentage of MortgageLoansOnRealEstateForeignCurrencyTranslationUnrealizedGainLoss100.0100.0100.0

bxmt:NetProceedsFromSecuredTermLoanBorrowings

bxmt:NetProceedsFromSecuredTermLoanBorrowings


Net
Period End2021-06-302021-03-312020-09-30
Value1001980.0
Percentage of NetProceedsFromSecuredTermLoanBorrowings100.0100.00.0

bxmt:NetTaxableIncomeSubjectToDistributionPercent

bxmt:NetTaxableIncomeSubjectToDistributionPercent


Net
Period End2021-06-302021-03-312020-12-31
Value0100.00
Percentage of NetTaxableIncomeSubjectToDistributionPercent0.0100.00.0

bxmt:NonCashAndLegacyCompensationExpenses

bxmt:NonCashAndLegacyCompensationExpenses


Non
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value8.028.0858.5548.6498.6528.6787.387.7547.7547.7687.6666.7346.7786.9766.2225.9445.9595.9075.3996.2415.4634.9866.253.2865.2496.1044.62.077131.974.2780.552
Percentage of NonCashAndLegacyCompensationExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:NoninterestExpenseDirectorsFeesPaidInCash bxmt:Amendment, us-gaap:TitleOfIndividual

bxmt:NoninterestExpenseDirectorsFeesPaidInCash

bxmt:AmendmentOne, bxmt:BoardOfDirectors


Noninterest
Period End2021-04-30
Value95000.0
Percentage of NoninterestExpenseDirectorsFeesPaidInCash100.0

bxmt:NoninterestExpenseDirectorsFeesPaidInCash bxmt:Amendment, us-gaap:TitleOfIndividual, us-gaap:SubsequentEventType

bxmt:AmendmentOne, bxmt:BoardOfDirectors, us-gaap:SubsequentEvent


Noninterest
Period End2021-04-30
Value95000.0
Percentage of NoninterestExpenseDirectorsFeesPaidInCash100.0

bxmt:NoninterestExpenseDirectorsFeesPaidInCash us-gaap:TitleOfIndividual

bxmt:BoardOfDirectors


Noninterest
Period End2021-06-302021-03-312020-12-31
Value075000.00
Percentage of NoninterestExpenseDirectorsFeesPaidInCash0.00.00.0

bxmt:NoninterestExpenseDirectorsFeesPaidinkind bxmt:Amendment, us-gaap:TitleOfIndividual

bxmt:NoninterestExpenseDirectorsFeesPaidinkind

bxmt:AmendmentOne, bxmt:BoardOfDirectors


Noninterest
Period End2021-04-30
Value115000.0
Percentage of NoninterestExpenseDirectorsFeesPaidinkind100.0

bxmt:NoninterestExpenseDirectorsFeesPaidinkind bxmt:Amendment, us-gaap:TitleOfIndividual, us-gaap:SubsequentEventType

bxmt:AmendmentOne, bxmt:BoardOfDirectors, us-gaap:SubsequentEvent


Noninterest
Period End2021-04-30
Value115000.0
Percentage of NoninterestExpenseDirectorsFeesPaidinkind100.0

bxmt:NoninterestExpenseDirectorsFeesPaidinkind us-gaap:TitleOfIndividual

bxmt:BoardOfDirectors


Noninterest
Period End2021-06-302021-03-312020-12-31
Value0100000.00
Percentage of NoninterestExpenseDirectorsFeesPaidinkind0.00.00.0

bxmt:OtherComprehensiveIncomeRealizedAndUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

bxmt:OtherComprehensiveIncomeRealizedAndUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-16.09435-71.1-61.936-30.665103-50.8843510-1.948161.70324-2.935-0.478-8.029-8.196-3.925145.88212-6.666
Percentage of OtherComprehensiveIncomeRealizedAndUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:PaymentsForCollateralDepositsRelatedToDerivatives

bxmt:PaymentsForCollateralDepositsRelatedToDerivatives


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4535906489102482.310.09.096.88144.54133.51
Percentage of PaymentsForCollateralDepositsRelatedToDerivatives100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

bxmt:PaymentsForDerivativeInstrumentsInInvestingActivities

bxmt:PaymentsForDerivativeInstrumentsInInvestingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value155635694.708231.8741.7091.9710.974.4446.5790.0557.3972.7558.7175.6463.752
Percentage of PaymentsForDerivativeInstrumentsInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:PercentageOfYieldInSubordinateRiskRetentionInterest

bxmt:PercentageOfYieldInSubordinateRiskRetentionInterest


Percentage
Period End2021-06-302021-03-312020-12-31
Value010.00
Percentage of PercentageOfYieldInSubordinateRiskRetentionInterest0.0100.00.0

bxmt:ProceedsFromAssetSpecificDebtAgreements

bxmt:ProceedsFromAssetSpecificDebtAgreements


Proceeds
Period End2021-06-302021-03-312020-06-302020-03-31
Value39381730
Percentage of ProceedsFromAssetSpecificDebtAgreements100.0100.0100.0100.0

bxmt:ProceedsFromCollateralDepositsRelatedToDerivatives

bxmt:ProceedsFromCollateralDepositsRelatedToDerivatives


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4286497767132190.05.094.0147.011107.14
Percentage of ProceedsFromCollateralDepositsRelatedToDerivatives100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

bxmt:ProceedsFromDerivativeInstrumentsInInvestingActivities

bxmt:ProceedsFromDerivativeInstrumentsInInvestingActivities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value157.2873.1411.8210.0338513256.9372.9561214200.0220.3380.04.2121.903
Percentage of ProceedsFromDerivativeInstrumentsInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

bxmt:ProceedsFromIssuanceOfCollateralizedLoanObligations

bxmt:ProceedsFromIssuanceOfCollateralizedLoanObligations


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-31
Value8080.00.01243
Percentage of ProceedsFromIssuanceOfCollateralizedLoanObligations100.00.00.0100.0

bxmt:RealisedGainsLossesOnDerivativeFinancialInstrumentsNet

bxmt:RealisedGainsLossesOnDerivativeFinancialInstrumentsNet


Realised
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value680000.0-3799000.0-1845000.0834000.096000.0-449000.0235000.0
Percentage of RealisedGainsLossesOnDerivativeFinancialInstrumentsNet100.0100.0100.0100.0100.0100.0100.0

bxmt:RepaymentsForCollateralizedLoanObligations

bxmt:RepaymentsForCollateralizedLoanObligations


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value8394847730.0179
Percentage of RepaymentsForCollateralizedLoanObligations100.0100.0100.0100.00.0100.0

bxmt:RepaymentsOfSecuredTermLoans

bxmt:RepaymentsOfSecuredTermLoans


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value3434000.03191000.02685000.02684000.01872000.01872000.01872000.0
Percentage of RepaymentsOfSecuredTermLoans100.0100.0100.0100.0100.0100.0100.0

bxmt:SecuritizedDebtObligationsYieldRate us-gaap:Collateral, us-gaap:UnderlyingAssetClass, us-gaap:VariableRate

bxmt:SecuritizedDebtObligationsYieldRate

bxmt:CollateralAssets, bxmt:AssetSecuritization, us-gaap:LondonInterbankOfferedRateLIBOR


Securitized
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3.5703.5343-0.00030.0360000.0360000.036
Percentage of SecuritizedDebtObligationsYieldRate100.00.0100.0100.0100.00.00.00.0100.00.00.00.0100.0

bxmt:CollateralAssets, bxmt:CollateralizedLoanObligations2020, us-gaap:LondonInterbankOfferedRateLIBOR


Securitized
Period End2020-09-302020-06-302020-03-31
Value3.138-0.00020.0322
Percentage of SecuritizedDebtObligationsYieldRate88.866.789.4

bxmt:CollateralAssets, bxmt:TwentyTwentyFlThreeCollateralizedLoanObligation, us-gaap:LondonInterbankOfferedRateLIBOR


Securitized
Period End2021-06-302021-03-31
Value-0.043.08
Percentage of SecuritizedDebtObligationsYieldRate0.086.3

bxmt:CollateralAssets, bxmt:TwentyTwentyFlTwoCollateralizedLoanObligation, us-gaap:LondonInterbankOfferedRateLIBOR


Securitized
Period End2021-06-302021-03-31
Value-0.023.15
Percentage of SecuritizedDebtObligationsYieldRate0.088.2

bxmt:CollateralAssets, us-gaap:CollateralizedLoanObligations, us-gaap:LondonInterbankOfferedRateLIBOR


Securitized
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3.540.053.3067-0.00020.03350-0.0024-0.00070.0374
Percentage of SecuritizedDebtObligationsYieldRate99.20.093.666.793.10.00.00.0103.9

bxmt:SecuritizedDebtObligationsYieldRate us-gaap:Collateral, us-gaap:VariableRate

bxmt:CollateralAssets, us-gaap:LondonInterbankOfferedRateLIBOR


Securitized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-0.073.26-0.053.2668-0.00040.03360-0.0013
Percentage of SecuritizedDebtObligationsYieldRate0.091.30.092.4133.393.30.00.0

bxmt:SecuritizedDebtObligationsYieldRate us-gaap:FinancialInstrument, us-gaap:UnderlyingAssetClass, us-gaap:VariableRate

bxmt:DebtFinancing, bxmt:AssetSecuritization, us-gaap:LondonInterbankOfferedRateLIBOR


Securitized
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.6301.613700.0163-0.0001000.016500-0.00330.0198
Percentage of SecuritizedDebtObligationsYieldRate45.70.045.7-0.045.30.00.00.045.80.00.00.055.0

bxmt:DebtFinancing, bxmt:CollateralizedLoanObligations2020, us-gaap:LondonInterbankOfferedRateLIBOR


Securitized
Period End2020-09-302020-06-302020-03-31
Value1.4158-0.00050.0147
Percentage of SecuritizedDebtObligationsYieldRate40.1166.740.8

bxmt:DebtFinancing, bxmt:TwentyTwentyFlThreeCollateralizedLoanObligation, us-gaap:LondonInterbankOfferedRateLIBOR


Securitized
Period End2021-03-31
Value2.1
Percentage of SecuritizedDebtObligationsYieldRate58.8

bxmt:DebtFinancing, bxmt:TwentyTwentyFlTwoCollateralizedLoanObligation, us-gaap:LondonInterbankOfferedRateLIBOR


Securitized
Period End2021-03-31
Value1.43
Percentage of SecuritizedDebtObligationsYieldRate40.1

bxmt:DebtFinancing, us-gaap:CollateralizedLoanObligations, us-gaap:LondonInterbankOfferedRateLIBOR


Securitized
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.890.051.7623-0.00050.01820.00270.00010.00060.0164000.00010.0173
Percentage of SecuritizedDebtObligationsYieldRate52.90.049.9166.750.60.00.00.045.60.00.00.048.1

bxmt:SecuritizedDebtObligationsYieldRate us-gaap:FinancialInstrument, us-gaap:VariableRate

bxmt:DebtFinancing, us-gaap:LondonInterbankOfferedRateLIBOR


Securitized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-0.041.720.151.5346-0.00050.01590.00150.00010.00030.016500-0.00110.0182
Percentage of SecuritizedDebtObligationsYieldRate0.048.20.043.4166.744.20.00.00.045.80.00.00.050.6

bxmt:StockIssuedDuringPeriodSharesPricePerShare us-gaap:StatementEquityComponents

bxmt:StockIssuedDuringPeriodSharesPricePerShare

us-gaap:CommonStock


Stock
Period End2020-12-312020-09-302020-05-312019-12-312019-09-302018-12-312018-08-312015-06-302015-05-312015-04-30
Value-0.39022.93-71.000.1132.629.4229.9729.75
Percentage of StockIssuedDuringPeriodSharesPricePerShare100.00.0100.0100.00.0100.0100.0100.0100.0100.0

bxmt:WeightedAverageCashCouponRate us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:VariableRate

bxmt:WeightedAverageCashCouponRate

us-gaap:LoansReceivable, us-gaap:LondonInterbankOfferedRateLIBOR


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-0.043.230.013.1383-0.0187-0.0035-0.00210.05630.00060.00090.00020.0550.00250.00030.00120.05150.001600.00030.04820.00070.0005
Percentage of WeightedAverageCashCouponRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

bxmt:WeightedAverageYieldCostRate us-gaap:Collateral, us-gaap:VariableRate

bxmt:WeightedAverageYieldCostRate

bxmt:CollateralAssets, us-gaap:LondonInterbankOfferedRateLIBOR


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value-0.284.62-0.054.6480.0030.049-0.00060.0002-0.01110.06050.03820.0006-0.0001-0.00120.04830.00080.0019-0.0104
Percentage of WeightedAverageYieldCostRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:WeightedAverageYieldCostRate us-gaap:CreditFacility, us-gaap:VariableRate

bxmt:AssetSpecificFinancings, us-gaap:LondonInterbankOfferedRateLIBOR


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.283.43-0.063.5040.00180.0342-0.00110-0.00530.0406-11789.0-2134.013923.00.01760.00020-0.0010.02580.00030.0016
Percentage of WeightedAverageYieldCostRate100.074.2120.075.460.069.8183.30.047.767.10.00.00.046.133.3-0.083.353.437.584.2

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value7.8957.9588.5248.5278.557.6297.6297.6397.5346.6096.6536.8486.0915.8185.8655.814.8554.8554.7424.593
Percentage of AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value7.8957.9588.5248.5278.557.6297.6297.6397.5346.6096.6536.8486.0915.8185.8655.814.8554.8554.7424.593
Percentage of AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Parent


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value7.8957.9588.5248.5278.557.6297.6297.6397.5346.6096.6536.8486.0915.8185.8655.814.8554.8554.7424.593
Percentage of AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdministrativeFeesExpense us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:AdministrativeFeesExpense

bxmt:ThirdPartyServices, srt:AffiliatedEntity


Administrative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value92000.0100000.0118000.098000.0138000.0133000.0158000.0106000.090000.086000.066000.090000.0153000.0141000.0
Percentage of AdministrativeFeesExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfDeferredCharges us-gaap:CreditFacility

us-gaap:AmortizationOfDeferredCharges

us-gaap:RevolvingCreditFacility


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.0970.0810.0931160001850002740002660000.2590.2540.2680.2750.3140.2510.260.2530.2430.2060.1260.128127
Percentage of AmortizationOfDeferredCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfDeferredLoanOriginationFeesNet

us-gaap:AmortizationOfDeferredLoanOriginationFeesNet


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value14141315131417111513111112119.486127.9888.8088.75111118.95410136.4815.7177.0225.0614.2323.47-9.232.831
Percentage of AmortizationOfDeferredLoanOriginationFeesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value109.1629.2819.3759.0439.7049.3147.477.9677.2657.1047.3627.36.3315.6326.8684.9534.5354.215.3775.6994.0536.0246.7294.4363.5193.0582.7392.4781.6253.5540.980.2270.1741.3860.9011.0338.8132.682.6564.2882.361.8181.885
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts us-gaap:LongtermDebtType

bxmt:ConvertibleSeniorNote


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value0.8690.8520.8490.8310.8280.8110.8070.7920.7880.7721.2891.5351.2061.1891.1711.2020.9550.7130.6980.6910.677
Percentage of AmortizationOfFinancingCostsAndDiscounts8.69.39.18.99.28.48.710.69.910.618.120.916.518.820.817.519.315.716.612.911.9

