NMRK


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

Table of contents


us-gaap:StatementClassOfStock
us-gaap:CommonStockValue
us-gaap:StatementClassOfStock
us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted
us-gaap:PlanName
us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:CostsAndExpenses

us-gaap:GeneralAndAdministrativeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaid
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:InterestExpense
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:InterestExpenseLongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:OperatingIncomeLoss

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:PreferredStockDividendsIncomeStatementImpact
us-gaap:ConsolidatedEntities

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService

us-gaap:Revenues
us-gaap:ProductOrService

us-gaap:Assets
us-gaap:ConsolidatedEntities

us-gaap:Liabilities
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:AssetsCurrent
us-gaap:ConsolidatedEntities

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ConsolidatedEntities

us-gaap:MarketableSecuritiesCurrent

us-gaap:OtherAssetsCurrent
us-gaap:ConsolidatedEntities

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:Goodwill
us-gaap:BusinessAcquisition
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

us-gaap:LiabilitiesCurrent
us-gaap:ConsolidatedEntities

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:TaxesPayableCurrent
us-gaap:ConsolidatedEntities

us-gaap:LongTermDebtNoncurrent
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:MinorityInterest

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock
us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:MinorityInterest

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:AmortizationOfFinancingCosts
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:ConsolidatedEntities, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:DeferredTaxAssetsNet
us-gaap:PlanName

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

nmrk:AllocationOfIncomeLossToLimitedPartnershipInterestDiluted

nmrk:AllocationsOfNetIncomeAndGrantOfExchangeabilityToLimitedPartnershipUnitsAndFPUsAndIssuanceOfCommonStock
us-gaap:StatementClassOfStock
nmrk:AveragePriceOfUnitsRedeemed
us-gaap:BusinessAcquisition
nmrk:BusinessCombinationConsiderationTransferredDebtorInPossessionFinancing
us-gaap:BusinessAcquisition
nmrk:BusinessCombinationConsiderationTransferredFirstAndSecondLienDebt
us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty
nmrk:CapitalAccountThreshold

nmrk:CommonStockExchangeabilityGrantedIssuedExpense
us-gaap:ConsolidatedEntities, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnerTypeOfPartnersCapitalAccount

nmrk:CompensationAndEmployeeBenefitsNet
us-gaap:RelatedPartyTransaction
us-gaap:CounterpartyName, us-gaap:ManagingRisksInherentInServicingAssetsAndServicingLiabilitiesByTypeOfRisk
nmrk:ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposureWithoutCreditProtection

nmrk:ContractuallySpecifiedServicingFeesAncillaryFeesEscrowInterestAndPlacementFeesEarnedInExchangeForServicingFinancialAssets
us-gaap:PreferredUnitsByName, us-gaap:RelatedPartyTransactionsByRelatedParty
nmrk:DeterminationPrice

nmrk:EarningsPerSharePotentiallyDilutiveSecuritiesShares

nmrk:EquityBasedCompensationAndAllocationOfNetIncomeToLimitedPartnershipUnitsAndFPUs
us-gaap:ConsolidatedEntities

nmrk:EquitybasedcompensationandallocationofnetincometolimitedpartnershipunitsandFPUs
us-gaap:ConsolidatedEntities

nmrk:EscrowInterestAndPlacementFeesAmount

nmrk:FairValueOfExpectedNetFutureCashFlowsFromServicingRecognizedAtCommitmentNet

nmrk:GainOnOriginatedMortgageServicingRights

nmrk:GainsLossesRecognizedForChangeInFairValueOnLoansHeldForSale

nmrk:IncreaseDecreaseInRightOfUseLiability

nmrk:IncrementalCommonSharesAttributableToCantorUnits

nmrk:IncrementalCommonSharesAttributableToExchange

nmrk:IncrementalCommonSharesAttributableToLimitedPartnershipInterests

nmrk:IncrementalCommonSharesAttributableToOtherInstruments

nmrk:IncrementalCommonSharesAttributabletoExchange

nmrk:IssuanceAndRedemptionOfLimitedPartnershipUnitsIncludingContingentUnits
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:ConsolidatedEntities, us-gaap:RelatedPartyTransactionsByRelatedParty
nmrk:IssuanceOfAdditionalLimitedPartnersUnitsInExchangeForCashPayment
us-gaap:ConsolidatedEntities, us-gaap:RelatedPartyTransactionsByRelatedParty
nmrk:IssuanceOfLimitedPartnersUnitsExchanges

nmrk:MinorityInterestDecreaseFromRedemptionsOfExchangeablePartnershipUnits
us-gaap:StatementEquityComponents

nmrk:NetIncomeLossAfterAdjustmentsForNoncashAndNonoperatingItems

nmrk:NoncashChangesInAcquisitionEarnouts

nmrk:NoncontrollingInterestIncreaseDecreaseFromGrantOfExchangeabilityRedemptionAndIssuanceOfLimitedPartnershipInterests
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty
nmrk:NumberOfNonExchangeablePSURedeemed

nmrk:OtherComprehensiveIncomeLossNetofTaxExcludingOther
us-gaap:StatementEquityComponents
dei:LegalEntity, us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty
nmrk:PaymentToRedeemExchangeableSharesNet
dei:LegalEntity, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock
us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock
dei:LegalEntity, us-gaap:RelatedPartyTransactionsByRelatedParty
nmrk:PaymentToRedeemNonExchangeableSharesNet
us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty
dei:LegalEntity, us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty
nmrk:PaymentToRedeemSharesNet
us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
us-gaap:PreferredUnitsByName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
us-gaap:Range, us-gaap:DebtInstrument
nmrk:PercentageOfContingentLiabilityOfActualLossesIncurredOnOutstandingLoans
us-gaap:FinancingReceivablesPeriodPastDue
nmrk:PotentialLossOnLiquidationOfLoan
us-gaap:ConsolidatedEntities, us-gaap:RelatedPartyTransactionsByRelatedParty
nmrk:ProceedsFromIssuanceOfAdditionalLimitedPartnersUnitsWithCapitalAccount

nmrk:ProceedsFromRepaymentsOfSecuritiesLoaned
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType, us-gaap:SubsidiarySaleOfStock
nmrk:ProceedsReceivedToRepurchaseShares

nmrk:ProvisionForRiskSharingObligations

nmrk:ProvisiononCreditLossesSharingGuarantee

nmrk:RealizedGainLossOnNonMarketableInvestments

nmrk:RelatedPartyAccountsReceivableAllowanceForCreditLossPeriodIncreaseDecrease

nmrk:RepaymentOfSecurityDeposit

nmrk:RightOfUseAssetIncreaseDecrease
us-gaap:FairValueByAssetClass
nmrk:ServicingAssetAtAmortizedValuePurchasesFromAffiliate
us-gaap:ConsolidatedEntities
nmrk:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingGrantDateFairValue
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:ConsolidatedEntities, us-gaap:AwardType
nmrk:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsForfeitedFairValue
us-gaap:ConsolidatedEntities, us-gaap:AwardType
nmrk:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedFairValue
us-gaap:ConsolidatedEntities, us-gaap:AwardType
nmrk:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSettledFairValue
dei:LegalEntity, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock
nmrk:SharesRedeemedOrExchanged

nmrk:TemporaryEquityDistributionOfIncome

nmrk:TemporaryEquityRedemptions
us-gaap:StatementClassOfStock
nmrk:TreasuryStockAcquiredAndRedeemedAverageCostPerShare

nmrk:UnrealizedGainsLossOnLoansHeldForSale
us-gaap:RelatedPartyTransactionsByRelatedParty
nmrk:ValueOfLPUIssuedInExchange

us-gaap:AdjustmentForAmortization

us-gaap:AncillaryFeeIncomeGeneratedByServicingFinancialAssetsAmount
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionsProFormaRevenue
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationConsiderationTransferred1
us-gaap:AwardType, us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred

us-gaap:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual

us-gaap:CapitalizedComputerSoftwareAdditions
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:CapitalizedComputerSoftwareAmortization1
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:ConsolidatedEntities, us-gaap:SubsequentEventType
us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:SubsequentEventType
us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType, us-gaap:InvestmentType
us-gaap:ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure
us-gaap:CounterpartyName, us-gaap:ManagingRisksInherentInServicingAssetsAndServicingLiabilitiesByTypeOfRisk
us-gaap:StatementGeographical, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType, us-gaap:InvestmentType
us-gaap:ConcentrationRiskPercentage1

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractuallySpecifiedServicingFeesAmount

us-gaap:CostDirectLabor
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:VariableRate
us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:DebtRelatedCommitmentFeesAndDebtIssuanceCosts
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:BusinessAcquisition
us-gaap:DebtorReorganizationItemsDebtorInPossessionFacilityFinancingCosts
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

us-gaap:DeferredCompensationArrangementWithIndividualCompensationExpense

us-gaap:Depreciation

us-gaap:DepreciationAndAmortization
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation
us-gaap:HedgingDesignation
us-gaap:ConsolidatedEntities, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:DistributionMadeToLimitedPartnerCashDistributionsDeclared

us-gaap:DividendsCommonStockStock
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:DividendsPreferredStock
us-gaap:ConsolidatedEntities, us-gaap:AwardType
us-gaap:EmployeeBenefitsAndShareBasedCompensation
us-gaap:ConsolidatedEntities, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:BusinessAcquisition
us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss
us-gaap:BusinessAcquisition

us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
us-gaap:FinancialInstrument

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues
us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
us-gaap:FinancialInstrument

us-gaap:FeesAndCommissionsMortgageBankingAndServicing
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:GainLossOnSaleOfMortgageLoans

us-gaap:GoodwillAcquiredDuringPeriod

us-gaap:GoodwillPurchaseAccountingAdjustments
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:ImpairmentOfLongLivedAssetsHeldForUse

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncreaseDecreaseInAccountsPayableRelatedParties

us-gaap:IncreaseDecreaseInAccruedSalaries

us-gaap:IncreaseDecreaseInDueFromEmployeeCurrent

us-gaap:IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:InterestAndFeeIncomeLoansHeldForSaleMortgages

us-gaap:LaborAndRelatedExpense
us-gaap:RelatedPartyTransaction

us-gaap:LeaseCost
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:LineOfCreditFacilityIncreaseDecreaseForPeriodNet
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:CreditFacility, us-gaap:SubsequentEventType
us-gaap:StatementScenario, us-gaap:CreditFacility
us-gaap:Range, us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityInterestRateDuringPeriod

us-gaap:MarketableSecuritiesRealizedGainLoss
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:SubsidiarySaleOfStock
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancialInstrument

us-gaap:MarketableSecuritiesUnrealizedGainLoss
us-gaap:FinancialInstrument
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancialInstrument

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments
dei:LegalEntity, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest

us-gaap:OtherComprehensiveIncomeOtherNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:PaymentsForOriginationOfMortgageLoansHeldForSale

us-gaap:PaymentsOfCapitalDistribution

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsOfMergerRelatedCostsFinancingActivities
us-gaap:BusinessAcquisition
us-gaap:PaymentsToAcquireBusinessesGross

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireMortgageServicingRightsMSR
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:PaymentsToMinorityShareholders

us-gaap:ProceedsFromIssuanceOfOtherLongTermDebt

us-gaap:ProceedsFromLinesOfCredit
us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:ProceedsFromPartnershipContribution
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities
us-gaap:FinancialInstrument
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancialInstrument

us-gaap:ProceedsFromSaleOfMortgageLoansHeldForSale

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RepaymentsOfLinesOfCredit
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:RepaymentsOfOtherLongTermDebt
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RepaymentsOfRelatedPartyDebt
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RevenueFromRelatedParties
nmrk:OtherRevenueSources
us-gaap:RevenueNotFromContractWithCustomer

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:FairValueByAssetClass
us-gaap:ServicingAssetAtAmortizedValueAdditions
us-gaap:FairValueByAssetClass
us-gaap:ServicingAssetAtAmortizedValueAmortization1
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ServicingAssetAtFairValueAdditions
us-gaap:VariableRate
us-gaap:ServicingAssetAtFairValuePeriodIncreaseDecrease
us-gaap:Range
us-gaap:ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate
us-gaap:ConsolidatedEntities, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:ConsolidatedEntities, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:ConsolidatedEntities, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:CapitalUnitsByClass
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares

us-gaap:ShortTermLeaseCost
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:SubleaseIncome

us-gaap:TemporaryEquityNetIncome

us-gaap:TemporaryEquityStockIssuedDuringPeriodValueNewIssues
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:TreasuryStockAcquiredAverageCostPerShare
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType
us-gaap:StatementClassOfStock

us-gaap:TreasuryStockValueAcquiredParValueMethod
us-gaap:StatementEquityComponents

us-gaap:UnrealizedGainLossOnDerivatives
us-gaap:FairValueByAssetClass
us-gaap:ValuationAllowanceForImpairmentOfRecognizedServicingAssetsPeriodIncreaseDecrease
us-gaap:StatementClassOfStock
dei:EntityCommonStockSharesOutstanding

nmrk:AccountsPayableAndAccruedExpensesCurrent

nmrk:AccruedCompensationNoncurrent

nmrk:AccruedPayrollTaxesNoncurrent

nmrk:AnnualizedNetProfitAllocation
us-gaap:FairValueByFairValueHierarchyLevel
nmrk:BusinessCombinationContingentConsiderationLiabilityAtCost
us-gaap:BusinessAcquisition
nmrk:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets
us-gaap:BusinessAcquisition
nmrk:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAsset
us-gaap:BusinessAcquisition
nmrk:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseLiablities

nmrk:ContingentConsiderationFairValue
us-gaap:FairValueByFairValueHierarchyLevel

nmrk:DeferredTaxAssetsNetOperatingLossAndCreditCarryforwards

nmrk:DeferredTaxAssetsOtherDeferredAndAccruedExpenses
dei:LegalEntity, us-gaap:StatementClassOfStock
nmrk:ExchangeablePartnershipUnits

nmrk:FinancialGuaranteeLiability.CreditRiskServiceLoans
us-gaap:FinancingReceivablesPeriodPastDue

nmrk:FinancialGuaranteeLiabilityMaximumPotentialLoss
us-gaap:FinancingReceivablesPeriodPastDue

nmrk:FinancialGuaranteeLiabilityMaximumPotentialLossCoveredByCreditEnhancementAgreement

nmrk:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour

nmrk:FiniteLivedIntangibleAssetsExpectedAmortizationExpense

nmrk:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour
us-gaap:FinancingReceivablesPeriodPastDue
nmrk:LiquidationValueOfLoansOutstanding

nmrk:NonMarketableInvestments
us-gaap:PartnerTypeOfPartnersCapitalAccount
nmrk:NotionalValueOfLimitedPartnershipUnitsEligibleForConversion
us-gaap:ConsolidatedEntities
nmrk:NotionalValueOfLimitedPartnershipUnitsWithPostTerminationPayOutAmount

nmrk:OutsideBrokerPayableCurrent
us-gaap:BalanceSheetLocation
nmrk:OutstandingBorrowerAdvancesToInvestors
us-gaap:RelatedPartyTransactionsByRelatedParty
nmrk:PreferredStockConvertibleConversionRatio
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock

nmrk:PrimaryServicingPortfolio

nmrk:QuarterlyNetProfitAllocation

nmrk:RedeemablePreferredUnitsCurrent
us-gaap:RelatedPartyTransactionsByRelatedParty
nmrk:SecuritiesLoanedFairValue
us-gaap:PlanName
nmrk:SettlementSharePrice
us-gaap:PlanName, us-gaap:SubsequentEventType
us-gaap:ConsolidatedEntities, us-gaap:AwardType
nmrk:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedFairValue
us-gaap:StatementClassOfStock
nmrk:ShareRepurchaseAndRedemptionUnitRemainingAuthorizedAmount
us-gaap:ConsolidatedEntities, us-gaap:AwardType
nmrk:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsNonvestedFairValue

nmrk:SpecialServicingPortfolio

us-gaap:AccountsAndOtherReceivablesNetCurrent

us-gaap:AccountsPayableAndOtherAccruedLiabilitiesCurrent
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:AccountsPayableCurrentAndNoncurrent
us-gaap:ConsolidatedEntities
us-gaap:AccountsPayableRelatedPartiesCurrent

us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

us-gaap:AccountsReceivableRelatedParties

us-gaap:AccruedPayrollTaxesCurrent
us-gaap:BalanceSheetLocation
us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
us-gaap:BalanceSheetLocation
us-gaap:AlternativeInvestment
us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:BusinessCombinationContingentConsiderationLiability
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType
us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:MeasurementInputType
us-gaap:Range, us-gaap:MeasurementInputType

us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

us-gaap:ContractWithCustomerLiability

us-gaap:ContractualObligation
us-gaap:DebtInstrument
us-gaap:FinancialInstrument
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:ContractualObligationDueAfterFifthYear
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:ContractualObligationDueInFourthAndFifthYear
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:ContractualObligationDueInNextTwelveMonths
us-gaap:DebtInstrument
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:ContractualObligationDueInSecondAndThirdYear
us-gaap:DebtInstrument
us-gaap:FinancialInstrument
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased
us-gaap:ConsolidatedEntities, us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentCarryingAmount
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtSecurities
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent
us-gaap:ConsolidatedEntities, us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:DeferredFinanceCostsNet
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredRentCreditNoncurrent

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsInvestments

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DepositAssets
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType
us-gaap:DerivativeAssetMeasurementInput
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:DerivativeAssets
us-gaap:FinancialInstrument

us-gaap:DerivativeAssetsCurrent
us-gaap:ConsolidatedEntities

us-gaap:DerivativeAssetsNoncurrent

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
us-gaap:DerivativeInstrumentRisk
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

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

us-gaap:DerivativeLiabilitiesCurrent

us-gaap:DueFromEmployeesNoncurrent
us-gaap:RelatedPartyTransaction

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

us-gaap:EquityMethodInvestments
us-gaap:BalanceSheetLocation
us-gaap:FinancialInstrument
us-gaap:EquitySecuritiesFvNiCost
us-gaap:FinancialInstrument, us-gaap:SubsequentEventType, us-gaap:SubsidiarySaleOfStock
us-gaap:FinancialInstrument, us-gaap:SubsidiarySaleOfStock
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancialInstrument

us-gaap:EscrowDeposit
us-gaap:TypeOfArrangement
us-gaap:ExcessCapital

us-gaap:FairValueConcentrationOfRiskLoansReceivable
us-gaap:CounterpartyName, us-gaap:ManagingRisksInherentInServicingAssetsAndServicingLiabilitiesByTypeOfRisk

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
us-gaap:FinancialInstrument

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:ManagingRisksInherentInServicingAssetsAndServicingLiabilitiesByTypeOfRisk
us-gaap:GuaranteeObligationsMaximumExposure

us-gaap:GuarantyLiabilities

us-gaap:IntangibleAssetsGrossExcludingGoodwill
us-gaap:ConsolidatedEntities
us-gaap:InterestPayableCurrent

us-gaap:InvestmentsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LiabilitiesFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:TitleOfIndividual
us-gaap:LimitedPartnersCapitalAccountUnitsOutstanding
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:LongtermDebtType

us-gaap:LoansHeldForSaleFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByMeasurementBasis
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased
us-gaap:CounterpartyName, us-gaap:ManagingRisksInherentInServicingAssetsAndServicingLiabilitiesByTypeOfRisk
us-gaap:LossContingencyAccrualAtCarryingValue

us-gaap:MortgagesHeldForSaleFairValueDisclosure
us-gaap:ConsolidatedEntities
us-gaap:NotesReceivableRelatedParties

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards

us-gaap:OtherAssetsMiscellaneousCurrent

us-gaap:OtherAssetsMiscellaneousNoncurrent
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:PreferredStockConvertibleConversionRatio
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock

us-gaap:PrepaidExpenseCurrent
us-gaap:ConsolidatedEntities

us-gaap:PrepaidTaxes

us-gaap:RestrictedCashCurrent

us-gaap:SecuritiesLoaned
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:FairValueByAssetClass
us-gaap:ServicingAsset
us-gaap:FairValueByAssetClass
us-gaap:ServicingAssetAtAmortizedValue
us-gaap:FairValueByAssetClass
us-gaap:ServicingAssetAtFairValueAmount
us-gaap:ConsolidatedEntities, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
dei:LegalEntity, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock
us-gaap:SharePrice
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:SharesIssuedPricePerShare
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock

us-gaap:StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
us-gaap:ConsolidatedEntities, us-gaap:SubsequentEventType
us-gaap:SubsequentEventType
us-gaap:SubsequentEventType
us-gaap:StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1

us-gaap:TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests
us-gaap:StatementClassOfStock
us-gaap:TreasuryStockCommonShares
us-gaap:StatementClassOfStock
us-gaap:TreasuryStockCommonValue
us-gaap:FairValueByAssetClass
us-gaap:ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance

