MDC


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

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardDate, us-gaap:AwardType, us-gaap:PlanName
us-gaap:AwardType

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:CostOfGoodsAndServicesSold
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:CostsAndExpenses
us-gaap:StatementBusinessSegments
us-gaap:GrossProfit

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
us-gaap:StatementBusinessSegments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
us-gaap:StatementBusinessSegments
us-gaap:OtherNonoperatingIncomeExpense

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments, us-gaap:Subsegments

us-gaap:SellingGeneralAndAdministrativeExpense
us-gaap:StatementBusinessSegments

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

us-gaap:Liabilities
us-gaap:StatementBusinessSegments

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
us-gaap:StatementBusinessSegments
us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:InventoryNet
us-gaap:StatementBusinessSegments

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:StatementBusinessSegments

us-gaap:DeferredTaxAssetsLiabilitiesNet
us-gaap:StatementBusinessSegments
us-gaap:OperatingLeaseRightOfUseAsset
us-gaap:StatementBusinessSegments
us-gaap:OtherAssets

us-gaap:LongTermDebt
us-gaap:DebtInstrument

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability
us-gaap:BalanceSheetLocation
us-gaap:BalanceSheetLocation, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit
us-gaap:RealEstateProperties
us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividends

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance
us-gaap:RelatedPartyTransactionsByRelatedParty
mdc:CashContributionCommittedToCharitableFoundation

mdc:EstimatedCostRelatedToBonds

mdc:EstimatedCostRelatedToLettersOfCredit

mdc:GrossMarginPercentage
us-gaap:Range
mdc:LineOfCreditFacilityLeverageRatioBaseBorrowingRequired

mdc:NumeratorForEarningsPerShareDilutedUnderTwoClassMethod
us-gaap:LeaseArrangementType, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementScenario
mdc:OperatingLeasesYearlyRentalRatePerRentableSquareFoot
us-gaap:Range, us-gaap:StatementScenario, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:StatementScenario, us-gaap:LeaseArrangementType, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:StatementScenario, us-gaap:RelatedPartyTransactionsByRelatedParty

mdc:StockDividendRatePercentage
us-gaap:SubsequentEventType

mdc:UndistributedEarningsReallocatedToParticipatingSecurities
us-gaap:CreditFacility, us-gaap:VariableRate
us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

us-gaap:DepreciationAndAmortization

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:DividendsCash
us-gaap:StatementEquityComponents

us-gaap:EquitySecuritiesFvNiGainLoss

us-gaap:EquitySecuritiesFvNiRealizedGainLoss
us-gaap:StatementBusinessSegments
us-gaap:GainLossOnSaleOfMortgageLoans

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInMortgageLoansHeldForSale

us-gaap:IncreaseDecreaseInOtherOperatingAssets
us-gaap:AwardType
us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestCostsCapitalized

us-gaap:InterestCostsIncurred
us-gaap:StatementBusinessSegments
us-gaap:InvestmentIncomeInterestAndDividend

us-gaap:LeaseCost

us-gaap:LiabilityForFuturePolicyBenefitsPaymentForBenefits

us-gaap:LiabilityForFuturePolicyBenefitsPeriodExpense

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:PaymentsToAcquireOtherPropertyPlantAndEquipment
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:ProceedsFromDebtNetOfIssuanceCosts

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities

us-gaap:ProductWarrantyAccrualPayments

us-gaap:ProductWarrantyAccrualPreexistingIncreaseDecrease

us-gaap:ProductWarrantyExpense

us-gaap:RealEstateInventoryCapitalizedInterestCostsCostOfSales1

us-gaap:RealEstateInventoryCapitalizedInterestCostsIncurred
us-gaap:DebtInstrument
us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfSeniorDebt

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:AwardDate, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardDate, us-gaap:AwardType, us-gaap:PlanName, us-gaap:SubsequentEventType

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockDividend
us-gaap:StatementEquityComponents

us-gaap:SubleaseIncome

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted
us-gaap:RelatedPartyTransactionsByRelatedParty
mdc:AccruedContributionCommittedToCharitableFoundation
us-gaap:StatementBusinessSegments
mdc:ConstructionDefectClaimReserve
us-gaap:CreditFacility
mdc:DebtInstrumentCovenantMaximumLeverageRatioBaseBorrowingRequired
us-gaap:CreditFacility
mdc:DebtInstrumentCovenantMinimumCommonStockOutstandingOwnershipPercentage
us-gaap:StatementBusinessSegments
mdc:LandDevelopmentAndHomeConstructionAccruals
us-gaap:StatementBusinessSegments
mdc:LandOptionDeposits

mdc:LesseeOperatingLeaseLiabilityInterest

mdc:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour
us-gaap:CreditFacility, us-gaap:ShortTermDebtType
mdc:LineOfCreditFacilityMaximumIncreaseToBorrowingCapacity
us-gaap:StatementScenario, us-gaap:CreditFacility, us-gaap:ShortTermDebtType
us-gaap:CreditFacility
mdc:LineOfCreditFacilityOutstandingExtendedMaturityAmount

mdc:LoansReceivableHeldForSaleMortgageUnpaidPrincipalBalance
us-gaap:AwardDate, us-gaap:AwardType
mdc:MaximumRemainingExpenseToBeRecognized
us-gaap:DerivativeInstrumentRisk
mdc:NotionalAmountOfForwardRateCommitmentsAndFuturesContractsToHedgeAgainstMortgageServicingRights
us-gaap:AwardDate, us-gaap:AwardType
mdc:SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceAwardMaximumPotentialExposure
us-gaap:AwardDate, us-gaap:AwardType
mdc:SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceAwardThresholdGoalRevenue
us-gaap:SubsequentEventType
mdc:StockDividendRatePerSharesOwnedNumber

mdc:SuretyBondsOutstandingAmount
us-gaap:LineOfCreditFacility
us-gaap:StatementBusinessSegments
us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
us-gaap:StatementBusinessSegments
us-gaap:AccountsPayableAndOtherAccruedLiabilities
us-gaap:StatementBusinessSegments
us-gaap:AccountsPayableCurrentAndNoncurrent
us-gaap:StatementBusinessSegments
us-gaap:AccountsReceivableNet
us-gaap:StatementBusinessSegments
us-gaap:AccruedIncomeTaxes
us-gaap:StatementBusinessSegments
us-gaap:AccruedLiabilitiesCurrentAndNoncurrent

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
us-gaap:AwardType, us-gaap:PlanName
us-gaap:CommonStockCapitalSharesReservedForFutureIssuance
us-gaap:PlanName

us-gaap:ContractWithCustomerAssetNet
us-gaap:StatementBusinessSegments
us-gaap:ContractWithCustomerLiability

us-gaap:DebtInstrumentCarryingAmount
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis
us-gaap:DebtInstrumentFairValue
us-gaap:FairValueByMeasurementBasis
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:DebtInstrumentUnamortizedDiscount
us-gaap:StatementBusinessSegments
us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilities
us-gaap:StatementBusinessSegments
us-gaap:DeferredOfferingCosts

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsInventory

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome
us-gaap:OtherCommitments
us-gaap:Deposits
us-gaap:FinancialInstrument
us-gaap:DerivativeAverageFixedInterestRate

us-gaap:DerivativeNotionalAmount
us-gaap:FinancialInstrument
us-gaap:ConsolidatedEntities
us-gaap:DueToRelatedPartiesCurrentAndNoncurrent

us-gaap:EarnestMoneyDeposits
us-gaap:StatementBusinessSegments
us-gaap:EmployeeRelatedLiabilitiesCurrentAndNoncurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
us-gaap:StatementBusinessSegments
us-gaap:InterestPayableCurrentAndNoncurrent

us-gaap:InventoryHomesUnderConstruction
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments, us-gaap:Subsegments

us-gaap:InventoryRealEstateLandAndLandDevelopmentCosts
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments, us-gaap:Subsegments

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LettersOfCreditOutstandingAmount
us-gaap:CreditFacility
us-gaap:LineOfCreditFacility
us-gaap:OtherCommitments

us-gaap:LiabilityForUncertainTaxPositionsCurrent
us-gaap:CreditFacility
us-gaap:LineOfCredit
us-gaap:StatementBusinessSegments
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LitigationReserve

us-gaap:LoansReceivableHeldForSaleNetNotPartOfDisposalGroup
us-gaap:DerivativeInstrumentRisk
us-gaap:MortgageLoansOnRealEstateLoanType, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:StatementBusinessSegments
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:MortgagesHeldForSaleFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards
us-gaap:StatementBusinessSegments
us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent
us-gaap:StatementBusinessSegments
us-gaap:PrepaidExpenseAndOtherAssets
us-gaap:StatementBusinessSegments
us-gaap:PrepaidExpenseCurrentAndNoncurrent

us-gaap:ProductWarrantyAccrual
us-gaap:StatementBusinessSegments

us-gaap:RealEstateInventoryCapitalizedInterestCosts
us-gaap:StatementBusinessSegments
us-gaap:RestrictedCashAndCashEquivalents

us-gaap:SelfInsuranceReserve
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:SeniorNotes

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
us-gaap:StatementBusinessSegments
us-gaap:WarehouseAgreementBorrowings

Plots across concepts


IncomeStatement
Comprehensive Income Net Of Tax
Expenses
Allocated Share Based Compensation Expense
Balance Sheet
Operating Lease Liability
Assets
Property Plant And Equipment Net
Current Assets
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
NonCurrent Assets
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Noncurrent Liabilities
Long Term Debt
Stockholders Equity
Common Stock Value
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Share Based Compensation
Shares
Weighted Average Number Of Shares Outstanding Basic
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount