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect


Cash
Period End2021-03-312020-12-312020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-8.85-138.76120865-26.19619-21.17434-37.247.499240.829-11.876-16.265-87.506
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareCashPaid


Common
Period End2021-06-152021-03-152020-07-152014-04-15
Value0.620.620.620.48
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0

us-gaap:CostsAndExpensesRelatedParty us-gaap:InvestmentType, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:CostsAndExpensesRelatedParty

bxmt:TwentyNineteenTermLoan, bxmt:BxmtAdvisorsLimitedLiabilityCompanyAndAffiliates


Costs
Period End2021-03-312020-06-30
Value200000.0750000.0
Percentage of CostsAndExpensesRelatedParty100.0100.0

us-gaap:DebtConversionOriginalDebtAmount1 us-gaap:LongtermDebtType, us-gaap:StatementEquityComponents

us-gaap:DebtConversionOriginalDebtAmount1

bxmt:FivePointTwoFivePercentConvertibleSeniorNotes, us-gaap:CommonStock


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312016-09-282013-11-30
Value01000.00001000.00001000.0001000.01000.01000.0
Percentage of DebtConversionOriginalDebtAmount10.0100.00.00.00.0100.00.00.00.0100.00.00.0100.0100.0100.0

bxmt:FourPointThreeEightPercentConvertibleSeniorNotes, us-gaap:CommonStock


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-05-31
Value01000.00001000.00001000.0001000.01000.0
Percentage of DebtConversionOriginalDebtAmount10.0100.00.00.00.0100.00.00.00.0100.00.00.0100.00.0

us-gaap:DebtInstrumentConvertibleConversionRatio1 us-gaap:LongtermDebtType

us-gaap:DebtInstrumentConvertibleConversionRatio1

bxmt:FourPointSevenFivePercentConvertibleSeniorNotes


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value027.60500027.60500027.60500027.605
Percentage of DebtInstrumentConvertibleConversionRatio10.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.0

bxmt:FourPointThreeEightPercentConvertibleSeniorNotes


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value028.03200028.03200028.03200028.03200
Percentage of DebtInstrumentConvertibleConversionRatio10.0101.50.00.00.0101.50.00.00.0101.50.00.00.0101.50.00.0

us-gaap:DebtInstrumentIncreaseDecreaseForPeriodNet us-gaap:Ownership

us-gaap:DebtInstrumentIncreaseDecreaseForPeriodNet

bxmt:SeniorTermFacility


Debt
Period End2021-06-30
Value100
Percentage of DebtInstrumentIncreaseDecreaseForPeriodNet100.0

us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLossPeriodIncreaseDecrease

us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLossPeriodIncreaseDecrease


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-0.767-0.834-0.31-2.086-1.0034.677
Percentage of DebtSecuritiesHeldToMaturityAllowanceForCreditLossPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLossPeriodIncreaseDecrease us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AccountingStandardsUpdate201613, us-gaap:UnfundedLoanCommitment


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-7.011-2.1-2.9-7.522
Percentage of DebtSecuritiesHeldToMaturityAllowanceForCreditLossPeriodIncreaseDecrease912.6-1318.9677.4139.0747.8481.1

us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLossPeriodIncreaseDecrease us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

bxmt:CurrentExpectedCreditLossReserve


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-767.0834-0.32.11.04.7
Percentage of DebtSecuritiesHeldToMaturityAllowanceForCreditLossPeriodIncreaseDecrease100000.0-100000.096.8-100.7-99.7100.5

us-gaap:UnfundedLoanCommitment


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-7.0990000-2.02.97.519
Percentage of DebtSecuritiesHeldToMaturityAllowanceForCreditLossPeriodIncreaseDecrease912.6-118705036.0645.2-139.0-747.8412.7

us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLossPeriodIncreaseDecrease us-gaap:GeographicDistribution

us-gaap:GeographicDistributionDomestic


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-0.767-0.834-0.31-2.086-1.0034.677
Percentage of DebtSecuritiesHeldToMaturityAllowanceForCreditLossPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationArrangementWithIndividualSharesIssued

us-gaap:DeferredCompensationArrangementWithIndividualSharesIssued


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value9937.011437.012835.012713.013094.07983.07799.07731.07733.07964.07892.07811.08048.07871.07630.07656.06489.06415.06656.06695.06833.07322.06314.0
Percentage of DeferredCompensationArrangementWithIndividualSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:DerivativeGainLossOnDerivativeNet


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value3120000.0-3755000.0113000.01402000.057000.0-705000.0493000.0
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:DerivativeInstrumentRisk

us-gaap:ForeignExchangeForward


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value3801000.0-7554000.0-1732000.02236000.0153000.0-1154000.0
Percentage of DerivativeGainLossOnDerivativeNet121.8201.2-1532.7159.5268.4163.7

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:ForeignExchangeForward, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InterestIncome


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value1703000.02049000.02079000.01794000.0509000.0
Percentage of DerivativeGainLossOnDerivativeNet54.6-54.61839.8128.0893.0

us-gaap:ForeignExchangeForward, us-gaap:Nondesignated, us-gaap:InterestExpense


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value2197000.0-9328000.0-3511000.0669000.0-361000.0
Percentage of DerivativeGainLossOnDerivativeNet70.4248.4-3107.147.7-633.3

us-gaap:ForeignExchangeForward, us-gaap:Nondesignated, us-gaap:InterestIncome


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value-99000.0-275000.0-300000.0-227000.05000.0
Percentage of DerivativeGainLossOnDerivativeNet-3.27.3-265.5-16.28.8

us-gaap:DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred

us-gaap:InterestRateContract


Derivative
Period End2021-06-302021-03-312020-12-31
Value-3000.010000.03000.0
Percentage of DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value0.002-0.001-0.002-0.011-0.0090.0280.0280.004-0.0060.1680.1750.1520.1270.1090.0690.041-0.457-0.474-0.431-0.241-0.1-0.027-0.0040.00.0
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, us-gaap:InterestExpense


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-03-312017-12-312017-09-302017-06-302017-03-312016-03-31
Value0.002-0.001-0.002-0.011-0.0090.0280.0280.004-0.0060.168-387.4371520.1090.0690.041-0.457-0.474-0.027
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-221392.6100000.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, us-gaap:InterestIncome


Derivative
Period End2020-09-302020-06-302018-06-302018-03-312017-09-30
Value0.0110.0091271090.041
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet-100.0-100.0100000.0100000.0100.0

us-gaap:DifferenceBetweenReportedAmountAndReportingCurrencyDenominatedAmountValue

us-gaap:DifferenceBetweenReportedAmountAndReportingCurrencyDenominatedAmountValue


Difference
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2260000.0-9325000.0-2718000.0305000.0-274000.0-679000.0677000.0
Percentage of DifferenceBetweenReportedAmountAndReportingCurrencyDenominatedAmountValue100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock

us-gaap:DividendsCommonStock


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value9191909083838377767469676658585858585858585748303028231813
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock us-gaap:StatementEquityComponents

us-gaap:Parent


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value9191909083838377767469676658585858585858585748303028231813
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value9191909083838377767469676658585858585858585748303028231813
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents


Effect
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-994000.01703000.01596000.02494000.0-3500000.0-117000.0-893000.026000.0-29000.0-1151000.01104000.0
Percentage of EffectOfExchangeRateOnCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease

us-gaap:FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-43.155-1.449-3.477-1.0246598
Percentage of FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

bxmt:ImpairedLoans


Financing
Period End2020-12-312020-09-302020-06-30
Value0.00.069
Percentage of FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease-0.0-0.0106.6

bxmt:UniqueLoans


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-0.5230.1463.2162.7031.23224
Percentage of FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease1.2-10.1-92.5-264.01.925.0

us-gaap:FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

bxmt:UniqueLoans, us-gaap:UnfundedLoanCommitment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-0.037-0.0040.016-0.020.0170.062
Percentage of FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease0.10.3-0.52.00.00.1

us-gaap:FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:UnfundedLoanCommitment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-6.9840.99-2.026-2.945-7.53419
Percentage of FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease16.2-68.358.3287.6-11.519.5

us-gaap:FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:GeographicDistribution

us-gaap:UnfundedLoanCommitment, us-gaap:GeographicDistributionDomestic


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-4.3150.216-2.226-3.657-6.95716
Percentage of FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease10.0-14.964.0357.1-10.617.2

us-gaap:UnfundedLoanCommitment, us-gaap:GeographicDistributionForeign


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-2.6320.7780.1840.732-0.5942.219
Percentage of FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease6.1-53.7-5.3-71.5-0.92.2

us-gaap:FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease us-gaap:GeographicDistribution

us-gaap:GeographicDistributionDomestic


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-26.8611.539-7.647-10.762-3.45755
Percentage of FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease62.2-106.2219.91051.0-5.356.6

us-gaap:GeographicDistributionForeign


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-15.771-3.1340.9547.035-2.0818
Percentage of FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease36.5216.3-27.4-687.0-3.218.4

us-gaap:FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease us-gaap:UnusualOrInfrequentItem

bxmt:Covid19Pandemic


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-43.21.4-3.5-1.06598
Percentage of FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease100.1-96.6100.797.7100.1100.0

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2 bxmt:CurrentExpectedCreditLoss, us-gaap:LoanRestructuringModification

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2

bxmt:CurrentExpectedCreditLossTroubledDebtRestructuringPrincipalAmountDueIsFiftyFourPointNineMillionDollars, bxmt:ReductionInLoanSpreadAndExtensionInMaturityDate


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.02860.04.9
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.0100.00.0100.0

bxmt:CurrentExpectedCreditLossTroubledDebtRestructuringPrincipalAmountDueIsFiftyTwoPointEightMillionDollars, bxmt:ReductionInLoanSpreadAndExtensionInMaturityDate


Financing
Period End2021-03-312020-12-312020-09-30
Value52-0.1-0.3
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment218.30.0-6.1

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2 us-gaap:LoanRestructuringModification

bxmt:ReductionInLoanSpreadAndExtensionInMaturityDate


Financing
Period End2020-07-01
Value338
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.0

us-gaap:IncentiveFeeExpense us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:IncentiveFeeExpense

bxmt:BXMTAdvisorsLimitedLiabilityCompany


Incentive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value6.03.63.63.45.74.85.83.17.76.75.96.3114.44.33.74.83.33.24.26.44.25.04.50.01.2
Percentage of IncentiveFeeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value3.9020.3595.361-0.935-15.217.4323.8372.233-3.4954.7813-6.873160.3544.413-1.0362.954-1.6992.246-4.0670.006-4.254-6.294-28.02458-2.021
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value2.5322.896-1.459-1.013-6.4862.6470.823-5.3780.03.8083.3820.2565.0069.739-5.1726.1592.8562.636-3.715-2.981-1.168-2.256-0.8345.671
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndDividendIncomeOperating


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value19618718819319120422021322322420620319115514614612611811612813012312813880635850423326186.0171.4566.5176.9446.7631421253236394039
Percentage of InterestAndDividendIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDebtExcludingAmortization us-gaap:LongtermDebtType

us-gaap:InterestExpenseDebtExcludingAmortization

bxmt:ConvertibleSeniorNote


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value7.0157.0157.0147.0157.0157.0157.0147.0157.0157.0158.5269.2779.2746.7836.5276.2474.2212.2642.2642.2642.264
Percentage of InterestExpenseDebtExcludingAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityAverageOutstandingAmount us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityAverageOutstandingAmount

bxmt:AssetSpecificFinancings


Line
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-3.4-29.634229342-88793.788900
Percentage of LineOfCreditFacilityAverageOutstandingAmount100.0100.0100.0100.0100.0100.0100.0

bxmt:CreditFacilities


Line
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
Value79008100-200.0-100.09300200-200.0-300.091003001002004100440020030035003600
Percentage of LineOfCreditFacilityAverageOutstandingAmount0.00.05882.4337.82718.568.1-476.20.310.20.00.00.00.00.00.00.00.00.0

us-gaap:LineOfCreditFacilityIncreaseDecreaseForPeriodNet us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityIncreaseDecreaseForPeriodNet

bxmt:Bxmtcreditfacilities


Line
Period End2021-06-30
Value500
Percentage of LineOfCreditFacilityIncreaseDecreaseForPeriodNet100.0

us-gaap:ManagementFeeExpense

us-gaap:ManagementFeeExpense


Management
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2119191820192017201918182215141314121213151314138.0516.6716.2725.4124.413.3972.5212.4330.920.063
Percentage of ManagementFeeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ManagementFeeExpense us-gaap:RelatedPartyTransactionsByRelatedParty

bxmt:BXMTAdvisorsLimitedLiabilityCompany


Management
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value151515151414141413131212111110.09.59.69.69.69.59.49.59.39.48.15.55.44.64.43.4
Percentage of ManagementFeeExpense72.481.281.482.272.275.271.982.363.466.268.965.949.671.670.071.766.774.375.069.359.369.864.868.1100.682.486.185.099.8100.1

us-gaap:MortgageLoansOnRealEstateNewMortgageLoans

us-gaap:MortgageLoansOnRealEstateNewMortgageLoans


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-30
Value22301405407248
Percentage of MortgageLoansOnRealEstateNewMortgageLoans100.0100.0100.0100.0

us-gaap:NoninterestExpense

us-gaap:NoninterestExpense


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3229303031313027302928263124212021201921222022192314128.78196.5967.934.0483.4272.038-5.8247.1414.744.3123.9994.9414.649104.4015.1484.509
Percentage of NoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestExpenseDirectorsFees bxmt:Amendment, us-gaap:TitleOfIndividual

us-gaap:NoninterestExpenseDirectorsFees

bxmt:AmendmentOne, bxmt:BoardOfDirectors


Noninterest
Period End2021-04-30
Value210000.0
Percentage of NoninterestExpenseDirectorsFees100.0

bxmt:AmendmentOne, bxmt:CompensationAndCorporateGovernanceCommittees


Noninterest
Period End2021-04-30
Value15000.0
Percentage of NoninterestExpenseDirectorsFees7.1

us-gaap:NoninterestExpenseDirectorsFees bxmt:Amendment, us-gaap:TitleOfIndividual, us-gaap:SubsequentEventType

bxmt:AmendmentOne, bxmt:BoardOfDirectors, us-gaap:SubsequentEvent


Noninterest
Period End2021-04-30
Value210000.0
Percentage of NoninterestExpenseDirectorsFees100.0

bxmt:AmendmentOne, bxmt:CompensationAndCorporateGovernanceCommittees, us-gaap:SubsequentEvent