us-gaap:WarehouseAgreementBorrowings
us-gaap:DebtInstrument

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
General And Administrative Expense
Balance Sheet
Intangible Assets Net Excluding Goodwill
Assets
Property Plant And Equipment Net
Current Assets
Other Assets Current
NonCurrent Assets
Intangible Assets Net Excluding Goodwill
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Current Liabilities
Operating Lease Liability Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Accounts Receivable
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock nmrk:ContingentClassACommonStock▃▃▃▁▁▁▂█▇██1.5721.5721.5721.161.051.051.4613.252.9563.1413.25NANANANANANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA█▇▆▅▅▅▅▅▅▄▄▁▁▁▁1.7721.6951.6761.6321.6231.6121.6081.591.5831.5741.571.3891.3891.3891.386NANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassB███████████▁▁▁▁0.2120.2120.2120.2120.2120.2120.2120.2120.2120.2120.2120.1580.1580.1580.158NANANA
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonClassB███████████▁▁▁▁21.321.321.321.321.28553321.28553321.28553321.28553321.28553321.28521.28515.8415.8415.8415.84NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁273.555271.194NA266.793178.523263.646NA206.616208.15269.057NA185.134155.938246.834NANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁185.114183.254NA179.501178.523177.545NA177.02178.754178.611NA155.152155.157155.694NANANANA
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount NANANA9.297.50.6NA61.862.80.0NA77.4102.80.0NANANANA
us-gaap:EarningsPerShareBasic █▂▁▂▁▁▁▃▂▁▁▂▁▂2.350.17-0.029999999999999970.4-0.010.03-0.080000000000000070.480.110.080.089999999999999970.430.00.13NANANANA
us-gaap:EarningsPerShareDiluted █▂▁▂▁▁▁▃▂▂▂▃▁▂2.130.16-0.029999999999999970.39-0.010.03-0.080000000000000070.480.110.080.079999999999999960.430.00.12NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 TTM Greenblatt ROC _ _█▂▁▂▁▁▁▃▂▁▂▃▁▂▁736.09663.972.819142.32910.78828.065-8.318167.49649.26637.79291.126162.93725.69852.8299.997NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:PlanName nmrk:A2021EquityEventNANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax █▂▂▃▂▂▃▃▂▂▂▃▂▂▁▃▂▂440.16432.48-2.2274.214-1.0136.905117.30588.69822.66816.90417.75968.2370.73919.997-46.17198.80755.14536.711
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest █▂▁▃▁▂▃▃▂▂▂▃▂▂▁▃▂▂585.61143.953-3.56698.39-0.68312.961161.712122.56932.06423.40639.559115.5584.29432.487-45.53898.4755.15737.007
us-gaap:CostsAndExpenses █▂▃▂▁▂▄▃▃▂▄▂▂▂980.587437.8540.24402.203336.541457.303626.369527.849498.486400.146568.799449.589440.556383.338NANANANA
us-gaap:GeneralAndAdministrativeExpense █▆▄▂▂▅▄▄▅▄▅▄▄▃▂▁▂▁135.008107.17579.32261.7961.01292.28185.91886.297101.74987.89391.36984.91480.04875.42760.06452.31359.40447.382
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest █▂▁▂▁▁▁▃▂▁▂▃▁▂▁▂▂▂727.37355.157-6.292132.7970.73219.035-16.459159.32941.18530.09376.421151.42815.11639.428.544100.45956.57936.992
us-gaap:IncomeTaxExpenseBenefit █▂▁▃▁▁▁▃▂▁▃▃▂▁▄▁▁▁142.18210.579-1.16533.2720.0884.797-0.13236.769.1216.68736.86235.8710.8226.93354.0821.9891.422-0.015
us-gaap:IncomeTaxesPaid ▄▁▂▂▁█▂▂▃█▁▁▁▁▁▁▁▁23.3390.10510.82811.3351.58156.54412.158.98914.67159.2790.2620.8690.0150.0190.0130.0090.0060.018
 us-gaap:InterestExpense us-gaap:CreditFacility,us-gaap:LongtermDebtType us-gaap:RevolvingCreditFacility,us-gaap:LineOfCredit▃▃▅▆█▅▂▂▂▁1.091.071.542.1432.6461.6550.8850.8460.8930.433NANANANANANANANA
 us-gaap:InterestExpense us-gaap:DebtInstrument,us-gaap:LongtermDebtType nmrk:SixPointOneTwoFivePercentSeniorNotes,us-gaap:SeniorNotes██▁███▄██▇9.3299.3218.299.2989.2939.2858.89.2689.2599.249NANANANANANANANA
 us-gaap:InterestExpenseLongTermDebt us-gaap:CreditFacility,us-gaap:LongtermDebtType us-gaap:RevolvingCreditFacility,us-gaap:LineOfCredit▃▂▄▆█▅▅▂▃▁0.6090.5821.1141.8052.3391.361.2330.5520.6030.112NANANANANANANANA
 us-gaap:InterestExpenseLongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType nmrk:SixPointOneTwoFivePercentSeniorNotes,us-gaap:SeniorNotes██▁███████8.7158.7117.5958.7028.6978.6938.6598.6848.688.676NANANANANANANANA
us-gaap:InterestIncomeExpenseNet ▄▄▃▃▃▃▄▄▄▄▁▂▃▂▇███-8.723-8.813-9.111-9.532-10.056-9.03-8.141-8.167-8.081-7.699-14.705-11.509-10.582-13.409-1.4531.7241.3811.134
us-gaap:InterestPaidNet ▅▁▆▁▆▁▅▁▆▁█▆▆▄▂▂17.7780.89218.2051.96919.3441.12217.630.71818.3230.28827.93820.53420.44412.9223.1555.585NANA
us-gaap:NetIncomeLoss █▂▂▃▂▂▂▃▂▂▂▃▂▂▁▃▂▂439.74433.105-3.78175.3490.3148.182-10.96588.69822.66816.90417.75968.2370.73919.997-46.17198.80755.14536.711
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest █▂▁▂▁▂▁▃▂▂▂▃▁▂▁▁▁▁145.44711.473-1.34624.1760.336.056-5.36233.8719.3966.50221.847.3213.55512.490.633-0.3370.0120.296
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic █▂▂▃▂▂▁▃▂▂▂▃▂▂▁▃▂▂435.17831.464-5.42272.101-2.1315.737-14.19385.47519.44413.6814.53466.5630.54619.997-46.17198.80755.14536.711
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted █▂▁▃▁▂▁▃▂▂▁▂▁▂583.74543.925-40.141103.623-2.1318.933-14.21999.523.30821.9680.99180.0380.54630.286NANANANA
us-gaap:OperatingIncomeLoss █▂▁▂▁▁▁▃▂▁▂▃▁▂▁▂▂▁736.09663.972.819142.32910.78828.065-8.318167.49649.26637.79291.126162.93725.69852.8299.99798.73555.19835.858
us-gaap:OtherNonoperatingIncomeExpense █▁▁▂▁▁▁▂▁1086.812-2.21-58.367108.608-36.3891.438-14.313108.711-3.726NANANANANANANANANA
us-gaap:PreferredStockDividendsIncomeStatementImpact NANANA3.22.42.43.23.23.23.23.21.70.2NANANANANA
 us-gaap:PreferredStockDividendsIncomeStatementImpact us-gaap:ConsolidatedEntities srt:ParentCompany█▁4.61.6NANA2.42.4NANANANANANANANANANANANA
us-gaap:ProfitLoss █▂▁▃▂▂▃▃▂▂▂▃▂▂▁▃▂▂585.19144.578-5.12799.5250.64414.238161.712122.56932.06423.40639.559115.5584.29432.487-45.53898.4755.15737.007
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▄▃▃▁▁▂█▂▂▂▄▃▂▂▃▂▃▂548.516415.403457.992305.342278.135393.933863.095357.908346.131373.357534.749421.308387.061357.668460.576398.221405.071332.582
us-gaap:Revenues █▅▇▃▂▅█▇▆▄█▅▄▃▄▃▃▁629.871503.98601.426435.924383.718483.93632.364586.634551.478447.656631.691518.809466.619430.46460.576398.221405.071332.582
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:Assets █▆▆█▆▆▄▅▅▄▄▅▃▃▁4634.0954000.7333982.454678.6124132.2383886.2373201.5993583.683506.8583453.1983454.1573721.0942837.1393057.152273.007NANANA
us-gaap:Liabilities ▅▅▅█▆▅▂▃▃▃▂▄▁▃▁3042.4683009.8693041.2583765.8873226.1832943.9252239.4572575.8722464.142405.8162371.1882708.6632058.862503.4682029.593NANANA
us-gaap:LiabilitiesAndStockholdersEquity █▆▆█▆▆▄▅▅▄▄▅▃▃▁4634.0954000.7333982.454678.6124132.2383886.2373201.5993583.683506.8583453.1983454.1573721.0942837.1393057.152273.007NANANA
us-gaap:StockholdersEquity █▄▄▄▃▃▃▄▃▃▃▂▁▁▁1225.221689.246655.049648.756572.713573.573599.664610.375559.925564.084567.569334.624286.747294.117260.41NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AssetsCurrent ▇▄▅█▆▅▂▄▄▄▅▆▃▄▁2239.7671503.8591819.0722465.7381939.8811661.7031073.531554.9091565.381552.0671757.0542057.4631298.7611595.921825.097NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▄▄▅▇██▄▃▃▂▃▂▁▁▃165.721142.854191.448272.957306.395291.544163.564116.309107.67172.527122.47570.60760.27448.069121.027NANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▄▃▅▇██▄▂▂▁▃237.647211.149258.399336.662367.138351.589221.872174.316165.332137.833187.406NANA292.013173.374NANA137.946
us-gaap:MarketableSecuritiesCurrent █▁▁▂▁▁▁▂▁▁▁▂▁▁▁1093.8874.00133.283121.7590.00.036.795123.41733.65943.74548.94293.7159.1278.62257.623NANANA
us-gaap:OtherAssetsCurrent ▅▄▄▅▅█▅▄▅▃▃▃▃▂▁84.97573.45163.7988.80379.01131.65191.19474.14779.39451.52757.73953.8648.73836.49920.994NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:PropertyPlantAndEquipmentGross ██▆▆▆▆▅▅▄▃▃▂▂▁▁209.979206.796183.524184.953181.255178.307164.248164.957150.218144.291137.229126.873119.732113.398110.586NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment █▇▇▆▆▅▄▄▄▃▃▂▂▁▁96.63191.34487.15782.93778.65475.24666.23271.11366.67562.44658.42454.71552.04648.83345.764NANANA
us-gaap:AmortizationOfIntangibleAssets ▃▂▂▂▂▂▂▃▁▁▂▁▁▂▁█▂▁2.41.71.61.71.71.61.52.81.31.31.61.21.31.50.97.41.51.3
us-gaap:PropertyPlantAndEquipmentNet ██▅▆▆▆▆▅▄▃▃▂▁▁▁113.348115.45296.367102.016102.601103.06198.01693.84483.54381.84578.80572.15867.68664.56564.822NANANA
 us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities srt:ParentCompanyNANA501.373NANANA543.412NANANA501.0NANANA101.834NANANA
us-gaap:Goodwill ██▆▆▆▆▆▅▅▃▃▃▁▁▁597.462593.294560.332559.935559.903559.214557.914539.803543.125515.326515.321513.527481.714474.99477.532NANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass us-gaap:TrademarksAndTradeNames███████████▁▁▁▁11.3511.3511.3511.3511.3511.3511.3511.3511.3511.3511.354.44.44.44.4NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▇█▅▅▅▆▅▂▃▃▃▂▁▁▁57.19561.50844.28946.55448.30250.0845.22632.4235.24834.48535.76929.35426.67725.89624.921NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass nmrk:BelowMarketLeasesNANA0.1420.7390.7610.7830.805NANANA0.896NANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerContracts▇█▂▂▂▂▂▁▂▁▁▁▁▁▁11.66113.3361.4681.571.6721.7731.8751.3971.510.5410.6030.6650.7270.7880.85NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerRelatedIntangibleAssets▆▆▇▇██▆▁▁▁▂▂▂▂▁18.59219.49720.40221.30622.24723.45418.1535.9236.6346.937.4338.6257.9768.046.455NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:LicensingAgreements▁▁▂▂▃▃▄▅▅▅▆▆▇▇█0.2290.4710.7150.9591.2021.4461.6932.0232.1892.4412.6892.9363.1843.4333.683NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:NoncompeteAgreements▁▂▃▃▄▄▅▄▅▅▆█▄▁▁3.1473.3923.6373.8874.1464.2334.5194.2814.3184.5584.7985.6074.2452.9663.11NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:OtherIntangibleAssets▆█▁3.0693.9850.142NANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:TrademarksAndTradeNames▇█▂▂▃▃▂▂▆▄▅▃▁▁▂3.7574.0871.1851.3531.5341.6511.4411.2293.0122.4022.611.7310.7550.8781.031NANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet NANA187.526NANANA182.781154.871154.88154.881149.938166.888166.885166.804168.594NANANA
us-gaap:OperatingLeaseRightOfUseAsset ██▁▁▁▁▂▂▁▁409.532422.711190.469191.705191.177195.51201.661202.0192.5182.18NANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▁▃▃▄▄▄▄█▇▇▄▄▃▂▂239.195331.991322.922379.685383.336413.102407.898599.905558.379549.53369.867368.195322.223287.508278.46NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent us-gaap:ConsolidatedEntities srt:ParentCompanyNANA30.718NANANA74.564NANANA84.436NANANA16.313NANANA
us-gaap:LiabilitiesCurrent ▅▄▅█▅▄▂▅▅▅▅▇▃▅▁1695.2111468.5341705.2922251.1631655.8161375.7031045.3871604.5141522.0261523.7591664.6392101.081230.1311527.778782.588NANANA
us-gaap:OperatingLeaseLiabilityCurrent ▇█▃▂▃▂▂▂▁45.250.929.528.629.428.327.225.422.8NANANANANANANANANA
us-gaap:TaxesPayableCurrent ▇▃▂▄▁▁▇▅▂▃█▅69.79531.9925.66638.96416.7218.21769.23753.43322.32830.19677.85848.628NANA0.111NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:LongTermDebtNoncurrent ▆▆▆▇██▅▅▅▄▄▁▂▃▆682.16681.27680.385879.504953.628952.756589.294598.565582.84538.626537.926133.95247.15400.0670.71NANANA
us-gaap:MinorityInterest ▅▄▄▄▅▅▅▅▆▆▆█▆▄▁345.999281.427266.098241.361312.099347.36340.961368.538456.078456.714489.23653.676470.648237.46-38.092NANANA
us-gaap:OtherLiabilitiesNoncurrent ▃███▇▇▆▆▆▆▁▁▁▁▁246.685433.747436.952418.227401.274394.201376.834372.793359.274343.431168.623173.633169.079163.19163.795NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ██▁▁▁▁▁▁▁418.412426.318218.629216.993215.465221.265227.942228.6220.9NANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ▆█▁▁▁▁▁76.67789.63342.07241.05943.4242.88142.612NANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ▆█▁▁▁▁▁71.08280.42340.50739.67640.14439.84739.812NANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ▇█▁▁▁▁▁66.5970.68937.86637.06838.55938.25438.21NANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA36.52NA35.97335.66435.602NANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA126.668155.102146.778146.572146.463NANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:StockholdersEquity █▄▄▄▃▃▃▄▃▃▃▂▁▁▁1225.221689.246655.049648.756572.713573.573599.664610.375559.925564.084567.569334.624286.747294.117260.41NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest █▅▅▄▄▅▅▅▅▅▅▅▄▃▁1571.22970.673921.147890.117884.812920.933940.625978.9131016.0031020.7981056.799988.3757.395531.577222.318NANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock nmrk:ContingentClassACommonStock▃▃▃▁▁▁▂█▇██1.5721.5721.5721.161.051.051.4613.252.9563.1413.25NANANANANANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA█▇▆▅▅▅▅▅▅▄▄▁▁▁▁1.7721.6951.6761.6321.6231.6121.6081.591.5831.5741.571.3891.3891.3891.386NANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassB███████████▁▁▁▁0.2120.2120.2120.2120.2120.2120.2120.2120.2120.2120.2120.1580.1580.1580.158NANANA
us-gaap:AdditionalPaidInCapitalCommonStock █▆▆▅▅▅▅▅▅▅▅▁▁▁▁506.077364.213351.45335.955329.196324.817318.165294.901292.441284.054285.07155.72860.29454.47459.374NANANA
us-gaap:RetainedEarningsAccumulatedDeficit █▃▃▃▂▂▂▃▂▂▂▂▁▁▁805.72372.387342.764348.43278.13282.053313.112344.891277.115275.589277.952277.349224.906238.096199.492NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▄▃▄▁▃▆█-2.192-2.612-2.094-3.739-2.604-1.2770.0NANANANANANANANANANANA
us-gaap:MinorityInterest ▅▄▄▄▅▅▅▅▆▆▆█▆▄▁345.999281.427266.098241.361312.099347.36340.961368.538456.078456.714489.23653.676470.648237.46-38.092NANANA
us-gaap:StockIssuedDuringPeriodValueNewIssues ▁█0.04.025NANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:RelatedPartyTransactionsByRelatedParty srt:BoardOfDirectorsChairmanNANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest▁█0.04.025NANANANANANANANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue █▃▃▅▃▁4.4472.9963.0013.3662.7242.199NA-1.4661.1950.271NANANANANANANANA
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders ▃▄▁▄█▄▄▇▅▇▆▇▅-7.2384.013-22.2446.5337.130.9526.02426.10114.24127.2818.83429.24912.604NANANANANA
 us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest▃▄▁▄█▄▄▇▅▇▆▇▅-7.2384.013-22.2446.5337.130.9526.02426.10114.24127.2818.83429.24912.604NANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▆█▂▃▁█▆▆▅▆▂▇▁▇▆494.182290.96563.356-385.955-302.694-652.401593.345174.805179.17739.433303.993-515.371469.405-590.394342.669320.188NANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▂▂▂▂▂▃▁▂▁▂▃▁▁▄▃█-4.437-9.783-16.108-4.058-2.23618.8-26.183-5.044-28.4332.87224.252-29.452-29.53142.47311.497128.775NANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▂▁▆▆█▂▃▄▄▁▇▂█▂▂-463.247-328.427-625.511359.537320.479763.318-519.606-160.777-123.245-91.878-529.897556.616-356.622666.56-370.305-407.283NANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▅▂▁▃▄█▅26.498-47.25-78.263-30.47615.549129.71747.556NANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 us-gaap:AmortizationOfFinancingCosts us-gaap:CreditFacility,us-gaap:LongtermDebtType us-gaap:RevolvingCreditFacility,us-gaap:LineOfCredit█████▁▄▂▂▄0.2750.2750.2750.2750.2750.1090.1760.1410.1410.18NANANANANANANANA
 us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument,us-gaap:LongtermDebtType nmrk:SixPointOneTwoFivePercentSeniorNotes,us-gaap:SeniorNotes▂▂▂▂▂▂█▂▂▁0.3210.3210.3210.3210.3210.3210.3390.3210.3210.319NANANANANANANANA
us-gaap:DeferredIncomeTaxExpenseBenefit NANA0.4390.004NANA-28.8080.0NANA12.028-0.036NANANANANANA
us-gaap:IncreaseDecreaseInAccountsReceivable ▅▅▄▃▂▁▆▅▆▄█▆▆▆▆▅▆▄16.07615.154-3.014-22.541-36.188-62.027.7289.41619.586-4.70962.23722.76625.11319.37421.46613.86526.184-4.34
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▆█▂▃▁█▆▆▅▆▂▇▁▇▆494.182290.96563.356-385.955-302.694-652.401593.345174.805179.17739.433303.993-515.371469.405-590.394342.669320.188NANA
us-gaap:NetIncomeLoss █▂▂▃▂▂▂▃▂▂▂▃▂▂▁▃▂▂439.74433.105-3.78175.3490.3148.182-10.96588.69822.66816.90417.75968.2370.73919.997-46.17198.80755.14536.711
us-gaap:ProfitLoss █▂▁▃▂▂▃▃▂▂▂▃▂▂▁▃▂▂585.19144.578-5.12799.5250.64414.238161.712122.56932.06423.40639.559115.5584.29432.487-45.53898.4755.15737.007
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▂▂▂▂▂▃▁▂▁▂▃▁▁▄▃█-4.437-9.783-16.108-4.058-2.23618.8-26.183-5.044-28.4332.87224.252-29.452-29.53142.47311.497128.775NANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▁▂▃▁▆▇█▃▄▆▁▅▁▄▃▃▂3.662.4433.4444.2052.1289.84911.07912.7074.8045.93610.231.6587.4141.7145.7365.1095.1713.053
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▂▁▆▆█▂▃▄▄▁▇▂█▂▂-463.247-328.427-625.511359.537320.479763.318-519.606-160.777-123.245-91.878-529.897556.616-356.622666.56-370.305-407.283NANA
us-gaap:PaymentsForRepurchaseOfCommonStock █▁45.9199.283NANANANA3.38520.087NANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:RelatedPartyTransactionsByRelatedParty nmrk:CantorFitzgeraldCoNANA8.5e-07NANA2.45e-082.45e-082.33e-08NA2.97e-08NA2.4e-082.4e-082.18e-08NANANANA

Common Stock Value

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

nmrk:ContingentClassACommonStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1572000.01572000.01572000.01160000.01050000.01050000.01461000.03250000.02956000.03141000.03250000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.10.10.10.1
Percentage of Assets nmrk:ContingentClassACommonStock0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassA


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1772000.01695000.01676000.01632000.01623000.01612000.01608000.01590000.01583000.01574000.01570000.01389000.01389000.01389000.01386000.0
Percentage of CommonStockValue112.7107.8106.6140.7154.6153.5110.148.953.650.148.30.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.10.00.00.00.00.00.00.00.1
Percentage of Assets us-gaap:CommonClassA0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value212000.0212000.0212000.0212000.0212000.0212000.0212000.0212000.0212000.0212000.0212000.0158000.0158000.0158000.0158000.0
Percentage of CommonStockValue13.513.513.518.320.220.214.56.57.26.76.50.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonClassB


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value212121212121212121212115151515
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value273271266178263206208269185155246
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value185183179178177177178178155155155
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value9.2970.661620.0771020.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.00.0100.0100.00.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2.350.17-0.030.4-0.010.03-0.080.480.110.080.090.4300.13
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2.130.16-0.030.39-0.010.03-0.080.480.110.080.080.4300.12
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:PlanName

us-gaap:AllocatedShareBasedCompensationExpense

nmrk:A2021EquityEvent


Allocated
Period End2021-06-28
Value428
Percentage of AllocatedShareBasedCompensationExpense100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nmrk:A2021EquityEvent0.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value44032-2.2274-1.0136.90511788221617680.73919-46.171985536
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax80.27.80.024.3-0.41.80.024.86.54.50.016.20.25.60.024.813.611.0

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value58543-3.56698-0.683121611223223391154.29432-45.538985537
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax106.810.60.032.2-0.23.30.034.29.36.30.027.41.19.10.024.713.611.1

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value980437540402336457626527498400568449440383
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax178.8105.40.0131.7121.0116.10.0147.5144.0107.20.0106.7113.8107.2

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value135107796161928586101879184807560525947
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.625.80.020.221.923.40.024.129.423.50.020.220.721.10.013.114.714.2

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value72755-6.2921320.73219-16.45915941307615115398.5441005636
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax132.613.30.043.50.34.80.044.511.98.10.035.93.911.00.025.214.011.1

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value14210-1.165330.0884.797-0.132369.1216.6873635106.933541.9891.422-0.015
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax25.92.50.010.90.01.20.010.32.61.80.08.52.81.90.00.50.4-0.0

Income Taxes Paid

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value230.10510111.58156128.98914590.2620.8690.0150.0190.0130.0090.0060.018
Percentage of IncomeTaxesPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.30.00.03.70.614.40.02.54.215.90.00.20.00.00.00.00.00.0

Interest Expense

us-gaap:InterestExpense us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:InterestExpense

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.091.071.542.1432.6461.6550.8850.8460.8930.433
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.30.00.71.00.40.00.20.30.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RevolvingCreditFacility us-gaap:LineOfCredit0.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestExpense us-gaap:DebtInstrument, us-gaap:LongtermDebtType

nmrk:SixPointOneTwoFivePercentSeniorNotes, us-gaap:SeniorNotes


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value9.3299.3218.299.2989.2939.2858.89.2689.2599.249
Percentage of InterestExpense855.9871.1538.3433.9351.2561.0994.41095.51036.82136.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.72.20.03.03.32.40.02.62.72.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nmrk:SixPointOneTwoFivePercentSeniorNotes us-gaap:SeniorNotes0.00.00.00.00.00.00.00.00.00.0

Interest Expense Long Term Debt

us-gaap:InterestExpenseLongTermDebt us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:InterestExpenseLongTermDebt

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.6090.5821.1141.8052.3391.361.2330.5520.6030.112
Percentage of InterestExpenseLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.00.60.80.30.00.20.20.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RevolvingCreditFacility us-gaap:LineOfCredit0.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestExpenseLongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

nmrk:SixPointOneTwoFivePercentSeniorNotes, us-gaap:SeniorNotes


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value8.7158.7117.5958.7028.6978.6938.6598.6848.688.676
Percentage of InterestExpenseLongTermDebt1431.01496.7681.8482.1371.8639.2702.31573.21439.57746.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.62.10.02.83.12.20.02.42.52.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nmrk:SixPointOneTwoFivePercentSeniorNotes us-gaap:SeniorNotes0.00.00.00.00.00.00.00.00.00.0

Interest Income Expense Net

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-8723000.0-8813000.0-9111000.0-9532000.0-10056000.0-9030000.0-8141000.0-8167000.0-8081000.0-7699000.0-14705000.0-11509000.0-10582000.0-13409000.0-1453000.01724000.01381000.01134000.0
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.6-2.10.0-3.1-3.6-2.30.0-2.3-2.3-2.10.0-2.7-2.7-3.70.00.40.30.3

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
Value170.892181.969191.122170.718180.288272020123.1555.585
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.20.20.00.67.00.30.00.25.30.10.04.95.33.60.01.4

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value43933-3.781750.3148.182-10.96588221617680.73919-46.171985536
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax80.28.00.024.70.12.10.024.86.54.50.016.20.25.60.024.813.611.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value14511-1.346240.336.056-5.362339.3966.50221473.555120.633-0.3370.0120.296
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.52.80.07.90.11.50.09.52.71.70.011.20.93.50.0-0.10.00.1

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value43531-5.42272-2.1315.737-14.19385191314660.54619-46.171985536
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax79.37.60.023.6-0.81.50.023.95.63.70.015.80.15.60.024.813.611.0

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value58343-40.141103-2.1318.933-14.2199923210.991800.54630
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax106.410.60.033.9-0.82.30.027.86.75.90.019.00.18.5

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value736632.8191421028-8.31816749379116225529.997985535
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax134.215.40.046.63.97.10.046.814.210.10.038.76.614.80.024.813.610.8

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value1086-2.21-58.367108-36.3891.438-14.313108-3.726
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax198.1-0.50.035.6-13.10.40.030.4-1.1

Preferred Stock Dividends Income Statement Impact

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:PreferredStockDividendsIncomeStatementImpact


Preferred
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3.22.42.43.23.23.23.23.21.70.2
Percentage of PreferredStockDividendsIncomeStatementImpact100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.00.90.60.00.90.90.90.00.40.1

us-gaap:PreferredStockDividendsIncomeStatementImpact us-gaap:ConsolidatedEntities

srt:ParentCompany


Preferred
Period End2021-06-302021-03-312020-06-302020-03-31
Value4.61.62.42.4
Percentage of PreferredStockDividendsIncomeStatementImpact0.00.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.40.90.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value58544-5.127990.644141611223223391154.29432-45.538985537
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax106.710.70.032.60.23.60.034.29.36.30.027.41.19.10.024.713.611.1