Tables

  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ██▇▇▇▇▇▇▅▅▅▅▅▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁0.6490.6490.6340.6310.6260.6260.6190.6150.5660.5660.5640.5620.5610.5190.5190.5160.5150.490.490.490.4890.4890.4890.4880.4880.4880.4880.4880.4880.4890.4890.4890.4870.4870.480.480.480.4750.4750.4740.472NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding NA65.8249164.0809464.931225NA63.96821563.32326762.708334NA57.22665957.04100656.895892NA52.60111852.44412351.590017NA49.00994948.86174248.833444NA49.07029149.00503748.891514NA48.8307948.85269648.854675NA48.76783448.91498448.922335NA48.17331547.75272947.57547NA46.73663846.71923346.716562NANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic NA63.86848663.01582762.491238NA61.97819561.33640460.939364NA56.17161956.10268455.871087NA51.6503651.51430951.34089NA48.85441248.8513548.827971NA48.78597348.76802148.714637NA48.62568548.64097948.585757NA48.49258848.44700548.342145NA47.76130747.39808847.31184NA46.73663846.71923346.716562NANANANA
us-gaap:EarningsPerShareBasic ▅▄▄▃▄▃▃▃▃▃▃▃▂▃▃▂▃▃▃▂▃▂▂▂▂▂▂▂▃▃█▃▃▂▂▂▁▁▁▁▁▂▂▁2.271.541.330.581.480.810.880.660.970.941.130.690.441.180.650.430.780.540.550.20.470.30.410.170.30.320.440.240.620.734.60.460.630.420.220.04-0.4-0.68-0.6-0.43-0.6499999999999999-0.22-0.08-0.45
us-gaap:EarningsPerShareDiluted ▅▄▄▃▄▃▃▃▃▃▃▃▂▃▃▂▃▃▃▂▃▂▂▂▂▂▂▂▃▃█▃▃▂▂▂▁▁▁▁▁▂▂▁2.191.491.310.561.420.790.860.640.950.931.120.680.431.160.640.430.780.540.550.20.460.30.410.170.30.320.440.230.620.734.560.450.620.410.220.04-0.4-0.68-0.6-0.43-0.6499999999999999-0.22-0.08-0.45
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 COGS Ratio us-gaap:StatementBusinessSegments mdc:HomebuildingSegment█▆▅▃▇▃▃▂▄▃▃▁▃▁▂▁1180.9871000.549886.758697.0851074.852750.274732.844647.278858.488766.027749.608607.688704.258586.287648.971563.726NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:StatementBusinessSegments mdc:HomebuildingSegment█▆▅▄▇▄▄▃▅▄▄▃▄▃▃▂▄▃▃▁▃▂1180.9871000.549886.758697.0851074.852750.274732.844647.278858.488766.027749.608607.688704.258586.287648.971563.726716.586578.012571.511396.744564.953455.646NANANANANANANANANANANANANANANANANANANANANANA
 Gross Margin us-gaap:StatementBusinessSegments mdc:HomebuildingSegment█▆▅▄▇▄▄▃▅▄▄▃▄▃▃▂▄▃▃▁▃▂1180.9871000.549886.758697.0851074.852750.274732.844647.278858.488766.027749.608607.688704.258586.287648.971563.726716.586578.012571.511396.744564.953455.646NANANANANANANANANANANANANANANANANANANANANANA
 SG&A Ratio us-gaap:StatementBusinessSegments mdc:HomebuildingSegment█▆▅▄▇▄▄▃▅▄▄▃▄▃▃▂▄▃▃▁▃▂1180.9871000.549886.758697.0851074.852750.274732.844647.278858.488766.027749.608607.688704.258586.287648.971563.726716.586578.012571.511396.744564.953455.646NANANANANANANANANANANANANANANANANANANANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AllocatedShareBasedCompensationExpense NA8.6085.4884.44NA9.7954.1324.251NA2.4254.8241.251NA1.0621.4430.595NA0.4733.1762.987NA3.9981.7160.875NA2.2041.2581.292NANANANANANANANANANANANANANANANA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardDate,us-gaap:AwardType,us-gaap:PlanName mdc:GrantedIn2017,us-gaap:PerformanceShares,mdc:EquityIncentivePlan2011NANANA1.41.75.5NA2.23.00.00.00.00.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardDate,us-gaap:AwardType,us-gaap:PlanName mdc:GrantedIn2018,us-gaap:PerformanceShares,mdc:EquityIncentivePlan2011NANA3.71.03.82.50.00.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardDate,us-gaap:AwardType,us-gaap:PlanName mdc:GrantedIn2019,us-gaap:PerformanceShares,mdc:EquityIncentivePlan2011█▆▁▁▁6.14.20.00.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardDate,us-gaap:AwardType,us-gaap:PlanName mdc:GrantedIn2020,us-gaap:PerformanceShares,mdc:EquityIncentivePlan2011NANANA3.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType us-gaap:EmployeeStockOption▃▃▃▂▃▂▂▂▂▃▂▂▁▂▂▂▁▂▆▆▇█▄▂▃▄▃▃▃▅▃▅0.8740.8140.7170.4950.5710.4290.2450.2550.420.5830.1410.056-0.2470.3910.080.276-0.0210.3282.6432.653.0573.5441.1230.3760.61.50.60.60.91.90.82.0NANANANANANANANANANANANA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType us-gaap:PerformanceSharesNA5.5233.7182.428NA7.9753.213.085NA0.9034.0630.451NA0.2260.903NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType us-gaap:RestrictedStock█▆▅▅▆▅▄▄▅▄▄▄▅▄▄▃▄▃▄▃▄▄▄▄▁▄▄▄▄▅▄▅3.3589999999999992.2711.0531.5171.8211.3910.6770.9111.2970.9390.620.7441.3760.4450.460.3190.8850.1450.5330.3370.4540.4540.5930.499-1.30.70.60.6990.51.11.01.4NANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax NANA84.39636.76NANANA40.55NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest NA98.93884.39636.76NA50.5854.59340.5554.72553.39263.89938.76425.71837.98835.81524.23542.86127.38727.80811.51127.13314.55219.6389.72817.72212.97423.8697.45834.94638.211222.91425.05130.80325.2219.948.813-12.04-51.947-29.951-16.576NANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:HomeBuilding,mdc:HomebuildingSegment█▆▅▂▇▃▃▂▄▃▃▁▃▁▂▁921.06795.172707.789558.647876.156609.316590.172524.552692.856619.248606.403496.632580.667485.147539.077468.942NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:StatementBusinessSegments mdc:HomebuildingSegment█▆▅▂▇▃▃▂▅▃▃▁▃▁▂▁921.06795.172707.789558.647876.481609.316590.172525.162702.858630.346606.603497.182583.055490.946540.279474.003NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostsAndExpenses us-gaap:StatementBusinessSegments mdc:FinancialServicesSegment█▆▅▄█▃▂▂▃▂▂▂▂▂▂▁16.06413.29412.17810.92916.11810.3529.5748.95710.359.4089.6118.8319.2878.8498.57.898NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GrossProfit us-gaap:StatementBusinessSegments mdc:HomebuildingSegment█▆▅▄▆▄▄▃▄▄▄▃▃▂▃▂▃▂▂▁▂▁259.927205.377178.969138.438198.371140.958142.672122.116155.63135.681143.005110.506121.20395.341108.69289.723115.02689.48393.85965.05589.20774.528NANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments █▆▆▄▆▄▅▄▅▄▅▄▄▅▄▃▄▃▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▁▁▁▁▂▂▁171.294126.018111.63848.562112.24662.80674.33155.60669.28667.4276.61650.53251.79889.6851.89436.3658.99838.05240.45814.27332.55823.65831.88213.32623.88523.92434.02618.6434.31834.90938.01222.58629.85119.4849.6552.125-19.776-34.189-29.803-23.704-35.066-10.594-3.699-21.242
us-gaap:IncomeTaxExpenseBenefit ▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▂▂▂▁▂▁▂▁▁▁█▁▁▁▁▁▁▁▁▁▁▁▁▁23.80627.0827.24211.80219.65712.22619.73815.05614.56114.02812.71711.76827.24628.51718.02314.11118.62211.69313.5454.719.9638.8811.8844.9069.2468.46612.4847.1363.609-1.342186.897-0.073.349-0.6420.983-0.14-0.955-2.479-1.823-3.825-5.092-0.355-0.015-0.369
us-gaap:NetIncomeLoss ▆▅▄▃▄▃▃▃▃▃▄▃▃▄▃▂▃▃▃▂▂▂▂▂▂▂▂▂▃▃█▂▃▂▂▂▁▁▁▁▁▂▂▁147.48898.93884.39636.7692.58950.5854.59340.5554.72553.39263.89938.76424.55261.16333.87122.24940.37626.35926.9139.56322.59514.77819.9988.4214.63915.45821.54211.50430.70936.251224.90922.51629.93220.12610.6382.265-18.821-31.71-27.98-19.879-29.974-10.239-3.684-20.873
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic █▆▅▂▅▃▃▃▃▃▄▂▂▄▂▂▃▂▂▁▂▁▂146.51398.28883.91236.52992.050.25654.2740.354.38653.06463.59938.53524.42560.85133.71222.13840.24126.26526.8279.52322.54814.74719.96NANANANANANANANA22.141NANANA2.105NANANANANANANANA
 us-gaap:OtherNonoperatingIncomeExpense us-gaap:StatementBusinessSegments mdc:FinancialServicesSegmentNA0.8595.931-12.064NA2.0793.6946.104NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherNonoperatingIncomeExpense us-gaap:StatementBusinessSegments mdc:HomebuildingSegmentNA-0.851-2.452-1.337-1.447-1.887-1.11-1.191-2.683-1.128-0.871-0.563-1.182-0.618-0.666-0.351-0.984-1.558-0.278-1.541-1.669-0.35NANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax █▇▆▅▇▅▅▄▆▅▅▄▅▄▄▄▅▄▄▃▄▃▃▃▃▃▃▂▃▃▃▂▃▂▂▁▂▁▁▁▂▂▂▁1225.1661037.352919.722718.9711104.468772.662751.441664.682881.875785.638770.98626.723724.114603.751668.044581.705736.329595.42587.334407.761578.911468.487473.128388.51493.07405.051430.743318.534460.939433.693400.327331.748405.773334.329258.347186.268247.203211.36215.685169.747259.566225.681326.33147.078
us-gaap:SellingGeneralAndAdministrativeExpense █▇▅▅▇▅▄▄▆▅▄▃▄▃▃▃▃▂▃▂▃▂▂▁▂▁▁▁▂▂▁▁117.949103.63292.31689.321105.10192.71682.71282.26193.36683.52381.57171.34181.37969.10270.70966.29867.91961.90464.4456.27763.5657.44454.78150.53254.60250.51249.79848.34155.42157.75351.90848.201NANANA34.124NANANA47.654NANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets █▇▇▆▆▆▅▅▅▅▅▄▄▄▃▃▃▃▃▃▃▃▃▃▃▄▄▃▄▃▃▂▁▁▁▁▁▂▃▃▃3864.923612.7743505.9353373.7123338.3563158.5793086.0973034.9193001.0772908.172847.6292787.1622780.2922566.3022536.4112506.5482528.5892474.272461.42385.8062415.8992350.8682351.9362316.4352358.4382588.2152596.5612550.2372595.4492528.0812496.5422142.3341945.4411908.4231855.9141825.5711858.7252114.9692420.3042454.5392547.769NANANA
us-gaap:Liabilities █▇▇▆▆▅▅▅▅▅▅▅▅▃▃▃▃▃▃▃▃▂▂▂▃▅▅▄▅▄▅▃▂▁▁▁▁▃▆▆▆1745.0081624.7751632.751562.6351555.8711456.7781424.9461424.2131425.0771375.4281357.7881354.6691373.0051175.3831172.7581172.9381208.5191181.6481184.3781127.5121159.6071108.2581115.7111089.9721130.1021362.641373.9521340.5481382.21347.6491357.3471227.8911064.5441001.861984.654957.505990.0891234.7591487.111483.1311564.086NANANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇▆▆▆▅▅▅▅▅▄▄▄▃▃▃▃▃▃▃▃▃▃▃▄▄▃▄▃▃▂▁▁▁▁▁▂▃▃▃3864.923612.7743505.9353373.7123338.3563158.5793086.0973034.9193001.0772908.172847.6292787.1622780.2922566.3022536.4112506.5482528.5892474.272461.42385.8062415.8992350.8682351.9362316.4352358.4382588.2152596.5612550.2372595.4492528.0812496.5422142.3341945.4411908.4231855.9141825.5711858.7252114.9692420.3042454.5392547.769NANANA