Noninterest
Period End2021-04-30
Value15000.0
Percentage of NoninterestExpenseDirectorsFees7.1

us-gaap:NoninterestExpenseDirectorsFees us-gaap:TitleOfIndividual

bxmt:AuditCommitteeMembers


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
Value010000.000010000.000010000.000010000.0
Percentage of NoninterestExpenseDirectorsFees0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxmt:AuditDirector


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-302017-04-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value020000.000020000.000020000.000020000.012000.012000.012000.012000.012000.012000.012000.012000.012000.0012000.0
Percentage of NoninterestExpenseDirectorsFees0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxmt:BoardOfDirectors


Noninterest
Period End2021-04-302021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-302017-04-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value175000.00175000.0000175000.0000175000.0000175000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.0125000.00125000.0
Percentage of NoninterestExpenseDirectorsFees0.083.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxmt:CompensationAndCorporateGovernanceCommittees


Noninterest
Period End2021-04-302021-06-302021-03-152021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value10000.0010000.010000.000010000.000010000.000010000.0
Percentage of NoninterestExpenseDirectorsFees0.04.80.00.00.00.00.00.00.00.00.00.00.00.00.00.0

bxmt:InvestmentRiskManagementCommittee


Noninterest
Period End2021-04-30
Value7500.0
Percentage of NoninterestExpenseDirectorsFees3.6

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value15-34.957726221-69.5168-39.961-9.5785.414-17.551-2.416-35.088103.13416207.77-24.214-10.128-21.3215.979-14.132-23.14815-20.069
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-16.09635-71.102-61.947-30.674104-50.8563510-1.78161.85524-2.826135.88212-6.66614-3.3083.3372.5142.1031.9652.2672.541-0.633-0.9994.5443.317-4.287
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

us-gaap:ForeignExchangeContract, bxmt:NetInvestment, us-gaap:InterestExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-16.09635-71.096-61.942-30.656104-50.8643510-1.646161.76324-2.953
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax100.0100.0100.0100.099.9100.1100.0100.0100.392.5101.495.0100.0104.5

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, us-gaap:InterestExpense


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-03-31
Value-0.006-0.005-0.018-0.0670.0080.013-0.033-0.1340.127
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax0.00.00.1-0.1-0.00.0-0.37.5-4.5

us-gaap:PaymentForManagementFee us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:PaymentForManagementFee

bxmt:BXMTAdvisorsLimitedLiabilityCompany


Payment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value19191920192017211918182215141314121213151314138.16.76.35.44.4
Percentage of PaymentForManagementFee100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromLoansReceivable

us-gaap:PaymentsForProceedsFromLoansReceivable


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value223014054072482699713570139711227992667102222211978128384976270285189881558639737755279037695561000740942
Percentage of PaymentsForProceedsFromLoansReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsOfFinancingCosts


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302011-12-312011-09-302011-06-302011-03-31
Value139.279126.827.41920132.38712116.0113.185.59810133.7915.9053.8952.7863.2484.0565.261.2982.22143.0533.382.278.2932.2173.1233.5690.00.00.00811
Percentage of PaymentsOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:PaymentsToMinorityShareholders

us-gaap:PaymentsToMinorityShareholders


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312015-03-312014-03-31
Value10113.2311.6653.4476.681210.4520.575
Percentage of PaymentsToMinorityShareholders100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfCommonStock


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-05-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0.00.02780.00.0080.0306651062673910.0150.0080.0080.0070.0070.0070.0060.005-0.0227.910290.0032.731252254256-0.0030.0
Percentage of ProceedsFromIssuanceOfCommonStock0.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ProceedsFromIssuanceOfCommonStock us-gaap:StatementEquityComponents

us-gaap:CommonStock


Proceeds
Period End2020-12-312020-09-302020-05-312019-12-312019-09-302019-06-302019-03-312018-12-312018-08-312018-06-302015-06-302015-05-312015-04-30
Value190.019-0.6792930.00.2415630.0653891062221023377.895683
Percentage of ProceedsFromIssuanceOfCommonStock0.00.00.0-8491.20.00.10.1100.00.00.032.899.90.0

us-gaap:ProceedsFromIssuanceOfSecuredDebt

us-gaap:ProceedsFromIssuanceOfSecuredDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value300712221382281213986361914867427213434114626531949153010319547899607178786293243185553688685676
Percentage of ProceedsFromIssuanceOfSecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromLoanOriginations1

us-gaap:ProceedsFromLoanOriginations1


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-05-152015-05-312015-06-302015-03-312013-12-312013-10-022013-09-30
Value23177.062.2463.3598.613414125.50130114318171312129.3091311106.70210590590-303.62732094271629
Percentage of ProceedsFromLoanOriginations1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromMinorityShareholders

us-gaap:ProceedsFromMinorityShareholders


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312013-12-312013-09-30
Value14130.00.3230.08.108248.093171.474.8152.0252.10.3756.0750.00.0
Percentage of ProceedsFromMinorityShareholders100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:ProceedsFromSaleAndCollectionOfLoansReceivable

us-gaap:ProceedsFromSaleAndCollectionOfLoansReceivable


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value1808862491430307620235078213434635815379641001804879529567459173190342076389833734821713119576269142951.13524
Percentage of ProceedsFromSaleAndCollectionOfLoansReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProfessionalAndContractServicesExpense us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:ProfessionalAndContractServicesExpense

bxmt:BXMTAdvisorsLimitedLiabilityCompany


Professional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value145000.040000.0161000.0416000.0205000.0218000.0334000.0335000.0242000.0188000.0264000.0167000.0215000.0190000.0296000.059000.0174000.093000.0082000.059000.0320000.0172000.000139000.0025000.0
Percentage of ProfessionalAndContractServicesExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.00.0100.00.0100.0

us-gaap:ProfessionalFees

us-gaap:ProfessionalFees


Professional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value2043000.01819000.02194000.01715000.01752000.01662000.01547000.01177000.01249000.01096000.01054000.01022000.01139000.01223000.01001000.0933000.0862000.01017000.0837000.0828000.0756000.0890000.0781000.0898000.0777000.0795000.0644000.0701000.0758000.0525000.0332000.0843000.0846000.0639000.0-1573000.0703000.01509000.0256000.0-1704000.01036000.0
Percentage of ProfessionalFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed

us-gaap:ProvisionForLoanLossesExpensed


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-50.906-1.293-5.813-6.05556122-33.328-2.8110.0-0.00815-17.152-8.088-9.161-3.665952.01
Percentage of ProvisionForLoanLossesExpensed100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReceivableWithImputedInterestEffectiveYieldInterestRate us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:VariableRate

us-gaap:ReceivableWithImputedInterestEffectiveYieldInterestRate

us-gaap:LoansReceivable, us-gaap:LondonInterbankOfferedRateLIBOR


Receivable
Period End2021-06-302021-03-312020-12-312020-09-30
Value-0.043.5603.4948
Percentage of ReceivableWithImputedInterestEffectiveYieldInterestRate100.0100.00.0100.0

us-gaap:RepaymentsOfSecuredDebt

us-gaap:RepaymentsOfSecuredDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value245487811011102930155524788761688483126513231559126522968071001672546166086146675075911333872075510.00.00.0221.251.25
Percentage of RepaymentsOfSecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0

us-gaap:RestrictedStockExpense

us-gaap:RestrictedStockExpense


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value7.8957.968.4298.5248.5278.5537.2557.6297.6297.6437.5416.6096.6536.8516.0975.8195.8655.8134.8624.8554.7424.5933.3653.0953.3033.2032.4341.5252.2891.74
Percentage of RestrictedStockExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-312020-12-31
Value15698.013273.0630.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod us-gaap:AwardType, us-gaap:StatementEquityComponents

us-gaap:RestrictedStock, us-gaap:CommonStock


Share
Period End2021-06-302021-03-312020-06-302020-03-31
Value15698.013273.00249.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod100.0100.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-312020-12-31
Value-1.1932.61-1.26
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-312020-12-31
Value026.16-5.36
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-312020-12-31
Value266980.0170940.0250780.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-312020-12-31
Value-1.4735.210
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue100.0100.00.0

us-gaap:StockIssuedDuringPeriodSharesDividendReinvestmentPlan us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesDividendReinvestmentPlan

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value434.0515.0646.0325.0335.0326.0272.0281.0409.0403.0421.0455.0430.0428.0273.0270.0258.0262.0265.0285.0
Percentage of StockIssuedDuringPeriodSharesDividendReinvestmentPlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesIssuedForServices us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesIssuedForServices

bxmt:BXMTAdvisorsLimitedLiabilityCompany, us-gaap:CommonStock


Stock
Period End2020-12-312020-06-302020-03-31
Value0840700.0840700.0
Percentage of StockIssuedDuringPeriodSharesIssuedForServices0.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:StockIssuedDuringPeriodSharesNewIssues


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-05-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-05-31
Value0.0004340.0005150.0004510.000628100.0003250.0003350.0003268.6252721.9099093.0840178.2320893.251870.000455120.0004280.0002730.000270.0002580.0002620.0002650.0002850.0001790.0001450.280025340.0001390.1000039.0441359.3558689.7750.00.025
Percentage of StockIssuedDuringPeriodSharesNewIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0

us-gaap:StockIssuedDuringPeriodSharesNewIssues us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2020-12-312020-09-302020-05-312019-12-312019-09-302019-06-302019-03-312018-12-312018-08-312018-06-302015-06-302015-05-312015-04-30
Value0.8406960.00.8406961.9096280.06.7153721.9096283.0836086.93.251449110.28002523
Percentage of StockIssuedDuringPeriodSharesNewIssues186407.10.00.0570038.20.077.9100.0100.00.0100.033.1100.00.0

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-15698.0250540.0582290.000351330.0714740.00-3564.0320900.0682530.0-4782.0-4072.0309780.0635420.008958.0277820.0627070.000209800.0489280.0
Percentage of StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures100.0100.0100.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueDividendReinvestmentPlan

us-gaap:StockIssuedDuringPeriodValueDividendReinvestmentPlan


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value14000.014000.014000.013000.012000.012000.08000.011000.014000.012000.013000.014000.013000.015000.07000.09000.07000.07000.07000.06000.03000.06000.04000.03000.0
Percentage of StockIssuedDuringPeriodValueDividendReinvestmentPlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueDividendReinvestmentPlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value197000.0190000.0174000.0165000.0162000.0151000.0146000.0143000.0137000.0131000.0128000.0122000.0117000.0114000.0108000.0105000.0101000.096000.092000.088000.083000.067000.065000.060000.056000.052000.0
Percentage of StockIssuedDuringPeriodValueDividendReinvestmentPlan1407.11357.11242.91269.21350.01258.31825.01300.0978.61091.7984.6871.4900.0760.01542.91166.71442.91371.41314.31466.72766.71116.71625.02000.00.00.0

us-gaap:Parent


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value14000.014000.014000.013000.012000.012000.08000.011000.014000.012000.013000.014000.013000.015000.07000.09000.07000.07000.07000.06000.03000.06000.04000.03000.0
Percentage of StockIssuedDuringPeriodValueDividendReinvestmentPlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-183000.0-176000.0-160000.0-152000.0-150000.0-139000.0-138000.0-132000.0-123000.0-119000.0-115000.0-108000.0-104000.0-99000.0-101000.0-96000.0-94000.0-89000.0-85000.0-82000.0-80000.0-61000.0-61000.0-57000.0-56000.0-52000.0
Percentage of StockIssuedDuringPeriodValueDividendReinvestmentPlan-1307.1-1257.1-1142.9-1169.2-1250.0-1158.3-1725.0-1200.0-878.6-991.7-884.6-771.4-800.0-660.0-1442.9-1066.7-1342.9-1271.4-1214.3-1366.7-2666.7-1016.7-1525.0-1900.00.00.0

bxmt:AccruedManagementAndIncentiveFeesPayable us-gaap:RelatedPartyTransactionsByRelatedParty

bxmt:AccruedManagementAndIncentiveFeesPayable

bxmt:BXMTAdvisorsLimitedLiabilityCompany


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value21191919201920172119181822151413141212131513146.3
Percentage of AccruedManagementAndIncentiveFeesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:BxmtAdvisorsLimitedLiabilityCompanyAndAffiliates


Accrued
Period End2020-12-31
Value19
Percentage of AccruedManagementAndIncentiveFeesPayable100.0

bxmt:AssetSpecificDebtAgreementsNet

bxmt:AssetSpecificDebtAgreementsNet


Asset
Period End2021-06-302021-03-312020-12-31
Value292430391
Percentage of AssetSpecificDebtAgreementsNet100.0100.0100.0

bxmt:AssetSpecificDebtAgreementsNet us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Asset
Period End2021-03-312020-12-31
Value430391
Percentage of AssetSpecificDebtAgreementsNet100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Asset
Period End2021-03-312020-12-31
Value438399
Percentage of AssetSpecificDebtAgreementsNet101.9102.2

bxmt:AssetSpecificDebtGross

bxmt:AssetSpecificDebtGross


Asset
Period End2021-06-302020-12-31
Value299399
Percentage of AssetSpecificDebtGross100.0100.0

bxmt:AssetSpecificDebtNet us-gaap:FairValueByMeasurementBasis

bxmt:AssetSpecificDebtNet

us-gaap:CarryingReportedAmountFairValueDisclosure


Asset
Period End2021-06-302020-12-31
Value292391
Percentage of AssetSpecificDebtNet100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Asset
Period End2021-06-302020-12-31
Value299399
Percentage of AssetSpecificDebtNet102.6102.2

bxmt:AssetspecificDebtAgreementsGross

bxmt:AssetspecificDebtAgreementsGross


Assetspecific
Period End2021-03-312020-12-312019-12-31
Value438399330
Percentage of AssetspecificDebtAgreementsGross100.0100.0100.0

bxmt:AssetspecificDebtAgreementsNet

bxmt:AssetspecificDebtAgreementsNet


Assetspecific
Period End2020-12-312019-12-31
Value391323
Percentage of AssetspecificDebtAgreementsNet100.0100.0

bxmt:AssetspecificDebtAgreementsNet us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Assetspecific
Period End2020-12-312019-12-31
Value391323
Percentage of AssetspecificDebtAgreementsNet100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Assetspecific
Period End2020-12-312019-12-31
Value399330
Percentage of AssetspecificDebtAgreementsNet102.2102.3

bxmt:AverageCompoundedSecuredOvernightFinancingRate us-gaap:CreditDerivativesByContractType, us-gaap:VariableRate

bxmt:AverageCompoundedSecuredOvernightFinancingRate

us-gaap:CreditSpreadOption, bxmt:UnitedStateDollarLiborRate


Average
Period End2021-06-30
Value0.1
Percentage of AverageCompoundedSecuredOvernightFinancingRate100.0

us-gaap:CreditSpreadOption, us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRate