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value14511-1.346240.336.056-5.362339.3966.50221473.55512
Percentage of ProfitLoss24.925.726.324.351.242.5-3.327.629.327.855.140.982.838.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.52.80.07.90.11.50.09.52.71.70.011.20.93.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value43933-3.781750.3148.182-10.96588221617680.73919
Percentage of ProfitLoss75.174.373.775.748.857.5-6.872.470.772.244.959.117.261.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax80.28.00.024.70.12.10.024.86.54.50.016.20.25.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value548415457305278393863357346373534421387357460398405332
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

nmrk:CapitalMarkets


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1841211908252127165144128102150115101101126989577
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.729.241.527.219.032.519.140.437.227.528.127.426.328.327.524.723.523.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.729.241.527.219.032.519.140.437.227.528.127.426.328.327.524.723.523.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nmrk:CapitalMarkets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:LeasingAndOtherCommissions


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value184147138114120140251213217172276203178159186158144127
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.635.530.237.643.235.729.259.662.846.251.648.446.044.640.439.835.738.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.635.530.237.643.235.729.259.662.846.251.648.446.044.640.439.835.738.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nmrk:LeasingAndOtherCommissions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:ManagementServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1791461291071051251261041179810810110796
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.735.328.235.237.831.914.729.133.926.320.324.227.727.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.735.328.235.237.831.914.729.133.926.320.324.227.727.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nmrk:ManagementServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value629503601435383483632586551447631518466430460398405332
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax114.8121.3131.3142.8138.0122.873.3163.9159.3119.9118.1123.1120.6120.4100.0100.0100.0100.0

us-gaap:Revenues us-gaap:ProductOrService

nmrk:CapitalMarketsCommissions


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1841211908252127165144128102150115101
Percentage of Revenues29.324.131.619.013.826.426.124.723.323.023.822.321.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.729.241.527.219.032.519.140.437.227.528.127.426.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nmrk:CapitalMarketsCommissions0.00.00.00.00.00.00.0100.0100.00.00.0100.0100.0

nmrk:Commissions


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-03-31
Value369268328197173268416357346275260
Percentage of Revenues58.653.354.645.445.155.565.961.062.861.560.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax67.364.771.864.862.268.148.3100.0100.073.772.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nmrk:Commissions0.00.00.00.00.00.00.00.00.0100.0100.0

nmrk:GainsFromMortgageBankingActivitiesOriginationNet


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4147100916950497245314951413841457345
Percentage of Revenues6.69.416.720.918.010.47.812.38.27.07.810.09.09.09.111.418.213.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.511.421.929.924.812.85.720.213.08.49.312.310.810.99.111.418.213.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nmrk:GainsFromMortgageBankingActivitiesOriginationNet0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

nmrk:LeasingAndOtherCommissions


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value184147138114120140251213217172276203178159186158144127
Percentage of Revenues29.329.323.026.431.329.039.836.439.438.543.739.338.237.040.439.835.738.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.635.530.237.643.235.729.259.662.846.251.648.446.044.640.439.835.738.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nmrk:LeasingAndOtherCommissions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:ManagementServicesServicingFeesAndOther


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value219187172146141165166156160141155147144130105959182
Percentage of Revenues34.837.328.733.736.934.126.326.729.131.524.728.431.130.423.024.122.624.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.045.237.748.150.941.919.343.746.337.829.135.037.436.623.024.122.624.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nmrk:ManagementServicesServicingFeesAndOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value463440003982467841323886320135833506345334543721283730572273
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities

srt:ParentCompany


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value137013121246948
Percentage of Assets34.441.036.141.7
Percentage of Assets34.441.036.141.7
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value304230093041376532262943223925752464240523712708205825032029
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets65.775.276.480.578.175.869.971.970.369.768.672.872.681.989.3

us-gaap:Liabilities us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilitiesus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value715712678688
Percentage of Liabilities23.531.828.633.9
Percentage of Assets18.022.319.730.3
Percentage of Assets srt:ParentCompany52.254.354.572.5

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value463440003982467841323886320135833506345334543721283730572273
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-12-312019-12-312018-12-312017-12-31
Value137013121246948
Percentage of LiabilitiesAndStockholdersEquity34.441.036.141.7
Percentage of Assets34.441.036.141.7
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1225689655648572573599610559564567334286294260
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.417.216.413.913.914.818.717.016.016.316.49.010.19.611.5

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value655599567260
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets16.418.716.411.5
Percentage of Assets srt:ParentCompany47.845.745.527.5

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value22391503181924651939166110731554156515521757205712981595825
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets48.337.645.752.746.942.833.543.444.644.950.955.345.852.236.3

us-gaap:AssetsCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Assets
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.0760.1010.02411
Percentage of AssetsCurrent0.00.00.01.4
Percentage of Assets0.00.00.00.5
Percentage of Assets srt:ParentCompany0.00.00.01.2

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value16514219127230629116311610772122706048121
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.63.64.85.87.47.55.13.23.12.13.51.92.11.65.3

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.0760.1010.0240.0010.001
Percentage of CashAndCashEquivalentsAtCarryingValue0.00.10.00.00.0
Percentage of Assets0.00.00.00.00.0
Percentage of Assets srt:ParentCompany0.00.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-03-312016-12-31
Value237211258336367351221174165137187292173137117
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.15.36.57.28.99.06.94.94.74.05.49.67.60.00.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.0760.1010.0240.0010.001
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents0.00.00.00.00.0
Percentage of Assets0.00.00.00.00.0
Percentage of Assets srt:ParentCompany0.00.00.00.00.0

Marketable Securities Current

us-gaap:MarketableSecuritiesCurrent

us-gaap:MarketableSecuritiesCurrent


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-11-302019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value10934.001331210.00.03698123334348939.1278.62257
Percentage of MarketableSecuritiesCurrent100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets23.60.10.82.60.00.01.10.03.41.01.31.42.50.30.32.5

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value8473638879131917479515753483620
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.81.81.61.91.93.42.82.12.31.51.71.41.71.20.9

us-gaap:OtherAssetsCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-312019-12-31
Value188179
Percentage of OtherAssetsCurrent295.1197.2
Percentage of Assets4.75.6
Percentage of Assets srt:ParentCompany13.713.7

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value209206183184181178164164150144137126119113110
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.55.24.64.04.44.65.14.64.34.24.03.44.23.74.9

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

nmrk:LeaseHoldImprovementsAndOtherFixedAssets


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value151148126129127125119114101989990847977
Percentage of PropertyPlantAndEquipmentGross72.071.968.969.970.170.472.969.367.868.072.371.170.469.869.9
Percentage of Assets3.33.73.22.83.13.23.73.22.92.82.92.43.02.63.4
Percentage of Assets nmrk:LeaseHoldImprovementsAndOtherFixedAssets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ComputerEquipment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value262626252524232020191617161615
Percentage of PropertyPlantAndEquipmentGross12.712.814.313.913.813.614.012.713.513.612.114.014.214.514.4
Percentage of Assets0.60.70.70.60.60.60.70.60.60.60.50.50.60.50.7
Percentage of Assets us-gaap:ComputerEquipment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SoftwareAndSoftwareDevelopmentCosts


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value323130292928212928262118181717
Percentage of PropertyPlantAndEquipmentGross15.215.316.916.216.015.913.117.918.718.415.614.915.415.715.7
Percentage of Assets0.70.80.80.60.70.70.70.80.80.80.60.50.60.60.8
Percentage of Assets us-gaap:SoftwareAndSoftwareDevelopmentCosts0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value969187827875667166625854524845
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.12.32.21.81.91.92.12.01.91.81.71.51.81.62.0

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.41.71.61.71.71.61.52.81.31.31.61.21.31.50.97.41.51.3
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value11311596102102103989383817872676464
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.42.92.42.22.52.73.12.62.42.42.31.92.42.12.9

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

srt:ParentCompany


Investments
Period End2020-12-312019-12-312018-12-312017-12-31
Value501543501101
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0
Percentage of Assets12.617.014.54.5
Percentage of Assets srt:ParentCompany36.641.440.210.7

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value597593560559559559557539543515515513481474477412
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.914.814.112.013.514.417.415.115.514.914.913.817.015.521.00.0

us-gaap:Goodwill us-gaap:BusinessAcquisition

nmrk:HVS


Goodwillus-gaap:
Period End2020-12-312020-09-302020-01-31
Value6.36.36.294
Percentage of Goodwill1.11.10.0
Percentage of Assets0.20.10.0
Percentage of Assets nmrk:HVS0.00.00.0

nmrk:Knotel


Goodwillus-gaap:
Period End2021-06-302021-03-312021-01-31
Value373333
Percentage of Goodwill6.25.60.0
Percentage of Assets0.80.80.0
Percentage of Assets nmrk:Knotel0.00.00.0

nmrk:PriorPeriodAcquisitions


Goodwillus-gaap:
Period End2020-12-31
Value6.294
Percentage of Goodwill1.1
Percentage of Assets0.2
Percentage of Assets nmrk:PriorPeriodAcquisitions0.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:TrademarksAndTradeNames


Indefinite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value11111111111111111111114.44.44.44.4
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.30.30.20.30.30.40.30.30.30.30.10.20.10.2
Percentage of Assets us-gaap:TrademarksAndTradeNames0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value576144464850453235343529262524
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.51.11.01.21.31.40.91.01.01.00.80.90.81.1

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsNet

nmrk:BelowMarketLeases


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value0.1420.7390.7610.7830.8050.896
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets nmrk:BelowMarketLeases0.00.00.00.00.00.0

us-gaap:CustomerContracts


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value11131.4681.571.6721.7731.8751.3971.510.5410.6030.6650.7270.7880.85
Percentage of FiniteLivedIntangibleAssetsNet0.00.01033.8212.4219.7226.4232.90.00.00.067.30.00.00.00.0
Percentage of Assets0.30.30.00.00.00.00.10.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CustomerContracts0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CustomerRelatedIntangibleAssets


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value181920212223185.9236.6346.937.4338.6257.9768.046.455
Percentage of FiniteLivedIntangibleAssetsNet0.00.014367.62883.12923.42995.42255.00.00.00.0829.60.00.00.00.0
Percentage of Assets0.40.50.50.50.50.60.60.20.20.20.20.20.30.30.3
Percentage of Assets us-gaap:CustomerRelatedIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LicensingAgreements


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.2290.4710.7150.9591.2021.4461.6932.0232.1892.4412.6892.9363.1843.4333.683
Percentage of FiniteLivedIntangibleAssetsNet0.00.0503.5129.8158.0184.7210.30.00.00.0300.10.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.10.10.10.10.10.10.10.10.2
Percentage of Assets us-gaap:LicensingAgreements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncompeteAgreements


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.1473.3923.6373.8874.1464.2334.5194.2814.3184.5584.7985.6074.2452.9663.11
Percentage of FiniteLivedIntangibleAssetsNet0.00.02561.3526.0544.8540.6561.40.00.00.0535.50.00.00.00.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.20.10.10.1
Percentage of Assets us-gaap:NoncompeteAgreements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets


Finite
Period End2021-06-302021-03-312020-12-31
Value3.0693.9850.142
Percentage of FiniteLivedIntangibleAssetsNet0.00.0100.0
Percentage of Assets0.10.10.0
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.0

us-gaap:TrademarksAndTradeNames


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.7574.0871.1851.3531.5341.6511.4411.2293.0122.4022.611.7310.7550.8781.031
Percentage of FiniteLivedIntangibleAssetsNet0.00.0834.5183.1201.6210.9179.00.00.00.0291.30.00.00.00.0
Percentage of Assets0.10.10.00.00.00.00.00.00.10.10.10.00.00.00.0
Percentage of Assets us-gaap:TrademarksAndTradeNames0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value187182154154154149166166166168
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.75.74.34.44.54.34.55.95.57.4

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value409422190191191195201202192182178
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.810.64.84.14.65.06.35.65.55.30.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value239331322379383413407599558549369368322287278
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.28.38.18.19.310.612.716.715.915.910.79.911.49.412.3

us-gaap:OtherAssetsNoncurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value188179152164
Percentage of OtherAssetsNoncurrent58.344.141.159.1
Percentage of Assets4.75.64.47.2
Percentage of Assets srt:ParentCompany13.713.712.217.3

Accounts Payable And Accrued Liabilities Current

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent us-gaap:ConsolidatedEntities

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

srt:ParentCompany


Accounts
Period End2020-12-312019-12-312018-12-312017-12-31
Value30748416
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent100.0100.0100.0100.0
Percentage of Assets0.82.32.40.7
Percentage of Assets srt:ParentCompany2.25.76.81.7

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value16951468170522511655137510451604152215231664210112301527782
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.636.742.848.140.135.432.744.843.444.148.256.543.450.034.4

us-gaap:LiabilitiesCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-12-312019-12-312018-12-312017-12-31
Value3412314117
Percentage of LiabilitiesCurrent2.011.88.52.2
Percentage of Assets0.93.94.10.8
Percentage of Assets srt:ParentCompany2.59.411.31.8

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value455029282928272522
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.01.30.70.60.70.70.80.70.7

Taxes Payable Current

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


Taxes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value6931253816186953223077480.111
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.50.80.60.80.40.52.21.50.60.92.31.30.0

us-gaap:TaxesPayableCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Taxes
Period End2020-12-312019-12-312018-12-312017-12-31
Value2267797.059
Percentage of TaxesPayableCurrent88.497.8101.66359.5
Percentage of Assets0.62.12.30.3
Percentage of Assets srt:ParentCompany1.75.26.30.7

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value682681680879953952589598582538537133247400670
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.717.017.118.823.124.518.416.716.615.615.63.68.713.129.5

us-gaap:LongTermDebtNoncurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value680589537670
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0
Percentage of Assets17.118.415.629.5
Percentage of Assets srt:ParentCompany49.744.943.270.7

us-gaap:LongTermDebtNoncurrent us-gaap:ConsolidatedEntities, us-gaap:CreditFacility, us-gaap:LongtermDebtType

srt:ParentCompany, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Long
Period End2020-12-312019-12-312018-12-31
Value137480.0
Percentage of LongTermDebtNoncurrent20.28.30.0
Percentage of Assets3.51.50.0
Percentage of Assets srt:ParentCompany us-gaap:RevolvingCreditFacility us-gaap:LineOfCredit0.00.00.0

us-gaap:LongTermDebtNoncurrent us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

srt:ParentCompany, nmrk:SixPointOneTwoFivePercentSeniorNotes, us-gaap:SeniorNotes


Long
Period End2020-12-312019-12-312018-12-31
Value542540537
Percentage of LongTermDebtNoncurrent79.891.7100.0
Percentage of Assets13.616.915.6
Percentage of Assets srt:ParentCompany nmrk:SixPointOneTwoFivePercentSeniorNotes us-gaap:SeniorNotes0.00.00.0

us-gaap:LongTermDebtNoncurrent us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value138137137337412411480.0
Percentage of LongTermDebtNoncurrent20.320.220.238.443.243.28.30.0
Percentage of Assets3.03.43.57.210.010.61.50.0
Percentage of Assets us-gaap:RevolvingCreditFacility us-gaap:LineOfCredit0.00.00.00.00.00.00.00.0

us-gaap:LongTermDebtNoncurrent us-gaap:DebtInstrument, us-gaap:LongtermDebtType

nmrk:SixPointOneTwoFivePercentSeniorNotes, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value543543542542541540540537
Percentage of LongTermDebtNoncurrent79.779.879.861.656.856.891.7100.0
Percentage of Assets11.713.613.611.613.113.916.915.6
Percentage of Assets nmrk:SixPointOneTwoFivePercentSeniorNotes us-gaap:SeniorNotes0.00.00.00.00.00.00.00.0

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value345281266241312347340368456456489653470237-38.092
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.57.06.75.27.68.910.610.313.013.214.217.616.67.8-1.7

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value246433436418401394376372359343168173169163163
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.310.811.08.99.710.111.810.410.29.94.94.76.05.37.2

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value418426218216215221227228220
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.010.75.54.65.25.77.16.46.3

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value76894241434242
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.72.21.10.91.11.11.3

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value71804039403939
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.52.01.00.81.01.01.2

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value66703737383838
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.81.00.80.91.01.2

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-312020-06-302020-03-312019-12-31
Value36353535
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0100.0100.0100.0
Percentage of Assets0.90.90.91.1

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value126155146146146
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0100.0100.0100.0100.0
Percentage of Assets3.23.33.63.84.6

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-01-01
Value463477248245244249255254243226
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.011.96.25.35.96.48.07.16.90.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value579640329329328337347
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.516.08.37.17.98.710.9

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1151638184838792
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.54.12.01.82.02.32.9

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1225689655648572573599610559564567334286294260
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.417.216.413.913.914.818.717.016.016.316.49.010.19.611.5

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value655599567260
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets16.418.716.411.5
Percentage of Assets srt:ParentCompany47.845.745.527.5

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value1571970921890884920940978101610201056988757531222983804
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.924.323.119.021.423.729.427.329.029.630.626.626.717.49.80.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

nmrk:ContingentClassACommonStock, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value1.5721.5721.5721.161.051.051.4613.252.9563.1413.250.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.10.20.20.10.10.10.20.30.30.30.30.00.0
Percentage of Assets0.00.00.00.00.00.00.00.10.10.10.10.00.0
Percentage of Assets nmrk:ContingentClassACommonStock us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassA, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value1.7721.6951.6761.6321.6231.6121.6081.591.5831.5741.571.3860.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.10.20.20.20.20.20.20.20.20.20.10.60.0
Percentage of Assets0.00.00.00.00.00.00.10.00.00.00.00.10.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value0.2120.2120.2120.2120.2120.2120.2120.2120.2120.2120.2120.1580.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.10.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value506364351335329324318294292284285556054590.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest32.237.538.237.737.235.333.830.128.827.827.05.68.010.226.70.0
Percentage of Assets10.99.18.87.28.08.49.98.28.38.28.31.52.11.82.60.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-2.192-2.612-2.094-3.739-2.604-1.277
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.1-0.3-0.2-0.4-0.3-0.1
Percentage of Assets-0.0-0.1-0.1-0.1-0.1-0.0
Percentage of Assets us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value345281266241312347340368456456489653470237-38.0922.0073.841
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest22.029.028.927.135.337.736.237.644.944.746.366.162.144.7-17.10.20.5
Percentage of Assets7.57.06.75.27.68.910.610.313.013.214.217.616.67.8-1.70.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value80537234234827828231334427727527727722423819924577
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest51.338.437.239.131.430.633.335.227.327.026.328.129.744.889.725.09.6
Percentage of Assets17.49.38.67.46.77.39.89.67.98.08.07.57.97.88.80.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStockCommon


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value-87.94-48.221-40.531-34.894-34.894-34.894-34.894-34.469-14.382-0.486-0.4860.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-5.6-5.0-4.4-3.9-3.9-3.8-3.7-3.5-1.4-0.0-0.00.00.0
Percentage of Assets-1.9-1.2-1.0-0.7-0.8-0.9-1.1-1.0-0.4-0.0-0.00.00.0
Percentage of Assets us-gaap:TreasuryStockCommon0.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

nmrk:ContingentClassACommonStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1572000.01572000.01572000.01160000.01050000.01050000.01461000.03250000.02956000.03141000.03250000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.10.10.10.1
Percentage of Assets nmrk:ContingentClassACommonStock0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassA


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1772000.01695000.01676000.01632000.01623000.01612000.01608000.01590000.01583000.01574000.01570000.01389000.01389000.01389000.01386000.0
Percentage of CommonStockValue112.7107.8106.6140.7154.6153.5110.148.953.650.148.30.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.10.00.00.00.00.00.00.00.1
Percentage of Assets us-gaap:CommonClassA0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value212000.0212000.0212000.0212000.0212000.0212000.0212000.0212000.0212000.0212000.0212000.0158000.0158000.0158000.0158000.0
Percentage of CommonStockValue13.513.513.518.320.220.214.56.57.26.76.50.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value50636435133532932431829429228428555605459
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.99.18.87.28.08.49.98.28.38.28.31.52.11.82.6

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value805372342348278282313344277275277277224238199
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.49.38.67.46.77.39.89.67.98.08.07.57.97.88.8

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-2192000.0-2612000.0-2094000.0-3739000.0-2604000.0-1277000.00
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.00.0
Percentage of Assets-0.0-0.1-0.1-0.1-0.1-0.00.0

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value345281266241312347340368456456489653470237-38.092
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.57.06.75.27.68.910.610.313.013.214.217.616.67.8-1.7

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:StockIssuedDuringPeriodValueNewIssues


Stock
Period End2021-06-302021-03-31
Value0.04.025
Percentage of StockIssuedDuringPeriodValueNewIssues0.0100.0
Percentage of Assets0.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:RelatedPartyTransactionsByRelatedParty

srt:BoardOfDirectorsChairman


Stock
Period End2021-03-16
Value21
Percentage of StockIssuedDuringPeriodValueNewIssues0.0
Percentage of Assets0.0
Percentage of Assets srt:BoardOfDirectorsChairman0.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Stock
Period End2021-06-302021-03-31
Value0.04.025
Percentage of StockIssuedDuringPeriodValueNewIssues0.0100.0
Percentage of Assets0.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.0

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value4.4472.9963.0013.3662.7242.199-1.4661.1950.271
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value3.8472.0572.0612.2651.5181.804-1.4661.1950.271
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue86.568.768.767.355.782.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.60.9390.941.1011.2060.395
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue13.531.331.332.744.318.0
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.0

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-7.2384.013-22.2446.53370.9526.024261427182912
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-7.2384.013-22.2446.53370.9526.024261427182912
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value494290563-385.955-302.694-652.40159317417939303-515.371469-590.394342320
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax90.170.0123.0-126.4-108.8-165.668.748.851.810.656.8-122.3121.3-165.174.480.4

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-4.437-9.783-16.108-4.058-2.23618-26.183-5.044-28.4332.87224-29.452-29.5314211128
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.8-2.4-3.5-1.3-0.84.8-3.0-1.4-8.20.84.5-7.0-7.611.92.532.3

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-463.247-328.427-625.511359320763-519.606-160.777-123.245-91.878-529.897556-356.622666-370.305-407.283
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-84.5-79.1-136.6117.7115.2193.8-60.2-44.9-35.6-24.6-99.1132.1-92.1186.4-80.4-102.3

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value26-47.25-78.263-30.4761512947
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.8-11.4-17.1-10.05.632.95.5

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:AmortizationOfFinancingCosts

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value275000.0275000.0275000.0275000.0275000.0109000.0176000.0141000.0141000.0180000.0
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument, us-gaap:LongtermDebtType

nmrk:SixPointOneTwoFivePercentSeniorNotes, us-gaap:SeniorNotes


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value321000.0321000.0321000.0321000.0321000.0321000.0339000.0321000.0321000.0319000.0
Percentage of AmortizationOfFinancingCosts116.7116.7116.7116.7116.7294.5192.6227.7227.7177.2

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-30
Value0.4390.004-28.8080.012-0.036
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.00.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1615-3.014-22.541-36.188-62.0279.41619-4.70962222519211326-4.34
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value494290563-385.955-302.694-652.40159317417939303-515.371469-590.394342320
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax90.170.0123.0-126.4-108.8-165.668.748.851.810.656.8-122.3121.3-165.174.480.4

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value43933-3.781750.3148.182-10.96588221617680.73919-46.171985536
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax80.28.0-0.824.70.12.1-1.324.86.54.53.316.20.25.6-10.024.813.611.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value58544-5.127990.644141611223223391154.29432-45.538985537
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax106.710.7-1.132.60.23.618.734.29.36.37.427.41.19.1-9.924.713.611.1

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value14511-1.346240.336.056-5.362339.3966.50221473.55512
Percentage of ProfitLoss24.925.726.324.351.242.5-3.327.629.327.855.140.982.838.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.52.8-0.37.90.11.5-0.69.52.71.74.111.20.93.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value43933-3.781750.3148.182-10.96588221617680.73919
Percentage of ProfitLoss75.174.373.775.748.857.5-6.872.470.772.244.959.117.261.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax80.28.0-0.824.70.12.1-1.324.86.54.53.316.20.25.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-4.437-9.783-16.108-4.058-2.23618-26.183-5.044-28.4332.87224-29.452-29.5314211128
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.8-2.4-3.5-1.3-0.84.8-3.0-1.4-8.20.84.5-7.0-7.611.92.532.3