us-gaap:StockholdersEquity █▇▇▆▆▆▅▅▅▅▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁▁▁▂▂2119.9121987.9991873.1851811.0771782.4851701.8011661.1511610.7061576.01532.7421489.8411432.4931407.2871390.9191363.6531333.611320.071292.6221277.0221258.2941256.2921242.611236.2251226.4631228.3361225.5751222.6091209.6891213.2491180.4321139.195914.443880.897906.562871.26868.066868.636880.21933.194971.408983.683NANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:StatementBusinessSegments mdc:FinancialServicesSegment█▇▆▁▃▄▅▅▄▅▄▄▂▂▁▁▁▃77.26770.43562.21822.15935.74746.7956.82951.55649.05249.97947.66148.51432.47126.41923.16223.33123.82234.18NANA36.646NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:StatementBusinessSegments mdc:HomebuildingSegment▇▇█▆▇▄▆▇▇▆▆▅█▅▅▄▄▁411.362432.277482.702386.704424.186285.338390.061416.374414.724360.947378.219352.868472.957351.399314.814296.731259.087129.278NANA144.342NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▆▇█▄▅▁503.972522.444560.588424.625474.212348.453NANA470.139NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InventoryNet █▄▁2832.232645.7092505.898NA2366.575NANANANANANANANANANANANANA1827.0181811.2821763.9621779.3621672.4671664.7521667.961691.1971596.2811550.7721411.6611334.133NANA1002.521NANANANANANANANANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:PropertyPlantAndEquipmentGross 136.902NANANA124.249NANANA120.298NANANA58.671NANANA67.346NANANA62.796NANANA61.197NANANA58.274NANANA56.516NANANA55.239NANANANANANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment 75.022NANANA63.835NANANA62.131NANANA32.232NANANA39.305NANANA34.57NANANA30.706NANANA27.026NANANA23.391NANANA18.962NANANANANANANA
us-gaap:PropertyPlantAndEquipmentNet 61.88NANANA60.414NANANA58.167NANANA26.439NANANA28.041NANANA28.226NANANA30.491NANANA31.248NANANA33.125NANANA36.28837.438.76939.71140.826NANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet 11.454NANANA21.76827.729.434.537.17836.837.440.541.4864.262.470.574.88885.189.295.999.107128.4136.9148.0140.486154.542160.872174.006176.262184.986184.221NANANANANANANANANANANANANA
 us-gaap:OperatingLeaseRightOfUseAsset us-gaap:StatementBusinessSegments mdc:HomebuildingSegment▇███████▁29.22630.65331.58431.61930.27731.25131.632.6040.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LongTermDebt 1037.391NANANA989.422NANANA987.967NANANA986.597NANANA841.646NANANANANANANANANANANANANANANANANANANANA1017.3641252.261NA1268.249NANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree 6.192NANANA6.203NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive 5.38NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive 4.716NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity █▇▇▆▆▆▅▅▅▅▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁▁▁▂▂2119.9121987.9991873.1851811.0771782.4851701.8011661.1511610.7061576.01532.7421489.8411432.4931407.2871390.9191363.6531333.611320.071292.6221277.0221258.2941256.2921242.611236.2251226.4631228.3361225.5751222.6091209.6891213.2491180.4321139.195914.443880.897906.562871.26868.066868.636880.21933.194971.408983.683NANANA
us-gaap:CommonStockValue ██▇▇▇▇▇▇▅▅▅▅▅▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁0.6490.6490.6340.6310.6260.6260.6190.6150.5660.5660.5640.5620.5610.5190.5190.5160.5150.490.490.490.4890.4890.4890.4880.4880.4880.4880.4880.4880.4890.4890.4890.4870.4870.480.480.480.4750.4750.4740.472NANANA
us-gaap:AdditionalPaidInCapitalCommonStock ██▇▇▇▇▇▇▅▅▅▄▄▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1407.5971397.221359.9851361.3621348.7331341.8581333.0951318.7261168.4421162.9241156.4771146.1021144.57995.132992.87985.733983.532922.132921.66918.488915.746916.975912.921910.585909.974912.73910.535909.278908.09910.218907.192905.354896.861NANA865.739863.128850.795839.964836.36820.237NANANA
us-gaap:RetainedEarningsAccumulatedDeficit █▇▆▅▅▅▄▄▅▅▄▄▄▅▄▄▄▅▄▄▄▄▄▄▄▄▄▄▄▄▃▁▁▁▁▁▁▂▂▂▃711.666590.13512.566449.084433.126359.317327.437291.365406.992369.252332.8285.829258.164392.442344.263323.304313.952350.414336.314321.653324.342313.969311.412303.627307.419304.985301.73292.394293.096262.387226.1361.227-21.2899.9091.8393.19812.92743.6287.198127.046158.749NANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue NA8.6085.4884.44NA9.7934.1324.251NA2.4254.8241.251NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapitalNA8.6085.4884.44NA9.7934.1324.251NA2.4254.8241.251NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▃▇▃▇▁▄▆▆▄▄▂▄▂▅▇█-52.537-26.26292.877-37.17390.951-88.7831.31754.34851.34-3.0585.298-61.486-3.692-52.97227.79994.337124.82NANANANANANANANANANANANA-79.617-90.825-55.418-58.364-34.8653.223-18.8130.459-11.486-11.556-57.701-71.4941.343-190.4511.516
us-gaap:NetCashProvidedByUsedInInvestingActivities ▃▃▅▃▃▃▃▃▃▃▅▃▁█▃▃▃-5.892-7.91742.512-7.018-4.594-10.272-7.485-6.434-6.014-8.52241.127-6.377-50.257110.004-0.457-1.5-15.518NANANANANANANANANANANANA37.42118.058-107.069-14.712-45.31442.198-3.95323.10288.203187.918105.041-47.3421.021-116.38-501.767
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▃▃▂▄▂▂▁▃▃▂▁█▂▂▁▃39.957-3.9650.574-5.39639.402-12.293-10.097-41.9876.021-2.951-20.682-38.797181.559-18.439-8.63-55.23310.149NANANANANANANANANANANANA-9.936106.505218.072-30.62617.852-5.036-34.856-247.701-265.051-9.57-30.5222.494-65.93548.823206.138
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▄▃█▃█▁▄▄▆▄▅▁█▅▅▅-18.472-38.144135.963-49.587125.759-111.348-16.2655.92751.347-14.53125.743-106.66127.69943.53818.71237.604NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit ▂▃▂▂▃▂▃▂▁▂▃▂█▅▄▃▃▃▃▂▄▄▅▃▃▄▅▄▂▁2.1956.5310.8311.1314.1821.7295.0632.696-0.3630.5353.1340.42321.99212.7626.8133.224.7883.4846.0851.7888.5518.51511.5544.7135.8638.80912.4517.1032.486-2.014NANANANANANANANANANANANANANA
 us-gaap:IncreaseDecreaseInInventories us-gaap:RealEstateProperties mdc:HousingCompletedOrUnderConstruction▆▇▆█▁▇▇▄▂▄▆▆▄▆▅▅▂▅▆▇▃▅▅▄▂▆▅▆▄▆▅▅▅▆▆▅62.613153.4454.956178.873-168.265133.221120.665-2.137-119.575-1.91968.19865.378-32.44962.2918.84120.866-101.21442.93471.448115.357-74.2948.36745.756-4.282-103.47278.0447.17875.193.04665.07847.4698.6189.1666.60790.51245.875NANANANANANANANA
 us-gaap:IncreaseDecreaseInInventories us-gaap:RealEstateProperties mdc:LandAndLandUnderDevelopment▇▃▁▂█▄▂▄█▅▄▅▄▄▃▂▄▃▂▁▅▅▂▃▆▄▃▅▆▅▆▅▆▃▁▃123.742-13.792-65.867-29.051139.11634.899-42.93418.496154.28765.50612.90571.55230.05517.635-8.491-29.0316.509-18.43-54.39-68.31163.58362.724-38.1931.27480.99816.719-0.97263.71874.85271.70993.73944.7797.092-21.358-74.048-17.0NANANANANANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▃▇▃▇▁▄▆▆▄▄▂▄▂▅▇█-52.537-26.26292.877-37.17390.951-88.7831.31754.34851.34-3.0585.298-61.486-3.692-52.97227.79994.337124.82NANANANANANANANANANANANA-79.617-90.825-55.418-58.364-34.8653.223-18.8130.459-11.486-11.556-57.701-71.4941.343-190.4511.516
us-gaap:NetIncomeLoss ▆▅▄▃▄▃▃▃▃▃▄▃▃▄▃▂▃▃▃▂▂▂▂▂▂▂▂▂▃▃█▂▃▂▂▂▁▁▁▁▁▂▂▁147.48898.93884.39636.7692.58950.5854.59340.5554.72553.39263.89938.76424.55261.16333.87122.24940.37626.35926.9139.56322.59514.77819.9988.4214.63915.45821.54211.50430.70936.251224.90922.51629.93220.12610.6382.265-18.821-31.71-27.98-19.879-29.974-10.239-3.684-20.873
us-gaap:ShareBasedCompensation █▆▄▄▆▇▃▃▄▂▄▁▂▁▂▁▁▁▃▃▃▃▂▁▁▂▁▂▂▃▂▃▃▄▄▂▃▄▃▃▄▃▃▃11.5268.6085.4884.447.8389.7954.1324.2515.5172.4254.8241.2512.7571.0621.4430.5950.8410.4733.1762.9873.4773.9981.7160.8751.2242.2041.2581.2921.4123.0261.8383.3763.5974.9075.112.6113.345.4123.5593.1215.0894.2194.1464.056
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▃▃▅▃▃▃▃▃▃▃▅▃▁█▃▃▃-5.892-7.91742.512-7.018-4.594-10.272-7.485-6.434-6.014-8.52241.127-6.377-50.257110.004-0.457-1.5-15.518NANANANANANANANANANANANA37.42118.058-107.069-14.712-45.31442.198-3.95323.10288.203187.918105.041-47.3421.021-116.38-501.767
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▃▃▂▄▂▂▁▃▃▂▁█▂▂▁▃39.957-3.9650.574-5.39639.402-12.293-10.097-41.9876.021-2.951-20.682-38.797181.559-18.439-8.63-55.23310.149NANANANANANANANANANANANA-9.936106.505218.072-30.62617.852-5.036-34.856-247.701-265.051-9.57-30.5222.494-65.93548.823206.138
us-gaap:PaymentsOfDividends █▆▅▅▄▄▄▄▃▃▃▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁25.95221.37420.91420.76818.7818.70118.52117.11516.98516.9416.92816.86513.10412.98412.91212.89712.32512.25912.25212.25212.22212.22112.21212.21312.20412.20412.20512.207NANANA12.20760.86912.05611.99611.99411.87211.86811.86811.82411.78511.78511.78611.784
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value706000.0703000.0649000.0649000.0634000.0631000.0626000.0626000.0619000.0615000.0566000.0566000.0564000.0562000.0561000.0519000.0519000.0516000.0515000.0490000.0490000.0490000.0489000.0489000.0489000.0488000.0488000.0488000.0488000.0488000.0488000.0489000.0489000.0489000.0487000.0487000.0480000.0480000.0480000.0475000.0475000.0474000.0472000.0471000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value7272656464636362575756525251494848494948484848484848484747464646
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value7069636362616160565655515151484848484848484848484848474747464646
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.191.582.271.541.330.581.480.810.880.660.970.941.130.690.441.180.650.430.780.540.550.20.470.30.410.170.30.320.440.240.620.734.60.460.630.420.220.04-0.4-0.68-0.6-0.43-0.65-0.22-0.08-0.45
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.111.512.191.491.310.561.420.790.860.640.950.931.120.680.431.160.640.430.780.540.550.20.460.30.410.170.30.320.440.230.620.734.560.450.620.410.220.04-0.4-0.68-0.6-0.43-0.65-0.22-0.08-0.45
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value9.0199.9268.6085.4884.449.7954.1324.2512.4254.8241.2511.0621.4430.5950.4733.1762.9873.9981.7160.8752.2041.2581.292
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.80.60.61.30.50.60.30.60.20.20.20.10.10.50.70.90.40.20.50.30.4