Average
Period End2021-06-30
Value0.03
Percentage of AverageCompoundedSecuredOvernightFinancingRate30.0

bxmt:BookValueCollateralOfGrossLoanForAssetSpecificFinancingAgreements us-gaap:Collateral

bxmt:BookValueCollateralOfGrossLoanForAssetSpecificFinancingAgreements

bxmt:CollateralAssets


Book
Period End2021-06-302021-03-312020-12-312019-12-312016-03-312015-12-31
Value384552499417211153
Percentage of BookValueCollateralOfGrossLoanForAssetSpecificFinancingAgreements100.0100.0100.0100.0100.0100.0

bxmt:BookValueCollateralOfGrossLoanForAssetSpecificFinancingAgreements us-gaap:CreditFacility

bxmt:AssetSpecificFinancings


Book
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value4293464344173142681121041895677
Percentage of BookValueCollateralOfGrossLoanForAssetSpecificFinancingAgreements0.00.00.0100.00.00.00.00.00.00.0

bxmt:CommonStockSharesOutstandingIncludingStockEquivalents

bxmt:CommonStockSharesOutstandingIncludingStockEquivalents


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-31
Value1471471471461461351351341341251231191111081089595949494949493939358585748392928283.0180173.0164072.3191622.3173222.2773442.24349
Percentage of CommonStockSharesOutstandingIncludingStockEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:CreditSpreadAdjustment

bxmt:CreditSpreadAdjustment


Credit
Period End2021-06-30
Value0.11
Percentage of CreditSpreadAdjustment100.0

bxmt:CreditSpreadAdjustmentRate us-gaap:CreditDerivativesByContractType, us-gaap:VariableRate

bxmt:CreditSpreadAdjustmentRate

us-gaap:CreditSpreadOption, us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRate


Credit
Period End2021-06-30
Value0.11
Percentage of CreditSpreadAdjustmentRate100.0

bxmt:DailyCompoundedSterlingOvernightInterbankAverageRate us-gaap:CreditDerivativesByContractType, us-gaap:VariableRate

bxmt:DailyCompoundedSterlingOvernightInterbankAverageRate

us-gaap:CreditSpreadOption, bxmt:GreatBritainPoundLiborRate


Daily
Period End2021-06-30
Value0.08
Percentage of DailyCompoundedSterlingOvernightInterbankAverageRate100.0

us-gaap:CreditSpreadOption, bxmt:SterlingOvernightInterbankAverageRate


Daily
Period End2021-06-30
Value0.05
Percentage of DailyCompoundedSterlingOvernightInterbankAverageRate62.5

bxmt:DebtInstrumentGrossFinancingAmount us-gaap:LongtermDebtType

bxmt:DebtInstrumentGrossFinancingAmount

bxmt:TwentyTwentyTermLoan


Debt
Period End2021-06-30
Value100
Percentage of DebtInstrumentGrossFinancingAmount100.0

bxmt:DebtInstrumentRangeOfRecourseLimitation bxmt:OtherCurrencies, us-gaap:Range, us-gaap:CreditFacility

bxmt:DebtInstrumentRangeOfRecourseLimitation

bxmt:OtherCurrencies, srt:Maximum, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value100.0
Percentage of DebtInstrumentRangeOfRecourseLimitation100.0

bxmt:OtherCurrencies, srt:Minimum, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value25.0
Percentage of DebtInstrumentRangeOfRecourseLimitation25.0

bxmt:DebtInstrumentRangeOfRecourseLimitation us-gaap:Currency, us-gaap:Range, us-gaap:CreditFacility

currency:EUR, srt:Maximum, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value100.0
Percentage of DebtInstrumentRangeOfRecourseLimitation100.0

currency:EUR, srt:Minimum, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value25.0
Percentage of DebtInstrumentRangeOfRecourseLimitation25.0

currency:GBP, srt:Maximum, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value50.0
Percentage of DebtInstrumentRangeOfRecourseLimitation50.0

currency:GBP, srt:Minimum, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value25.0
Percentage of DebtInstrumentRangeOfRecourseLimitation25.0

currency:USD, srt:Maximum, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value100.0
Percentage of DebtInstrumentRangeOfRecourseLimitation100.0

currency:USD, srt:Minimum, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value25.0
Percentage of DebtInstrumentRangeOfRecourseLimitation25.0

bxmt:DebtInstrumentRangeOfRecourseLimitation us-gaap:Range, us-gaap:CreditFacility

srt:Maximum, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value100.0
Percentage of DebtInstrumentRangeOfRecourseLimitation100.0

srt:Minimum, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value25.0
Percentage of DebtInstrumentRangeOfRecourseLimitation25.0

bxmt:DebtInstrumentWeightedAverageAllInCost bxmt:TypesOfInterestRates, us-gaap:CreditFacility

bxmt:DebtInstrumentWeightedAverageAllInCost

bxmt:VariableInterestRateOnePointFiveZeroPercentToOnePointSevenFourPercent, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value1.671.65
Percentage of DebtInstrumentWeightedAverageAllInCost100.0100.0

bxmt:VariableInterestRateOnePointFourNinePercentOrLess, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value1.421.45
Percentage of DebtInstrumentWeightedAverageAllInCost85.087.9

bxmt:VariableInterestRateOnePointSevenFivePercentToOnePointNineNinePercent, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value1.841.87
Percentage of DebtInstrumentWeightedAverageAllInCost110.2113.3

bxmt:VariableInterestRateTwoPointZeroPercentOrMore, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value2.212.24
Percentage of DebtInstrumentWeightedAverageAllInCost132.3135.8

bxmt:DebtInstrumentWeightedAverageAllInCost us-gaap:CreditFacility

bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value1.781.83
Percentage of DebtInstrumentWeightedAverageAllInCost106.6110.9

bxmt:DebtInstrumentWeightedAverageAllInYield bxmt:TypesOfInterestRates, us-gaap:CreditFacility

bxmt:DebtInstrumentWeightedAverageAllInYield

bxmt:VariableInterestRateOnePointFiveZeroPercentToOnePointSevenFourPercent, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value3.323.18
Percentage of DebtInstrumentWeightedAverageAllInYield100.0100.0

bxmt:VariableInterestRateOnePointFourNinePercentOrLess, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value2.882.82
Percentage of DebtInstrumentWeightedAverageAllInYield86.788.7

bxmt:VariableInterestRateOnePointSevenFivePercentToOnePointNineNinePercent, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value3.413.54
Percentage of DebtInstrumentWeightedAverageAllInYield102.7111.3

bxmt:VariableInterestRateTwoPointZeroPercentOrMore, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value3.883.87
Percentage of DebtInstrumentWeightedAverageAllInYield116.9121.7

bxmt:DebtInstrumentWeightedAverageAllInYield us-gaap:CreditFacility

bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value3.423.4
Percentage of DebtInstrumentWeightedAverageAllInYield103.0106.9

bxmt:DebtInstrumentWeightedAverageRecourseLimitation bxmt:OtherCurrencies, us-gaap:CreditFacility

bxmt:DebtInstrumentWeightedAverageRecourseLimitation

bxmt:OtherCurrencies, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value27.0
Percentage of DebtInstrumentWeightedAverageRecourseLimitation100.0

bxmt:DebtInstrumentWeightedAverageRecourseLimitation us-gaap:CreditFacility

us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value34.0
Percentage of DebtInstrumentWeightedAverageRecourseLimitation125.9

bxmt:DebtInstrumentWeightedAverageRecourseLimitation us-gaap:Currency, us-gaap:CreditFacility

currency:EUR, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value49.0
Percentage of DebtInstrumentWeightedAverageRecourseLimitation181.5

currency:GBP, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value27.0
Percentage of DebtInstrumentWeightedAverageRecourseLimitation100.0

currency:USD, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value29.0
Percentage of DebtInstrumentWeightedAverageRecourseLimitation107.4

bxmt:DebtinstrumentGrossFinancingamount us-gaap:LongtermDebtType

bxmt:DebtinstrumentGrossFinancingamount

bxmt:TwentyTwentyTermLoan


Debtinstrument
Period End2020-12-31
Value325
Percentage of DebtinstrumentGrossFinancingamount100.0

bxmt:DeferredStockUnits us-gaap:StatementEquityComponents

bxmt:DeferredStockUnits

us-gaap:CommonStock


Deferred
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value328060.0318130.0281140.0268050.0260070.0252270.0244540.0236800.0228840.0220950.0213140.0205090.0197220.0189590.0181930.0175440.0169030.0162370.0155680.0148840.0141520.0135210.0118920.0
Percentage of DeferredStockUnits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:FloorRatePercentageOnLoanPortfolio bxmt:IndexRateFloor

bxmt:FloorRatePercentageOnLoanPortfolio

bxmt:OnePercentOrMoreFloor


Floor
Period End2021-06-30
Value1.0
Percentage of FloorRatePercentageOnLoanPortfolio100.0

bxmt:ZeroPercentOrNoFloor


Floor
Period End2021-06-30
Value0
Percentage of FloorRatePercentageOnLoanPortfolio0.0

bxmt:FloorRatePercentageOnLoanPortfolio bxmt:IndexRateFloor, us-gaap:Range

bxmt:ZeroPointTwoFivePercentToZeroPointNineNinePercent, srt:Maximum


Floor
Period End2021-06-30
Value0.99
Percentage of FloorRatePercentageOnLoanPortfolio99.0

bxmt:ZeroPointTwoFivePercentToZeroPointNineNinePercent, srt:Minimum


Floor
Period End2021-06-30
Value0.25
Percentage of FloorRatePercentageOnLoanPortfolio25.0

bxmt:ZeroPointZeroOnePercentToZeroPointTwoFourPercentFloor, srt:Maximum


Floor
Period End2021-06-30
Value0.24
Percentage of FloorRatePercentageOnLoanPortfolio24.0

bxmt:ZeroPointZeroOnePercentToZeroPointTwoFourPercentFloor, srt:Minimum


Floor
Period End2021-06-30
Value0.01
Percentage of FloorRatePercentageOnLoanPortfolio1.0

bxmt:HeldToMaturitySecuritiesFaceAmount

bxmt:HeldToMaturitySecuritiesFaceAmount


Held
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value7979797982848895979899
Percentage of HeldToMaturitySecuritiesFaceAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:HeldToMaturitySecuritiesFaceAmount us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Held
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value7776757575768692949596
Percentage of HeldToMaturitySecuritiesFaceAmount98.096.995.695.092.591.397.497.497.397.397.1

us-gaap:EstimateOfFairValueFairValueDisclosure


Held
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value7873706768738894969796
Percentage of HeldToMaturitySecuritiesFaceAmount99.593.088.585.084.187.499.399.299.098.697.6

bxmt:HeldToMaturitySecuritiesNet

bxmt:HeldToMaturitySecuritiesNet


Held
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value777675757586
Percentage of HeldToMaturitySecuritiesNet100.0100.0100.0100.0100.0100.0

bxmt:HeldToMaturitySecuritiesNet bxmt:UsGaapUnderlyingAssetClass

bxmt:TwoThousandAndEighteenSingleAssetSecuritization


Held
Period End2021-06-302020-12-31
Value7775
Percentage of HeldToMaturitySecuritiesNet100.0100.0

bxmt:HeldToMaturitySecuritiesNet bxmt:UsgaapunderlyingAssetClass

bxmt:TwoThousandAndEighteenSingleAssetSecuritization


Held
Period End2021-03-312020-12-312020-09-302020-06-30
Value76757575
Percentage of HeldToMaturitySecuritiesNet100.0100.0100.0100.0

bxmt:LoanExposureAmountIncludingNonConsolidatedSeniorInterests

bxmt:LoanExposureAmountIncludingNonConsolidatedSeniorInterests


Loan
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value99988980171673969268853340644944646648999598598798310001000110011001000
Percentage of LoanExposureAmountIncludingNonConsolidatedSeniorInterests100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:LoanPortfolioPaymentsHeldByOurThirdPartyLoanServicer

bxmt:LoanPortfolioPaymentsHeldByOurThirdPartyLoanServicer


Loan
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value808.916733.235810.656496043396.1333.9021.5494.75540.845281356.29433138122
Percentage of LoanPortfolioPaymentsHeldByOurThirdPartyLoanServicer100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:LoansExposureAmount

bxmt:LoansExposureAmount


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value18528180331745417269171741716116965153821477915053147401272612792121361109310668106139733975694371018510148
Percentage of LoansExposureAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:LoansExposureAmount us-gaap:InternalCreditAssessment

bxmt:RiskRating5


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value3383383383383340.00.0
Percentage of LoansExposureAmount1.81.91.92.01.90.00.0

bxmt:RiskRatingFour


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value2346297030453015296632741691671672020202020113
Percentage of LoansExposureAmount12.716.517.417.517.319.11.01.11.10.20.20.20.20.21.1

bxmt:RiskRatingOne


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value877681778724404354378276275255182535269314212853043614561364925
Percentage of LoansExposureAmount4.73.84.54.22.42.12.21.81.91.71.20.40.40.60.34.02.73.13.74.813.49.1

bxmt:RiskRatingThree


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value111161146010763100951030610416129121037510100104461060884008913891975196517660557295290504544102792
Percentage of LoansExposureAmount60.063.661.758.560.060.776.167.468.369.472.066.069.773.567.861.162.258.954.253.543.327.5

bxmt:RiskRatingTwo


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value3848258125283094316331153504456442354350395042723826314835213708370136794083393544096316
Percentage of LoansExposureAmount20.814.314.517.918.418.220.729.728.728.926.833.629.925.931.734.834.937.841.941.743.362.2

bxmt:LoansExposureAmount us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty

bxmt:CondominiumProperty


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value265251264252233230234225230328154158216262268273215226258315344353
Percentage of LoansExposureAmount1.41.41.51.51.41.31.41.51.62.21.01.21.72.22.42.62.02.32.63.33.43.5

bxmt:Hospitality


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2593241123692324229522712281
Percentage of LoansExposureAmount14.013.413.613.513.413.213.4

bxmt:Industrial


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value996673675877844832607704688685613
Percentage of LoansExposureAmount5.43.73.95.14.94.83.64.64.74.64.2

bxmt:LifeSciences


Loans
Period End2021-06-302021-03-312020-12-31
Value566460147
Percentage of LoansExposureAmount3.12.60.8