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.662.4433.4444.2052.1289.84911124.8045.936101.6587.4141.7145.7365.1095.1713.053
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-463.247-328.427-625.511359320763-519.606-160.777-123.245-91.878-529.897556-356.622666-370.305-407.283
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-84.5-79.1-136.6117.7115.2193.8-60.2-44.9-35.6-24.6-99.1132.1-92.1186.4-80.4-102.3

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-06-302021-03-312019-12-312019-09-30
Value459.2833.38520
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:DebtInstrumentInterestRateStatedPercentage

nmrk:CantorFitzgeraldCo


Debt
Period End2020-12-312020-03-312019-12-312019-09-302019-03-312018-09-302018-06-302018-03-31
Value0.850.02450.02450.02330.02970.0240.0240.0218
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations nmrk:CantorFitzgeraldCo0.00.00.00.00.00.00.00.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod us-gaap:ConsolidatedEntities, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

nmrk:BGCHoldingsLimitedPartnership, nmrk:LimitedPartnershipUnits


Share
Period End2020-09-302019-12-312019-09-30
Value0.53.10.6
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod100.0100.0100.0

nmrk:NewmarkHoldingsLimitedPartnership, nmrk:LimitedPartnershipUnits


Share
Period End2020-12-312019-12-312019-09-30
Value2.38.71.6
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod0.0280.6266.7

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value238216180186
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsNet us-gaap:PlanName

nmrk:A2021EquityEvent


Deferred
Period End2021-06-28
Value101
Percentage of DeferredTaxAssetsNet0.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value208000.0208000.0208000.0200000.0700000.0200000.0200000.0208000.0
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value2035000.03973000.01297000.0403000.0
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0

nmrk:AllocationOfIncomeLossToLimitedPartnershipInterestDiluted

nmrk:AllocationOfIncomeLossToLimitedPartnershipInterestDiluted


Allocation
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value14812310.03.196-0.026143.8648.288-13.543131.73110
Percentage of AllocationOfIncomeLossToLimitedPartnershipInterestDiluted100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:AllocationsOfNetIncomeAndGrantOfExchangeabilityToLimitedPartnershipUnitsAndFPUsAndIssuanceOfCommonStock

nmrk:AllocationsOfNetIncomeAndGrantOfExchangeabilityToLimitedPartnershipUnitsAndFPUsAndIssuanceOfCommonStock


Allocations
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2671456501012148563913
Percentage of AllocationsOfNetIncomeAndGrantOfExchangeabilityToLimitedPartnershipUnitsAndFPUsAndIssuanceOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:AveragePriceOfUnitsRedeemed us-gaap:StatementClassOfStock

nmrk:AveragePriceOfUnitsRedeemed

us-gaap:CommonClassA


Average
Period End2021-06-302021-03-31
Value11.9111.09
Percentage of AveragePriceOfUnitsRedeemed100.0100.0

nmrk:BusinessCombinationConsiderationTransferredDebtorInPossessionFinancing us-gaap:BusinessAcquisition

nmrk:BusinessCombinationConsiderationTransferredDebtorInPossessionFinancing

nmrk:Knotel


Business
Period End2021-06-302021-01-312021-03-31
Value0.01919
Percentage of BusinessCombinationConsiderationTransferredDebtorInPossessionFinancing0.0100.0100.0

nmrk:BusinessCombinationConsiderationTransferredFirstAndSecondLienDebt us-gaap:BusinessAcquisition

nmrk:BusinessCombinationConsiderationTransferredFirstAndSecondLienDebt

nmrk:Knotel


Business
Period End2021-06-302021-01-312021-03-31
Value0.33939
Percentage of BusinessCombinationConsiderationTransferredFirstAndSecondLienDebt100.0100.0100.0

nmrk:CapitalAccountThreshold us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:CapitalAccountThreshold

nmrk:NonExchangeableHDU, srt:ChiefExecutiveOfficer


Capital
Period End2021-06-28
Value5400000.0
Percentage of CapitalAccountThreshold100.0

nmrk:CommonStockExchangeabilityGrantedIssuedExpense

nmrk:CommonStockExchangeabilityGrantedIssuedExpense


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2416.611330.1250.0072.47432-0.5012.5590.661
Percentage of CommonStockExchangeabilityGrantedIssuedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:CommonStockExchangeabilityGrantedIssuedExpense us-gaap:ConsolidatedEntities, us-gaap:PartnerTypeOfPartnersCapitalAccount

srt:ParentCompany, nmrk:LimitedPartnershipUnits


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2421.21847130.3068.11914217210.661
Percentage of CommonStockExchangeabilityGrantedIssuedExpense100.318.4139.910594.44371.4328.2433.3-3492.8840.6100.0

nmrk:CommonStockExchangeabilityGrantedIssuedExpense us-gaap:PartnerTypeOfPartnersCapitalAccount

nmrk:LimitedPartnershipUnits


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value181-5.39413130.2995.64510917180.0
Percentage of CommonStockExchangeabilityGrantedIssuedExpense75.3-81.639.910494.44271.4228.2333.3-3492.8740.60.0

nmrk:CompensationAndEmployeeBenefitsNet

nmrk:CompensationAndEmployeeBenefitsNet


Compensation
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
Value303418304241313503397356277441332334278357289262225
Percentage of CompensationAndEmployeeBenefitsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:CompensationAndEmployeeBenefitsNet us-gaap:RelatedPartyTransaction

nmrk:EmployeeLoans


Compensation
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value17231817147.313117.4
Percentage of CompensationAndEmployeeBenefitsNet5.75.66.07.34.61.43.33.12.7

nmrk:ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposureWithoutCreditProtection us-gaap:CounterpartyName, us-gaap:ManagingRisksInherentInServicingAssetsAndServicingLiabilitiesByTypeOfRisk

nmrk:ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposureWithoutCreditProtection

nmrk:DBCayman, us-gaap:CreditRisk


Concentration
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value56735147738219161141000.01005600
Percentage of ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposureWithoutCreditProtection100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

nmrk:ContractuallySpecifiedServicingFeesAncillaryFeesEscrowInterestAndPlacementFeesEarnedInExchangeForServicingFinancialAssets

nmrk:ContractuallySpecifiedServicingFeesAncillaryFeesEscrowInterestAndPlacementFeesEarnedInExchangeForServicingFinancialAssets


Contractually
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value363634323032333635343534322829292624
Percentage of ContractuallySpecifiedServicingFeesAncillaryFeesEscrowInterestAndPlacementFeesEarnedInExchangeForServicingFinancialAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:DeterminationPrice us-gaap:PreferredUnitsByName, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:DeterminationPrice

nmrk:PreferredUnits, srt:ChiefFinancialOfficer


Determination
Period End2021-03-162019-12-19
Value15.5712.355
Percentage of DeterminationPrice100.0100.0

nmrk:EarningsPerSharePotentiallyDilutiveSecuritiesShares

nmrk:EarningsPerSharePotentiallyDilutiveSecuritiesShares


Earnings
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.11.0970.6
Percentage of EarningsPerSharePotentiallyDilutiveSecuritiesShares100.0100.0100.0100.0

nmrk:EquityBasedCompensationAndAllocationOfNetIncomeToLimitedPartnershipUnitsAndFPUs

nmrk:EquityBasedCompensationAndAllocationOfNetIncomeToLimitedPartnershipUnitsAndFPUs


Equity
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value281141012563913406717
Percentage of EquityBasedCompensationAndAllocationOfNetIncomeToLimitedPartnershipUnitsAndFPUs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:EquityBasedCompensationAndAllocationOfNetIncomeToLimitedPartnershipUnitsAndFPUs us-gaap:ConsolidatedEntities

srt:ParentCompany


Equity
Period End2021-06-302021-03-312020-06-302020-03-31
Value267141012
Percentage of EquityBasedCompensationAndAllocationOfNetIncomeToLimitedPartnershipUnitsAndFPUs94.999.7100.0100.0

nmrk:EquitybasedcompensationandallocationofnetincometolimitedpartnershipunitsandFPUs

nmrk:EquitybasedcompensationandallocationofnetincometolimitedpartnershipunitsandFPUs


Equitybasedcompensationandallocationofnetincometolimitedpartnershipunitsand
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value56501012148563913
Percentage of EquitybasedcompensationandallocationofnetincometolimitedpartnershipunitsandFPUs100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:EquitybasedcompensationandallocationofnetincometolimitedpartnershipunitsandFPUs us-gaap:ConsolidatedEntities

srt:ParentCompany


Equitybasedcompensationandallocationofnetincometolimitedpartnershipunitsand
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value56501012148563913
Percentage of EquitybasedcompensationandallocationofnetincometolimitedpartnershipunitsandFPUs100.0100.0101.1100.0100.0100.0100.0100.0

nmrk:EscrowInterestAndPlacementFeesAmount

nmrk:EscrowInterestAndPlacementFeesAmount


Escrow
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.080.9711.1450.8760.7273.3924.9126.5185.6245.3636.0645.3953.8672.9673.0132.8352.0211.459
Percentage of EscrowInterestAndPlacementFeesAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:FairValueOfExpectedNetFutureCashFlowsFromServicingRecognizedAtCommitmentNet

nmrk:FairValueOfExpectedNetFutureCashFlowsFromServicingRecognizedAtCommitmentNet


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value252862604229303724162828242123254229
Percentage of FairValueOfExpectedNetFutureCashFlowsFromServicingRecognizedAtCommitmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:GainOnOriginatedMortgageServicingRights

nmrk:GainOnOriginatedMortgageServicingRights


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value224867533438293521172933256.38922294028
Percentage of GainOnOriginatedMortgageServicingRights100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:GainsLossesRecognizedForChangeInFairValueOnLoansHeldForSale

nmrk:GainsLossesRecognizedForChangeInFairValueOnLoansHeldForSale


Gains
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value1.7864.035-2.8062.01036-17.326-3.212
Percentage of GainsLossesRecognizedForChangeInFairValueOnLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:IncreaseDecreaseInRightOfUseLiability

nmrk:IncreaseDecreaseInRightOfUseLiability


Increase
Period End2021-06-302021-03-312020-06-302020-03-31
Value-13.679-7.481-4.615-5.606
Percentage of IncreaseDecreaseInRightOfUseLiability100.0100.0100.0100.0

nmrk:IncrementalCommonSharesAttributableToCantorUnits

nmrk:IncrementalCommonSharesAttributableToCantorUnits


Incremental
Period End2021-06-30
Value23
Percentage of IncrementalCommonSharesAttributableToCantorUnits100.0

nmrk:IncrementalCommonSharesAttributableToExchange

nmrk:IncrementalCommonSharesAttributableToExchange


Incremental
Period End2021-06-30
Value1170000.0
Percentage of IncrementalCommonSharesAttributableToExchange100.0

nmrk:IncrementalCommonSharesAttributableToLimitedPartnershipInterests

nmrk:IncrementalCommonSharesAttributableToLimitedPartnershipInterests


Incremental
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5983860.084-0.078282889-23.639296.28390
Percentage of IncrementalCommonSharesAttributableToLimitedPartnershipInterests100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:IncrementalCommonSharesAttributableToOtherInstruments

nmrk:IncrementalCommonSharesAttributableToOtherInstruments


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4149000.03165000.0101000.0155000.001370000.0891000.0344000.0627000.0455000.0-18000.0856000.0781000.0918000.0
Percentage of IncrementalCommonSharesAttributableToOtherInstruments100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:IncrementalCommonSharesAttributabletoExchange

nmrk:IncrementalCommonSharesAttributabletoExchange


Incremental
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1219000.0-1000.0225000.00240000.0-30000.0344000.0399000.0455000.0
Percentage of IncrementalCommonSharesAttributabletoExchange100.0100.0100.00.0100.0100.0100.0100.0100.0

nmrk:IssuanceAndRedemptionOfLimitedPartnershipUnitsIncludingContingentUnits

nmrk:IssuanceAndRedemptionOfLimitedPartnershipUnitsIncludingContingentUnits


Issuance
Period End2020-09-302020-06-302020-03-312019-09-302018-09-30
Value0.00.00.907-4.3069.462
Percentage of IssuanceAndRedemptionOfLimitedPartnershipUnitsIncludingContingentUnits0.00.0100.0100.0100.0

nmrk:IssuanceAndRedemptionOfLimitedPartnershipUnitsIncludingContingentUnits us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

nmrk:ContingentClassACommonStock, us-gaap:CommonStock


Issuance
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.4120.110.0-0.411-0.185-0.109
Percentage of IssuanceAndRedemptionOfLimitedPartnershipUnitsIncludingContingentUnits0.00.00.0-45.30.00.0

nmrk:IssuanceAndRedemptionOfLimitedPartnershipUnitsIncludingContingentUnits us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Issuance
Period End2020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-0.049-0.110.00.425-1.4490.1850.109
Percentage of IssuanceAndRedemptionOfLimitedPartnershipUnitsIncludingContingentUnits0.00.00.046.933.70.00.0

us-gaap:NoncontrollingInterest


Issuance
Period End2020-12-312020-09-302020-06-302020-03-312019-09-302018-09-30
Value-1.270.00.00.893-2.8579.462
Percentage of IssuanceAndRedemptionOfLimitedPartnershipUnitsIncludingContingentUnits0.00.00.098.566.3100.0

nmrk:IssuanceOfAdditionalLimitedPartnersUnitsInExchangeForCashPayment us-gaap:ConsolidatedEntities, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:IssuanceOfAdditionalLimitedPartnersUnitsInExchangeForCashPayment

nmrk:NewmarkHoldingsLimitedPartnership, nmrk:CantorCommercialRealEstateCompany


Issuance
Period End2020-12-312018-10-31
Value0500000.0
Percentage of IssuanceOfAdditionalLimitedPartnersUnitsInExchangeForCashPayment0.0100.0

nmrk:IssuanceOfLimitedPartnersUnitsExchanges us-gaap:ConsolidatedEntities, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:IssuanceOfLimitedPartnersUnitsExchanges

nmrk:NewmarkHoldingsLimitedPartnership, nmrk:CantorCommercialRealEstateCompany


Issuance
Period End2020-12-312018-10-31
Value02200000.0
Percentage of IssuanceOfLimitedPartnersUnitsExchanges0.0100.0

nmrk:MinorityInterestDecreaseFromRedemptionsOfExchangeablePartnershipUnits

nmrk:MinorityInterestDecreaseFromRedemptionsOfExchangeablePartnershipUnits


Minority
Period End2021-06-302020-12-312020-09-302019-12-312019-09-30
Value1670.0930.093
Percentage of MinorityInterestDecreaseFromRedemptionsOfExchangeablePartnershipUnits100.00.0100.00.0100.0

nmrk:MinorityInterestDecreaseFromRedemptionsOfExchangeablePartnershipUnits us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302020-12-312020-09-302019-12-312019-09-30
Value1670.0930.093
Percentage of MinorityInterestDecreaseFromRedemptionsOfExchangeablePartnershipUnits100.00.0100.00.0100.0

nmrk:NetIncomeLossAfterAdjustmentsForNoncashAndNonoperatingItems

nmrk:NetIncomeLossAfterAdjustmentsForNoncashAndNonoperatingItems


Net
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
Value-317.786-553.6694102884701700-199.648-155.297-185.342-274.703521-487.692527-322.247-320.452116-323.635
Percentage of NetIncomeLossAfterAdjustmentsForNoncashAndNonoperatingItems100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:NoncashChangesInAcquisitionEarnouts

nmrk:NoncashChangesInAcquisitionEarnouts


Noncash
Period End2021-06-302021-03-312020-06-302020-03-312019-06-302019-03-31
Value338000.0414000.01102000.0-12813000.0238000.0193000.0
Percentage of NoncashChangesInAcquisitionEarnouts100.0100.0100.0100.0100.0100.0

nmrk:NoncontrollingInterestIncreaseDecreaseFromGrantOfExchangeabilityRedemptionAndIssuanceOfLimitedPartnershipInterests

nmrk:NoncontrollingInterestIncreaseDecreaseFromGrantOfExchangeabilityRedemptionAndIssuanceOfLimitedPartnershipInterests


Noncontrolling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value19113215.2790.1371.989110.6821.668-15.53129.6666419
Percentage of NoncontrollingInterestIncreaseDecreaseFromGrantOfExchangeabilityRedemptionAndIssuanceOfLimitedPartnershipInterests100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:NoncontrollingInterestIncreaseDecreaseFromGrantOfExchangeabilityRedemptionAndIssuanceOfLimitedPartnershipInterests us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


Noncontrolling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0770.0190.0440.0090.0110.0040.0180.0070.0090.004
Percentage of NoncontrollingInterestIncreaseDecreaseFromGrantOfExchangeabilityRedemptionAndIssuanceOfLimitedPartnershipInterests0.00.10.20.28.00.20.21.00.5-0.0

nmrk:NoncontrollingInterestIncreaseDecreaseFromGrantOfExchangeabilityRedemptionAndIssuanceOfLimitedPartnershipInterests us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Noncontrolling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value11910134.5252.244.423222.8725.332-0.572
Percentage of NoncontrollingInterestIncreaseDecreaseFromGrantOfExchangeabilityRedemptionAndIssuanceOfLimitedPartnershipInterests62.478.263.585.71635.0222.4203.7421.1319.73.7

us-gaap:NoncontrollingInterest


Noncontrolling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value712.9647.7650.745-2.114-2.438-9.926-2.197-3.673-14.9626.2279.6666419
Percentage of NoncontrollingInterestIncreaseDecreaseFromGrantOfExchangeabilityRedemptionAndIssuanceOfLimitedPartnershipInterests37.621.736.314.1-1543.1-122.6-88.0-322.1-220.296.350.8100.0100.0100.0

nmrk:NumberOfNonExchangeablePSURedeemed us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:NumberOfNonExchangeablePSURedeemed

nmrk:NonExchangeablePSU, srt:ChiefFinancialOfficer


Number
Period End2021-06-28
Value6000.0
Percentage of NumberOfNonExchangeablePSURedeemed100.0

nmrk:OtherComprehensiveIncomeLossNetofTaxExcludingOther

nmrk:OtherComprehensiveIncomeLossNetofTaxExcludingOther


Other
Period End2020-09-302020-06-30
Value-1135000.0-1009000.0
Percentage of OtherComprehensiveIncomeLossNetofTaxExcludingOther100.0100.0

nmrk:OtherComprehensiveIncomeLossNetofTaxExcludingOther us-gaap:StatementEquityComponents

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2020-09-302020-06-30
Value-1135000.0-1009000.0
Percentage of OtherComprehensiveIncomeLossNetofTaxExcludingOther100.0100.0

nmrk:PaymentToRedeemExchangeableSharesNet dei:LegalEntity, us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:PaymentToRedeemExchangeableSharesNet

nmrk:BGCPartnersInc, nmrk:NonExchangeablePPSU, srt:BoardOfDirectorsChairman


Payment
Period End2021-06-28
Value1500000.0
Percentage of PaymentToRedeemExchangeableSharesNet100.0

nmrk:PaymentToRedeemExchangeableSharesNet dei:LegalEntity, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock

nmrk:BGCPartnersInc, srt:ChiefExecutiveOfficer, us-gaap:CommonClassA


Payment
Period End2021-06-28
Value300000.0
Percentage of PaymentToRedeemExchangeableSharesNet20.0

nmrk:BGCPartnersInc, srt:ChiefFinancialOfficer, us-gaap:CommonClassA


Payment
Period End2021-06-28
Value100000.0
Percentage of PaymentToRedeemExchangeableSharesNet6.7

nmrk:PaymentToRedeemExchangeableSharesNet us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:ExchangeablePPSU, srt:ChiefFinancialOfficer


Payment
Period End2021-06-28
Value200000.0
Percentage of PaymentToRedeemExchangeableSharesNet13.3

nmrk:PaymentToRedeemExchangeableSharesNet us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock

srt:BoardOfDirectorsChairman, us-gaap:CommonClassA


Payment
Period End2021-06-28
Value1500000.0
Percentage of PaymentToRedeemExchangeableSharesNet100.0

srt:ChiefExecutiveOfficer, us-gaap:CommonClassA


Payment
Period End2021-06-28
Value800000.0
Percentage of PaymentToRedeemExchangeableSharesNet53.3

nmrk:PaymentToRedeemNonExchangeableSharesNet dei:LegalEntity, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:PaymentToRedeemNonExchangeableSharesNet

nmrk:BGCPartnersInc, srt:ChiefExecutiveOfficer


Payment
Period End2021-06-28
Value1100000.0
Percentage of PaymentToRedeemNonExchangeableSharesNet100.0

nmrk:BGCPartnersInc, srt:ChiefFinancialOfficer


Payment
Period End2021-06-28
Value100000.0
Percentage of PaymentToRedeemNonExchangeableSharesNet9.1

nmrk:PaymentToRedeemNonExchangeableSharesNet us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:NonExchangeableHDU, srt:BoardOfDirectorsChairman


Payment
Period End2021-06-28
Value8000000.0
Percentage of PaymentToRedeemNonExchangeableSharesNet727.3

nmrk:NonExchangeablePPSU, nmrk:ChiefLegalOfficer


Payment
Period End2021-06-28
Value300000.0
Percentage of PaymentToRedeemNonExchangeableSharesNet27.3

nmrk:NonExchangeablePPSU, srt:BoardOfDirectorsChairman


Payment
Period End2021-06-28
Value8800000.0
Percentage of PaymentToRedeemNonExchangeableSharesNet800.0

nmrk:PaymentToRedeemSharesNet dei:LegalEntity, us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:PaymentToRedeemSharesNet

nmrk:BGCPartnersInc, nmrk:BGCHoldingsHUD, srt:BoardOfDirectorsChairman


Payment
Period End2021-06-28
Value8000000.0
Percentage of PaymentToRedeemSharesNet100.0

nmrk:PaymentToRedeemSharesNet us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:NonExchangeablePPSU, srt:ExecutiveVicePresident


Payment
Period End2021-04-27
Value200000.0
Percentage of PaymentToRedeemSharesNet0.0

nmrk:PaymentToRedeemSharesNet us-gaap:AwardType, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

nmrk:NonExchangeablePPSU, srt:ExecutiveVicePresident, us-gaap:SubsequentEvent


Payment
Period End2021-04-27
Value173860.0
Percentage of PaymentToRedeemSharesNet0.0

nmrk:PaymentToRedeemSharesNet us-gaap:PreferredUnitsByName, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:PreferredUnits, srt:ChiefFinancialOfficer


Payment
Period End2021-03-16
Value76407.0
Percentage of PaymentToRedeemSharesNet0.0

nmrk:PaymentToRedeemSharesNet us-gaap:RelatedPartyTransactionsByRelatedParty

srt:ExecutiveVicePresident


Payment
Period End2021-04-272021-03-16
Value800000.0321190.0
Percentage of PaymentToRedeemSharesNet0.00.0

nmrk:PaymentToRedeemSharesNet us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

srt:ExecutiveVicePresident, us-gaap:SubsequentEvent


Payment
Period End2021-04-27
Value815880.0
Percentage of PaymentToRedeemSharesNet0.0

nmrk:PercentageOfContingentLiabilityOfActualLossesIncurredOnOutstandingLoans us-gaap:Range, us-gaap:DebtInstrument

nmrk:PercentageOfContingentLiabilityOfActualLossesIncurredOnOutstandingLoans

srt:Maximum, nmrk:FannieMaeDUSOrFreddieTargetedAffordableHousingLoans


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value033.0032.6700.3300
Percentage of PercentageOfContingentLiabilityOfActualLossesIncurredOnOutstandingLoans0.0100.00.0100.00.0100.00.00.0

nmrk:PotentialLossOnLiquidationOfLoan us-gaap:FinancingReceivablesPeriodPastDue

nmrk:PotentialLossOnLiquidationOfLoan

us-gaap:FinancingReceivables60To89DaysPastDue


Potential
Period End2021-06-302021-03-312020-12-31
Value100000.01400000.0-700000.0
Percentage of PotentialLossOnLiquidationOfLoan100.0100.0100.0

nmrk:ProceedsFromIssuanceOfAdditionalLimitedPartnersUnitsWithCapitalAccount us-gaap:ConsolidatedEntities, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:ProceedsFromIssuanceOfAdditionalLimitedPartnersUnitsWithCapitalAccount

nmrk:NewmarkHoldingsLimitedPartnership, nmrk:CantorCommercialRealEstateCompany


Proceeds
Period End2020-12-312018-10-31
Value02200000.0
Percentage of ProceedsFromIssuanceOfAdditionalLimitedPartnersUnitsWithCapitalAccount0.0100.0

nmrk:ProceedsFromRepaymentsOfSecuritiesLoaned

nmrk:ProceedsFromRepaymentsOfSecuritiesLoaned


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0-33.278330.00.0-36.73511-8.822-10.08543
Percentage of ProceedsFromRepaymentsOfSecuritiesLoaned0.0100.0100.00.00.0100.0100.0100.0100.0100.0

nmrk:ProceedsReceivedToRepurchaseShares us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType, us-gaap:SubsidiarySaleOfStock

nmrk:ProceedsReceivedToRepurchaseShares

nmrk:CFSecuredLLC, srt:AffiliatedEntity, us-gaap:SubsequentEvent, nmrk:NasdaqEarnOut