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardDate, us-gaap:AwardType, us-gaap:PlanName

mdc:GrantedIn2017, us-gaap:PerformanceShares, mdc:EquityIncentivePlan2011


Allocated
Period End2021-03-312020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.41.41.75.52.23.00.00.00.00.00.0
Percentage of AllocatedShareBasedCompensationExpense14.131.50.056.251.80.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.20.20.70.30.30.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:GrantedIn2017 us-gaap:PerformanceShares mdc:EquityIncentivePlan20110.00.00.00.00.00.00.00.00.00.00.0

mdc:GrantedIn2018, us-gaap:PerformanceShares, mdc:EquityIncentivePlan2011


Allocated
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1.31.33.71.03.82.50.00.00.0
Percentage of AllocatedShareBasedCompensationExpense14.413.167.422.50.025.50.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.40.10.30.30.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:GrantedIn2018 us-gaap:PerformanceShares mdc:EquityIncentivePlan20110.00.00.00.00.00.00.00.00.0

mdc:GrantedIn2019, us-gaap:PerformanceShares, mdc:EquityIncentivePlan2011


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1.81.86.14.20.00.00.0
Percentage of AllocatedShareBasedCompensationExpense20.018.10.048.80.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.50.40.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:GrantedIn2019 us-gaap:PerformanceShares mdc:EquityIncentivePlan20110.00.00.00.00.00.00.0

mdc:GrantedIn2020, us-gaap:PerformanceShares, mdc:EquityIncentivePlan2011


Allocated
Period End2021-06-302020-03-31
Value5.03.5
Percentage of AllocatedShareBasedCompensationExpense55.478.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:GrantedIn2020 us-gaap:PerformanceShares mdc:EquityIncentivePlan20110.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType

us-gaap:EmployeeStockOption


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.7250.8640.8740.8140.7170.4950.5710.4290.2450.2550.420.5830.1410.056-0.2470.3910.080.276-0.0210.3282.6432.653.0573.5441.1230.3760.61.50.60.60.91.90.82.0
Percentage of AllocatedShareBasedCompensationExpense8.08.70.09.513.111.10.04.45.96.00.024.02.94.50.036.85.546.40.069.383.288.70.088.665.443.00.068.147.746.40.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.10.10.10.10.10.10.00.00.00.10.00.0-0.00.10.00.0-0.00.10.40.60.50.80.20.10.10.40.10.20.20.40.20.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:EmployeeStockOption0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PerformanceShares


Allocated
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value6.8426.5935.5233.7182.4287.9753.213.0850.9034.0630.4510.2260.903
Percentage of AllocatedShareBasedCompensationExpense75.966.464.267.754.781.477.772.637.284.236.121.362.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.50.40.31.00.40.50.10.50.10.00.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:PerformanceShares0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RestrictedStock


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1.4522.4693.3589999999999992.2711.0531.5171.8211.3910.6770.9111.2970.9390.620.7441.3760.4450.460.3190.8850.1450.5330.3370.4540.4540.5930.499-1.30.70.60.6990.51.11.01.4
Percentage of AllocatedShareBasedCompensationExpense16.124.90.026.419.234.20.014.216.421.40.038.712.959.50.041.931.953.60.030.716.811.30.011.434.657.00.031.847.754.10.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.30.20.10.20.20.20.10.10.10.10.10.10.20.10.10.10.10.00.10.10.10.10.10.1-0.30.20.10.20.10.30.20.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RestrictedStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302020-06-302020-03-312019-03-31
Value154843640
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.09.25.16.1

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1109884365054405453633825373524422727112714199.7281712237.45834382222530259.948.813-12.04-51.947-29.951-16.576
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.09.59.25.16.57.36.16.26.88.36.23.66.35.44.25.84.64.72.84.73.14.22.53.63.25.52.37.68.855.77.67.67.53.84.7-4.9-24.6-13.9-9.8

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:CostOfGoodsAndServicesSold

us-gaap:HomeBuilding, mdc:HomebuildingSegment


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1051813921795707558876609590524692619606496580485539468
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.075.276.777.077.779.378.978.578.978.678.878.779.280.280.480.780.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:HomeBuilding mdc:HomebuildingSegment0.00.00.00.00.080.10.081.280.581.00.080.880.981.70.082.983.283.2

us-gaap:CostOfGoodsAndServicesSold us-gaap:StatementBusinessSegments

mdc:HomebuildingSegment


Cost
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
Value921795707558876609590525702630606497583490540474
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.1101.4101.8100.0100.1100.4101.2100.2101.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax75.276.777.077.779.478.978.579.079.780.278.779.380.581.380.981.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:HomebuildingSegment0.079.579.880.10.081.280.581.10.082.380.981.80.083.783.384.1

Costs And Expenses

us-gaap:CostsAndExpenses us-gaap:StatementBusinessSegments

us-gaap:CostsAndExpenses

mdc:FinancialServicesSegment


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value16151613121016109.5748.957109.4089.6118.8319.2878.8498.57.898
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.01.31.31.31.51.51.31.31.31.21.21.21.41.31.51.31.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:FinancialServicesSegment0.00.00.00.00.049.90.046.251.551.50.048.045.046.40.050.744.643.9

Gross Profit

us-gaap:GrossProfit us-gaap:StatementBusinessSegments

us-gaap:GrossProfit

mdc:HomebuildingSegment


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value31622725920517813819814014212215513514311012195108891158993658974
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.021.219.819.519.318.018.219.018.417.617.318.517.616.715.816.315.415.615.016.016.015.415.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:HomebuildingSegment23.121.90.020.520.219.90.018.819.518.90.017.719.118.20.016.316.715.90.015.516.416.40.016.4

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2051441711261114811262745569677650518951365838401432233113232334183434382229199.6552.125-19.776-34.189-29.803-23.704-35.066-10.594-3.699-21.242
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.014.012.112.16.810.28.19.98.47.98.69.98.17.214.97.86.38.06.46.93.55.65.06.73.44.85.97.95.97.48.09.56.87.45.83.71.1-8.0-16.2-13.8-14.0-13.5-4.7-1.1-14.4

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:CorporateNonSegment, mdc:HomebuildingSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-20.308-17.373-16.875-11.543-8.704-9.319-17.551-19.734-11.86-15.332-17.386-14.432-15.366-11.472-14.88841-10.246-10.976-6.888-7.306-9.582-12.493-12.865-13.47
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments-9.9-12.0-9.9-9.2-7.8-19.2-15.6-31.4-16.0-27.6-25.1-21.4-20.1-22.7-28.746.3-19.7-30.2-11.7-19.2-23.7-87.5-39.5-56.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-1.4-1.1-0.9-1.3-1.6-2.6-1.6-2.3-2.0-1.8-2.0-1.8-2.16.9-1.5-1.9-0.9-1.2-1.6-3.1-2.2-2.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:CorporateNonSegment mdc:HomebuildingSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments, us-gaap:Subsegments

us-gaap:OperatingSegments, mdc:FinancialServicesSegment, mdc:MortgageOperations


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value14262420178.2439.6128.4686.2394.9938.6586.7029.047.527.5355.8577.677.5667.3546.7236.4453.3234.9875.354
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments6.918.014.316.515.717.08.613.58.49.012.59.911.814.914.56.514.820.812.517.715.923.315.322.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.02.02.01.91.10.91.10.80.81.00.91.21.21.01.01.11.31.01.11.10.80.91.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments mdc:FinancialServicesSegment mdc:MortgageOperations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, mdc:FinancialServicesSegment, mdc:OtherFinancialServices


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value3.9454.7664.5583.5599.211-9.359.2325.6476.4789.558-1.0857.7355.2392.5514.0073.6544.0613.4434.0033.6542.6072.2944.0892.908
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments1.93.32.72.88.3-19.38.29.08.717.2-1.611.56.85.07.74.17.89.56.89.66.416.112.612.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.40.31.0-1.30.80.70.91.4-0.11.00.70.40.60.60.60.60.50.60.40.60.70.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments mdc:FinancialServicesSegment mdc:OtherFinancialServices0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, mdc:HomebuildingSegment, mdc:ReportableSegmentEast


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value107.835106.023.0730.94.0962.1362.1521.4731.3243.7714.1413.3754.4292.6134.7342.6421.349-2.2674.51.367-4.94-0.691
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments5.35.45.84.82.81.93.63.42.92.61.95.65.46.78.62.99.17.32.3-6.011.19.6-15.2-2.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.80.60.30.10.40.30.30.20.20.50.50.50.60.40.70.50.2-0.40.80.3-0.9-0.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments mdc:HomebuildingSegment mdc:ReportableSegmentEast0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, mdc:HomebuildingSegment, mdc:ReportableSegmentMountain