bxmt:SelfStorage


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value285285301294289285292281282283278
Percentage of LoansExposureAmount1.51.61.71.71.71.71.71.81.91.91.9

srt:Multifamily


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2542224018621914194720101642231222722256197319031561940
Percentage of LoansExposureAmount13.712.410.711.111.311.79.715.015.415.013.415.012.28.5

srt:OfficeBuilding


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value979910228104511010799409814102667838725871337125600659905807
Percentage of LoansExposureAmount52.956.759.958.557.957.260.551.049.147.448.347.246.852.3

srt:OtherProperty


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value92893297894610781185125911881199121048910901138942
Percentage of LoansExposureAmount5.05.25.65.56.36.97.47.78.18.03.38.68.98.5

srt:RetailSite


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value5515485515515445293813883864603503374241228
Percentage of LoansExposureAmount3.03.03.23.23.23.12.22.52.63.12.42.73.311.1

bxmt:LoansExposureAmount us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:RelatedPartyTransactionsByRelatedParty

srt:Multifamily, us-gaap:CorporateJointVenture


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value520587484566624731670537505343334222119182
Percentage of LoansExposureAmount2.83.32.83.33.64.34.03.53.42.32.31.70.91.6

bxmt:LoansExposureAmount us-gaap:StatementGeographical

bxmt:OtherEurope


Loans
Period End2021-06-302021-03-312020-12-31
Value12711036695
Percentage of LoansExposureAmount6.95.74.0

bxmt:UnitedStatesMidwest


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value96798197610291048101911801289111511781170906833759862894881704698621924617
Percentage of LoansExposureAmount5.25.45.66.06.15.97.08.47.67.87.97.16.56.37.88.48.37.27.26.69.16.1

bxmt:UnitedStatesNortheast


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value4452427740694261430142493815409740254512435938304226319128712694256625102562246121682272
Percentage of LoansExposureAmount24.023.723.324.725.024.822.526.627.230.029.630.133.026.325.925.324.225.826.326.121.322.4

bxmt:UnitedStatesNorthwest


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value15151515155352177175157239141128266286251238218293293305415
Percentage of LoansExposureAmount0.10.10.10.10.10.30.31.21.21.01.61.11.02.22.62.42.22.23.03.13.04.1

bxmt:UnitedStatesSoutheast


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value2825298227072508237624932334222224202261227120342133252024702414246718771899173920932185
Percentage of LoansExposureAmount15.216.515.514.513.814.513.814.416.415.015.416.016.720.822.322.623.219.319.518.420.621.5

bxmt:UnitedStatesSouthwest


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value7756475986066166514676305484824814805083103802902703173794438751034
Percentage of LoansExposureAmount4.23.63.43.53.63.82.84.13.73.23.33.84.02.63.42.72.63.33.94.78.610.2

bxmt:UnitedStatesWest


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value3373314234133406330431883451337029953072322226372463245128162629221221851828173315601356
Percentage of LoansExposureAmount18.217.419.619.719.218.620.321.920.320.421.920.719.320.225.424.620.822.518.718.415.313.4

country:AU


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value243247259242233320361338345332312220
Percentage of LoansExposureAmount1.31.41.51.41.41.92.12.22.32.22.11.7

country:BE


Loans
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9491878587847069717172767473
Percentage of LoansExposureAmount0.50.50.50.50.50.60.50.50.50.60.60.60.70.7

country:CA


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value68678277757277147149338313332329386412458476490483474515558
Percentage of LoansExposureAmount0.40.40.50.40.40.40.51.01.02.22.12.62.63.23.74.34.55.05.05.05.15.5

country:DE


Loans
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value252239250247251241250646365656967666462254271273296
Percentage of LoansExposureAmount1.41.41.51.41.51.61.70.40.40.50.50.60.60.60.60.62.62.92.72.9

country:ES


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-09-302016-06-302015-12-31
Value13201171125212411214118812371115106310751131116011681230696867
Percentage of LoansExposureAmount7.16.57.27.27.16.97.37.37.27.17.79.19.110.10.70.70.7

country:FR


Loans
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value3534333232
Percentage of LoansExposureAmount0.20.20.20.20.2

country:GB


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value19192196206619431997197121021667161615071094837848825794838137913171305127613401283
Percentage of LoansExposureAmount10.412.211.811.311.611.512.410.810.910.07.46.66.66.87.27.913.013.513.413.513.212.6

country:IE


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1295126513171264133313091330
Percentage of LoansExposureAmount7.07.07.67.37.87.67.8

country:IT


Loans
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value205205188180180
Percentage of LoansExposureAmount1.21.21.11.11.1

country:NL


Loans
Period End2020-12-312020-09-302020-06-302020-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value10610197957.5377.64314485756545050535960
Percentage of LoansExposureAmount0.60.60.60.60.10.10.10.40.50.50.50.50.50.60.60.6

country:US


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value12409120471178011827116631165611303117871128211665117461003010294950196879174863778127661729279287881
Percentage of LoansExposureAmount67.066.867.568.567.967.966.676.676.377.579.778.880.578.387.386.081.480.378.577.377.877.7

us-gaap:NonUs


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value6119598556735441551155045662359534963388299426952498263514061493197519212094214522562266
Percentage of LoansExposureAmount33.033.232.531.532.132.133.423.423.722.520.321.219.521.712.714.018.619.721.522.722.222.3

bxmt:LoansExposureAmount us-gaap:UnusualOrInfrequentItem

bxmt:Covid19Pandemic


Loans
Period End2020-12-312020-09-302020-06-30
Value320032003100
Percentage of LoansExposureAmount18.318.518.1

bxmt:LoansOutstandingWithUnfundedCommitments us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

bxmt:LoansOutstandingWithUnfundedCommitments

us-gaap:UnfundedLoanCommitment


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value86.079.084.083.091.094.0
Percentage of LoansOutstandingWithUnfundedCommitments100.0100.0100.0100.0100.0100.0

bxmt:LoansReceivableMeasurementInput us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:MeasurementInputType

bxmt:LoansReceivableMeasurementInput

srt:Maximum, us-gaap:FairValueInputsLevel3, us-gaap:MeasurementInputCapRate


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value4.84.84.84.80.048
Percentage of LoansReceivableMeasurementInput100.0100.0100.0100.0100.0

srt:Minimum, us-gaap:FairValueInputsLevel3, us-gaap:MeasurementInputCapRate


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value4.254.254.254.250.0425
Percentage of LoansReceivableMeasurementInput88.588.588.588.588.5

bxmt:MortgageLoansOnRealEstateAccountedForUnderCostRecoveryMethod

bxmt:MortgageLoansOnRealEstateAccountedForUnderCostRecoveryMethod


Mortgage
Period End2021-06-30
Value338
Percentage of MortgageLoansOnRealEstateAccountedForUnderCostRecoveryMethod100.0

bxmt:MortgageLoansOnRealEstatePercentageOfLoanPortfolio

bxmt:MortgageLoansOnRealEstatePercentageOfLoanPortfolio


Mortgage
Period End2021-06-302020-12-312020-06-302019-12-31
Value100.0100.01.01.0
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio100.0100.0100.0100.0

bxmt:MortgageLoansOnRealEstatePercentageOfLoanPortfolio us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty

bxmt:CondominiumProperty


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1.01.02.01.00.010.01
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio1.00.02.00.01.01.0

bxmt:Hospitality


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value14.013.014.013.00.130.13
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio14.00.014.00.013.013.0

bxmt:Industrial


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value5.04.04.05.00.050.04
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio5.00.04.00.05.04.0

bxmt:LifeSciences


Mortgage
Period End2021-06-302021-03-312020-12-31
Value3.03.01.0
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio3.00.01.0

bxmt:SelfStorage


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value2.02.02.02.00.020.02
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio2.00.02.00.02.02.0

srt:Multifamily


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value14.012.011.011.00.110.1
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio14.00.011.00.011.010.0

srt:OfficeBuilding


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value53.057.059.060.00.590.61
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio53.00.059.00.059.061.0

srt:OtherProperty


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value5.05.05.05.00.060.07
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio5.00.05.00.06.07.0

srt:RetailSite


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value3.03.03.03.00.030.02
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio3.00.03.00.03.02.0

bxmt:MortgageLoansOnRealEstatePercentageOfLoanPortfolio us-gaap:MortgageLoansOnRealEstateLoanType

bxmt:FixedRateMortgage


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.50.51.01.00.01
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio0.50.01.00.01.0

bxmt:FloatingRateMortgage


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value99.599.599.099.00.990.99
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio99.50.099.00.099.099.0

bxmt:PrepaymentRestrictionsIncludingYieldMaintenanceLockOutProvisions


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value35.035.031.042.00.510.61
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio35.00.031.00.051.061.0

bxmt:WithoutPrepaymentRestrictions


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value65.065.069.058.00.490.39
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio65.00.069.00.049.039.0

bxmt:MortgageLoansOnRealEstatePercentageOfLoanPortfolio us-gaap:StatementGeographical

bxmt:OtherEurope


Mortgage
Period End2021-06-302021-03-312020-12-31
Value7.06.04.0
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio7.00.04.0

bxmt:UnitedStatesMidwest


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value5.05.06.06.00.060.07
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio5.00.06.00.06.07.0

bxmt:UnitedStatesNortheast


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value25.024.023.025.00.250.22
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio25.00.023.00.025.022.0

bxmt:UnitedStatesSoutheast


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value15.017.016.015.00.140.14
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio15.00.016.00.014.014.0

bxmt:UnitedStatesSouthwest


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value4.04.03.04.00.040.03
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio4.00.03.00.04.03.0

bxmt:UnitedStatesWest


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value18.017.020.020.00.190.2
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio18.00.020.00.019.020.0

country:AU


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1.01.01.01.00.010.02
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio1.00.01.00.01.02.0

country:BE


Mortgage
Period End2020-12-312020-09-302020-06-302019-12-31
Value1.01.00.010.01
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio1.00.01.01.0

country:DE


Mortgage
Period End2020-12-312020-09-302020-06-302019-12-31
Value1.01.00.010.01
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio1.00.01.01.0

country:ES


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value7.07.07.07.00.070.07
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio7.00.07.00.07.07.0

country:GB


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value11.012.012.011.00.120.12
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio11.00.012.00.012.012.0

country:IE


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value7.07.08.07.00.080.08
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio7.00.08.00.08.08.0

country:IT


Mortgage
Period End2020-12-312020-09-302020-06-302019-12-31
Value1.01.00.010.01
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio1.00.01.01.0

country:NL


Mortgage
Period End2020-12-312020-09-302020-06-30
Value1.01.00.01
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio1.00.01.0

country:US


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value67.067.068.070.00.680.66
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio67.00.068.00.068.066.0

us-gaap:NonUs


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value33.033.032.030.00.320.34
Percentage of MortgageLoansOnRealEstatePercentageOfLoanPortfolio33.00.032.00.032.034.0

bxmt:MortgageLoansOnRealEstatesDeferredFeesAndOtherItems

bxmt:MortgageLoansOnRealEstatesDeferredFeesAndOtherItems


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312018-12-31
Value-92699000.0-83000000.0-80109000.0-84655000.0-95228000.0-112540000.0-102770000.0
Percentage of MortgageLoansOnRealEstatesDeferredFeesAndOtherItems100.0100.0100.0100.0100.0100.0100.0

bxmt:NonconsolidatedSecuritizedDebtExcludedFromContractualObligations

bxmt:NonconsolidatedSecuritizedDebtExcludedFromContractualObligations


Nonconsolidated
Period End2021-06-302021-03-312020-12-31
Value999616656
Percentage of NonconsolidatedSecuritizedDebtExcludedFromContractualObligations100.0100.0100.0

bxmt:NonconsolidatedSeniorInterestsExcludedFromContractualObligations

bxmt:NonconsolidatedSeniorInterestsExcludedFromContractualObligations


Nonconsolidated
Period End2021-06-302021-03-312020-12-312020-09-30
Value5438898012200
Percentage of NonconsolidatedSeniorInterestsExcludedFromContractualObligations100.0100.0100.0100.0

bxmt:NumberOfLoansCount bxmt:OtherCurrencies, us-gaap:CreditFacility

bxmt:NumberOfLoansCount

bxmt:OtherCurrencies, us-gaap:SecuredDebt


Number
Period End2021-06-30
Value5.0
Percentage of NumberOfLoansCount100.0

bxmt:NumberOfLoansCount us-gaap:CreditFacility

us-gaap:SecuredDebt


Number
Period End2021-06-30
Value113.0
Percentage of NumberOfLoansCount2260.0

bxmt:NumberOfLoansCount us-gaap:Currency, us-gaap:CreditFacility

currency:EUR, us-gaap:SecuredDebt


Number
Period End2021-06-30
Value9.0
Percentage of NumberOfLoansCount180.0

currency:GBP, us-gaap:SecuredDebt


Number
Period End2021-06-30
Value11.0
Percentage of NumberOfLoansCount220.0

currency:USD, us-gaap:SecuredDebt


Number
Period End2021-06-30
Value88.0
Percentage of NumberOfLoansCount1760.0

bxmt:OneMonthUsdLiborReferenceRate us-gaap:VariableRate

bxmt:OneMonthUsdLiborReferenceRate

us-gaap:LondonInterbankOfferedRateLIBOR


One
Period End2021-06-30
Value0.1
Percentage of OneMonthUsdLiborReferenceRate100.0

bxmt:PercentageOfSeniorLoanBorrowedOverMortgageLoansOnRealEstateFaceAmountOfMortgages us-gaap:Ownership

bxmt:PercentageOfSeniorLoanBorrowedOverMortgageLoansOnRealEstateFaceAmountOfMortgages

bxmt:SeniorTermFacility


Percentage
Period End2021-06-30
Value22.0
Percentage of PercentageOfSeniorLoanBorrowedOverMortgageLoansOnRealEstateFaceAmountOfMortgages100.0

bxmt:PercentageOfTotalSecuredTermLoans us-gaap:InvestmentType, us-gaap:RelatedPartyTransactionsByRelatedParty

bxmt:PercentageOfTotalSecuredTermLoans

bxmt:TwentyNineteenTermLoan, bxmt:BlackstoneAdvisedInvestmentVehiclesOrTheFunds


Percentage
Period End2021-03-31
Value3.0
Percentage of PercentageOfTotalSecuredTermLoans100.0

bxmt:PrincipalCollateralOfGrossLoanForAssetSpecificFinancingAgreements us-gaap:Collateral

bxmt:PrincipalCollateralOfGrossLoanForAssetSpecificFinancingAgreements

bxmt:CollateralAssets


Principal
Period End2021-06-302021-03-312020-12-312019-12-312016-03-312015-12-31
Value397566512429214154
Percentage of PrincipalCollateralOfGrossLoanForAssetSpecificFinancingAgreements100.0100.0100.0100.0100.0100.0

bxmt:PrincipalCollateralOfGrossLoanForAssetSpecificFinancingAgreements us-gaap:CreditFacility

bxmt:AssetSpecificFinancings


Principal
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value4433564454293262811221061905682
Percentage of PrincipalCollateralOfGrossLoanForAssetSpecificFinancingAgreements0.00.00.0100.00.00.00.00.00.00.0

bxmt:SecuredDebtFinancingAgreements us-gaap:CreditFacility

bxmt:SecuredDebtFinancingAgreements

bxmt:AssetSpecificFinancings


Secured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312016-03-312015-12-31
Value29243039134027934032324120991801492517154111
Percentage of SecuredDebtFinancingAgreements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:SecuredDebtRepurchaseAgreementsFaceAmount

bxmt:SecuredDebtRepurchaseAgreementsFaceAmount


Secured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value87298142789690009716936710083881682839235153818851607518517530567679653490
Percentage of SecuredDebtRepurchaseAgreementsFaceAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:SecuredDebtRepurchaseAgreementsFaceAmount us-gaap:CreditFacility

bxmt:AssetSpecificFinancings


Secured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value299438399348285347330249217971538149918851607518517530567679653490157111
Percentage of SecuredDebtRepurchaseAgreementsFaceAmount3.45.45.13.92.93.73.32.82.61.1100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:SecuredDebt