Proceeds
Period End2021-08-02
Value260
Percentage of ProceedsReceivedToRepurchaseShares100.0

nmrk:ProvisionForRiskSharingObligations

nmrk:ProvisionForRiskSharingObligations


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-4.7-1.6-3.10.00.214-0.03-0.0280.00.041-0.0190.003-0.0130.017-0.01-0.133-0.062-0.001
Percentage of ProvisionForRiskSharingObligations100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:ProvisiononCreditLossesSharingGuarantee

nmrk:ProvisiononCreditLossesSharingGuarantee


Provisionon
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-1.648-3.070.00.222140.00.0
Percentage of ProvisiononCreditLossesSharingGuarantee100.0100.00.0100.0100.00.00.0

nmrk:RealizedGainLossOnNonMarketableInvestments

nmrk:RealizedGainLossOnNonMarketableInvestments


Realized
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value-57.3490.0-10.0-16.837-8.801
Percentage of RealizedGainLossOnNonMarketableInvestments100.00.0100.0100.0100.0

nmrk:RelatedPartyAccountsReceivableAllowanceForCreditLossPeriodIncreaseDecrease

nmrk:RelatedPartyAccountsReceivableAllowanceForCreditLossPeriodIncreaseDecrease


Related
Period End2020-09-30
Value500000.0
Percentage of RelatedPartyAccountsReceivableAllowanceForCreditLossPeriodIncreaseDecrease100.0

nmrk:RepaymentOfSecurityDeposit

nmrk:RepaymentOfSecurityDeposit


Repayment
Period End2021-03-23
Value25
Percentage of RepaymentOfSecurityDeposit100.0

nmrk:RightOfUseAssetIncreaseDecrease

nmrk:RightOfUseAssetIncreaseDecrease


Right
Period End2021-06-302021-03-312020-06-302020-03-31
Value-13.179-7.459-4.334-6.151
Percentage of RightOfUseAssetIncreaseDecrease100.0100.0100.0100.0

nmrk:ServicingAssetAtAmortizedValuePurchasesFromAffiliate us-gaap:FairValueByAssetClass

nmrk:ServicingAssetAtAmortizedValuePurchasesFromAffiliate

nmrk:MortgageServicingRights


Servicing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value00108000.092000.0644000.0123000.0424000.0298000.0983000.0516000.01099000.0509000.01478000.00577000.0
Percentage of ServicingAssetAtAmortizedValuePurchasesFromAffiliate0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

nmrk:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingGrantDateFairValue us-gaap:ConsolidatedEntities

nmrk:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingGrantDateFairValue

nmrk:BGCHoldingPartnershipUnits


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-34.417675.694.424-1.35759
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingGrantDateFairValue100.0100.0100.0100.0100.0100.0

nmrk:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingGrantDateFairValue us-gaap:PartnerTypeOfPartnersCapitalAccount

nmrk:LimitedPartnershipUnits


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value681928.88110.143187
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingGrantDateFairValue-200.0283.8156.1260.0-10.5312.9

nmrk:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsForfeitedFairValue us-gaap:ConsolidatedEntities, us-gaap:AwardType

nmrk:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsForfeitedFairValue

nmrk:BGCHoldingPartnershipUnits, us-gaap:RestrictedStockUnitsRSU


Sharebased
Period End2020-12-312020-09-302020-06-302020-03-31
Value023000.0-2000.0-9000.0
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsForfeitedFairValue0.0100.0100.0100.0

nmrk:NewmarkHoldingsLimitedPartnership, us-gaap:RestrictedStockUnitsRSU


Sharebased
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value793000.0658000.0487000.01667000.0-270000.0-151000.0
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsForfeitedFairValue0.00.00.07247.813500.01677.8

nmrk:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedFairValue us-gaap:ConsolidatedEntities, us-gaap:AwardType

nmrk:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedFairValue

nmrk:BGCHoldingPartnershipUnits, us-gaap:RestrictedStockUnitsRSU


Sharebased
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.0290.0
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedFairValue0.00.0100.00.0

nmrk:NewmarkHoldingsLimitedPartnership, us-gaap:RestrictedStockUnitsRSU


Sharebased
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value144.1632.5112.3923716
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedFairValue0.00.00.00.0128824.10.0

nmrk:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSettledFairValue us-gaap:ConsolidatedEntities, us-gaap:AwardType

nmrk:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSettledFairValue

nmrk:BGCHoldingPartnershipUnits, us-gaap:RestrictedStockUnitsRSU


Sharebased
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.00.010.00.874-0.051-0.37
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSettledFairValue0.0100.00.0100.0100.0100.0

nmrk:NewmarkHoldingsLimitedPartnership, us-gaap:RestrictedStockUnitsRSU


Sharebased
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value1.7999.7852.46912-1.399-3.616
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSettledFairValue0.097850.00.01383.92743.1977.3

nmrk:SharesRedeemedOrExchanged dei:LegalEntity, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock

nmrk:SharesRedeemedOrExchanged

nmrk:BGCHoldingsLimitedPartnership, nmrk:Employees, nmrk:LimitedPartnershipUnits


Shares
Period End2021-06-28
Value8.0
Percentage of SharesRedeemedOrExchanged100.0

nmrk:BGCHoldingsLimitedPartnership, nmrk:IndependentContractors, nmrk:LimitedPartnershipUnits


Shares
Period End2021-06-28
Value17
Percentage of SharesRedeemedOrExchanged217.5

nmrk:NewmarkHoldingsLimitedPartnership, nmrk:Employees, nmrk:LimitedPartnershipUnits


Shares
Period End2021-06-28
Value8.3
Percentage of SharesRedeemedOrExchanged103.8

nmrk:NewmarkHoldingsLimitedPartnership, nmrk:IndependentContractors, nmrk:LimitedPartnershipUnits


Shares
Period End2021-06-28
Value23
Percentage of SharesRedeemedOrExchanged290.0

nmrk:TemporaryEquityDistributionOfIncome

nmrk:TemporaryEquityDistributionOfIncome


Temporary
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1735000.05000.0000005355000.0
Percentage of TemporaryEquityDistributionOfIncome100.0100.00.00.00.00.00.0100.0

nmrk:TemporaryEquityRedemptions

nmrk:TemporaryEquityRedemptions


Temporary
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value552000.0255000.0828000.0364000.0142000.0138000.0000927000.0
Percentage of TemporaryEquityRedemptions100.0100.0100.0100.0100.0100.00.00.00.0100.0

nmrk:TreasuryStockAcquiredAndRedeemedAverageCostPerShare us-gaap:StatementClassOfStock

nmrk:TreasuryStockAcquiredAndRedeemedAverageCostPerShare

us-gaap:CommonClassA


Treasury
Period End2021-06-302021-03-31
Value1.7510.59
Percentage of TreasuryStockAcquiredAndRedeemedAverageCostPerShare100.0100.0

nmrk:UnrealizedGainsLossOnLoansHeldForSale

nmrk:UnrealizedGainsLossOnLoansHeldForSale


Unrealized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.7864.035-2.8411.978-10.90336-17.348-3.176121317-6.827-7.838151.687-2.0270.4322.102
Percentage of UnrealizedGainsLossOnLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:ValueOfLPUIssuedInExchange us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:ValueOfLPUIssuedInExchange

srt:ChiefExecutiveOfficer


Value
Period End2021-03-262021-03-162019-12-19
Value5792100.05800000.05637500.0
Percentage of ValueOfLPUIssuedInExchange100.0100.0100.0

srt:ChiefFinancialOfficer


Value
Period End2021-03-162019-12-192019-02-06
Value62758.074250.074250.0
Percentage of ValueOfLPUIssuedInExchange1.11.30.0

us-gaap:AdjustmentForAmortization

us-gaap:AdjustmentForAmortization


Adjustment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1917231817147.29913117.4377.0399.0995.5966.0095.456242.3841.974
Percentage of AdjustmentForAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AncillaryFeeIncomeGeneratedByServicingFinancialAssetsAmount

us-gaap:AncillaryFeeIncomeGeneratedByServicingFinancialAssetsAmount


Ancillary
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.1322.6871.7692.061.2832.2412.4013.9554.1313.1843.5073.412.3740.8271.8311.5011.0851.323
Percentage of AncillaryFeeIncomeGeneratedByServicingFinancialAssetsAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisitionsProFormaRevenue us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionsProFormaRevenue

nmrk:Knotel


Business
Period End2021-06-30
Value17
Percentage of BusinessAcquisitionsProFormaRevenue100.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferred1

nmrk:HVS


Business
Period End2020-12-312020-01-31
Value0.09.839
Percentage of BusinessCombinationConsiderationTransferred10.0100.0

nmrk:Knotel


Business
Period End2021-01-31
Value66
Percentage of BusinessCombinationConsiderationTransferred10.0

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable us-gaap:AwardType, us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable

us-gaap:RestrictedStockUnitsRSU, nmrk:HVS


Business
Period End2020-12-31
Value0.0
Percentage of BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable0.0

us-gaap:RestrictedStockUnitsRSU, nmrk:Knotel


Business
Period End2021-06-302021-03-31
Value1.266
Percentage of BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable0.00.0

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable us-gaap:BusinessAcquisition

nmrk:NewmarkAcquisitionHoldingsLLC


Business
Period End2021-04-30
Value0.0188
Percentage of BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable0.0

us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferredLiabilitiesIncurred

nmrk:Knotel


Business
Period End2021-06-302021-01-312021-03-31
Value1.06.9586.9
Percentage of BusinessCombinationConsiderationTransferredLiabilitiesIncurred100.0100.0100.0

us-gaap:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual

us-gaap:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302018-12-312018-09-302018-06-30
Value2.31.91.41.91.7188.91.0
Percentage of BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareAdditions

us-gaap:CapitalizedComputerSoftwareAdditions


Capitalized
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value-600000.0500000.0800000.01300000.03000000.0600000.01600000.0600000.0900000.0500000.0500000.0500000.0100000.0
Percentage of CapitalizedComputerSoftwareAdditions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareAdditions us-gaap:PropertyPlantAndEquipmentByType

us-gaap:SoftwareAndSoftwareDevelopmentCosts


Capitalized
Period End2021-06-302021-03-312020-06-302020-03-31
Value0600000.0800000.01300000.0
Percentage of CapitalizedComputerSoftwareAdditions0.00.0100.0100.0

us-gaap:CapitalizedComputerSoftwareAmortization1

us-gaap:CapitalizedComputerSoftwareAmortization1


Capitalized
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value400000.0300000.0200000.0300000.0200000.0600000.0600000.0600000.0
Percentage of CapitalizedComputerSoftwareAmortization1100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareAmortization1 us-gaap:PropertyPlantAndEquipmentByType

us-gaap:SoftwareAndSoftwareDevelopmentCosts


Capitalized
Period End2021-06-302021-03-312020-06-302020-03-31
Value300000.0300000.0200000.0300000.0
Percentage of CapitalizedComputerSoftwareAmortization10.00.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared us-gaap:ConsolidatedEntities, us-gaap:SubsequentEventType

us-gaap:CommonStockDividendsPerShareDeclared

srt:ParentCompany, us-gaap:SubsequentEvent


Common
Period End2021-02-172020-02-12
Value0.010.1
Percentage of CommonStockDividendsPerShareDeclared100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

us-gaap:CommonClassA, us-gaap:SubsequentEvent


Common
Period End2021-08-05
Value0.01
Percentage of CommonStockDividendsPerShareDeclared0.0

us-gaap:CommonClassB, us-gaap:SubsequentEvent


Common
Period End2021-08-05
Value0.01
Percentage of CommonStockDividendsPerShareDeclared0.0

us-gaap:CommonStockDividendsPerShareDeclared us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Common
Period End2021-05-052021-02-172020-08-052019-10-292019-07-312019-02-112018-10-24
Value0.010.010.010.10.10.090.09
Percentage of CommonStockDividendsPerShareDeclared0.0100.00.00.00.00.00.0

us-gaap:ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType, us-gaap:InvestmentType

us-gaap:ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure

us-gaap:LiabilitiesTotal, us-gaap:CreditConcentrationRisk, nmrk:FannieMaeDUSAndFreddieMacTAHLoans


Concentration
Period End2021-06-302021-03-31
Value0.07400
Percentage of ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure0.0100.0

us-gaap:ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure us-gaap:CounterpartyName, us-gaap:ManagingRisksInherentInServicingAssetsAndServicingLiabilitiesByTypeOfRisk

nmrk:DBCayman, us-gaap:CreditRisk


Concentration
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-3.357-0.078-0.0099.6749790-0.1-2.912
Percentage of ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure0.00.00.00.00.00.00.00.0

us-gaap:ConcentrationRiskPercentage1 us-gaap:StatementGeographical, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType, us-gaap:InvestmentType

us-gaap:ConcentrationRiskPercentage1

stpr:CA, us-gaap:LiabilitiesTotal, us-gaap:CreditConcentrationRisk, nmrk:FannieMaeDUSAndFreddieMacTAHLoans


Concentration
Period End2021-03-312020-03-312019-03-31
Value21.00.210.24
Percentage of ConcentrationRiskPercentage1100.0100.0100.0

stpr:TX, us-gaap:LiabilitiesTotal, us-gaap:CreditConcentrationRisk, nmrk:FannieMaeDUSAndFreddieMacTAHLoans


Concentration
Period End2021-03-312020-03-312019-03-31
Value14.00.150.16
Percentage of ConcentrationRiskPercentage166.771.466.7

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerLiabilityRevenueRecognized


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value200000.01300000.0500000.0400000.01700000.0200000.0400000.01400000.0
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractuallySpecifiedServicingFeesAmount

us-gaap:ContractuallySpecifiedServicingFeesAmount


Contractually
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value343231292826262625252526262524242322
Percentage of ContractuallySpecifiedServicingFeesAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CostDirectLabor

us-gaap:CostDirectLabor


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value541289362253230300354341316263343291268261285270238
Percentage of CostDirectLabor100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:VariableRate

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

nmrk:CommittedLines, nmrk:WarehouseFacilityDueJuneSixteenTwoThousandTwentyOneSublimit, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
Period End2021-03-31
Value200.0
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0

us-gaap:DebtRelatedCommitmentFeesAndDebtIssuanceCosts us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:DebtRelatedCommitmentFeesAndDebtIssuanceCosts

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value206000.0213000.0151000.063000.032000.0186000.0146000.0153000.0149000.0141000.0
Percentage of DebtRelatedCommitmentFeesAndDebtIssuanceCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtRelatedCommitmentFeesAndDebtIssuanceCosts us-gaap:DebtInstrument, us-gaap:LongtermDebtType

nmrk:SixPointOneTwoFivePercentSeniorNotes, us-gaap:SeniorNotes


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value293000.0289000.0374000.0275000.0275000.0271000.0-210000.0263000.0
Percentage of DebtRelatedCommitmentFeesAndDebtIssuanceCosts142.2135.7247.7436.5859.4145.7-143.8171.9

us-gaap:DebtorReorganizationItemsDebtorInPossessionFacilityFinancingCosts us-gaap:BusinessAcquisition

us-gaap:DebtorReorganizationItemsDebtorInPossessionFacilityFinancingCosts

nmrk:Knotel


Debtor
Period End2021-01-31
Value19
Percentage of DebtorReorganizationItemsDebtorInPossessionFacilityFinancingCosts100.0

us-gaap:DebtorReorganizationItemsDebtorInPossessionFacilityFinancingCosts us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

nmrk:Knotel, us-gaap:SubsequentEvent


Debtor
Period End2021-01-31
Value20
Percentage of DebtorReorganizationItemsDebtorInPossessionFacilityFinancingCosts101.0

us-gaap:DeferredCompensationArrangementWithIndividualCompensationExpense

us-gaap:DeferredCompensationArrangementWithIndividualCompensationExpense


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value035000.0400000.0100000.0100000.0100000.0200000.0200000.0200000.0200000.0400000.0400000.0400000.01100000.0200000.0300000.0200000.0200000.0
Percentage of DeferredCompensationArrangementWithIndividualCompensationExpense0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5.84.39.35.33.44.99.04.44.44.93.73.63.23.23.43.02.83.0
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value302136292846323633282925202224292318
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DerivativeGainLossOnDerivativeNet

nmrk:ForwardSaleContracts, us-gaap:Nondesignated, nmrk:GainsFromMortgageBankingActivitiesOriginationsNet


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-10.0612.757241629-77.68250.012-20.784-3.632
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:NasdaqForwards, us-gaap:Nondesignated, us-gaap:OtherOperatingIncomeExpense


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-6.802-5.602-6.137-5.771-22.94521-13.936-8.214-15.638-13.329
Percentage of DerivativeGainLossOnDerivativeNet67.6-203.2-24.8-35.7-78.1-27.3-55.2-68450.075.2367.0

us-gaap:InterestRateLockCommitments, us-gaap:Nondesignated, nmrk:CostOfServicesDirectLabor


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1.06-1.117-0.492-0.6770.512-1.411-0.3840.2360.211-2.067
Percentage of DerivativeGainLossOnDerivativeNet10.5-40.5-2.0-4.21.71.8-1.51966.7-1.056.9

us-gaap:InterestRateLockCommitments, us-gaap:Nondesignated, nmrk:GainsFromMortgageBankingActivitiesOriginationsNet


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value154.694-25.879-3.951-10.20860-5.1975.734147.087
Percentage of DerivativeGainLossOnDerivativeNet-150.6170.3-104.5-24.4-34.7-77.4-20.647783.3-68.8-195.1

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

us-gaap:InterestRateLockCommitments, nmrk:CostOfServicesDirectLabor


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.11.10.50.70.51.40.4-0.20.22.1
Percentage of DerivativeGainLossOnDerivativeNet-10.939.92.04.31.7-1.81.6-1666.7-1.0-57.8

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:HedgingDesignation

us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-2.7740.732-7.7425.788-3.2532.2455.738-2.232-21.919-11.941-3.7027.439127.035-6.441-0.4967.9242.642
Percentage of DerivativeGainLossOnDerivativeNet27.626.6-31.335.8-11.1-2.922.7-18600.0105.5328.80.00.00.00.00.00.00.00.0

us-gaap:DistributionMadeToLimitedPartnerCashDistributionsDeclared us-gaap:ConsolidatedEntities, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:DistributionMadeToLimitedPartnerCashDistributionsDeclared

srt:ParentCompany, nmrk:LimitedPartnershipUnits


Distribution
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1410-0.292291.1040.5490.032116.313
Percentage of DistributionMadeToLimitedPartnerCashDistributionsDeclared100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:DividendsCommonStockStock

us-gaap:DividendsCommonStockStock


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.8521.8411.8091.7991.791717171716131313
Percentage of DividendsCommonStockStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockStock us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.8521.8411.8091.7991.791717171716131313
Percentage of DividendsCommonStockStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsPreferredStock us-gaap:StatementEquityComponents

us-gaap:DividendsPreferredStock

us-gaap:NoncontrollingInterest


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-4.559-1.641-1.641-3.25-2.447-2.445-3.228-3.2243.2243.224
Percentage of DividendsPreferredStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value4.5591.6411.6413.252.4472.4453.2283.224-3.224-3.2243.2251.866
Percentage of DividendsPreferredStock-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.00.00.0

us-gaap:EmployeeBenefitsAndShareBasedCompensation us-gaap:ConsolidatedEntities, us-gaap:AwardType

us-gaap:EmployeeBenefitsAndShareBasedCompensation

srt:ParentCompany, us-gaap:RestrictedStockUnitsRSU


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.4492.9973.253.4043.562.3512.0321.4131.1970.562
Percentage of EmployeeBenefitsAndShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeBenefitsAndShareBasedCompensation us-gaap:ConsolidatedEntities, us-gaap:PartnerTypeOfPartnersCapitalAccount

srt:ParentCompany, nmrk:LimitedPartnershipUnits


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value6.466-0.65.8844.9026.0111.8954.895.2395.0446.335
Percentage of EmployeeBenefitsAndShareBasedCompensation145.3-20.0181.0144.0168.880.6240.6370.8421.41127.2

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment us-gaap:BusinessAcquisition

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment

nmrk:Knotel


Equity
Period End2020-12-31
Value50
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment100.0

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss


Equity
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value2.5-26.7732-10.0-16.8-8.4173.917-0.60.5
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss us-gaap:BusinessAcquisition

nmrk:Knotel


Equity
Period End2020-12-31
Value-84.2
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss0.0

us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-0.10725-32.657-3.08-29.4311064.23209.1582.845-37.1543328
Percentage of FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss us-gaap:FinancialInstrument

nmrk:ForwardSaleContracts


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-5.2139.239-1.9937.32.0960.229121.5672.8455.964-12.3382016
Percentage of FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss4872.036.26.1-237.0-7.10.2303.17.831.1209.633.262.158.5

nmrk:NasdaqForwards


Fair
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value7.22-6.137-5.771-22.94547
Percentage of FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss28.318.8187.478.044.7

us-gaap:InterestRateLockCommitments


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value129.048-24.527-4.609-8.582585.3442621100.5136.21914
Percentage of FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss-11519.635.575.1149.629.255.1126.3133.2239.7358.9-1.418.851.4

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-2.245-31.48258.80726-78.609-57.0742829164.6911214
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss us-gaap:FinancialInstrument

nmrk:ContingentConsiderationLiability


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.84-19.5270.553-0.0610.616-0.7
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss-37.462.02.2-0.72.30.9

nmrk:ForwardSaleContracts


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-4.849-6.482268.88727-77.909-39.50825279.5969.1710.0370.641
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss216.020.6105.1100.9101.999.169.290.692.059.3195.50.34.3

us-gaap:InterestRateLockCommitments


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.764-5.471-1.844-0.019-1.1140.0-13.3221.1982.4285.19-4.6191213
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss-78.617.4-7.2-0.2-4.2-0.023.34.28.232.1-98.597.593.7

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-0.10712-32.657-3.08-29.431804.23209.1582.8450.853328
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1 us-gaap:FinancialInstrument

nmrk:ForwardSaleContracts


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-5.2139.239-1.9937.32.0960.229121.5672.8455.964-12.3382016
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings14872.072.86.1-237.0-7.10.3303.17.831.1209.6-1451.562.158.5

nmrk:NasdaqForwards


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-7.22-5.602-6.137-5.771-22.94521
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings16747.7-44.218.8187.478.026.4

us-gaap:InterestRateLockCommitments


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value129.048-24.527-4.609-8.582585.3442621100.5136.21914
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1-11519.671.375.1149.629.273.3126.3133.2239.7358.960.418.851.4

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.0280.00.00.0460.02416140.03018
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements0.0100.00.00.00.0100.00.0100.0100.0100.00.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements us-gaap:FinancialInstrument

nmrk:ForwardSaleContracts


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.07.6320.00.00.0140.02.8455.9648.1770.0169.687
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements0.026.60.00.00.031.00.011.536.954.80.053.252.5

us-gaap:InterestRateLockCommitments


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.0210.00.00.0320.021106.7320.0148.75
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements0.073.40.00.00.069.00.088.563.145.20.046.847.5