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value644563484121473135213934352425182418231820101712
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments31.231.837.138.137.444.342.150.048.439.057.751.546.847.948.920.447.350.139.749.651.370.753.754.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.05.24.64.53.04.34.14.83.34.54.44.73.93.53.03.73.13.23.23.52.53.02.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments mdc:HomebuildingSegment mdc:ReportableSegmentMountain0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, mdc:HomebuildingSegment, mdc:ReportableSegmentWest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value13277855948365934353337283724251721152918159.6982316
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments64.753.549.946.943.775.353.155.647.659.754.642.949.248.249.019.840.742.550.448.338.967.973.270.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.07.05.75.35.15.44.54.75.04.33.74.93.93.52.93.22.74.03.12.72.44.13.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments mdc:HomebuildingSegment mdc:ReportableSegmentWest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:StatementBusinessSegments

mdc:FinancialServicesSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value1830292426-1.107181412147.573141410119.511111111109.0525.6179.0768.262
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments8.821.316.919.323.9-2.316.822.517.126.210.921.418.619.922.310.622.630.319.227.322.439.427.934.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.02.42.32.9-0.21.71.81.72.20.91.81.91.61.61.61.81.91.51.71.51.41.61.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:FinancialServicesSegment0.00.00.00.00.0-5.10.063.068.483.60.073.666.852.90.054.561.561.20.00.00.00.00.00.0

mdc:HomebuildingSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value18711314210184499348614161526240408040254727318.6562315
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments91.278.783.180.776.1102.383.277.582.973.889.178.681.480.177.789.477.469.780.872.777.660.672.165.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.011.69.89.26.98.56.38.26.27.06.78.16.55.613.36.04.46.54.65.32.14.13.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:HomebuildingSegment13.710.90.010.29.67.10.06.58.46.30.06.98.36.70.013.76.24.50.04.85.52.20.03.4

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value5133232727111912191514141211272818141811134.719.9638.88114.9069.2468.466127.1363.609-1.342186-0.073.349-0.6420.983-0.14-0.955-2.479-1.823-3.825-5.092-0.355-0.015-0.369
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.01.92.63.01.61.81.62.62.31.71.81.61.93.84.72.72.42.52.02.31.21.71.92.51.31.92.12.92.20.8-0.346.7-0.00.8-0.20.4-0.1-0.4-1.2-0.8-2.3-2.0-0.2-0.0-0.3

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1541101479884369250544054536338246133224026269.5632214198.42141521113036224222920102.265-18.821-31.71-27.98-19.879-29.974-10.239-3.684-20.873
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.012.09.59.25.18.46.57.36.16.26.88.36.23.410.15.13.85.54.44.62.33.93.24.22.23.03.85.03.66.78.456.26.87.46.04.11.2-7.6-15.0-13.0-11.7-11.5-4.5-1.1-14.2

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value154110988436505440536338
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.09.59.25.16.57.36.16.88.36.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302013-03-312012-03-31
Value1531101469883369250544054536338246033224026269.523221419222.105
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.012.09.59.15.18.36.57.26.16.26.88.26.13.410.15.03.85.54.44.62.33.93.14.26.71.1

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense us-gaap:StatementBusinessSegments

us-gaap:OtherNonoperatingIncomeExpense

mdc:FinancialServicesSegment


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1.1550.8870.8595.931-12.0642.0793.6946.104
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.10.6-1.70.30.50.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:FinancialServicesSegment0.00.00.00.0-55.19.319.935.1

mdc:HomebuildingSegment


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-1.09-0.437-0.851-2.452-1.337-1.447-1.887-1.11-1.191-2.683-1.128-0.871-0.563-1.182-0.618-0.666-0.351-0.984-1.558-0.278-1.541-1.669-0.35
Percentage of OtherNonoperatingIncomeExpense-94.4-49.3-99.1-41.311.10.0-90.8-30.0-19.50.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-0.1-0.3-0.2-0.1-0.2-0.1-0.2-0.3-0.1-0.1-0.1-0.2-0.1-0.1-0.1-0.1-0.3-0.0-0.4-0.3-0.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:HomebuildingSegment-0.1-0.0-0.1-0.3-0.20.0-0.3-0.2-0.20.0-0.1-0.1-0.10.0-0.1-0.1-0.10.0-0.3-0.0-0.40.0-0.1

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value122510379197181104772751664881785770626724603668581736595587407578468473388493405430318460433400331405334258186247211215169259225326147
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService

us-gaap:HomeBuilding


Revenue
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
Value118010008866971074750732647858766749607702584647563
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax96.496.596.497.097.397.197.597.497.397.597.297.097.096.996.996.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax96.496.596.497.097.397.197.597.497.397.597.297.097.096.996.996.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:HomeBuilding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:FinancialService, mdc:FinancialServicesSegment


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value33453632212218
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.03.53.63.02.92.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.03.53.63.02.92.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:FinancialService mdc:FinancialServicesSegment100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments

mdc:HomebuildingSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value13671041118010008866971074750732647858766749607704586648563716578571396564455
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.096.496.596.497.097.397.197.597.497.397.597.297.097.397.197.196.997.397.197.397.397.697.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.096.496.596.497.097.397.197.597.497.397.597.297.097.397.197.196.997.397.197.397.397.697.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:HomebuildingSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments, us-gaap:Subsegments

mdc:FinancialServicesSegment, mdc:MortgageOperations


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
Value233534282414181411101411141212111212
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.02.82.82.62.01.71.91.61.51.61.51.92.01.81.91.92.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.02.82.82.62.01.71.91.61.51.61.51.92.01.81.91.92.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:FinancialServicesSegment mdc:MortgageOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:FinancialServicesSegment, mdc:OtherFinancialServices


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
Value9.9979.858108.2558.6017.261107.9936.9087.239.0737.6926.8256.3397.0716.2886.3765.796
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.80.80.91.01.01.00.91.11.01.00.91.01.01.01.01.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.80.80.91.01.01.00.91.11.01.00.91.01.01.01.01.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:FinancialServicesSegment mdc:OtherFinancialServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:FinancialServicesSegment, mdc:ReportableSegmentWest


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value33453632212218
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.03.53.63.02.92.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.03.53.63.02.92.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:FinancialServicesSegment mdc:ReportableSegmentWest100.0100.0100.0100.0100.0100.0100.0

mdc:HomebuildingSegment, mdc:ReportableSegmentEast


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
Value119100115101796897766068818489791069210081
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.09.49.78.79.68.89.88.110.39.210.711.612.714.715.315.114.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.09.49.78.79.68.89.88.110.39.210.711.612.714.715.315.114.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:HomebuildingSegment mdc:ReportableSegmentEast100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:HomebuildingSegment, mdc:ReportableSegmentMountain


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
Value400324407347316222371263287209330272268208241167224173
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.033.233.534.431.033.634.138.331.537.534.734.833.333.327.733.629.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.033.233.534.431.033.634.138.331.537.534.734.833.333.327.733.629.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:HomebuildingSegment mdc:ReportableSegmentMountain100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:HomebuildingSegment, mdc:ReportableSegmentWest


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
Value847616658552490405606410384369446409391319356326323309
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.053.753.253.356.454.953.151.255.650.752.150.851.049.254.148.553.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.053.753.253.356.454.953.151.255.650.752.150.851.049.254.148.553.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:HomebuildingSegment mdc:ReportableSegmentWest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-03-312011-03-31
Value11710392891059282829383817181697066676164566357545054504948555751483447
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.610.010.012.49.512.011.012.410.610.610.611.411.211.410.611.49.210.411.013.811.012.311.613.011.112.511.615.212.013.313.014.518.328.1

us-gaap:SellingGeneralAndAdministrativeExpense us-gaap:StatementBusinessSegments

mdc:HomebuildingSegment


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value12811411710392891059282829383817181697066676164566357
Percentage of SellingGeneralAndAdministrativeExpense0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.09.610.010.012.49.512.011.012.410.610.610.611.411.211.410.611.49.210.411.013.811.012.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax mdc:HomebuildingSegment9.411.010.010.410.412.89.812.411.312.710.910.910.911.711.611.810.911.89.510.711.314.211.312.6

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value44584382386436123505337333383158308630343001290828472787278025662536250625282474246123852415235023512316235825882596255025952528249621421945190818551825185821142420245425472429
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:CorporateNonSegment, mdc:HomebuildingSegment


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value690738470507555466505379481514484427445472597450501489454332393
Percentage of Assets15.516.912.214.115.813.815.112.015.616.916.114.715.616.921.517.619.819.518.013.416.3
Percentage of Assets15.516.912.214.115.813.815.112.015.616.916.114.715.616.921.517.619.819.518.013.416.3
Percentage of Assets us-gaap:CorporateNonSegment mdc:HomebuildingSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, mdc:FinancialServicesSegment, mdc:MortgageOperations


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value225297279196194154209131122123159127121128152102107108153129123
Percentage of Assets5.16.87.25.45.54.66.34.24.04.15.34.44.34.65.54.04.34.36.15.25.1
Percentage of Assets5.16.87.25.45.54.66.34.24.04.15.34.44.34.65.54.04.34.36.15.25.1
Percentage of Assets us-gaap:OperatingSegments mdc:FinancialServicesSegment mdc:MortgageOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mdc:FinancialServicesSegment, mdc:OtherFinancialServices


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value9185787267699710210710093100929069646059575446
Percentage of Assets2.11.92.02.01.92.12.93.23.53.33.13.53.23.32.52.52.42.42.32.21.9
Percentage of Assets2.11.92.02.01.92.12.93.23.53.33.13.53.23.32.52.52.42.42.32.21.9
Percentage of Assets us-gaap:OperatingSegments mdc:FinancialServicesSegment mdc:OtherFinancialServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mdc:HomebuildingSegment, mdc:ReportableSegmentEast


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value372309274248220216194190188170169181179189201217230247256285324
Percentage of Assets8.37.17.16.96.36.45.86.06.15.65.66.26.36.87.38.59.19.910.211.513.4
Percentage of Assets8.37.17.16.96.36.45.86.06.15.65.66.26.36.87.38.59.19.910.211.513.4
Percentage of Assets us-gaap:OperatingSegments mdc:HomebuildingSegment mdc:ReportableSegmentEast100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mdc:HomebuildingSegment, mdc:ReportableSegmentMountain


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value994983905927893907869873816818793795740717674677630613571588536
Percentage of Assets22.322.423.425.725.526.926.127.726.527.026.427.426.025.824.226.424.924.522.623.822.2
Percentage of Assets22.322.423.425.725.526.926.127.726.527.026.427.426.025.824.226.424.924.522.623.822.2
Percentage of Assets us-gaap:OperatingSegments mdc:HomebuildingSegment mdc:ReportableSegmentMountain100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mdc:HomebuildingSegment, mdc:ReportableSegmentWest