Secured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value87298142789686519431901997538567806590938870
Percentage of SecuredDebtRepurchaseAgreementsFaceAmount100.0100.0100.096.197.196.396.797.297.498.5576.6

bxmt:SecuredDebtRepurchaseAgreementsGross

bxmt:SecuredDebtRepurchaseAgreementsGross


Secured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value8729814278969000971693671008388168283923589966862704460185290609658235776573153356214632961312365
Percentage of SecuredDebtRepurchaseAgreementsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:SecuritizedDebtObligationCarryingValue us-gaap:Collateral

bxmt:SecuritizedDebtObligationCarryingValue

bxmt:CollateralAssets


Securitized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value350037363785282929052934160716981693168816781675167116651652
Percentage of SecuritizedDebtObligationCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:SecuritizedDebtObligationCarryingValue us-gaap:Collateral, us-gaap:UnderlyingAssetClass

bxmt:CollateralAssets, bxmt:AssetSecuritization


Securitized
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value619618615687716710698693688678675671665652
Percentage of SecuritizedDebtObligationCarryingValue16.616.321.723.724.444.241.140.940.840.440.340.239.939.5

bxmt:CollateralAssets, bxmt:TwentyTwentyFltwoCollateralizedLoanObligation


Securitized
Period End2020-12-31
Value1500
Percentage of SecuritizedDebtObligationCarryingValue39.6

bxmt:CollateralAssets, bxmt:TwentyTwentyOneFlFourCollateralizedLoanObligation


Securitized
Period End2021-06-30
Value1000
Percentage of SecuritizedDebtObligationCarryingValue28.6

bxmt:CollateralAssets, us-gaap:CollateralizedLoanObligations


Securitized
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value61766671371771789710001000100010001000100010001000
Percentage of SecuritizedDebtObligationCarryingValue16.517.625.224.724.555.858.959.159.259.659.759.860.160.5

bxmt:SecuritizedDebtObligationCarryingValue us-gaap:FinancialInstrument

bxmt:DebtFinancing


Securitized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value283328752922216822402239118712881287128612851284128312821282
Percentage of SecuritizedDebtObligationCarryingValue81.076.977.276.677.176.373.875.976.076.276.676.776.877.077.6

bxmt:SecuritizedDebtObligationCarryingValue us-gaap:FinancialInstrument, us-gaap:UnderlyingAssetClass

bxmt:DebtFinancing, bxmt:AssetSecuritization


Securitized
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value404404404474533474474474474474474474474474
Percentage of SecuritizedDebtObligationCarryingValue10.810.714.316.318.229.527.928.028.128.328.328.428.528.7

bxmt:DebtFinancing, bxmt:CollateralizedLoanObligations2020


Securitized
Period End2020-09-302020-06-302020-03-31
Value123212311231
Percentage of SecuritizedDebtObligationCarryingValue43.642.442.0

bxmt:DebtFinancing, bxmt:TwentyTwentyFlThreeCollateralizedLoanObligation


Securitized
Period End2021-06-302021-03-312020-12-31
Value802801800
Percentage of SecuritizedDebtObligationCarryingValue22.921.521.2

bxmt:DebtFinancing, bxmt:TwentyTwentyFlTwoCollateralizedLoanObligation


Securitized
Period End2021-06-302021-03-312020-12-31
Value123412341233
Percentage of SecuritizedDebtObligationCarryingValue35.333.032.6

bxmt:DebtFinancing, bxmt:TwentyTwentyFlthreeCollateralizedLoanObligation


Securitized
Period End2020-12-31
Value800
Percentage of SecuritizedDebtObligationCarryingValue21.2

bxmt:DebtFinancing, bxmt:TwentyTwentyFltwoCollateralizedLoanObligation


Securitized
Period End2020-12-31
Value1233
Percentage of SecuritizedDebtObligationCarryingValue32.6

bxmt:DebtFinancing, bxmt:TwentyTwentyOneFlFourCollateralizedLoanObligation


Securitized
Period End2021-06-30
Value796
Percentage of SecuritizedDebtObligationCarryingValue22.8

bxmt:DebtFinancing, us-gaap:CollateralizedLoanObligations


Securitized
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value434483530534474712813812811811809808807808
Percentage of SecuritizedDebtObligationCarryingValue11.612.818.818.416.244.347.948.048.148.348.348.448.548.9

bxmt:SecuritizedDebtObligations us-gaap:Collateral

bxmt:SecuritizedDebtObligations

bxmt:CollateralAssets


Securitized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value350037373785282929062934160917001695169116821678167516681656
Percentage of SecuritizedDebtObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:SecuritizedDebtObligations us-gaap:Collateral, us-gaap:UnderlyingAssetClass

bxmt:CollateralAssets, bxmt:AssetSecuritization


Securitized
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value619619615688716711700695691682678675668656
Percentage of SecuritizedDebtObligations16.616.421.823.724.444.241.241.040.940.640.440.340.139.6

bxmt:CollateralAssets, bxmt:TwentyTwentyFlthreeCollateralizedLoanObligation


Securitized
Period End2020-12-31
Value1000
Percentage of SecuritizedDebtObligations26.4

bxmt:CollateralAssets, bxmt:TwentyTwentyFltwoCollateralizedLoanObligation


Securitized
Period End2020-12-31
Value1500
Percentage of SecuritizedDebtObligations39.6

bxmt:CollateralAssets, bxmt:TwentyTwentyOneFlFourCollateralizedLoanObligation


Securitized
Period End2021-06-30
Value1000
Percentage of SecuritizedDebtObligations28.6

bxmt:CollateralAssets, us-gaap:CollateralizedLoanObligations


Securitized
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value61766671371771789710001000100010001000100010001000
Percentage of SecuritizedDebtObligations16.517.625.224.724.555.858.859.059.159.459.659.759.960.4

bxmt:SecuritizedDebtObligations us-gaap:FinancialInstrument

bxmt:DebtFinancing


Securitized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value285528912940217922532253118912921292129212921292129212921292
Percentage of SecuritizedDebtObligations81.677.477.777.077.576.873.976.076.276.476.877.077.177.478.0

bxmt:SecuritizedDebtObligations us-gaap:FinancialInstrument, us-gaap:UnderlyingAssetClass

bxmt:DebtFinancing, bxmt:AssetSecuritization


Securitized
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value404404404474535474474474474474474474474474
Percentage of SecuritizedDebtObligations10.810.714.316.318.229.527.928.028.128.228.328.328.428.7

bxmt:DebtFinancing, bxmt:TwentyTwentyFlthreeCollateralizedLoanObligation


Securitized
Period End2020-12-31
Value808
Percentage of SecuritizedDebtObligations21.4

bxmt:DebtFinancing, bxmt:TwentyTwentyFltwoCollateralizedLoanObligation


Securitized
Period End2020-12-31
Value1243
Percentage of SecuritizedDebtObligations32.8

bxmt:DebtFinancing, bxmt:TwentyTwentyOneFlFourCollateralizedLoanObligation


Securitized
Period End2021-06-30
Value803
Percentage of SecuritizedDebtObligations23.0

bxmt:DebtFinancing, us-gaap:CollateralizedLoanObligations


Securitized
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value434483531535474715817817817817817817817817
Percentage of SecuritizedDebtObligations11.612.818.818.416.244.448.148.248.348.648.748.849.049.4

bxmt:SecuritizedDebtObligationsExcludedFromContractualObligations

bxmt:SecuritizedDebtObligationsExcludedFromContractualObligations


Securitized
Period End2021-06-302021-03-312020-12-312020-09-30
Value290029002900716
Percentage of SecuritizedDebtObligationsExcludedFromContractualObligations100.0100.0100.0100.0

bxmt:SecuritizedDebtObligationsNet

bxmt:SecuritizedDebtObligationsNet


Securitized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value2833287529222168224022391187128812871286128512841283128212824744740.0
Percentage of SecuritizedDebtObligationsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

bxmt:SecuritizedDebtObligationsNet us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Securitized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value283328752922216822402239118712881287128612851284128312821282474474
Percentage of SecuritizedDebtObligationsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Securitized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value205528902923213621721993118912921291129012831297129412921292474476
Percentage of SecuritizedDebtObligationsNet72.5100.5100.098.597.089.0100.2100.3100.3100.399.8101.0100.9100.8100.8100.1100.5

bxmt:SecuritizedDebtObligationsNetFaceAmount

bxmt:SecuritizedDebtObligationsNetFaceAmount


Securitized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value285528912940217922532253118912921292129212921292129212921292
Percentage of SecuritizedDebtObligationsNetFaceAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:SharesIssuedWeightedAveragePricePerShare

bxmt:SharesIssuedWeightedAveragePricePerShare


Shares
Period End2020-09-30
Value27.79
Percentage of SharesIssuedWeightedAveragePricePerShare100.0

bxmt:SharesIssuedWeightedAveragePricePerShare us-gaap:TitleOfIndividual, us-gaap:StatementClassOfStock

bxmt:Manager, us-gaap:CommonClassA


Shares
Period End2020-12-31
Value22.93
Percentage of SharesIssuedWeightedAveragePricePerShare0.0

bxmt:StockIssuedDuringPeriodSharesWeightedAveragePricePerShare

bxmt:StockIssuedDuringPeriodSharesWeightedAveragePricePerShare


Stock
Period End2020-09-30
Value27.52
Percentage of StockIssuedDuringPeriodSharesWeightedAveragePricePerShare100.0

bxmt:TaxBasisOfMortgageLoans

bxmt:TaxBasisOfMortgageLoans


Tax
Period End2020-12-31
Value15200
Percentage of TaxBasisOfMortgageLoans100.0

bxmt:TermLoansNet

bxmt:TermLoansNet


Term
Period End2021-06-302020-12-31
Value13321041
Percentage of TermLoansNet100.0100.0

bxmt:ThirtyDayAverageCompoundedSOFRReferenceRate us-gaap:VariableRate

bxmt:ThirtyDayAverageCompoundedSOFRReferenceRate

us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRate


Thirty
Period End2021-06-30
Value0.03
Percentage of ThirtyDayAverageCompoundedSOFRReferenceRate100.0

bxmt:UnfundedCommitmentsMaximumAdvanceAmount us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

bxmt:UnfundedCommitmentsMaximumAdvanceAmount

us-gaap:LoansReceivable


Unfunded
Period End2021-06-302021-03-312020-12-312020-09-30
Value2400240022002300
Percentage of UnfundedCommitmentsMaximumAdvanceAmount100.0100.0100.0100.0

bxmt:UnfundedCommitmentsRelatedToLoansReceivable us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

bxmt:UnfundedCommitmentsRelatedToLoansReceivable

us-gaap:LoansReceivable


Unfunded
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value340035003200330036003905391147243217312334053046299014731573162213891149882929907965700738791550513513164
Percentage of UnfundedCommitmentsRelatedToLoansReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:UnfundedCommitmentsRelatedToLoansReceivable us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:UnfundedLoanCommitment


Unfunded
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value340035003200330036003.9
Percentage of UnfundedCommitmentsRelatedToLoansReceivable100.0100.0100.0100.0100.00.1

bxmt:VariableInterestEntityConsolidatedCarryingAmountAssetsNet us-gaap:ConsolidatedEntities, us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

bxmt:VariableInterestEntityConsolidatedCarryingAmountAssetsNet

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:LoansReceivable


Variable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value336535303506262826291349
Percentage of VariableInterestEntityConsolidatedCarryingAmountAssetsNet100.0100.0100.0100.0100.0100.0

bxmt:VariableInterestEntityConsolidatedCarryingAmountCurrentExpectedCreditLossReserve us-gaap:ConsolidatedEntities, us-gaap:BalanceSheetLocation

bxmt:VariableInterestEntityConsolidatedCarryingAmountCurrentExpectedCreditLossReserve

us-gaap:VariableInterestEntityPrimaryBeneficiary, bxmt:CurrentExpectedCreditLossReserve


Variable
Period End2021-06-302021-03-312020-12-312020-09-30
Value-4009000.0-13623000.0-13454000.0-12341000.0
Percentage of VariableInterestEntityConsolidatedCarryingAmountCurrentExpectedCreditLossReserve100.0100.0100.0100.0

bxmt:WeightedAverageIndexRateFloorRatePercentageOnLoanPortfolio bxmt:IndexRateFloor

bxmt:WeightedAverageIndexRateFloorRatePercentageOnLoanPortfolio

bxmt:ExcludingZeroPercentFloor


Weighted
Period End2021-06-30
Value1.12
Percentage of WeightedAverageIndexRateFloorRatePercentageOnLoanPortfolio100.0

bxmt:IncludingZeroPercentFloor


Weighted
Period End2021-06-30
Value0.67
Percentage of WeightedAverageIndexRateFloorRatePercentageOnLoanPortfolio59.8

bxmt:WeightedAverageRiskRatingOnLoanExposure

bxmt:WeightedAverageRiskRatingOnLoanExposure


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value2.93.03.03.03.03.02.82.72.72.72.72.72.72.72.62.62.62.52.52.32.2
Percentage of WeightedAverageRiskRatingOnLoanExposure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312018-12-312018-09-302018-06-302017-12-31
Value17529171431665216553164341627714293122601230310108
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages bxmt:IndexRateFloor

bxmt:FixedRate


Mortgage
Period End2021-06-30
Value80
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages0.5

bxmt:OnePercentOrMoreFloor


Mortgage
Period End2021-06-30
Value7028
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages40.1

bxmt:ZeroPercentOrNoFloor


Mortgage
Period End2021-06-30
Value7294
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages41.6

bxmt:ZeroPointTwoFivePercentToZeroPointNineNinePercent


Mortgage
Period End2021-06-30
Value1294
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages7.4

bxmt:ZeroPointZeroOnePercentToZeroPointTwoFourPercentFloor


Mortgage
Period End2021-06-30
Value1830
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages10.4