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-3.228-12.366238.63926-65.796-57.0742829164.5521214
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings us-gaap:FinancialInstrument

nmrk:ContingentConsiderationLiability


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-0.143-0.413-0.971-0.2290.1512
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings4.43.3-4.1-2.70.6-18.4

nmrk:ForwardSaleContracts


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-4.849-6.482268.88727-77.909-39.50825279.5969.1710.0370.641
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings150.252.4111.8102.9103.7118.469.290.692.059.3201.50.34.3

us-gaap:InterestRateLockCommitments


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.764-5.471-1.844-0.019-1.1140.0-13.3221.1982.4285.19-4.6191213
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings-54.644.2-7.7-0.2-4.2-0.023.34.28.232.1-101.597.593.7

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues


Fair
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value0.00.00.02.2216.021.187.7581.921100.688
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues0.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues us-gaap:FinancialInstrument

nmrk:ContingentConsiderationLiability


Fair
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.02.221
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues0.00.00.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.983301.0652.221-0.38271.2283115190.9741413
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements us-gaap:FinancialInstrument

nmrk:ContingentConsiderationLiability


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.983121.0652.221-0.381.943
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements100.040.8100.0100.0100.07.0

nmrk:ForwardSaleContracts


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.0140.00.00.0130.0279.5969.2080.00.6412.421
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements0.049.40.00.0-0.049.00.087.963.447.80.04.317.4

us-gaap:InterestRateLockCommitments


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.02.9770.00.00.0120.02.4285.197.470.0138.98
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements0.09.80.00.0-0.043.90.07.834.338.80.094.064.6

us-gaap:FeesAndCommissionsMortgageBankingAndServicing

us-gaap:FeesAndCommissionsMortgageBankingAndServicing


Fees
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value151837302621183420142023171718193015
Percentage of FeesAndCommissionsMortgageBankingAndServicing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FeesAndCommissionsMortgageBankingAndServicing us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:PrimaryServicingRights, nmrk:CantorCommercialRealEstateCompany


Fees
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.90.90.51.31.01.03.80.91.00.00.00.00.00.0
Percentage of FeesAndCommissionsMortgageBankingAndServicing5.84.81.34.33.74.720.32.64.90.00.00.00.00.0

us-gaap:GainLossOnSaleOfMortgageLoans

us-gaap:GainLossOnSaleOfMortgageLoans


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4147100916950497245314951413841457345
Percentage of GainLossOnSaleOfMortgageLoans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillAcquiredDuringPeriod

us-gaap:GoodwillAcquiredDuringPeriod


Goodwill
Period End2021-03-312020-03-312019-03-312018-03-31
Value336.2940.00.0
Percentage of GoodwillAcquiredDuringPeriod100.0100.00.00.0

us-gaap:GoodwillPurchaseAccountingAdjustments

us-gaap:GoodwillPurchaseAccountingAdjustments


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value59000.0-52000.0-496000.0925000.0689000.0-4994000.0-836000.0-195000.0-185000.05000.025000.051000.098000.0-2542000.0
Percentage of GoodwillPurchaseAccountingAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse us-gaap:PropertyPlantAndEquipmentByType

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse

us-gaap:SoftwareAndSoftwareDevelopmentCosts


Impairment
Period End2020-12-312020-09-302020-06-302020-03-31
Value4600000.01100000.0300000.01300000.0
Percentage of ImpairmentOfLongLivedAssetsHeldForUse100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-31
Value-1.01.030.0-7.4-4.11.251.34.8-2.25-0.0191.8433.1760.617
Percentage of IncomeLossFromEquityMethodInvestments100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableRelatedParties

us-gaap:IncreaseDecreaseInAccountsPayableRelatedParties


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-9.3484.679-1.6182.26-12.369-14.262175.6090.00.0
Percentage of IncreaseDecreaseInAccountsPayableRelatedParties100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:IncreaseDecreaseInAccruedSalaries

us-gaap:IncreaseDecreaseInAccruedSalaries


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value143-24.23221.616-10.065-89.742265420-62.051153633-35.069279.90442-33.599
Percentage of IncreaseDecreaseInAccruedSalaries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDueFromEmployeeCurrent

us-gaap:IncreaseDecreaseInDueFromEmployeeCurrent


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value257.726-2.1214101055948133924352524-0.83917116.226
Percentage of IncreaseDecreaseInDueFromEmployeeCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1166.839-42.38433-66.649-6.7366-7.65761-29.9783299.74530-10.6591411-2.237
Percentage of IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-74.147-8.788-21.5720-49.2752850192418-17.1682.4181014-24.706-6.4815.599-10.498
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndFeeIncomeLoansHeldForSaleMortgages

us-gaap:InterestAndFeeIncomeLoansHeldForSaleMortgages


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value2.9534.9818.666.86.35.7934.339146.5
Percentage of InterestAndFeeIncomeLoansHeldForSaleMortgages100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense

us-gaap:LaborAndRelatedExpense


Labor
Period End2021-06-302020-06-30
Value808241
Percentage of LaborAndRelatedExpense100.0100.0

us-gaap:LaborAndRelatedExpense us-gaap:RelatedPartyTransaction

nmrk:EmployeeLoans


Labor
Period End2021-06-302020-06-30
Value1917
Percentage of LaborAndRelatedExpense2.47.3

us-gaap:LeaseCost

us-gaap:LeaseCost


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value211212121212121312
Percentage of LeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityIncreaseDecreaseForPeriodNet us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:LineOfCreditFacilityIncreaseDecreaseForPeriodNet

nmrk:CommittedLines, nmrk:WarehouseFacilityDueOctoberEightTwoThousandTwentyOne


Line
Period End2021-02-01
Value300
Percentage of LineOfCreditFacilityIncreaseDecreaseForPeriodNet100.0

us-gaap:LineOfCreditFacilityIncreaseDecreaseForPeriodNet us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:SubsequentEventType

nmrk:CommittedLines, nmrk:WarehouseFacilityDueJuneSeventeenthTwoThousandTwenty, us-gaap:SubsequentEvent


Line
Period End2021-02-012020-01-13
Value300350
Percentage of LineOfCreditFacilityIncreaseDecreaseForPeriodNet100.00.0

nmrk:CommittedLines, nmrk:WarehouseFacilityDueOctoberEightTwoThousandTwentyOne, us-gaap:SubsequentEvent


Line
Period End2021-02-01
Value300
Percentage of LineOfCreditFacilityIncreaseDecreaseForPeriodNet100.0

us-gaap:LineOfCreditFacilityIncreaseDecreaseForPeriodNet us-gaap:CreditFacility, us-gaap:SubsequentEventType

nmrk:CommittedLines, us-gaap:SubsequentEvent


Line
Period End2020-10-312020-10-272020-07-16
Value500600200
Percentage of LineOfCreditFacilityIncreaseDecreaseForPeriodNet0.00.00.0

us-gaap:LineOfCreditFacilityIncreaseDecreaseForPeriodNet us-gaap:StatementScenario, us-gaap:CreditFacility

srt:ScenarioForecast, nmrk:CommittedLines


Line
Period End2020-08-29
Value400
Percentage of LineOfCreditFacilityIncreaseDecreaseForPeriodNet0.0

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod us-gaap:Range, us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod

srt:WeightedAverage, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-0.021.88-0.162.5017-0.0060.0343-0.654.3659-0.00080.0449
Percentage of LineOfCreditFacilityInterestRateDuringPeriod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MarketableSecuritiesRealizedGainLoss

us-gaap:MarketableSecuritiesRealizedGainLoss


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2.6931.950.00.02.2-2.2040.02.21.9-0.0511.7620.00.92.4
Percentage of MarketableSecuritiesRealizedGainLoss100.0100.00.00.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0

us-gaap:MarketableSecuritiesRealizedGainLoss us-gaap:FinancialInstrument

us-gaap:CommonStock


Marketable
Period End2021-03-312020-06-302020-03-312019-12-312019-09-30
Value2.0-2.22.20.02.2
Percentage of MarketableSecuritiesRealizedGainLoss102.6-100.0-99.80.0100.0

us-gaap:MarketableSecuritiesRealizedGainLoss us-gaap:FinancialInstrument, us-gaap:SubsidiarySaleOfStock

us-gaap:CommonStock, nmrk:NasdaqEarnOut


Marketable
Period End2020-09-30
Value121
Percentage of MarketableSecuritiesRealizedGainLoss0.0

us-gaap:MarketableSecuritiesRealizedGainLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancialInstrument

nmrk:Nasdaq, us-gaap:CommonStock


Marketable
Period End2021-06-30
Value0.7
Percentage of MarketableSecuritiesRealizedGainLoss26.0

us-gaap:MarketableSecuritiesUnrealizedGainLoss

us-gaap:MarketableSecuritiesUnrealizedGainLoss


Marketable
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-17.0390.3990.00.06.858-0.6651.153.96-2.09-0.5470.6480.796
Percentage of MarketableSecuritiesUnrealizedGainLoss100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MarketableSecuritiesUnrealizedGainLoss us-gaap:FinancialInstrument

us-gaap:CommonStock


Marketable
Period End2021-03-312019-12-312019-09-30
Value0.46.9-0.7
Percentage of MarketableSecuritiesUnrealizedGainLoss100.3100.6105.3

us-gaap:MarketableSecuritiesUnrealizedGainLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancialInstrument

nmrk:Nasdaq, us-gaap:CommonStock


Marketable
Period End2021-06-30
Value-14.8
Percentage of MarketableSecuritiesUnrealizedGainLoss86.9

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value21111212121212121110
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value21111212121111111110
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments dei:LegalEntity, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:BGCHoldingPartnershipUnits, srt:AffiliatedEntity


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.10.30.30.20.2
Percentage of OperatingLeasePayments0.52.52.41.61.6

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-420000.0625000.0-1561000.01135000.01327000.01277000.000
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.00.00.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value-420000.0625000.01009000.01277000.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax us-gaap:StatementEquityComponents

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value-420000.0518000.01009000.01277000.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax100.082.9100.0100.0

us-gaap:NoncontrollingInterest


Other
Period End2021-06-302021-03-31
Value0107000.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax-0.017.1

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value14511-1.346240.336.05644339.3966.50221473.555120.633-0.3370.0120.296
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeOtherNetOfTax

us-gaap:OtherComprehensiveIncomeOtherNetOfTax


Other
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value-76000.079000.0303000.01203000.02797000.0-688000.0
Percentage of OtherComprehensiveIncomeOtherNetOfTax100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeOtherNetOfTax us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Other
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value-76000.079000.0621000.01203000.02797000.0-688000.0
Percentage of OtherComprehensiveIncomeOtherNetOfTax100.0100.0205.0100.0100.0100.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest


Other
Period End2020-12-312020-09-302020-06-30
Value00-318000.0
Percentage of OtherComprehensiveIncomeOtherNetOfTax-0.00.0-105.0

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherOperatingActivitiesCashFlowStatement


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
Value890000.0885000.0-494000.0877000.051000.02971000.01026000.01189000.0878000.01167000.0919000.0158000.0254000.0255000.0
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForOriginationOfMortgageLoansHeldForSale

us-gaap:PaymentsForOriginationOfMortgageLoansHeldForSale


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
Value111821644088322625132545127140121944155426743278124914101529150339691842
Percentage of PaymentsForOriginationOfMortgageLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfCapitalDistribution

us-gaap:PaymentsOfCapitalDistribution


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1.8521.8411.8091.7991.7917171717161313
Percentage of PaymentsOfCapitalDistribution100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsOfFinancingCosts


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value672000.0516000.0539000.02340000.05000.01282000.049000.032000.0156000.01096000.040000.016000.0377000.0224000.0875000.09000.0
Percentage of PaymentsOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfMergerRelatedCostsFinancingActivities

us-gaap:PaymentsOfMergerRelatedCostsFinancingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-30
Value0.984370.8122.2220.01.7591.430.492.9170.00.9760.2456.7291.702
Percentage of PaymentsOfMergerRelatedCostsFinancingActivities100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireBusinessesGross

nmrk:HVS


Payments
Period End2020-12-31
Value0.0
Percentage of PaymentsToAcquireBusinessesGross0.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value4.558380.00.00.05.85152.009160.01.9827
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired100.0100.00.00.00.0100.0100.0100.0100.00.0100.0100.0

us-gaap:PaymentsToAcquireMortgageServicingRightsMSR

us-gaap:PaymentsToAcquireMortgageServicingRightsMSR


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value00108000.092000.0644000.0123000.0424000.0298000.0983000.0516000.01099000.0509000.0
Percentage of PaymentsToAcquireMortgageServicingRightsMSR0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireMortgageServicingRightsMSR us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:PrimaryServicingRights, nmrk:CantorCommercialRealEstateCompany


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-09-302017-09-30
Value00100000.0100000.0700000.0600000.0400000.0500000.00
Percentage of PaymentsToAcquireMortgageServicingRightsMSR0.00.092.6108.7108.7487.894.396.90.0

us-gaap:PaymentsToMinorityShareholders

us-gaap:PaymentsToMinorityShareholders


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-312017-06-302017-03-31
Value4.8596.5150.07.1643736271859330.00.10.00.071
Percentage of PaymentsToMinorityShareholders100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0

us-gaap:ProceedsFromIssuanceOfOtherLongTermDebt

us-gaap:ProceedsFromIssuanceOfOtherLongTermDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value25300.00.00.03650.0456050
Percentage of ProceedsFromIssuanceOfOtherLongTermDebt100.0100.00.00.00.0100.00.0100.0100.0100.0

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromLinesOfCredit


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value11182164408832262513254512714012194415542674327812491410
Percentage of ProceedsFromLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromLinesOfCredit us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Proceeds
Period End2021-06-302021-03-312020-12-31
Value-5.0300.0
Percentage of ProceedsFromLinesOfCredit-0.41.40.0

us-gaap:ProceedsFromPartnershipContribution

us-gaap:ProceedsFromPartnershipContribution


Proceeds
Period End2021-06-302021-03-31
Value0.04.025
Percentage of ProceedsFromPartnershipContribution0.0100.0

us-gaap:ProceedsFromPartnershipContribution us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:GeneralPartner, nmrk:CantorFitzgeraldCo


Proceeds
Period End2021-03-31
Value1.105598
Percentage of ProceedsFromPartnershipContribution27.5

us-gaap:LimitedPartner, nmrk:CantorFitzgeraldCo


Proceeds
Period End2021-03-31
Value2.918919
Percentage of ProceedsFromPartnershipContribution72.5

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3.781310.00.14734340.010139.106440.0-0.76352
Percentage of ProceedsFromSaleAndMaturityOfMarketableSecurities100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities us-gaap:FinancialInstrument

us-gaap:CommonStock


Proceeds
Period End2021-03-312020-03-312019-12-312019-09-30
Value31340.010
Percentage of ProceedsFromSaleAndMaturityOfMarketableSecurities99.9100.30.0100.0

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancialInstrument

nmrk:Nasdaq, us-gaap:CommonStock


Proceeds
Period End2021-06-30
Value3.8
Percentage of ProceedsFromSaleAndMaturityOfMarketableSecurities100.5

us-gaap:ProceedsFromSaleOfMortgageLoansHeldForSale

us-gaap:ProceedsFromSaleOfMortgageLoansHeldForSale


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
Value15252434453627802152205717434124201016852834268616588221829177438122139
Percentage of ProceedsFromSaleOfMortgageLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2874000.01190000.01692000.028000.0194000.02754000.0242000.0-70000.0689000.0956000.01154000.0159000.01077000.01140000.0
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5.7826.255.4476.1095.2055.8123.997.0887.2226.7256.3236.6446.3016.8946.5315.3554.1674.718
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:CantorFitzgeraldLimitedPartnershipAndBGCPartnersIncorporation


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value5.86.25.56.15.25.84.07.17.26.76.46.66.36.9-9.55.44.2
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty100.399.2101.099.999.999.8100.3100.299.799.6101.299.3100.0100.1-145.5100.8100.8

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1525240845372780215220521743412520101667283426861659820
Percentage of RepaymentsOfLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLinesOfCredit us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Repayments
Period End2021-06-302021-03-312020-12-31
Value-5.030200
Percentage of RepaymentsOfLinesOfCredit-0.31.24.4

us-gaap:RepaymentsOfLinesOfCredit us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


Repayments
Period End2021-07-312020-10-14
Value140100
Percentage of RepaymentsOfLinesOfCredit0.00.0

us-gaap:RepaymentsOfOtherLongTermDebt

us-gaap:RepaymentsOfOtherLongTermDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2530200750.00.010.0301550
Percentage of RepaymentsOfOtherLongTermDebt100.0100.0100.0100.00.00.0100.0100.0100.0100.0

us-gaap:RepaymentsOfRelatedPartyDebt us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RepaymentsOfRelatedPartyDebt

nmrk:CantorCommercialRealEstateCompany


Repayments
Period End2020-07-31
Value3.3
Percentage of RepaymentsOfRelatedPartyDebt100.0

us-gaap:RevenueFromRelatedParties us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RevenueFromRelatedParties

nmrk:CantorCommercialRealEstateCompany


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.50.50.10.40.10.2-0.50.10.50.2-0.30.30.00.00.00.0140.060
Percentage of RevenueFromRelatedParties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.0100.0

us-gaap:RevenueNotFromContractWithCustomer nmrk:OtherRevenueSources

us-gaap:RevenueNotFromContractWithCustomer

nmrk:MortgageBankingActivitiesAndOriginations


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value4147100916950497245
Percentage of RevenueNotFromContractWithCustomer100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:ServicingFeesAndOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value404143393639395242
Percentage of RevenueNotFromContractWithCustomer97.286.943.143.252.978.580.572.294.9

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value7.42124411131.1711212920-150.063182
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ServicingAssetAtAmortizedValueAdditions us-gaap:FairValueByAssetClass

us-gaap:ServicingAssetAtAmortizedValueAdditions

nmrk:MortgageServicingRights


Servicing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value224867533438293521172933256.38925294028
Percentage of ServicingAssetAtAmortizedValueAdditions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ServicingAssetAtAmortizedValueAmortization1 us-gaap:FairValueByAssetClass

us-gaap:ServicingAssetAtAmortizedValueAmortization1

nmrk:MortgageServicingRights


Servicing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value272626242322232221202120201919191817
Percentage of ServicingAssetAtAmortizedValueAmortization1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ServicingAssetAtFairValueAdditions us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:ServicingAssetAtFairValueAdditions

nmrk:PrimaryServicingRights, nmrk:CantorCommercialRealEstateCompany


Servicing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.00.01360.10.71373293001.00.50.50.5
Percentage of ServicingAssetAtFairValueAdditions0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ServicingAssetAtFairValuePeriodIncreaseDecrease us-gaap:VariableRate

us-gaap:ServicingAssetAtFairValuePeriodIncreaseDecrease

nmrk:DiscountRateOne


Servicing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-31
Value0-16300000.0-1600000.0-1100000.0-400000.0-11700000.0-300000.0100000.0-300000.0-11400000.01100000.0-12200000.0-13700000.0
Percentage of ServicingAssetAtFairValuePeriodIncreaseDecrease0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:DiscountRateTwo


Servicing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-31
Value0-31800000.0-3200000.0-2000000.0-800000.0-22900000.0-600000.0100000.0100000.0-22900000.01100000.0-23800000.0-25000000.0
Percentage of ServicingAssetAtFairValuePeriodIncreaseDecrease0.0195.1200.0181.8200.0195.7200.0100.0-33.3200.9100.0195.1182.5

us-gaap:ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate us-gaap:Range

us-gaap:ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate

srt:Maximum


Servicing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value013.5013.36500.1350000.135000.1350.135
Percentage of ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate0.0100.00.0100.00.0100.00.00.00.0100.00.00.0100.0100.0

srt:Minimum


Servicing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-06-30
Value06.106.03900.0610.031000.03000.030.03
Percentage of ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate0.045.20.045.20.045.20.00.00.022.20.00.022.222.2

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:ConsolidatedEntities, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

nmrk:BGCHoldingPartnershipUnits, us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.020.1-0.0210.54
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0100.0100.0

nmrk:NewmarkHoldingsLimitedPartnership, us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.655.27-0.2-0.670.118.54-0.7-1.93-2.2113.51
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue0.00.0-1000.0-670.0-550.081.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:ConsolidatedEntities, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

nmrk:BGCHoldingPartnershipUnits, us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-312020-09-302020-06-302020-03-31
Value003.690
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.00.0100.00.0

nmrk:NewmarkHoldingsLimitedPartnership, us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2.985.72-0.32-0.35-0.959.580.03-0.14
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.00.00.00.0-25.70.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:ConsolidatedEntities, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

nmrk:BGCHoldingPartnershipUnits, us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value03.690-0.40.0310.32
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.0100.00.0100.0100.0100.0

nmrk:NewmarkHoldingsLimitedPartnership, us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-0.358.040.39-0.1-0.58.5-1.83-0.36-0.0813.97
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.0217.90.025.0-1666.782.40.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod us-gaap:CapitalUnitsByClass

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod

nmrk:NonDistributionEarningUnits


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value0.81.31.51.31.4-3.43.57.6
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares


Sharebased
Period End2021-06-302021-03-312020-12-312020-09-30
Value800000.0600000.0900000.0900000.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares100.0100.0100.0100.0

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


Short
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value100000.0200000.0100000.0200000.0300000.0200000.0300000.0700000.0700000.0600000.0
Percentage of ShortTermLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesNewIssues us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:GeneralPartner, nmrk:CantorFitzgeraldCo


Stock
Period End2021-03-31
Value0.273088
Percentage of StockIssuedDuringPeriodSharesNewIssues100.0

us-gaap:LimitedPartner, nmrk:CantorFitzgeraldCo


Stock
Period End2021-03-31
Value0.735625
Percentage of StockIssuedDuringPeriodSharesNewIssues269.4

us-gaap:SubleaseIncome

us-gaap:SubleaseIncome


Sublease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value200000.0400000.01100000.0400000.0300000.0200000.0100000.0200000.0200000.0200000.0
Percentage of SubleaseIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TemporaryEquityNetIncome

us-gaap:TemporaryEquityNetIncome


Temporary
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value769000.0525000.001734000.06000.0003625000.0957000.0706000.0
Percentage of TemporaryEquityNetIncome100.0100.00.0100.0100.00.00.0100.0100.0100.0

us-gaap:TemporaryEquityStockIssuedDuringPeriodValueNewIssues

us-gaap:TemporaryEquityStockIssuedDuringPeriodValueNewIssues


Temporary
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1000.0124000.0003659000.0000
Percentage of TemporaryEquityStockIssuedDuringPeriodValueNewIssues100.0100.00.00.0100.00.00.00.0

us-gaap:TreasuryStockAcquiredAverageCostPerShare us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:TreasuryStockAcquiredAverageCostPerShare

srt:ExecutiveVicePresident


Treasury
Period End2021-04-27
Value10.67
Percentage of TreasuryStockAcquiredAverageCostPerShare100.0

us-gaap:TreasuryStockAcquiredAverageCostPerShare us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock

srt:BoardOfDirectorsChairman, us-gaap:CommonClassA


Treasury
Period End2021-04-27
Value10.67
Percentage of TreasuryStockAcquiredAverageCostPerShare100.0

us-gaap:TreasuryStockAcquiredAverageCostPerShare us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

srt:BoardOfDirectorsChairman, us-gaap:CommonClassA, us-gaap:SubsequentEvent


Treasury
Period End2021-04-27
Value10.67
Percentage of TreasuryStockAcquiredAverageCostPerShare100.0

us-gaap:TreasuryStockAcquiredAverageCostPerShare us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

srt:ExecutiveVicePresident, us-gaap:SubsequentEvent


Treasury
Period End2021-04-27
Value10.67
Percentage of TreasuryStockAcquiredAverageCostPerShare100.0

us-gaap:TreasuryStockAcquiredAverageCostPerShare us-gaap:StatementClassOfStock

us-gaap:CommonClassA


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value12.8110.577.3300012.978.818.6109.73
Percentage of TreasuryStockAcquiredAverageCostPerShare0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStockValueAcquiredParValueMethod

us-gaap:TreasuryStockValueAcquiredParValueMethod


Treasury
Period End2021-06-302021-03-312019-12-312019-09-302019-06-30
Value459.2838.1172013
Percentage of TreasuryStockValueAcquiredParValueMethod100.0100.0100.0100.0100.0

us-gaap:TreasuryStockValueAcquiredParValueMethod us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Treasury
Period End2021-06-302021-03-312019-09-30
Value6.21.5934.658
Percentage of TreasuryStockValueAcquiredParValueMethod13.517.223.2

us-gaap:TreasuryStockCommon


Treasury
Period End2021-06-302021-03-312019-12-312019-09-302019-06-30
Value397.690.4252013
Percentage of TreasuryStockValueAcquiredParValueMethod86.582.85.2100.0100.0

us-gaap:UnrealizedGainLossOnDerivatives

us-gaap:UnrealizedGainLossOnDerivatives


Unrealized
Period 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
Value-6.802-5.602-6.57-5.771-22.51221-13.936-8.214-15.638-13.329129.135
Percentage of UnrealizedGainLossOnDerivatives100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ValuationAllowanceForImpairmentOfRecognizedServicingAssetsPeriodIncreaseDecrease us-gaap:FairValueByAssetClass

us-gaap:ValuationAllowanceForImpairmentOfRecognizedServicingAssetsPeriodIncreaseDecrease

nmrk:MortgageServicingRights


Valuation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-4.687-11.248-1.137-1.850.66317-1.07.386.5981.7222.6130.366-4.0841.2960.5840.6580.9073.168
Percentage of ValuationAllowanceForImpairmentOfRecognizedServicingAssetsPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:EntityCommonStockSharesOutstanding us-gaap:StatementClassOfStock

dei:EntityCommonStockSharesOutstanding

us-gaap:CommonClassA


Entity
Period End2020-08-052020-05-072020-04-222020-02-262019-11-062019-08-072019-05-062019-03-132018-11-122018-08-102018-05-11
Value157156156156158156157156138138138
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB