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value2083196818551660157515591461148113681307130112741268118710841052100598710351083991
Percentage of Assets46.744.948.046.044.946.243.846.944.443.143.443.844.542.639.041.039.639.440.943.841.0
Percentage of Assets46.744.948.046.044.946.243.846.944.443.143.443.844.542.639.041.039.639.440.943.841.0
Percentage of Assets us-gaap:OperatingSegments mdc:HomebuildingSegment mdc:ReportableSegmentWest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:StatementBusinessSegments

mdc:FinancialServicesSegment


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value317382358268261224306233230223252228214219222167168168211183169
Percentage of Assets7.18.79.37.47.56.69.27.47.57.48.47.97.57.98.06.56.66.78.37.47.0
Percentage of Assets7.18.79.37.47.56.69.27.47.57.48.47.97.57.98.06.56.66.78.37.47.0
Percentage of Assets mdc:FinancialServicesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:HomebuildingSegment


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value414040003506334432443149303129242856281027482679263325672558239823682338231722902246
Percentage of Assets92.991.390.792.692.593.490.892.692.592.691.692.192.592.192.093.593.493.391.792.693.0
Percentage of Assets92.991.390.792.692.593.490.892.692.592.691.692.192.592.192.093.593.493.391.792.693.0
Percentage of Assets mdc:HomebuildingSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value21252168174516241632156215551456142414241425137513571354137311751172117212081181118411271159110811151089113013621373134013821347135712271064100198495799012341487148315641356
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets47.749.545.145.046.646.346.646.146.246.947.547.347.748.649.445.846.246.847.847.848.147.348.047.147.447.147.952.652.952.653.353.354.457.354.752.553.152.453.358.461.460.461.455.8

us-gaap:Liabilities us-gaap:StatementBusinessSegments

mdc:FinancialServicesSegment


Liabilitiesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value264319298215212179218152143143175145134144165116119121165148140
Percentage of Liabilities12.414.717.113.213.011.514.010.510.110.112.310.69.910.612.09.910.110.413.712.612.1
Percentage of Assets5.97.37.76.06.15.36.54.84.74.75.85.04.75.26.04.64.74.96.56.05.8
Percentage of Assets mdc:FinancialServicesSegment83.283.483.180.081.180.171.165.362.464.269.363.762.665.674.569.770.772.578.381.083.0

mdc:HomebuildingSegment


Liabilitiesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value186118481446140914201382133713041281128012491229122312101207105810531050104310321018
Percentage of Liabilities87.685.382.986.887.088.586.089.589.989.987.789.490.189.488.090.189.989.686.387.487.9
Percentage of Assets41.842.237.439.040.541.040.141.341.542.241.642.343.043.443.441.241.541.941.341.742.2
Percentage of Assets mdc:HomebuildingSegment45.046.241.342.243.843.944.144.644.945.645.545.946.547.147.244.144.544.945.045.145.4

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value44584382386436123505337333383158308630343001290828472787278025662536250625282474246123852415235023512316235825882596255025952528249621421945190818551825185821142420245425472429
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value233222142119198718731811178217011661161015761532148914321407139013631333132012921277125812561242123612261228122512221209121311801139914880906871868868880933971983107310801476
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets52.350.554.955.053.453.753.453.953.853.152.552.752.351.450.654.253.853.252.252.251.952.752.052.952.652.952.147.447.147.446.746.745.642.745.347.546.947.646.741.638.639.638.644.20.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value168916981407139713591361134813411333131811681162115611461144983915
Percentage of StockholdersEquity72.476.766.470.372.675.275.778.880.381.974.175.977.680.081.374.572.9
Percentage of Assets37.938.736.438.738.840.440.442.543.243.538.940.040.641.141.238.937.9
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value0.7060.7030.6490.6490.6340.6310.6260.6260.6190.6150.5660.5660.5640.5620.5610.5150.489
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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
Value642516711590512449433359327291406369332285258313324
Percentage of StockholdersEquity27.523.333.629.727.424.824.321.119.718.125.824.122.320.018.323.825.8
Percentage of Assets14.411.818.416.314.613.313.011.410.69.613.612.711.710.39.312.413.4
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:StatementBusinessSegments

us-gaap:CashAndCashEquivalentsAtCarryingValue

mdc:FinancialServicesSegment


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value888177706222354656514949474832262323233436
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.01.92.01.91.80.71.11.51.81.71.61.71.71.71.21.00.90.90.91.41.5
Percentage of Assets mdc:FinancialServicesSegment27.921.221.626.223.89.911.620.024.723.019.421.922.222.114.615.813.813.911.318.621.6

mdc:HomebuildingSegment


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value638678411432482386424285390416414360378352472351314296259129144
Percentage of CashAndCashEquivalentsAtCarryingValue720.3836.2532.4613.7775.81745.11186.6609.8686.4807.6845.5722.2793.6727.41456.61330.11359.21271.81087.6378.2393.9
Percentage of Assets14.315.510.612.013.811.512.79.012.613.713.812.413.312.717.013.712.411.810.25.26.0
Percentage of Assets mdc:HomebuildingSegment15.417.011.712.914.912.314.09.813.714.815.113.514.413.718.514.613.312.711.25.66.4

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value741776503522560424474348470
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.617.713.014.516.012.614.211.015.7

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value3182301628322645250523661827181117631779167216641667169115961550141113341002
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets71.468.873.373.271.570.974.275.973.075.771.171.970.765.361.560.854.452.851.5

us-gaap:InventoryNet us-gaap:StatementBusinessSegments

mdc:HomebuildingSegment


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value318230162832264525052516236623952227214921322107205519731829183217561746175818471763
Percentage of InventoryNet100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0
Percentage of Assets71.468.873.373.271.574.670.975.872.270.871.172.572.270.865.871.469.369.769.674.773.0
Percentage of Assets mdc:HomebuildingSegment76.975.480.879.177.279.978.181.978.076.577.678.778.076.971.576.474.274.775.980.678.5

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value13612412058676261585655
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.53.74.02.12.72.62.62.22.93.0

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

mdc:Airplane


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value313131302928282828
Percentage of PropertyPlantAndEquipmentGross22.825.125.851.943.846.247.449.851.3
Percentage of Assets0.80.91.01.11.21.21.21.11.5
Percentage of Assets mdc:Airplane0.00.00.00.00.00.00.00.00.0

mdc:ComputerSoftwareAndEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value23222120232120181717
Percentage of PropertyPlantAndEquipmentGross17.418.217.934.635.534.133.731.631.731.6
Percentage of Assets0.60.70.70.70.90.90.90.70.90.9
Percentage of Assets mdc:ComputerSoftwareAndEquipment0.00.00.00.00.00.00.00.00.00.0

mdc:SalesFacilities


Property
Period End2020-12-312019-12-312018-12-31
Value716059
Percentage of PropertyPlantAndEquipmentGross52.549.149.4
Percentage of Assets1.91.82.0
Percentage of Assets mdc:SalesFacilities0.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value7.647.3396.8276.611109.6178.7937.6236.881
Percentage of PropertyPlantAndEquipmentGross5.65.95.711.217.116.315.715.113.512.5
Percentage of Assets0.20.20.20.20.50.40.40.30.40.4
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherCapitalizedPropertyPlantAndEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2.3612.0561.5771.3612.412.1991.9892.0481.9911.891
Percentage of PropertyPlantAndEquipmentGross1.71.71.32.33.63.53.33.53.53.4
Percentage of Assets0.10.10.10.00.10.10.10.10.10.1
Percentage of Assets us-gaap:OtherCapitalizedPropertyPlantAndEquipment0.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value75636232393430272318
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.91.92.11.21.61.41.31.01.21.0

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:PropertyPlantAndEquipmentByType

mdc:Airplane


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value10109.4888.8668.257.7017.1526.6046.055
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment14.415.915.327.521.022.323.324.425.9
Percentage of Assets0.30.30.30.30.30.30.30.30.3
Percentage of Assets mdc:Airplane0.00.00.00.00.00.00.00.00.0

mdc:ComputerSoftwareAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value21201917201614119.5136.339
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment29.332.531.254.651.748.045.943.640.733.4
Percentage of Assets0.60.60.60.60.80.70.60.50.50.3
Percentage of Assets mdc:ComputerSoftwareAndEquipment0.00.00.00.00.00.00.00.00.00.0

mdc:SalesFacilities


Accumulated
Period End2020-12-312019-12-312018-12-31
Value342526
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment45.740.443.3
Percentage of Assets0.90.80.9
Percentage of Assets mdc:SalesFacilities0.00.00.0

us-gaap:LeaseholdImprovements


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value6.3575.8175.1884.7659.378.3177.596.7876.0665.471
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment8.59.18.414.823.824.124.725.125.928.9
Percentage of Assets0.20.20.20.20.40.30.30.30.30.3
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherCapitalizedPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1.5831.3411.1610.991.3561.9531.881.8551.7571.646
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment2.12.11.93.13.45.66.16.97.58.7
Percentage of Assets0.00.00.00.00.10.10.10.10.10.1
Percentage of Assets us-gaap:OtherCapitalizedPropertyPlantAndEquipment0.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value616058262828303133363738394038
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.81.91.01.11.21.31.21.72.01.81.61.61.61.6

us-gaap:PropertyPlantAndEquipmentNet us-gaap:PropertyPlantAndEquipmentByType

mdc:Airplane


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value202121212121212222
Percentage of PropertyPlantAndEquipmentNet33.034.937.081.575.875.471.671.769.3
Percentage of Assets0.50.60.70.80.80.90.90.91.2
Percentage of Assets mdc:Airplane0.00.00.00.00.00.00.00.00.0

mdc:ComputerSoftwareAndEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1.8041.932.1332.6763.584.7946.516.6568.3921114
Percentage of PropertyPlantAndEquipmentNet2.93.23.710.112.817.021.421.325.330.735.2
Percentage of Assets0.00.10.10.10.10.20.30.30.40.60.6
Percentage of Assets mdc:ComputerSoftwareAndEquipment0.00.00.00.00.00.00.00.00.00.00.0

mdc:SalesFacilities


Property
Period End2020-12-312019-12-312018-12-31
Value373532
Percentage of PropertyPlantAndEquipmentNet60.858.255.8
Percentage of Assets1.01.11.1
Percentage of Assets mdc:SalesFacilities0.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1.2831.5221.6391.8352.161.892.0272.0061.5571.4192.136
Percentage of PropertyPlantAndEquipmentNet2.12.52.86.97.76.76.66.44.73.95.2
Percentage of Assets0.00.00.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherCapitalizedPropertyPlantAndEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value0.7780.7150.4160.3711.0540.2460.1090.1930.2340.2450.276
Percentage of PropertyPlantAndEquipmentNet1.31.20.71.43.80.90.40.60.70.70.7
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:OtherCapitalizedPropertyPlantAndEquipment0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementBusinessSegments

mdc:HomebuildingSegment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value596061646262606362595856555326262727282828
Percentage of PropertyPlantAndEquipmentNet0.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.0100.0
Percentage of Assets1.31.41.61.81.81.81.82.02.02.01.91.91.91.91.01.01.11.11.11.21.2
Percentage of Assets mdc:HomebuildingSegment1.41.51.81.91.92.02.02.22.22.12.12.12.12.11.01.11.11.21.21.31.3