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages bxmt:IndexRateFloor, bxmt:OtherCurrency

bxmt:FixedRate, bxmt:NonUSD


Mortgage
Period End2021-06-30
Value80
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages0.5

bxmt:OnePercentOrMoreFloor, bxmt:NonUSD


Mortgage
Period End2021-06-30
Value622
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages3.6

bxmt:ZeroPercentOrNoFloor, bxmt:NonUSD


Mortgage
Period End2021-06-30
Value4769
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages27.2

bxmt:ZeroPointTwoFivePercentToZeroPointNineNinePercent, bxmt:NonUSD


Mortgage
Period End2021-06-30
Value262
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages1.5

bxmt:ZeroPointZeroOnePercentToZeroPointTwoFourPercentFloor, bxmt:NonUSD


Mortgage
Period End2021-06-30
Value110
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages0.6

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages bxmt:IndexRateFloor, us-gaap:Currency

bxmt:OnePercentOrMoreFloor, currency:USD


Mortgage
Period End2021-06-30
Value6406
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages36.5

bxmt:ZeroPercentOrNoFloor, currency:USD


Mortgage
Period End2021-06-30
Value2525
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages14.4

bxmt:ZeroPointTwoFivePercentToZeroPointNineNinePercent, currency:USD


Mortgage
Period End2021-06-30
Value1031
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages5.9

bxmt:ZeroPointZeroOnePercentToZeroPointTwoFourPercentFloor, currency:USD


Mortgage
Period End2021-06-30
Value1720
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages9.8

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages bxmt:OtherCurrency

bxmt:NonUSD


Mortgage
Period End2021-06-30
Value5845
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages33.3

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:LoansReceivable


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value175291714316652165531643416277
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages100.0100.0100.0100.0100.0100.0

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages us-gaap:Currency

currency:USD


Mortgage
Period End2021-06-30
Value11683
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages66.7

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages us-gaap:MajorCustomers, us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:StatementGeographical

bxmt:BorrowerA, bxmt:SeniorMortgageLoansInExcessOfThreePercentageOfCarryingAmountOfLoans, srt:OfficeBuilding, country:IE


Mortgage
Period End2020-12-312019-12-31
Value13171330
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages7.98.2

bxmt:BorrowerB, bxmt:SeniorMortgageLoansInExcessOfThreePercentageOfCarryingAmountOfLoans, bxmt:MixedUse, country:ES


Mortgage
Period End2020-12-312019-12-31
Value9931008
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages6.06.2

bxmt:BorrowerC, bxmt:SeniorMortgageLoansInExcessOfThreePercentageOfCarryingAmountOfLoans, srt:OfficeBuilding, bxmt:Northeast


Mortgage
Period End2020-12-31
Value653
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages3.9

bxmt:BorrowerD, bxmt:SeniorMortgageLoansInExcessOfThreePercentageOfCarryingAmountOfLoans, srt:OfficeBuilding, bxmt:Southeast


Mortgage
Period End2020-12-31
Value619
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages3.7

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory

bxmt:SeniorMortgageLoansLessThanThreePercentageOfCarryingAmountOfLoans


Mortgage
Period End2020-12-312019-12-312018-12-31
Value128681247412378
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages77.376.686.6

us-gaap:FirstMortgage


Mortgage
Period End2020-12-312019-12-312018-12-31
Value164511611114192
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages98.899.099.3

us-gaap:SecondMortgage


Mortgage
Period End2020-12-312019-12-312018-12-31
Value201165101
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages1.21.00.7

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:StatementGeographical

bxmt:SeniorMortgageLoansLessThanThreePercentageOfCarryingAmountOfLoans, bxmt:Hospitality, bxmt:DiversifiedLocation


Mortgage
Period End2020-12-31
Value2097
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages12.6

bxmt:SeniorMortgageLoansLessThanThreePercentageOfCarryingAmountOfLoans, bxmt:Industrial, bxmt:DiversifiedLocation


Mortgage
Period End2020-12-312019-12-312018-12-31
Value515676565
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages3.14.24.0

bxmt:SeniorMortgageLoansLessThanThreePercentageOfCarryingAmountOfLoans, bxmt:MixedUse, bxmt:DiversifiedLocation


Mortgage
Period End2020-12-312019-12-312018-12-31
Value1540784686
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages9.34.84.8

bxmt:SeniorMortgageLoansLessThanThreePercentageOfCarryingAmountOfLoans, srt:Multifamily, bxmt:DiversifiedLocation


Mortgage
Period End2020-12-312019-12-312018-12-31
Value119812521878
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages7.27.713.1

bxmt:SeniorMortgageLoansLessThanThreePercentageOfCarryingAmountOfLoans, srt:OfficeBuilding, bxmt:DiversifiedLocation


Mortgage
Period End2020-12-312019-12-312018-12-31
Value697070246424
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages41.943.244.9

bxmt:SeniorMortgageLoansLessThanThreePercentageOfCarryingAmountOfLoans, srt:OtherProperty, bxmt:DiversifiedLocation


Mortgage
Period End2020-12-312019-12-312018-12-31
Value54570198
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages3.34.30.7

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty

bxmt:SeniorTermFacility, bxmt:BlackstoneAdvisedInvestmentVehiclesOrTheFunds


Mortgage
Period End2021-06-302021-03-312020-03-312019-12-312019-09-302019-06-302019-03-31
Value49110200421388437391490
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages2.859.50.02.40.00.00.0

srt:MortgageLoansOnRealEstatePriorLiens1

srt:MortgageLoansOnRealEstatePriorLiens1


Mortgage
Period End2020-12-312019-12-312018-12-31
Value801688446
Percentage of MortgageLoansOnRealEstatePriorLiens1100.0100.0100.0

srt:MortgageLoansOnRealEstatePriorLiens1 us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory

us-gaap:SecondMortgage


Mortgage
Period End2020-12-312019-12-312018-12-31
Value801688446
Percentage of MortgageLoansOnRealEstatePriorLiens1100.0100.0100.0

us-gaap:AccountsPayableAndOtherAccruedLiabilities

us-gaap:AccountsPayableAndOtherAccruedLiabilities


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value7725000.03784000.02671000.03743000.04114000.06453000.05008000.06849000.05631000.03950000.04583000.03426000.03577000.02782000.02125000.02633000.03264000.01736000.01985000.0
Percentage of AccountsPayableAndOtherAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value23394.86612815064115796870545227303139475136311825
Percentage of AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-13.0-28.6-6.4-75.8-137.8-168.5-80.7-148.8-108.8-99.3-104.6-87.1-84.7-49.6-60.3-63.5-79.6-99.7-107.583735157
Percentage of AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForLoanAndLeaseLossesRealEstate

us-gaap:AllowanceForLoanAndLeaseLossesRealEstate


Allowance
Period End2021-06-302021-03-312020-12-312020-09-30
Value128172173177
Percentage of AllowanceForLoanAndLeaseLossesRealEstate100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:CashAndCashEquivalentsFairValueDisclosure


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2892802894271259355150848079105
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value28928028942712593551508480791058610757696133647594181110961381041851631207052105915
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value28928028942712593551508480791058610757696133647596
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:CollateralAlreadyPostedAggregateFairValue

us-gaap:CollateralAlreadyPostedAggregateFairValue


Collateral
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312018-09-302018-03-312017-12-312017-09-302016-12-31
Value2.71519.3522307.366.594.127.750.079
Percentage of CollateralAlreadyPostedAggregateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockCapitalSharesReservedForFutureIssuance us-gaap:PlanName

us-gaap:CommonStockCapitalSharesReservedForFutureIssuance

bxmt:DividendReinvestmentAndDirectStockPurchasePlan


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-03-25
Value9991000.09991500.09992000.09992400.09993100.09993700.09994000.09994400.09994700.09995000.09995200.09995600.09996000.09996500.09996900.09997400.09997800.09998100.09998300.09998600.010000000.0
Percentage of CommonStockCapitalSharesReservedForFutureIssuance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConvertibleDebtFairValueDisclosures us-gaap:FairValueByMeasurementBasis

us-gaap:ConvertibleDebtFairValueDisclosures

us-gaap:CarryingReportedAmountFairValueDisclosure


Convertible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value618617616615614613613612611610609780779778563562448167166166165164164163163162161161160160159
Percentage of ConvertibleDebtFairValueDisclosures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Convertible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value637639621599580490665653649627605832808811610602493194191171
Percentage of ConvertibleDebtFairValueDisclosures103.1103.6100.897.394.579.9108.6106.7106.2102.799.3106.6103.7104.3108.2107.1110.1116.4115.0104.5

us-gaap:ConvertibleNotesPayable

us-gaap:ConvertibleNotesPayable


Convertible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value618617616615614613613612611610609780779778563562448167166166165164164163163162161161160160159
Percentage of ConvertibleNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConvertibleNotesPayable us-gaap:LongtermDebtType

bxmt:ConvertibleSeniorNote


Convertible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value618617616615614613613612611610609780779778563562448166
Percentage of ConvertibleNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCollateralAmount

us-gaap:DebtInstrumentCollateralAmount


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value12322120401291412598121581315711729
Percentage of DebtInstrumentCollateralAmount100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCollateralAmount bxmt:OtherCurrencies, us-gaap:CreditFacility

bxmt:OtherCurrencies, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value895
Percentage of DebtInstrumentCollateralAmount0.0

us-gaap:DebtInstrumentCollateralAmount bxmt:TypesOfInterestRates, us-gaap:CreditFacility

bxmt:VariableInterestRateOnePointFiveZeroPercentToOnePointSevenFourPercent, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value39814173
Percentage of DebtInstrumentCollateralAmount0.034.7

bxmt:VariableInterestRateOnePointFourNinePercentOrLess, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value25201851
Percentage of DebtInstrumentCollateralAmount0.015.4

bxmt:VariableInterestRateOnePointSevenFivePercentToOnePointNineNinePercent, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value27552459
Percentage of DebtInstrumentCollateralAmount0.020.4

bxmt:VariableInterestRateTwoPointZeroPercentOrMore, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value39643556
Percentage of DebtInstrumentCollateralAmount0.029.5

us-gaap:DebtInstrumentCollateralAmount us-gaap:CounterpartyName, us-gaap:CreditFacility

bxmt:BankOfAmerica, bxmt:CreditFacilities


Debt
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
Value658667761750749775840962992109010911083820765818816813794
Percentage of DebtInstrumentCollateralAmount5.35.55.96.06.25.90.00.00.09.30.00.00.00.00.00.00.00.0

bxmt:BankOfAmericaMultifamilyJointVenture, bxmt:CreditFacilities


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value224242725828123122121744911210687
Percentage of DebtInstrumentCollateralAmount0.20.30.30.60.40.00.00.01.00.00.00.00.00.0

bxmt:Barclays, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2156186220972110202320441246116611131113771620
Percentage of DebtInstrumentCollateralAmount17.515.516.216.816.615.50.00.00.09.50.00.0

bxmt:Citibank, bxmt:CreditFacilities


Debt
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
Value1277121212281189117814731386127811141030730719548455596394509508
Percentage of DebtInstrumentCollateralAmount10.410.19.59.49.711.20.00.00.08.80.00.00.00.00.00.00.00.0

bxmt:DeutscheBank, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2494286928832673249425732185235323571193380373360399393377374
Percentage of DebtInstrumentCollateralAmount20.223.822.321.220.519.60.00.00.010.20.00.00.00.00.00.00.0

bxmt:GoldmanSachs, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value806828802781727632426401314295
Percentage of DebtInstrumentCollateralAmount6.56.96.26.26.04.80.00.00.02.5

bxmt:GoldmanSachsMultifamilyJointVenture, bxmt:CreditFacilities


Debt
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
Value29423125130630626127929322121214869427559
Percentage of DebtInstrumentCollateralAmount2.41.91.92.42.52.00.00.00.01.80.00.00.00.00.0

bxmt:JPMorgan, bxmt:CreditFacilities


Debt
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
Value610605578558509386130312211357626564474558579453324359550
Percentage of DebtInstrumentCollateralAmount5.05.04.54.44.22.90.00.00.05.30.00.00.00.00.00.00.00.0

bxmt:Metlife, bxmt:CreditFacilities


Debt
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
Value3563495565565455365242968578529461041105110391030101311041106
Percentage of DebtInstrumentCollateralAmount2.92.94.34.44.54.10.00.00.07.30.00.00.00.00.00.00.00.0

bxmt:MorganStanley, bxmt:CreditFacilities


Debt
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
Value854849812786670706658576589457461460594591422411329344
Percentage of DebtInstrumentCollateralAmount6.97.16.36.25.55.40.00.00.03.90.00.00.00.00.00.00.00.0

bxmt:Santander, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value324337320306298299179
Percentage of DebtInstrumentCollateralAmount2.62.82.52.42.52.30.0

bxmt:SocieteGenerale, bxmt:CreditFacilities


Debt
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
Value309308303301300437428419410404298294375373332456281274
Percentage of DebtInstrumentCollateralAmount2.52.62.42.42.53.30.00.00.03.40.00.00.00.00.00.00.00.0

bxmt:UsBankMultiJv, bxmt:CreditFacilities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value293231272275352350230
Percentage of DebtInstrumentCollateralAmount2.41.92.12.22.92.70.0

bxmt:WellsFargo, bxmt:CreditFacilities


Debt
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
Value188516632002196019282621213522852556185315771822160316802232199318951718
Percentage of DebtInstrumentCollateralAmount15.313.815.515.615.919.90.00.00.015.80.00.00.00.00.00.00.00.0

us-gaap:DebtInstrumentCollateralAmount us-gaap:CreditFacility

bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1322212040118521137912007925270467009606860646424578856675297
Percentage of DebtInstrumentCollateralAmount0.0100.00.00.00.078.90.00.00.00.00.00.00.00.0

bxmt:CreditFacilitiesSix


Debt
Period End2021-06-30
Value2600
Percentage of DebtInstrumentCollateralAmount0.0

us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value13222
Percentage of DebtInstrumentCollateralAmount0.0

us-gaap:DebtInstrumentCollateralAmount us-gaap:Currency, us-gaap:CreditFacility

currency:EUR, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value3258
Percentage of DebtInstrumentCollateralAmount0.0

currency:GBP, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value1630
Percentage of DebtInstrumentCollateralAmount0.0

currency:USD, us-gaap:SecuredDebt


Debt
Period End2021-06-30
Value7437
Percentage of DebtInstrumentCollateralAmount0.0

us-gaap:DebtInstrumentFaceAmount us-gaap:LongtermDebtType

us-gaap:DebtInstrumentFaceAmount

bxmt:ConvertibleSeniorNote


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value622622622622622622622622622622622794794795575575460172
Percentage of DebtInstrumentFaceAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:FourPointThreeEightPercentConvertibleSeniorNotes