Entity
Period End2020-08-052020-05-072020-04-222020-02-262019-11-062019-08-072019-05-062019-03-132018-11-122018-08-102018-05-11
Value2121212121212121151515
Percentage of EntityCommonStockSharesOutstanding13.513.613.613.613.413.613.513.611.411.411.4

nmrk:AccountsPayableAndAccruedExpensesCurrent

nmrk:AccountsPayableAndAccruedExpensesCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value16416297110124154189142131130113110978579
Percentage of AccountsPayableAndAccruedExpensesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:AccruedCompensationNoncurrent

nmrk:AccruedCompensationNoncurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value883133313092922842787335333532323231
Percentage of AccruedCompensationNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:AccruedPayrollTaxesNoncurrent

nmrk:AccruedPayrollTaxesNoncurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value1056361626259411550503148
Percentage of AccruedPayrollTaxesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:AnnualizedNetProfitAllocation

nmrk:AnnualizedNetProfitAllocation


Annualized
Period End2020-12-31
Value2.75
Percentage of AnnualizedNetProfitAllocation100.0

nmrk:BusinessCombinationContingentConsiderationLiabilityAtCost us-gaap:FairValueByFairValueHierarchyLevel

nmrk:BusinessCombinationContingentConsiderationLiabilityAtCost

us-gaap:FairValueInputsLevel3


Business
Period End2021-06-302020-12-31
Value3551
Percentage of BusinessCombinationContingentConsiderationLiabilityAtCost100.0100.0

nmrk:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets us-gaap:BusinessAcquisition

nmrk:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets

nmrk:Knotel


Business
Period End2021-01-31
Value44
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets100.0

nmrk:PriorPeriodAcquisitions


Business
Period End2020-12-31
Value0.029
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets0.0

nmrk:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAsset us-gaap:BusinessAcquisition

nmrk:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAsset

nmrk:Knotel


Business
Period End2021-01-31
Value239
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAsset100.0

nmrk:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseLiablities us-gaap:BusinessAcquisition

nmrk:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseLiablities

nmrk:Knotel


Business
Period End2021-01-31
Value236
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseLiablities100.0

nmrk:ContingentConsiderationFairValue

nmrk:ContingentConsiderationFairValue


Contingent
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value181931313345
Percentage of ContingentConsiderationFairValue100.0100.0100.0100.0100.0100.0

nmrk:ContingentConsiderationFairValue us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel3


Contingent
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value181931313345
Percentage of ContingentConsiderationFairValue100.0100.0100.0100.0100.0100.0

nmrk:DeferredTaxAssetsNetOperatingLossAndCreditCarryforwards

nmrk:DeferredTaxAssetsNetOperatingLossAndCreditCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value2447000.04216000.01297000.0378000.0
Percentage of DeferredTaxAssetsNetOperatingLossAndCreditCarryforwards100.0100.0100.0100.0

nmrk:DeferredTaxAssetsOtherDeferredAndAccruedExpenses

nmrk:DeferredTaxAssetsOtherDeferredAndAccruedExpenses


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value4584000.07655000.09600000.04475000.0
Percentage of DeferredTaxAssetsOtherDeferredAndAccruedExpenses100.0100.0100.0100.0

nmrk:ExchangeablePartnershipUnits dei:LegalEntity, us-gaap:StatementClassOfStock

nmrk:ExchangeablePartnershipUnits

nmrk:Cantor, us-gaap:CommonClassB


Exchangeable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value2323222222
Percentage of ExchangeablePartnershipUnits100.0100.0100.0100.0100.0

nmrk:FinancialGuaranteeLiability.CreditRiskServiceLoans

nmrk:FinancialGuaranteeLiability.CreditRiskServiceLoans


Financial
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value24800246002400022700215002090020200
Percentage of FinancialGuaranteeLiability.CreditRiskServiceLoans100.0100.0100.0100.0100.0100.0100.0

nmrk:FinancialGuaranteeLiability.CreditRiskServiceLoans us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinancingReceivables60To89DaysPastDue


Financial
Period End2021-06-302021-03-312020-12-312020-09-30
Value33225353
Percentage of FinancialGuaranteeLiability.CreditRiskServiceLoans0.10.10.20.2

nmrk:FinancialGuaranteeLiabilityMaximumPotentialLoss

nmrk:FinancialGuaranteeLiabilityMaximumPotentialLoss


Financial
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value740074007200630061005800
Percentage of FinancialGuaranteeLiabilityMaximumPotentialLoss100.0100.0100.0100.0100.0100.0

nmrk:FinancialGuaranteeLiabilityMaximumPotentialLoss us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinancingReceivables60To89DaysPastDue


Financial
Period End2021-06-302021-03-312020-12-312020-09-30
Value117.61717
Percentage of FinancialGuaranteeLiabilityMaximumPotentialLoss0.20.10.20.0

nmrk:FinancialGuaranteeLiabilityMaximumPotentialLossCoveredByCreditEnhancementAgreement

nmrk:FinancialGuaranteeLiabilityMaximumPotentialLossCoveredByCreditEnhancementAgreement


Financial
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value6200000.09600000.09700000.09700000.09800000.0
Percentage of FinancialGuaranteeLiabilityMaximumPotentialLossCoveredByCreditEnhancementAgreement100.0100.0100.0100.0100.0

nmrk:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour

nmrk:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour


Finite
Period End2021-06-302021-03-31
Value1214
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour100.0100.0

nmrk:FiniteLivedIntangibleAssetsExpectedAmortizationExpense

nmrk:FiniteLivedIntangibleAssetsExpectedAmortizationExpense


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value40442729
Percentage of FiniteLivedIntangibleAssetsExpectedAmortizationExpense100.0100.0100.0100.0

nmrk:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour

nmrk:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour


Lessee
Period End2021-06-302021-03-31
Value218223
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour100.0100.0

nmrk:LiquidationValueOfLoansOutstanding us-gaap:FinancingReceivablesPeriodPastDue

nmrk:LiquidationValueOfLoansOutstanding

us-gaap:FinancingReceivables60To89DaysPastDue


Liquidation
Period End2021-06-302021-03-312020-12-312020-09-30
Value30183941
Percentage of LiquidationValueOfLoansOutstanding100.0100.0100.0100.0

nmrk:NonMarketableInvestments

nmrk:NonMarketableInvestments


Non
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value26249.927676777941025753
Percentage of NonMarketableInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:NotionalValueOfLimitedPartnershipUnitsEligibleForConversion us-gaap:PartnerTypeOfPartnersCapitalAccount

nmrk:NotionalValueOfLimitedPartnershipUnitsEligibleForConversion

nmrk:LimitedPartnershipUnits


Notional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value26220921820619319319437
Percentage of NotionalValueOfLimitedPartnershipUnitsEligibleForConversion100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:NotionalValueOfLimitedPartnershipUnitsWithPostTerminationPayOutAmount us-gaap:ConsolidatedEntities

nmrk:NotionalValueOfLimitedPartnershipUnitsWithPostTerminationPayOutAmount

nmrk:BGCHoldingPartnershipUnits


Notional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value92255257257253240261223
Percentage of NotionalValueOfLimitedPartnershipUnitsWithPostTerminationPayOutAmount100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:OutsideBrokerPayableCurrent

nmrk:OutsideBrokerPayableCurrent


Outside
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value484353545660746563595949434123
Percentage of OutsideBrokerPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:OutstandingBorrowerAdvancesToInvestors us-gaap:BalanceSheetLocation

nmrk:OutstandingBorrowerAdvancesToInvestors

us-gaap:OtherAssets


Outstanding
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value800000.0800000.0800000.01300000.01000000.0200000.0300000.0200000.0400000.0200000.0100000.0100000.0
Percentage of OutstandingBorrowerAdvancesToInvestors100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:PreferredStockConvertibleConversionRatio us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:PreferredStockConvertibleConversionRatio

srt:ChiefExecutiveOfficer


Preferred
Period End2021-03-16
Value0.9365
Percentage of PreferredStockConvertibleConversionRatio100.0

nmrk:PreferredStockConvertibleConversionRatio us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock

srt:ChiefFinancialOfficer, us-gaap:CommonClassA


Preferred
Period End2021-03-16
Value0.9365
Percentage of PreferredStockConvertibleConversionRatio100.0

nmrk:PrimaryServicingPortfolio

nmrk:PrimaryServicingPortfolio


Primary
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value668006790066300645996280061100599005920058100573005710056100556005510054200
Percentage of PrimaryServicingPortfolio100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:QuarterlyNetProfitAllocation

nmrk:QuarterlyNetProfitAllocation


Quarterly
Period End2020-12-31
Value0.6875
Percentage of QuarterlyNetProfitAllocation100.0

nmrk:RedeemablePreferredUnitsCurrent

nmrk:RedeemablePreferredUnitsCurrent


Redeemable
Period End2021-06-302020-09-30
Value16693
Percentage of RedeemablePreferredUnitsCurrent100.0100.0

nmrk:SecuritiesLoanedFairValue us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:SecuritiesLoanedFairValue

nmrk:CantorFitzgeraldCo


Securities
Period End2020-12-312019-12-31
Value3236
Percentage of SecuritiesLoanedFairValue100.0100.0

nmrk:SettlementSharePrice us-gaap:PlanName

nmrk:SettlementSharePrice

nmrk:A2021EquityEvent


Settlement
Period End2021-06-30
Value12.5
Percentage of SettlementSharePrice100.0

nmrk:SettlementSharePrice us-gaap:PlanName, us-gaap:SubsequentEventType

nmrk:A2021EquityEvent, us-gaap:SubsequentEvent


Settlement
Period End2021-07-01
Value13.01
Percentage of SettlementSharePrice0.0

nmrk:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedFairValue us-gaap:ConsolidatedEntities, us-gaap:AwardType

nmrk:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedFairValue

nmrk:BGCHoldingPartnershipUnits, us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302020-12-312019-12-31
Value0.0210.0310.467
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedFairValue100.0100.0100.0

nmrk:NewmarkHoldingsLimitedPartnership, us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302020-12-312019-12-31
Value888235
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedFairValue419085.7266109.77571.9

nmrk:ShareRepurchaseAndRedemptionUnitRemainingAuthorizedAmount us-gaap:StatementClassOfStock

nmrk:ShareRepurchaseAndRedemptionUnitRemainingAuthorizedAmount

us-gaap:CommonClassA


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value3423901501571571571571650.186104199
Percentage of ShareRepurchaseAndRedemptionUnitRemainingAuthorizedAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsNonvestedFairValue us-gaap:ConsolidatedEntities, us-gaap:AwardType

nmrk:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsNonvestedFairValue

nmrk:BGCHoldingPartnershipUnits, us-gaap:RestrictedStockUnitsRSU


Sharebased
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-31
Value0.0210.0310.0310.0640.0880.4671.6193.2842.16
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsNonvestedFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:NewmarkHoldingsLimitedPartnership, us-gaap:RestrictedStockUnitsRSU


Sharebased
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-31
Value7682828347352.9730.0
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsNonvestedFairValue362923.8266109.7267545.2130370.354258.07571.9183.60.0

nmrk:SpecialServicingPortfolio

nmrk:SpecialServicingPortfolio


Special
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value220022002300230024002400240021002700270029003200340036003800
Percentage of SpecialServicingPortfolio100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsAndOtherReceivablesNetCurrent

us-gaap:AccountsAndOtherReceivablesNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value407394376380402439508478466445451390317293210
Percentage of AccountsAndOtherReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableAndOtherAccruedLiabilitiesCurrent

us-gaap:AccountsPayableAndOtherAccruedLiabilitiesCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value715373326465341399417473330302312248184165124
Percentage of AccountsPayableAndOtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableAndOtherAccruedLiabilitiesCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Accounts
Period End2020-12-312019-12-31
Value3074
Percentage of AccountsPayableAndOtherAccruedLiabilitiesCurrent9.417.9

us-gaap:AccountsPayableCurrentAndNoncurrent us-gaap:ConsolidatedEntities

us-gaap:AccountsPayableCurrentAndNoncurrent

srt:ParentCompany


Accounts
Period End2020-12-312019-12-31
Value3185000.02495000.0
Percentage of AccountsPayableCurrentAndNoncurrent100.0100.0

us-gaap:AccountsPayableRelatedPartiesCurrent us-gaap:ConsolidatedEntities

us-gaap:AccountsPayableRelatedPartiesCurrent

srt:ParentCompany


Accounts
Period End2020-12-312019-12-312018-12-312017-12-31
Value3.9349561.155
Percentage of AccountsPayableRelatedPartiesCurrent100.0100.0100.0100.0

us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent

us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value0.5486.0454.3925.1853.88143813
Percentage of AccountsPayableRelatedPartiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:CantorCommercialRealEstateCompany


Accounts
Period End2020-07-312020-06-302020-03-312019-12-312018-05-31
Value3.33.33.22.62.6
Percentage of AccountsPayableRelatedPartiesCurrentAndNoncurrent0.085.121.96.80.0

us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:SubsequentEventType

nmrk:CantorCommercialRealEstateCompany, us-gaap:SubsequentEvent


Accounts
Period End2020-07-31
Value3.3
Percentage of AccountsPayableRelatedPartiesCurrentAndNoncurrent0.0

us-gaap:AccountsReceivableRelatedParties

us-gaap:AccountsReceivableRelatedParties


Accounts
Period End2020-09-302020-06-302019-12-312019-06-302018-12-31
Value0.6521.6060.01.23720
Percentage of AccountsReceivableRelatedParties100.0100.00.0100.0100.0

us-gaap:AccruedPayrollTaxesCurrent

us-gaap:AccruedPayrollTaxesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1986760534647455648413920242012
Percentage of AccruedPayrollTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent us-gaap:BalanceSheetLocation

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AccountsReceivable


Allowance
Period End2021-06-302021-03-312020-12-312019-12-31
Value15131311
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0

us-gaap:AlternativeInvestment us-gaap:BalanceSheetLocation

us-gaap:AlternativeInvestment

us-gaap:OtherNoncurrentAssets


Alternative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value26249.967677794102575353
Percentage of AlternativeInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AlternativeInvestment us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsNonrecurring


Alternative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value26249.96767779453
Percentage of AlternativeInvestment100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure

us-gaap:AssetsFairValueDisclosure


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value153585011741733116684632589692699711321318607992426
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value10934.001331210.00.036123334348939.1278.62257
Percentage of AssetsFairValueDisclosure71.30.52.87.00.00.011.313.83.64.44.37.11.50.913.5

us-gaap:FairValueInputsLevel2


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4158211099153710897392157048188739901197567965362
Percentage of AssetsFairValueDisclosure27.196.593.688.793.487.466.278.688.487.587.590.993.497.384.9

us-gaap:FairValueInputsLevel3


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value252541747710672687380922630186.676
Percentage of AssetsFairValueDisclosure1.73.03.54.36.612.622.47.77.98.18.22.05.11.91.6

us-gaap:BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned

nmrk:PriorPeriodAcquisitions


Business
Period End2020-12-31
Value1300000.0
Percentage of BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned100.0

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount

nmrk:Knotel


Business
Period End2021-06-302021-03-31
Value2822
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount100.0100.0

nmrk:PriorPeriodAcquisitions


Business
Period End2020-12-31
Value2.4
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount0.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh

us-gaap:FairValueInputsLevel3


Business
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value39516063596639
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationLiability us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:BusinessCombinationContingentConsiderationLiability

us-gaap:FairValueInputsLevel3


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value1819313133334532
Percentage of BusinessCombinationContingentConsiderationLiability100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationLiability us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique

us-gaap:FairValueInputsLevel3, us-gaap:ValuationTechniqueDiscountedCashFlow


Business
Period End2021-06-302020-12-31
Value1831
Percentage of BusinessCombinationContingentConsiderationLiability100.1100.1

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value8.5555.611161819151310113.164.4527.794.7427.1166.504
Percentage of BusinessCombinationContingentConsiderationLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType

us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, nmrk:NasdaqForwards, us-gaap:MeasurementInputPriceVolatility


Business
Period End2020-12-312019-12-312018-12-31
Value42.50.3220.302
Percentage of BusinessCombinationContingentConsiderationLiabilityMeasurementInput100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:MeasurementInputType

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, nmrk:MeasurementInputExpectedEarnoutAndContingenciesRate


Business
Period End2020-12-312019-12-312018-12-31
Value93.90.9810.996
Percentage of BusinessCombinationContingentConsiderationLiabilityMeasurementInput220.9304.7329.8

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, us-gaap:MeasurementInputDiscountRate


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value9.69.57.17.30.0770.0750.0860.082
Percentage of BusinessCombinationContingentConsiderationLiabilityMeasurementInput0.00.016.70.00.00.026.727.2

us-gaap:BusinessCombinationContingentConsiderationLiabilityMeasurementInput us-gaap:Range, us-gaap:MeasurementInputType

srt:WeightedAverage, nmrk:MeasurementInputExpectedEarnoutAndContingenciesRate


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value73.091.393.998.50.9850.9210.981
Percentage of BusinessCombinationContingentConsiderationLiabilityMeasurementInput0.00.0220.90.00.00.0304.7

us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent

us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value101314131317322927242823161517
Percentage of BusinessCombinationContingentConsiderationLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationLiabilityNoncurrent us-gaap:BusinessAcquisition

nmrk:AcquisitionsFromTwoThousandFourteenThroughTwoThousandEighteen


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-03-312018-12-31
Value181918182020291616
Percentage of BusinessCombinationContingentConsiderationLiabilityNoncurrent181.6138.0129.5136.2145.3114.991.467.659.8

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents

nmrk:Knotel


Business
Period End2021-01-31
Value7355000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables

nmrk:Knotel


Business
Period End2021-01-31
Value3.305
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables100.0

nmrk:PriorPeriodAcquisitions


Business
Period End2020-12-31
Value0.796
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities

nmrk:Knotel


Business
Period End2021-01-31
Value64
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities100.0

nmrk:PriorPeriodAcquisitions


Business
Period End2020-12-31
Value0.114
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill

nmrk:Knotel


Business
Period End2021-01-31
Value18
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill100.0

nmrk:PriorPeriodAcquisitions


Business
Period End2020-12-31
Value2.7
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment

nmrk:Knotel


Business
Period End2021-01-31
Value20
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment100.0

nmrk:PriorPeriodAcquisitions


Business
Period End2020-12-31
Value0.134
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

nmrk:Knotel


Business
Period End2021-01-31
Value66
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet100.0

nmrk:PriorPeriodAcquisitions


Business
Period End2020-12-31
Value9.839
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet0.0

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiability


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-03-312018-12-312018-01-01
Value2200000.02400000.02900000.01900000.02300000.04000000.04200000.03800000.04200000.04600000.0
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligation

us-gaap:ContractualObligation


Contractual
Period End2020-12-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2184129620654441000437244
Percentage of ContractualObligation100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligation us-gaap:DebtInstrument

nmrk:InterestOnLongTermDebt


Contractual
Period End2020-12-312019-12-312018-12-31
Value102134168
Percentage of ContractualObligation4.710.38.2

nmrk:InterestOnWarehouseLinesOfCredit


Contractual
Period End2020-12-312019-12-312018-12-31
Value1.0625.40423
Percentage of ContractualObligation0.00.41.1

us-gaap:ContractualObligation us-gaap:FinancialInstrument

us-gaap:LongTermDebt


Contractual
Period End2020-12-312019-12-312018-12-31
Value690600550
Percentage of ContractualObligation31.646.326.6

us-gaap:ContractualObligation us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ConstructionLoans


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value7004004005005006001500627694657294244
Percentage of ContractualObligation0.00.018.30.00.00.0115.70.00.00.014.2100.0

us-gaap:ContractualObligation us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

nmrk:OperatingLeases


Contractual
Period End2020-12-312019-12-312018-12-31
Value329347351
Percentage of ContractualObligation15.126.817.0

nmrk:WarehouseFacilities


Contractual
Period End2020-12-312019-12-31
Value1061209
Percentage of ContractualObligation48.616.2

us-gaap:ContractualObligationDueAfterFifthYear

us-gaap:ContractualObligationDueAfterFifthYear


Contractual
Period End2020-12-312019-12-312018-12-31
Value126146158
Percentage of ContractualObligationDueAfterFifthYear100.0100.0100.0

us-gaap:ContractualObligationDueAfterFifthYear us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

nmrk:OperatingLeases


Contractual
Period End2020-12-312019-12-312018-12-31
Value126146158
Percentage of ContractualObligationDueAfterFifthYear100.0100.0100.0

us-gaap:ContractualObligationDueInFourthAndFifthYear

us-gaap:ContractualObligationDueInFourthAndFifthYear


Contractual
Period End2020-12-312019-12-312018-12-31
Value74653687
Percentage of ContractualObligationDueInFourthAndFifthYear100.0100.0100.0

us-gaap:ContractualObligationDueInFourthAndFifthYear us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

nmrk:OperatingLeases


Contractual
Period End2020-12-312019-12-312018-12-31
Value747370
Percentage of ContractualObligationDueInFourthAndFifthYear100.011.310.2

us-gaap:ContractualObligationDueInNextTwelveMonths

us-gaap:ContractualObligationDueInNextTwelveMonths


Contractual
Period End2020-12-312019-12-312018-12-31
Value11442951072
Percentage of ContractualObligationDueInNextTwelveMonths100.0100.0100.0

us-gaap:ContractualObligationDueInNextTwelveMonths us-gaap:DebtInstrument

nmrk:InterestOnLongTermDebt


Contractual
Period End2020-12-312019-12-312018-12-31
Value363533
Percentage of ContractualObligationDueInNextTwelveMonths3.212.03.1

nmrk:InterestOnWarehouseLinesOfCredit


Contractual
Period End2020-12-312019-12-312018-12-31
Value1.0625.40423
Percentage of ContractualObligationDueInNextTwelveMonths0.11.82.2

us-gaap:ContractualObligationDueInNextTwelveMonths us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

nmrk:OperatingLeases


Contractual
Period End2020-12-312019-12-312018-12-31
Value454442
Percentage of ContractualObligationDueInNextTwelveMonths4.015.14.0

nmrk:WarehouseFacilities


Contractual
Period End2020-12-312019-12-31
Value1061209
Percentage of ContractualObligationDueInNextTwelveMonths92.771.0

us-gaap:ContractualObligationDueInSecondAndThirdYear

us-gaap:ContractualObligationDueInSecondAndThirdYear


Contractual
Period End2020-12-312019-12-312018-12-31
Value838201147
Percentage of ContractualObligationDueInSecondAndThirdYear100.0100.0100.0

us-gaap:ContractualObligationDueInSecondAndThirdYear us-gaap:DebtInstrument

nmrk:InterestOnLongTermDebt


Contractual
Period End2020-12-312019-12-312018-12-31
Value666967
Percentage of ContractualObligationDueInSecondAndThirdYear7.934.345.8

us-gaap:ContractualObligationDueInSecondAndThirdYear us-gaap:FinancialInstrument

us-gaap:LongTermDebt


Contractual
Period End2020-12-312019-12-31
Value69050
Percentage of ContractualObligationDueInSecondAndThirdYear82.324.8

us-gaap:ContractualObligationDueInSecondAndThirdYear us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

nmrk:OperatingLeases


Contractual
Period End2020-12-312019-12-312018-12-31
Value828279
Percentage of ContractualObligationDueInSecondAndThirdYear9.840.954.2

us-gaap:DebtInstrumentCarryingAmount us-gaap:ConsolidatedEntities, us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentCarryingAmount

srt:ParentCompany, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Debt
Period End2020-12-312019-12-31
Value14050
Percentage of DebtInstrumentCarryingAmount100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value14014014034041541550
Percentage of DebtInstrumentCarryingAmount0.00.0100.00.00.00.0100.0