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value112127293437363740416462707485899599128136148140154160174176184184
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.70.91.01.11.21.31.31.51.52.52.52.83.03.43.64.04.15.55.86.46.06.06.26.86.87.37.4

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:StatementBusinessSegments

us-gaap:OperatingLeaseRightOfUseAsset

mdc:HomebuildingSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value272829303131303131320.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.60.70.80.80.90.90.91.01.01.10.0
Percentage of Assets mdc:HomebuildingSegment0.70.70.80.91.01.01.01.11.11.20.0

Other Assets

us-gaap:OtherAssets us-gaap:StatementBusinessSegments

us-gaap:OtherAssets

mdc:FinancialServicesSegment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value43704837252417161515131415179.61711119.86129.595.883
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.01.61.31.00.70.70.50.50.50.50.50.50.50.60.30.40.40.40.50.40.2
Percentage of Assets mdc:FinancialServicesSegment13.518.513.614.19.910.85.77.36.97.15.46.47.07.84.36.66.75.95.75.23.5

mdc:HomebuildingSegment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.1330.5110.4920.7850.7760.5061.2881.2460.880.6930.9951.1571.0431.9261.221.1951.4531.3861.384
Percentage of OtherAssets0.30.71.02.13.02.17.47.35.64.47.27.96.911.312.710.713.014.111.5
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.00.10.10.1
Percentage of Assets mdc:HomebuildingSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.00.10.10.1

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312011-09-302011-06-302010-12-31
Value1037989987986841101712521268
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.829.632.935.533.348.151.749.8

us-gaap:LongTermDebt us-gaap:DebtInstrument

mdc:SeniorNotes3850DueJanuary2030


Long
Period End2020-12-31
Value297
Percentage of LongTermDebt28.7
Percentage of Assets7.7
Percentage of Assets mdc:SeniorNotes3850DueJanuary20300.0

mdc:SeniorNotes5Point5PercentDueJanuary2024


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value249249248248248
Percentage of LongTermDebt24.025.225.225.229.5
Percentage of Assets6.47.58.38.99.8
Percentage of Assets mdc:SeniorNotes5Point5PercentDueJanuary20240.00.00.00.00.0

mdc:SeniorNotes6PercentDueJanuary2043


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value490490490490346
Percentage of LongTermDebt47.349.649.649.741.2
Percentage of Assets12.714.716.317.613.7
Percentage of Assets mdc:SeniorNotes6PercentDueJanuary20430.00.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-312019-12-31
Value6192000.06203000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0
Percentage of Assets0.20.2

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value5380000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value4716000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.1

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value303232333434
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0
Percentage of Assets0.81.01.01.11.10.0

us-gaap:OperatingLeaseLiability us-gaap:BalanceSheetLocation

us-gaap:AccountsPayableAndAccruedLiabilities


Operating
Period End2020-12-31
Value30
Percentage of OperatingLeaseLiability101.8
Percentage of Assets0.8
Percentage of Assets us-gaap:AccountsPayableAndAccruedLiabilities0.0

us-gaap:OperatingLeaseLiability us-gaap:BalanceSheetLocation, us-gaap:StatementBusinessSegments

us-gaap:AccountsPayable, mdc:HomebuildingSegment


Operating
Period End2020-12-31
Value30
Percentage of OperatingLeaseLiability99.4
Percentage of Assets0.8
Percentage of Assets us-gaap:AccountsPayable mdc:HomebuildingSegment0.0

us-gaap:AccruedLiabilities, mdc:FinancialServicesSegment


Operating
Period End2020-12-31
Value0.7
Percentage of OperatingLeaseLiability2.3
Percentage of Assets0.0
Percentage of Assets us-gaap:AccruedLiabilities mdc:FinancialServicesSegment0.0

us-gaap:OperatingLeaseLiability us-gaap:StatementBusinessSegments

mdc:FinancialServicesSegment


Operating
Period End2021-06-302021-03-312020-09-302020-06-30
Value0.40.60.91.0
Percentage of OperatingLeaseLiability0.00.00.00.0
Percentage of Assets0.00.00.00.0
Percentage of Assets mdc:FinancialServicesSegment0.10.20.30.4

mdc:HomebuildingSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value282930313232303132330.0
Percentage of OperatingLeaseLiability0.00.099.50.00.00.095.897.096.796.80.0
Percentage of Assets0.60.70.80.90.91.00.91.01.01.10.0
Percentage of Assets mdc:HomebuildingSegment0.70.70.90.91.01.01.01.11.11.20.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-312019-12-31
Value3537
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0
Percentage of Assets0.91.1

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value4150000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value233222142119198718731811178217011661161015761532148914321407139013631333132012921277125812561242123612261228122512221209121311801139914880906871868868880933971983107310801476
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets52.350.554.955.053.453.753.453.953.853.152.552.752.351.450.654.253.853.252.252.251.952.752.052.952.652.952.147.447.147.446.746.745.642.745.347.546.947.646.741.638.639.638.644.20.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value168916981407139713591361134813411333131811681162115611461144983915
Percentage of StockholdersEquity72.476.766.470.372.675.275.778.880.381.974.175.977.680.081.374.572.9
Percentage of Assets37.938.736.438.738.840.440.442.543.243.538.940.040.641.141.238.937.9
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value0.7060.7030.6490.6490.6340.6310.6260.6260.6190.6150.5660.5660.5640.5620.5610.5150.489
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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
Value642516711590512449433359327291406369332285258313324
Percentage of StockholdersEquity27.523.333.629.727.424.824.321.119.718.125.824.122.320.018.323.825.8
Percentage of Assets14.411.818.416.314.613.313.011.410.69.613.612.711.710.39.312.413.4
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value706000.0703000.0649000.0649000.0634000.0631000.0626000.0626000.0619000.0615000.0566000.0566000.0564000.0562000.0561000.0519000.0519000.0516000.0515000.0490000.0490000.0490000.0489000.0489000.0489000.0488000.0488000.0488000.0488000.0488000.0488000.0489000.0489000.0489000.0487000.0487000.0480000.0480000.0480000.0475000.0475000.0474000.0472000.0471000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value168916981407139713591361134813411333131811681162115611461144995992985983922921918915916912910909912910909908910907905896865863850839836820802
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets37.938.736.438.738.840.440.442.543.243.538.940.040.641.141.238.839.139.338.937.337.438.537.939.038.839.338.635.335.135.735.036.036.342.346.147.446.440.234.734.132.233.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value6425167115905124494333593272914063693322852583923443233133503363213243133113033073043012922932622261.227-21.2899.9091.8393.198124387127158270
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.411.818.416.314.613.313.011.410.69.613.612.711.710.39.315.313.612.912.414.213.713.513.413.413.213.113.011.811.611.511.310.49.10.1-1.10.50.10.20.72.13.65.26.211.1

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value8.1269.9268.6085.4884.449.7934.1324.2512.4254.8241.251
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value8.1269.9268.6085.4884.449.7934.1324.2512.4254.8241.251
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value70-57.957-52.537-26.26292-37.17390-88.7831.3175451-3.0585.298-61.486-3.692-52.9722794124-79.617-90.825-55.418-58.364-34.8653.223-18.8130.459-11.486-11.556-57.701-71.4941-190.4511
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-4.3-2.510.1-5.28.2-11.50.28.25.8-0.40.7-9.8-0.5-8.84.216.217.0-18.4-22.7-16.7-14.4-10.41.2-10.10.2-5.4-5.4-34.0-27.518.3-58.47.8

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-7.698-5.749-5.892-7.91742-7.018-4.594-10.272-7.485-6.434-6.014-8.52241-6.377-50.257110-0.457-1.5-15.5183718-107.069-14.712-45.31442-3.9532388187105-47.3421-116.38-501.767
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-0.5-0.84.6-1.0-0.4-1.3-1.0-1.0-0.7-1.15.3-1.0-6.918.2-0.1-0.3-2.18.64.5-32.3-3.6-13.616.3-2.19.341.787.161.9-18.29.3-35.7-341.2

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-97.59233639-3.9650.574-5.39639-12.293-10.097-41.9876.021-2.951-20.682-38.797181-18.439-8.63-55.23310-9.936106218-30.62617-5.036-34.856-247.701-265.051-9.57-30.5222.494-65.93548206
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.03.3-0.40.1-0.83.6-1.6-1.3-6.30.7-0.4-2.7-6.225.1-3.1-1.3-9.51.4-2.326.665.7-7.55.3-1.9-18.7-100.2-125.4-4.4-18.01.0-29.215.0140.2

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-35.249272-18.472-38.144135-49.587125-111.348-16.2655.92751-14.53125-106.66127431837
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-1.5-3.714.8-6.911.4-14.4-2.20.95.8-1.83.3-17.017.67.22.86.5

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-1.991-1.3482.1956.5310.8311.1314.1821.7295.0632.696-0.3630.5353.1340.42321126.8133.224.7883.4846.0851.7888.5518.515114.7135.8638.809127.1032.486-2.014
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories us-gaap:RealEstateProperties

us-gaap:IncreaseDecreaseInInventories

mdc:HousingCompletedOrUnderConstruction


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1672186215354178-168.265133120-2.137-119.575-1.9196865-32.449621820-101.2144271115-74.294845-4.282-103.4727847753.04665478.6189.16669045
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:LandAndLandUnderDevelopment


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-1.401-34.978123-13.792-65.867-29.05113934-42.934181546512713017-8.491-29.0316-18.43-54.39-68.3116362-38.1931.2748016-0.972637471934497-21.358-74.048-17.0
Percentage of IncreaseDecreaseInInventories-0.8-16.0197.6-9.0-119.9-16.2-82.726.2-35.6-865.5-129.0-3413.518.9109.4-92.628.3-45.1-139.1-16.3-42.9-76.1-59.2-85.6129.7-83.5-29.8-78.321.4-2.184.72457.4110.2197.5519.51060.0-32.1-81.8-37.1

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value70-57.957-52.537-26.26292-37.17390-88.7831.3175451-3.0585.298-61.486-3.692-52.9722794124-79.617-90.825-55.418-58.364-34.8653.223-18.8130.459-11.486-11.556-57.701-71.4941-190.4511
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-4.3-2.510.1-5.28.2-11.50.28.25.8-0.40.7-9.8-0.5-8.84.216.217.0-18.4-22.7-16.7-14.4-10.41.2-10.10.2-5.4-5.4-34.0-27.518.3-58.47.8

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1541101479884369250544054536338246133224026269.5632214198.42141521113036224222920102.265-18.821-31.71-27.98-19.879-29.974-10.239-3.684-20.873
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.012.09.59.25.18.46.57.36.16.26.88.36.23.410.15.13.85.54.44.62.33.93.24.22.23.03.85.03.66.78.456.26.87.46.04.11.2-7.6-15.0-13.0-11.7-11.5-4.5-1.1-14.2