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value402402402402402402402402402402402402402402402402287
Percentage of DebtInstrumentFaceAmount64.764.764.764.764.764.764.764.764.764.764.750.650.650.670.070.062.5

bxmt:SecuredTermLoan


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-11-302019-09-302019-06-302019-04-30
Value1259106210651068745746748498500500
Percentage of DebtInstrumentFaceAmount202.3170.7171.2171.6119.7120.00.080.180.30.0

bxmt:TermLoan


Debt
Period End2021-06-302020-12-31
Value13561062
Percentage of DebtInstrumentFaceAmount217.9170.7

bxmt:TwentyNineteenTermLoan


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value934937739741743
Percentage of DebtInstrumentFaceAmount150.1150.5118.8119.1119.4

bxmt:TwentyTwentyTermLoan


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value421322323324325
Percentage of DebtInstrumentFaceAmount67.751.851.952.152.2

us-gaap:DebtInstrumentFairValue us-gaap:FairValueByMeasurementBasis

us-gaap:DebtInstrumentFairValue

us-gaap:CarryingReportedAmountFairValueDisclosure


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value87098124788089739689933510054879082579208897468417022599652736079580657605716532061986311611665852365
Percentage of DebtInstrumentFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value872981427896900097169367100838816828392358996686270446018529060965823577657316131
Percentage of DebtInstrumentFairValue100.2100.2100.2100.3100.3100.3100.3100.3100.3100.3100.2100.3100.3100.4100.3100.3100.3100.3100.3100.3

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscount

bxmt:ConvertibleSeniorNote


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value4.1134.9225.7156.5047.2778.0478.8019.5521011111214151011115.532
Percentage of DebtInstrumentUnamortizedDiscount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

bxmt:SecuredTermLoan


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value109.80710101.61.61.31.3
Percentage of DebtInstrumentUnamortizedDiscount219.8171.6157.9147.619.918.213.612.6

bxmt:TermLoan


Debt
Period End2021-06-302020-12-31
Value109.807
Percentage of DebtInstrumentUnamortizedDiscount250.1171.6

bxmt:TwentyNineteenTermLoan


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value3.13.11.61.61.6
Percentage of DebtInstrumentUnamortizedDiscount75.463.028.024.622.0

us-gaap:DebtSecurities us-gaap:InvestmentType, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:DebtSecurities

bxmt:TwentyNineteenTermLoan, bxmt:BlackstoneAdvisedInvestmentVehiclesOrTheFunds


Debt
Period End2021-03-31
Value5.5
Percentage of DebtSecurities100.0

us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLoss

us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.1220.8891.7232.0334.1195.1220.0
Percentage of DebtSecuritiesHeldToMaturityAllowanceForCreditLoss100.0100.0100.0100.0100.0100.00.0

us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLoss us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:AccountingStandardsUpdate201613


Debt
Period End2020-12-312020-09-302020-06-302020-01-012019-12-31
Value0.4450.4450.4454450.445
Percentage of DebtSecuritiesHeldToMaturityAllowanceForCreditLoss25.821.910.80.00.0

us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLoss us-gaap:GeographicDistribution

us-gaap:GeographicDistributionDomestic


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.1220.8891.7232.0334.1195.1220.0
Percentage of DebtSecuritiesHeldToMaturityAllowanceForCreditLoss100.0100.0100.0100.0100.0100.00.0

us-gaap:DebtWeightedAverageInterestRate bxmt:TypesOfInterestRates, us-gaap:CreditFacility

us-gaap:DebtWeightedAverageInterestRate

bxmt:VariableInterestRateOnePointFiveZeroPercentToOnePointSevenFourPercent, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value1.651.53
Percentage of DebtWeightedAverageInterestRate100.0100.0

bxmt:VariableInterestRateOnePointFourNinePercentOrLess, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value1.461.37
Percentage of DebtWeightedAverageInterestRate88.589.5

bxmt:VariableInterestRateOnePointSevenFivePercentToOnePointNineNinePercent, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value1.571.67
Percentage of DebtWeightedAverageInterestRate95.2109.2

bxmt:VariableInterestRateTwoPointZeroPercentOrMore, bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value1.671.63
Percentage of DebtWeightedAverageInterestRate101.2106.5

us-gaap:DebtWeightedAverageInterestRate us-gaap:CreditFacility

bxmt:CreditFacilities


Debt
Period End2021-06-302020-12-31
Value1.641.57
Percentage of DebtWeightedAverageInterestRate99.4102.6

us-gaap:DeferredFinanceCostsGross us-gaap:LongtermDebtType

us-gaap:DeferredFinanceCostsGross

bxmt:TwentyNineteenTermLoan


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value1212101010
Percentage of DeferredFinanceCostsGross100.0100.0100.0100.0100.0

bxmt:TwentyTwentyTermLoan


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value5.33.83.83.83.8
Percentage of DeferredFinanceCostsGross43.130.937.637.637.6

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredFinanceCostsNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value191716262631292526272120222116171715151516171512
Percentage of DeferredFinanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet us-gaap:LongtermDebtType

bxmt:ConvertibleSeniorNote


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value0.2760.3360.3960.4550.5130.5710.6280.6850.740.7950.8490.9211.0021.0820.810.8730.6950.206
Percentage of DeferredFinanceCostsNet1.41.92.41.71.91.82.22.62.82.93.94.54.55.04.95.03.91.3

bxmt:SecuredTermLoan


Deferred
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value121111129.28
Percentage of DeferredFinanceCostsNet72.268.944.345.532.0

bxmt:TermLoan


Deferred
Period End2021-06-302020-12-31
Value1311
Percentage of DeferredFinanceCostsNet70.568.9

us-gaap:DerivativeAssets

us-gaap:DerivativeAssets


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value19310.5227.7620.3270.0011.07925145.3849.9162.7196.2763.1191.2141.6280.7431.4244.0860.268148.657
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:ForeignExchangeContract, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-312016-12-312015-12-31
Value16300.5216.1170.3210.0010.09619124.8628.211.5145.1511.7161.1743.2687.999
Percentage of DerivativeAssets85.597.499.878.898.2100.08.976.485.790.382.855.782.155.082.480.092.4

us-gaap:ForeignExchangeContract, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-03-312017-06-302017-03-312016-12-312015-12-31
Value2.8870.8411.6440.0060.9835.7871.8530.2941.1160.1630.1540.390.0140.4870.419
Percentage of DerivativeAssets14.52.621.21.891.123.113.25.511.36.04.952.51.011.94.8

us-gaap:InterestRateContract, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-06-302017-03-312016-12-312015-12-31
Value0.0010.0010.0960.1190.1450.2280.591.0421.1251.2491.2140.7430.2360.3310.238
Percentage of DerivativeAssets0.20.08.90.51.04.25.938.317.940.0100.0100.016.68.12.7

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

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value19310.5227.7620.3270.0011.07925145.3849.9162.7196.2763.1191.2141.6280.7431.4244.0860.268140.6258.6573.732.5911.138
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.0

us-gaap:DerivativeAssets us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value19310.5227.7620.3270.0011.07925145.3849.9162.7196.2763.1191.2141.6280.7431.4244.0860.268140.6258.6573.732.5911.138
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.0

us-gaap:DerivativeAssets us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-06-302017-03-312016-12-312015-12-31
Value16300.5226.1180.3210.0010.09619125.098.82.5566.2762.9651.2140.7431.413.5998.237
Percentage of DerivativeAssets85.597.4100.078.898.2100.08.976.986.894.588.794.0100.095.1100.0100.099.088.195.1

us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-03-312017-06-302017-03-312016-12-312015-12-31
Value2.8870.8411.6440.0060.9835.7871.8530.2941.1160.1630.1540.390.0140.4870.42
Percentage of DerivativeAssets14.52.621.21.891.123.113.25.511.36.04.952.51.011.94.9

us-gaap:DerivativeCapInterestRate us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:VariableRate

us-gaap:DerivativeCapInterestRate

currency:CAD, us-gaap:InterestRateCap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, bxmt:Cdor


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value1.01.01.02.10.030.030.030.030.030.030.0250.020.020.020.020.020.020.020.020.020.020.020.020.020.02
Percentage of DerivativeCapInterestRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilities

us-gaap:DerivativeLiabilities


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value13135825260.001423.9924.9681.7262.9253.6761.252.1664.9117.1676.9280.211.448
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilities us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:ForeignExchangeContract, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-06-302016-12-312015-12-31
Value3.74.5175523240.001410.0323.9451.721.3073.6761.1042.1664.8726.340.210.511
Percentage of DerivativeLiabilities26.933.594.692.194.4100.098.70.879.499.744.7100.088.3100.099.291.5100.035.3

us-gaap:ForeignExchangeContract, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302017-12-312017-06-302015-12-31
Value108.9493.1572.0041.4490.5353.961.0230.0061.6180.1460.0390.5880.937
Percentage of DerivativeLiabilities73.166.55.47.95.51.399.220.60.355.311.70.88.564.7

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

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value13135825260.001423.9924.9681.7262.9253.6761.252.1664.9117.1676.9280.211.1410.8459.2891.4480.3682.506
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.0

us-gaap:DerivativeLiabilities us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value13135825260.001423.9924.9681.7262.9253.6761.252.1664.9117.1676.9280.211.1410.8459.2891.4480.3682.506
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.0

us-gaap:DerivativeLiabilities us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-06-302016-12-312015-12-31
Value3.74.5175523240.001410.0323.9451.721.3073.6761.1042.1664.8726.340.210.511
Percentage of DerivativeLiabilities26.933.594.692.194.5100.098.70.879.499.744.7100.088.3100.099.291.5100.035.3

us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302017-12-312017-06-302015-12-31
Value108.9493.1572.0041.4490.5353.961.0230.0061.6180.1460.0390.5880.937
Percentage of DerivativeLiabilities73.166.55.47.95.51.399.220.60.355.311.70.88.564.7

us-gaap:DerivativeNotionalAmount us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:DerivativeNotionalAmount

currency:AUD, bxmt:ForeignExchangeContractBuyUnitedStatesDollarSellAustraliianDollar, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value8992929292135
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0100.0100.0

currency:CAD, bxmt:ForeignExchangeContractBuyUnitedStatesDollarSellCanadaDollar, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value212026262423
Percentage of DerivativeNotionalAmount23.522.428.228.226.317.1

currency:EUR, bxmt:ForeignExchangeContractBuyUnitedStatesDollarSellEuropeanDollar, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value679759754750607525
Percentage of DerivativeNotionalAmount758.8818.0813.3808.8654.8387.6

currency:GBP, bxmt:ForeignExchangeContractBuyUnitedStatesDollarSellGreatBritainPound, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value542460372365385527
Percentage of DerivativeNotionalAmount606.4496.0401.4394.4415.0388.7

currency:SEK, bxmt:ForeignExchangeContractBuyUnitedStatesDollarSellSwedishKrona, us-gaap:NetInvestmentHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-31
Value999628
Percentage of DerivativeNotionalAmount1116.8677.4

us-gaap:DerivativeNotionalAmount us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:VariableRate

currency:CAD, us-gaap:InterestRateCap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, bxmt:Cdor


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value383838382121212139
Percentage of DerivativeNotionalAmount42.841.341.341.723.00.015.80.00.0

us-gaap:DerivativeNotionalAmount us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

currency:CAD, bxmt:ForeignExchangeContractBuyCanadaDollarSellUnitedStatesDollar, us-gaap:Nondesignated


Derivative
Period End2021-03-312019-12-31
Value4.215
Percentage of DerivativeNotionalAmount4.511.7

currency:CAD, bxmt:ForeignExchangeContractBuyUnitedStatesDollarSellCanadaDollar, us-gaap:Nondesignated


Derivative
Period End2021-03-312019-12-31
Value4.215
Percentage of DerivativeNotionalAmount4.511.7

currency:EUR, bxmt:ForeignExchangeContractBuyEuropeanDollarSellUnitedStatesDollar, us-gaap:Nondesignated


Derivative
Period End2020-09-302019-09-30
Value25131
Percentage of DerivativeNotionalAmount27.90.0

currency:EUR, bxmt:ForeignExchangeContractBuyGreatBritainPoundSellEuro, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312019-12-312018-12-31
Value1538.411212
Percentage of DerivativeNotionalAmount171.59.19.50.0

currency:EUR, bxmt:ForeignExchangeContractBuyUnitedStatesDollarSellEuropeanDollar, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-09-30
Value1698.418.413468131
Percentage of DerivativeNotionalAmount189.59.19.137.074.10.0

currency:GBP, bxmt:ForeignExchangeContractBuyEuropeanDollarSellGreatBritainPound, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-30
Value146146146145
Percentage of DerivativeNotionalAmount163.4157.6157.6157.0

currency:GBP, bxmt:ForeignExchangeContractBuyGreatBritainPoundSellUnitedStatesDollar, us-gaap:Nondesignated


Derivative
Period End2020-09-302018-12-31
Value1923
Percentage of DerivativeNotionalAmount20.60.0

currency:GBP, bxmt:ForeignExchangeContractBuyUnitedStatesDollarSellGreatBritainPound, us-gaap:Nondesignated


Derivative
Period End2021-06-302020-09-302020-06-302018-12-31
Value631914523
Percentage of DerivativeNotionalAmount71.120.6156.40.0

us-gaap:DerivativeNotionalAmount us-gaap:StatementGeographical, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

country:US, bxmt:ForeignExchangeContractBuyEuropeanDollarSellUnitedStatesDollar, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-06-30
Value1698.4156
Percentage of DerivativeNotionalAmount189.59.160.5

country:US, bxmt:ForeignExchangeContractBuyGreatBritainPoundSellUnitedStatesDollar, us-gaap:Nondesignated


Derivative
Period End2021-06-30
Value63
Percentage of DerivativeNotionalAmount71.1

us-gaap:DerivativeNumberOfInstrumentsHeld us-gaap:Currency, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeNumberOfInstrumentsHeld

currency:EUR, bxmt:ForeignExchangeContractBuyUnitedStatesDollarSellEuropeanDollar, us-gaap:Nondesignated