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscount

srt:ParentCompany, nmrk:SixPointOneTwoFivePercentSeniorNotes, us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-312018-12-31
Value3540000.04700000.05800000.0
Percentage of DebtInstrumentUnamortizedDiscount100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

nmrk:SixPointOneTwoFivePercentSeniorNotes, us-gaap:SeniorNotes


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value2958000.03251000.03540000.03825000.04105000.04380000.04700000.05800000.0
Percentage of DebtInstrumentUnamortizedDiscount0.00.0100.00.00.00.0100.0100.0

us-gaap:DebtSecurities

us-gaap:DebtSecurities


Debt
Period End2020-12-31
Value12
Percentage of DebtSecurities100.0

us-gaap:DebtSecurities us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2


Debt
Period End2020-12-31
Value12
Percentage of DebtSecurities100.0

us-gaap:DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent

us-gaap:DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1300000.01200000.01100000.0900000.01500000.01300000.01100000.0900000.01500000.01200000.01000000.0600000.0400000.0
Percentage of DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet us-gaap:ConsolidatedEntities, us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:DeferredFinanceCostsNet

srt:ParentCompany, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Deferred
Period End2020-12-312019-12-31
Value2387000.01100000.0
Percentage of DeferredFinanceCostsNet100.0100.0

us-gaap:DeferredFinanceCostsNet us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

srt:ParentCompany, nmrk:SixPointOneTwoFivePercentSeniorNotes, us-gaap:SeniorNotes


Deferred
Period End2020-12-312019-12-312018-12-31
Value3688000.05000000.06600000.0
Percentage of DeferredFinanceCostsNet154.5454.50.0

us-gaap:DeferredFinanceCostsNet us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1836000.02112000.02387000.02662000.02937000.03213000.01100000.0
Percentage of DeferredFinanceCostsNet0.00.0100.00.00.00.0100.0

us-gaap:DeferredFinanceCostsNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

nmrk:SixPointOneTwoFivePercentSeniorNotes, us-gaap:SeniorNotes


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value3046000.03367000.03688000.04009000.04330000.04651000.05000000.06600000.0
Percentage of DeferredFinanceCostsNet0.00.0154.50.00.00.0454.50.0

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxAssetsNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value99187187190190189182149
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value50333017
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0

us-gaap:DeferredRentCreditNoncurrent

us-gaap:DeferredRentCreditNoncurrent


Deferred
Period End2021-06-302021-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value19154947414141
Percentage of DeferredRentCreditNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value240220181186
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsInvestments

us-gaap:DeferredTaxAssetsInvestments


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value65545577
Percentage of DeferredTaxAssetsInvestments100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value167153114104
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-31
Value5030
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0

us-gaap:DepositAssets

us-gaap:DepositAssets


Deposit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value109.4491.5391.5071.6231.4591.7031.5871.5541.3121.1921.0571.2791.479
Percentage of DepositAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DerivativeAssetMeasurementInput

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, nmrk:NasdaqForwards, us-gaap:MeasurementInputPriceVolatility


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value42.942.541.90.4130.3980.322
Percentage of DerivativeAssetMeasurementInput100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:DerivativeAssets

us-gaap:FairValueInputsLevel3, nmrk:ForwardSaleContracts


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value4.0269.2397.6329.6252.32514
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel3, nmrk:NasdaqForwards


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value7.2212182426
Percentage of DerivativeAssets78.1168.0197.01063.7184.2

us-gaap:FairValueInputsLevel3, us-gaap:InterestRateLockCommitments


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value219.04821455032
Percentage of DerivativeAssets530.997.9275.6473.42157.8222.6

us-gaap:DerivativeAssets us-gaap:FinancialInstrument

nmrk:ForwardSaleContracts


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value4.0269.2397.6329.6252.32514
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0

nmrk:NasdaqForwards


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value7.2212182426
Percentage of DerivativeAssets78.1168.0197.01063.7184.2

us-gaap:InterestRateLockCommitments


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value219.04821455032
Percentage of DerivativeAssets530.997.9275.6473.42157.8222.6

us-gaap:DerivativeAssetsCurrent

us-gaap:DerivativeAssetsCurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value25193255546951303028302630186.676
Percentage of DerivativeAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetsCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Derivative
Period End2020-12-312019-12-31
Value184179
Percentage of DerivativeAssetsCurrent572.6351.8

us-gaap:DerivativeAssetsNoncurrent

us-gaap:DerivativeAssetsNoncurrent


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value5.9789.2291822362138425261
Percentage of DerivativeAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value252541747710672687380929149186.676
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue us-gaap:DerivativeInstrumentRisk

nmrk:NasdaqForwards


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value7.22121824472677
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue28.330.925.632.044.736.383.9

us-gaap:ForwardContracts


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value4.0269.2397.6329.6252.3250.229148.177
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue15.936.218.413.03.00.219.78.8

us-gaap:InterestRateLockCommitments


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value219.04821455058326.732
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue84.135.550.761.465.055.143.97.3

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel3, nmrk:ForwardSaleContracts


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value4.0269.2397.6329.6252.3250.229141.5672.8455.9648.1773.753
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue15.936.218.413.03.00.219.72.33.97.48.856.2

us-gaap:FairValueInputsLevel3, nmrk:NasdaqForwards


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value7.22121824472677
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue28.330.925.632.044.736.383.9

us-gaap:FairValueInputsLevel3, us-gaap:InterestRateLockCommitments


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value219.04821455058322621106.7322.923
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue84.135.550.761.465.055.143.938.929.912.77.343.8

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value15111742517725272914161214113.047
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue us-gaap:DerivativeInstrumentRisk

us-gaap:ForwardContracts


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value116.48214415077139.208
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue75.354.283.497.497.8100.052.855.2

us-gaap:InterestRateLockCommitments


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value3.7075.4712.9771.1331.1140.0127.47
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue24.745.816.62.62.20.047.244.8

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel3, nmrk:ForwardSaleContracts


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value116.482144150771325279.5969.2080.657
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue75.354.283.497.497.8100.052.895.691.864.955.221.6

us-gaap:FairValueInputsLevel3, us-gaap:InterestRateLockCommitments


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value3.7075.4712.9771.1331.1140.0121.1982.4285.197.472.39
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue24.745.816.62.62.20.047.24.48.235.144.878.4

us-gaap:DerivativeLiabilities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:DerivativeLiabilities

us-gaap:FairValueInputsLevel3, nmrk:ForwardSaleContracts


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value116.48214415013
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:InterestRateLockCommitments


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value3.7075.4712.9771.1331.11412
Percentage of DerivativeLiabilities32.784.419.92.72.289.6

us-gaap:DerivativeLiabilities us-gaap:FinancialInstrument

nmrk:ForwardSaleContracts


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value116.48214415013
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateLockCommitments


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value3.7075.4712.9771.1331.11412
Percentage of DerivativeLiabilities32.784.419.92.72.289.6

us-gaap:DerivativeLiabilitiesCurrent

us-gaap:DerivativeLiabilitiesCurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value15111742517725272914161214113.047
Percentage of DerivativeLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DueFromEmployeesNoncurrent

us-gaap:DueFromEmployeesNoncurrent


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value451444454479483403356320312285275248226209
Percentage of DueFromEmployeesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DueFromEmployeesNoncurrent us-gaap:RelatedPartyTransaction

nmrk:EmployeeLoans


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value451444454479483490403285
Percentage of DueFromEmployeesNoncurrent100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value568272279270246257343405339288366314228205205
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value8778787980463224172.22.5
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestments

us-gaap:EquityMethodInvestments


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value8889888895999999106101101103103104101
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestments us-gaap:BalanceSheetLocation

us-gaap:OtherNoncurrentAssets


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value8889888895100100100106101101101
Percentage of EquityMethodInvestments100.099.9100.0100.0100.1100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiCost us-gaap:FinancialInstrument

us-gaap:EquitySecuritiesFvNiCost

us-gaap:CommonStock


Equity
Period End2021-03-312020-12-312020-09-302019-12-31
Value4.03312136
Percentage of EquitySecuritiesFvNiCost100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiCost us-gaap:FinancialInstrument, us-gaap:SubsequentEventType, us-gaap:SubsidiarySaleOfStock

us-gaap:CommonStock, us-gaap:SubsequentEvent, nmrk:NasdaqEarnOut


Equity
Period End2021-07-02
Value166
Percentage of EquitySecuritiesFvNiCost0.0

us-gaap:EquitySecuritiesFvNiCost us-gaap:FinancialInstrument, us-gaap:SubsidiarySaleOfStock

us-gaap:CommonStock, nmrk:NasdaqEarnOut


Equity
Period End2020-11-30
Value121
Percentage of EquitySecuritiesFvNiCost0.0

us-gaap:EquitySecuritiesFvNiCost us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancialInstrument

nmrk:Nasdaq, us-gaap:CommonStock


Equity
Period End2021-06-302021-06-252020-12-31
Value1093109333
Percentage of EquitySecuritiesFvNiCost0.00.0100.0

us-gaap:EscrowDeposit

us-gaap:EscrowDeposit


Escrow
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value110012001300130093169492514001000100013001200800800800
Percentage of EscrowDeposit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ExcessCapital us-gaap:TypeOfArrangement

us-gaap:ExcessCapital

nmrk:SellerServicerAgreements


Excess
Period End2021-06-302021-03-312020-12-312020-09-30
Value355371357336
Percentage of ExcessCapital100.0100.0100.0100.0

us-gaap:FairValueConcentrationOfRiskLoansReceivable

us-gaap:FairValueConcentrationOfRiskLoansReceivable


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value24770245992404822658214662085320209
Percentage of FairValueConcentrationOfRiskLoansReceivable100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueConcentrationOfRiskLoansReceivable us-gaap:CounterpartyName, us-gaap:ManagingRisksInherentInServicingAssetsAndServicingLiabilitiesByTypeOfRisk

nmrk:DBCayman, us-gaap:CreditRisk


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value740773517172669863156124292929382307004200
Percentage of FairValueConcentrationOfRiskLoansReceivable29.929.929.829.629.429.40.10.00.00.00.00.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value2525417477106726873809211049186.67619
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap:FinancialInstrument

nmrk:ForwardSaleContracts


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value4.0269.2397.6329.6252.3250.229141.5672.8455.9648.17720169.6873.7532.1
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue15.936.218.413.03.00.219.72.33.97.48.818.532.952.556.210.5

nmrk:NasdaqForwards


Fair
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-31
Value7.221218244726770.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue28.330.925.632.044.736.383.90.0

us-gaap:InterestRateLockCommitments


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value219.04821455058322621106.7326.219148.752.92317
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue84.135.550.761.465.055.143.938.929.912.77.35.628.947.543.889.5

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value333149748511170676846494336342648
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue us-gaap:FinancialInstrument

nmrk:ContingentConsiderationLiability


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-31
Value181931313333453223
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue55.462.063.742.439.430.063.866.188.6

nmrk:ForwardSaleContracts


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value116.482144150771325279.5969.2080.0370.6412.4210.657
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue33.620.630.356.159.370.019.138.639.920.818.70.11.87.02.5

us-gaap:InterestRateLockCommitments


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value3.7075.4712.9771.1331.1140.0121.1982.4285.197.4712138.982.399.67
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue11.017.46.01.51.30.017.11.83.511.215.227.638.626.08.920.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value28252324252322201716151312119.934
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

nmrk:BelowMarketLeases


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value0.2080.1870.180.1580.1360.045
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization0.90.80.70.70.60.3

us-gaap:CustomerContracts


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2.1911.6861.5841.4821.381.2791.1771.0860.9730.9110.8490.7870.7250.6640.602
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization7.76.56.86.05.45.45.35.35.55.55.65.75.75.86.1

us-gaap:CustomerRelatedIntangibleAssets


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value11109.7298.8257.8846.9776.1095.4024.8984.3953.893.382.8872.4071.495
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization40.640.941.935.730.929.327.526.127.426.625.524.422.721.015.0

us-gaap:LicensingAgreements


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4.7524.514.2664.0223.7793.5353.2882.9582.7922.542.2922.0451.7971.5481.298
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization16.717.318.416.314.814.814.814.315.615.415.014.714.113.513.1

us-gaap:NoncompeteAgreements


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.413.1652.923.0952.9212.6742.4342.1931.9491.7091.4691.230.9930.6420.496
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization12.012.212.612.511.411.211.010.610.910.39.68.97.85.65.0

us-gaap:OtherIntangibleAssets


Finite
Period End2021-06-302021-03-312020-12-31
Value1.4831.3170.208
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization5.25.10.9

us-gaap:TrademarksAndTradeNames


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value5.0474.6874.5197.0969.3799.219.078.9237.1416.9146.7066.436.3066.1836.03
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization17.818.019.528.736.738.640.843.240.041.844.046.449.654.060.7

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-312020-09-30
Value9.85412
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2021-06-302021-03-312020-12-31
Value6741000.06769000.05700000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear


Finite
Period End2021-06-302021-03-312020-09-30
Value3915000.06358000.01689000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-312020-09-30
Value2287000.02793000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value4787000.04820000.02747000.03348000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value5828000.05855000.03301000.03706000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value6382000.06409000.03660000.05746000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross

nmrk:BelowMarketLeases


Finite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value0.350.9260.9410.9410.9410.941
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0

us-gaap:CustomerContracts


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value13153.0523.0523.0523.0523.0522.4832.4831.4521.4521.4521.4521.4521.452
Percentage of FiniteLivedIntangibleAssetsGross0.00.0872.0329.6324.3324.3324.30.00.00.0154.30.00.00.00.0

us-gaap:CustomerRelatedIntangibleAssets


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value30303030303024111111111210107.95
Percentage of FiniteLivedIntangibleAssetsGross0.00.08608.93253.93202.03233.92578.30.00.00.01203.30.00.00.00.0

us-gaap:NoncompeteAgreements


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value6.5576.5576.5576.9827.0676.9076.9536.4746.2676.2676.2676.8375.2383.6083.606
Percentage of FiniteLivedIntangibleAssetsGross0.00.01873.4754.0751.0734.0738.90.00.00.0666.00.00.00.00.0

us-gaap:OtherIntangibleAssets


Finite
Period End2021-06-302021-03-312020-12-31
Value4.5525.3020.35
Percentage of FiniteLivedIntangibleAssetsGross0.00.0100.0

us-gaap:TrademarksAndTradeNames


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value8.8048.7745.7048.44910101010109.3169.3168.1617.0617.0617.061
Percentage of FiniteLivedIntangibleAssetsGross0.00.01629.7912.41159.71154.21117.00.00.00.0990.00.00.00.00.0

us-gaap:GuaranteeObligationsMaximumExposure us-gaap:ManagingRisksInherentInServicingAssetsAndServicingLiabilitiesByTypeOfRisk

us-gaap:GuaranteeObligationsMaximumExposure

us-gaap:CreditRisk


Guarantee
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value18282829580057005700560058005300
Percentage of GuaranteeObligationsMaximumExposure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GuarantyLiabilities

us-gaap:GuarantyLiabilities


Guaranty
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value2327293232320.0150.0450.0730.0730.0320.0510.0470.0610.0540.413
Percentage of GuarantyLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:IntangibleAssetsGrossExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value858767717373675353515143393734
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPayableCurrent us-gaap:ConsolidatedEntities

us-gaap:InterestPayableCurrent

srt:ParentCompany


Interest
Period End2020-12-312019-12-312018-12-312017-12-31
Value4841000.04369000.05149000.01254000.0
Percentage of InterestPayableCurrent100.0100.0100.0100.0

us-gaap:InvestmentsFairValueDisclosure

us-gaap:InvestmentsFairValueDisclosure


Investments
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value10934.0013312136
Percentage of InvestmentsFairValueDisclosure100.0100.0100.0100.0100.0

us-gaap:InvestmentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1


Investments
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value10934.0013312136
Percentage of InvestmentsFairValueDisclosure100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value8093454542
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-302021-03-312020-09-302020-03-312019-12-31
Value6583113444
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0100.0100.0

us-gaap:LiabilitiesFairValueDisclosure

us-gaap:LiabilitiesFairValueDisclosure


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3331497485111706768464943363426
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel3


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3331497485111706768464943363426
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LimitedPartnersCapitalAccountUnitsOutstanding us-gaap:TitleOfIndividual

us-gaap:LimitedPartnersCapitalAccountUnitsOutstanding

nmrk:ExecutivesAndNonExecutivesEmployees


Limited
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312017-12-31
Value6335342827222013
Percentage of LimitedPartnersCapitalAccountUnitsOutstanding100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity

nmrk:CommittedLines, nmrk:WarehouseFacilityDueOctoberEightTwoThousandTwentyOne, us-gaap:SubsequentEvent


Line
Period End2021-02-01
Value900
Percentage of LineOfCreditFacilityCurrentBorrowingCapacity100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

nmrk:CommittedLines


Line
Period End2020-12-31
Value125
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:LongtermDebtType

nmrk:WarehouseLinesOfCredit


Line
Period End2020-12-31
Value2200
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity1760.0

us-gaap:LoansHeldForSaleFairValueDisclosure

us-gaap:LoansHeldForSaleFairValueDisclosure


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4158211086153710897392157048188739901132547965362
Percentage of LoansHeldForSaleFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansHeldForSaleFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4158211086153710897392157048188739901132547965362
Percentage of LoansHeldForSaleFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansHeldForSaleFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value410817106215101064210
Percentage of LoansHeldForSaleFairValueDisclosure98.699.597.898.297.797.6

us-gaap:EstimateOfFairValueFairValueDisclosure


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value415821108615371089739215704818873990362
Percentage of LoansHeldForSaleFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansHeldForSaleFairValueDisclosure us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

nmrk:WarehouseFacilities


Loans
Period End2020-12-31
Value1086
Percentage of LoansHeldForSaleFairValueDisclosure100.0

us-gaap:LossContingencyAccrualAtCarryingValue us-gaap:CounterpartyName, us-gaap:ManagingRisksInherentInServicingAssetsAndServicingLiabilitiesByTypeOfRisk

us-gaap:LossContingencyAccrualAtCarryingValue

nmrk:DBCayman, us-gaap:CreditRisk


Loss
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value12121212111111111110
Percentage of LossContingencyAccrualAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MortgagesHeldForSaleFairValueDisclosure

us-gaap:MortgagesHeldForSaleFairValueDisclosure


Mortgages
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value526527494453423412413406400406411405392381392
Percentage of MortgagesHeldForSaleFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NotesReceivableRelatedParties us-gaap:ConsolidatedEntities

us-gaap:NotesReceivableRelatedParties

srt:ParentCompany


Notes
Period End2020-12-312019-12-312018-12-312017-12-31
Value680589593670
Percentage of NotesReceivableRelatedParties100.0100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value7.17.157.117.210.07240.07240.0724
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:ForeignCountry


Operating
Period End2020-12-31
Value2200000.0
Percentage of OperatingLossCarryforwards100.0

us-gaap:OtherAssetsMiscellaneousCurrent

us-gaap:OtherAssetsMiscellaneousCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1.4391.61.8881.7171.2350.1790.7360.32200.0190.1891.022.1850.6750.131
Percentage of OtherAssetsMiscellaneousCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherAssetsMiscellaneousNoncurrent

us-gaap:OtherAssetsMiscellaneousNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value252515147.1939.3739.1332.3954.6114.7733.4524.2444.0042.4062.299
Percentage of OtherAssetsMiscellaneousNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStockConvertibleConversionRatio us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:PreferredStockConvertibleConversionRatio

srt:ChiefExecutiveOfficer


Preferred
Period End2021-03-16
Value0.9365
Percentage of PreferredStockConvertibleConversionRatio100.0

us-gaap:PreferredStockConvertibleConversionRatio us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock

srt:ChiefFinancialOfficer, us-gaap:CommonClassA


Preferred
Period End2021-03-16
Value0.9365
Percentage of PreferredStockConvertibleConversionRatio100.0

us-gaap:PrepaidExpenseCurrent

us-gaap:PrepaidExpenseCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value292718161114152112141514141612
Percentage of PrepaidExpenseCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PrepaidExpenseCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Prepaid
Period End2020-12-312019-12-31
Value3.5340.312
Percentage of PrepaidExpenseCurrent18.72.0

us-gaap:PrepaidTaxes

us-gaap:PrepaidTaxes


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value18159.2041310452220147.5769.992
Percentage of PrepaidTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashCurrent

us-gaap:RestrictedCashCurrent


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value7168666360605864
Percentage of RestrictedCashCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SecuritiesLoaned

us-gaap:SecuritiesLoaned


Securities
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value330.00.0362433430.08.589.1278.62257
Percentage of SecuritiesLoaned100.00.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:SecuritiesLoaned us-gaap:RelatedPartyTransactionsByRelatedParty

nmrk:CantorFitzgeraldCo


Securities
Period End2020-12-312020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value330.0362433430.08.69.18.657
Percentage of SecuritiesLoaned100.10.099.999.8100.199.90.0100.299.799.7100.0

us-gaap:ServicingAsset us-gaap:FairValueByAssetClass

us-gaap:ServicingAsset

nmrk:MortgageServicingRights


Servicing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value526527494453423412413406400406411405392381392386376354339
Percentage of ServicingAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ServicingAssetAtAmortizedValue us-gaap:FairValueByAssetClass

us-gaap:ServicingAssetAtAmortizedValue

nmrk:MortgageServicingRights


Servicing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value544550528488460449432426413413416406393386399392381359347271
Percentage of ServicingAssetAtAmortizedValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ServicingAssetAtFairValueAmount us-gaap:FairValueByAssetClass

us-gaap:ServicingAssetAtFairValueAmount

nmrk:MortgageServicingRights


Servicing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value577570527482448434441700430431442451444435422418
Percentage of ServicingAssetAtFairValueAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:ConsolidatedEntities, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

nmrk:BGCHoldingPartnershipUnits, us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-31
Value3.853.853.83.814.948.719.979.779.487.56
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nmrk:NewmarkHoldingsLimitedPartnership, us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value7.987.67.757.998.178.067.557.637.5613.3913.520
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue207.3197.4203.9209.7165.492.575.70.00.00.0138.40.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant


Share
Period End2021-06-302021-03-312020-12-312020-09-302019-09-302019-06-30
Value336364366371383384
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0100.0100.0100.0100.0100.0

us-gaap:SharePrice dei:LegalEntity, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock

us-gaap:SharePrice

nmrk:BGCPartnersInc, srt:ExecutiveOfficer, us-gaap:CommonClassA


Share
Period End2021-06-28
Value5.86
Percentage of SharePrice100.0

nmrk:Nasdaq, srt:ExecutiveOfficer, us-gaap:CommonClassA


Share
Period End2021-06-28
Value177.11
Percentage of SharePrice3022.4

us-gaap:SharePrice us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementClassOfStock

srt:ChiefExecutiveOfficer, us-gaap:CommonClassA


Share
Period End2021-03-16
Value11.09
Percentage of SharePrice0.0

srt:ChiefFinancialOfficer, us-gaap:CommonClassA


Share
Period End2021-03-16
Value11.09
Percentage of SharePrice0.0

srt:ExecutiveOfficer, us-gaap:CommonClassA


Share
Period End2021-06-28
Value12.5
Percentage of SharePrice213.3

srt:ExecutiveVicePresident, us-gaap:CommonClassA


Share
Period End2021-03-16
Value11.09
Percentage of SharePrice0.0

us-gaap:SharesIssuedPricePerShare us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:SharesIssuedPricePerShare

srt:ChiefExecutiveOfficer