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value154110988436505440536338
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.09.59.25.16.57.36.16.88.36.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value8.9419.926118.6085.4884.447.8389.7954.1324.2515.5172.4254.8241.2512.7571.0621.4430.5950.8410.4733.1762.9873.4773.9981.7160.8751.2242.2041.2581.2921.4123.0261.8383.3763.5974.9075.112.6113.345.4123.5593.1215.0894.2194.1464.056
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-7.698-5.749-5.892-7.91742-7.018-4.594-10.272-7.485-6.434-6.014-8.52241-6.377-50.257110-0.457-1.5-15.5183718-107.069-14.712-45.31442-3.9532388187105-47.3421-116.38-501.767
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-0.5-0.84.6-1.0-0.4-1.3-1.0-1.0-0.7-1.15.3-1.0-6.918.2-0.1-0.3-2.18.64.5-32.3-3.6-13.616.3-2.19.341.787.161.9-18.29.3-35.7-341.2

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-97.59233639-3.9650.574-5.39639-12.293-10.097-41.9876.021-2.951-20.682-38.797181-18.439-8.63-55.23310-9.936106218-30.62617-5.036-34.856-247.701-265.051-9.57-30.5222.494-65.93548206
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.03.3-0.40.1-0.83.6-1.6-1.3-6.30.7-0.4-2.7-6.225.1-3.1-1.3-9.51.4-2.326.665.7-7.55.3-1.9-18.7-100.2-125.4-4.4-18.01.0-29.215.0140.2

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value28262521202018181817161616161312121212121212121212121212121212601211111111111111111111
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value24.923.3-3.421.50.2440.243-0.0250.1950.2660.2710.0030.2080.1660.2330.0420.3180.3470.388-0.0030.3070.3350.33-0.0220.3750.3730.3680.0050.3540.3670.3830.003
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value25.2424.025.3825.2228.2332.0137.4540.8341.2942.6940.7241.53
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3541514887108157171178193198204202171714121111111313
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value8.4978.5158.5790.5470.5770.4880.9050.3710.5750.9173.1213.3332.7123.50511555259
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-03-312011-12-312011-09-302011-06-302010-12-31
Value4.376.4987.5988.1713121313131314148.2018.2012539238248277281274252231
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:CashContributionCommittedToCharitableFoundation us-gaap:RelatedPartyTransactionsByRelatedParty

mdc:CashContributionCommittedToCharitableFoundation

mdc:MDCRichmondAmericanHomesFoundation


Cash
Period End2021-03-312020-12-31
Value2200000.00
Percentage of CashContributionCommittedToCharitableFoundation100.00.0

mdc:EstimatedCostRelatedToBonds

mdc:EstimatedCostRelatedToBonds


Estimated
Period End2021-06-302021-03-312020-12-31
Value21863.1
Percentage of EstimatedCostRelatedToBonds100.0100.0100.0

mdc:EstimatedCostRelatedToLettersOfCredit

mdc:EstimatedCostRelatedToLettersOfCredit


Estimated
Period End2021-06-302021-03-312020-12-31
Value1712221
Percentage of EstimatedCostRelatedToLettersOfCredit100.0100.0100.0

mdc:GrossMarginPercentage

mdc:GrossMarginPercentage


Gross
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value22.020.520.219.90.1850.1880.1950.1890.1810.1770.1910.1820.1730.1630.1680.1590.1610.1550.1640.1630.1610.1640.1660.1540.1630.1650.1710.1850.1740.1810.1810.1740.1670.1550.1420.1410.150.1480.0890.135
Percentage of GrossMarginPercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:LineOfCreditFacilityLeverageRatioBaseBorrowingRequired us-gaap:Range

mdc:LineOfCreditFacilityLeverageRatioBaseBorrowingRequired

srt:Maximum


Line
Period End2020-12-28
Value55.0
Percentage of LineOfCreditFacilityLeverageRatioBaseBorrowingRequired100.0

mdc:NumeratorForEarningsPerShareDilutedUnderTwoClassMethod

mdc:NumeratorForEarningsPerShareDilutedUnderTwoClassMethod


Numerator
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value15311098833650542214198.39514152111303522322291910
Percentage of NumeratorForEarningsPerShareDilutedUnderTwoClassMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:OperatingLeasesYearlyRentalRatePerRentableSquareFoot us-gaap:LeaseArrangementType, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementScenario

mdc:OperatingLeasesYearlyRentalRatePerRentableSquareFoot

mdc:SubleaseAgreement, mdc:CVenturesInc, us-gaap:ScenarioForecast


Operating
Period End2026-10-312021-11-012021-10-312020-11-012020-10-31
Value31.6729.2628.6829.2628.68
Percentage of OperatingLeasesYearlyRentalRatePerRentableSquareFoot100.0100.0100.0100.0100.0

mdc:OperatingLeasesYearlyRentalRatePerRentableSquareFoot us-gaap:Range, us-gaap:StatementScenario, us-gaap:RelatedPartyTransactionsByRelatedParty

srt:Maximum, srt:ScenarioForecast, mdc:CVenturesInc


Operating
Period End2026-10-312021-10-31
Value31.6728.68
Percentage of OperatingLeasesYearlyRentalRatePerRentableSquareFoot100.0100.0

srt:Minimum, srt:ScenarioForecast, mdc:CVenturesInc


Operating
Period End2021-11-01
Value29.26
Percentage of OperatingLeasesYearlyRentalRatePerRentableSquareFoot100.0

mdc:OperatingLeasesYearlyRentalRatePerRentableSquareFoot us-gaap:StatementScenario, us-gaap:LeaseArrangementType, us-gaap:RelatedPartyTransactionsByRelatedParty

srt:ScenarioForecast, mdc:SubleaseAgreement, mdc:CVenturesInc


Operating
Period End2026-10-312021-11-012021-10-31
Value31.6729.2628.68
Percentage of OperatingLeasesYearlyRentalRatePerRentableSquareFoot100.0100.0100.0

mdc:OperatingLeasesYearlyRentalRatePerRentableSquareFoot us-gaap:StatementScenario, us-gaap:RelatedPartyTransactionsByRelatedParty

srt:ScenarioForecast, mdc:CVenturesInc


Operating
Period End2026-10-312021-11-012021-10-31
Value31.6729.2628.68
Percentage of OperatingLeasesYearlyRentalRatePerRentableSquareFoot100.0100.0100.0

mdc:StockDividendRatePercentage

mdc:StockDividendRatePercentage


Stock
Period End2021-01-252019-01-282017-11-202016-11-21
Value8.00.080.080.05
Percentage of StockDividendRatePercentage100.0100.0100.0100.0

mdc:StockDividendRatePercentage us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Stock
Period End2021-01-252019-01-28
Value8.00.08
Percentage of StockDividendRatePercentage100.0100.0

mdc:UndistributedEarningsReallocatedToParticipatingSecurities

mdc:UndistributedEarningsReallocatedToParticipatingSecurities


Undistributed
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302012-09-30
Value569000.0447000.0775000.0488000.0357000.093000.0452000.0195000.0209000.0136000.0231000.0218000.0201000.0122000.062000.0240000.096000.043000.096000.049000.047000.022000.06000.015000.09000.013000.037000.0446000.0643000.01849000.0136000.0
Percentage of UndistributedEarningsReallocatedToParticipatingSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

us-gaap:RevolvingCreditFacility, mdc:SpecifiedEurocurrencyRate


Debt
Period End2020-12-282018-11-012017-09-29
Value1.00.010.01
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0100.0100.0

us-gaap:RevolvingCreditFacility, us-gaap:FederalFundsEffectiveSwapRate


Debt
Period End2020-12-282018-11-012017-09-29
Value1.50.0150.015
Percentage of DebtInstrumentBasisSpreadOnVariableRate1150.0150.0150.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value9.1757.0038.2857.3546.3755.1527.5765.5375.0634.8785.925.4545.3164.6361.1161.5011.3761.3281.431.3351.2941.0730.9850.9921.0091.0831.00.9950.9990.9340.9040.8880.9941.0781.0581.0521.3491.3071.6581.4961.6271.591.8751.3111.3081.265
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:DerivativeGainLossOnDerivativeNet


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-8100000.09000000.0-200000.01600000.02300000.01000000.0-1600000.0500000.0500000.0900000.0-1000000.0900000.0800000.01500000.0-1200000.0-500000.0200000.0300000.0400000.0100000.0400000.0600000.0900000.0900000.00600000.0-1200000.00100000.0800000.0-1900000.0400000.0600000.0400000.0
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCash

us-gaap:DividendsCash


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2825212020181817161616
Percentage of DividendsCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2825212020181817161616
Percentage of DividendsCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiGainLoss

us-gaap:EquitySecuritiesFvNiGainLoss


Equity
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
Value0.00.04.983-13.2683.8630.7672.3274.84-6.8743.0041.278-1.153
Percentage of EquitySecuritiesFvNiGainLoss0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiRealizedGainLoss

us-gaap:EquitySecuritiesFvNiRealizedGainLoss


Equity
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
Value004983000.0609000.0111000.0299000.00237000.0-50000.0-21000.0-63000.096000.0
Percentage of EquitySecuritiesFvNiRealizedGainLoss0.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfMortgageLoans us-gaap:StatementBusinessSegments

us-gaap:GainLossOnSaleOfMortgageLoans

mdc:FinancialServicesSegment


Gain
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value262326201614121111109.09.8108.510.06.95.63.4
Percentage of GainLossOnSaleOfMortgageLoans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1640-4.697-5.933211.6118.3154.646-13.73513-2.4114.732-0.9443.261135.31.907-7.326-1.255-4.5561015-5.8220.283-5.8496.1410.817-2.588-0.3028.711-5.785-6.9674.5963.97-7.462-4.667.283113.2552.956-1.9810.477-7.294-26.252295.952
Percentage of IncreaseDecreaseInAccountsAndOtherReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value9.0376156-5.51641-1.13142242.607-3.15323109.076.7656.9756.50.7748.0713.722-1.33423-4.23412-1.30416-19.681-16.945-11.16530-18.37169-0.15821-52.0369.822-2.49411-19.107-23.693-8.033-11.729-13.13
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInMortgageLoansHeldForSale

us-gaap:IncreaseDecreaseInMortgageLoansHeldForSale


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-44.703-1.76772-13.06139-63.1807.683-1.473-38.401347.651-5.973-24.95648-5.479-2.09-41.40120-0.7136-33.47747-11.09515-23.68430-0.245-6.423-27.77818-18.1236.034-33.524332010-23.345363.1011.503-27.41716-63.90475-25.611
Percentage of IncreaseDecreaseInMortgageLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-28.289232421-9.6698.460.805-0.3175.291-1.085-12.0837.225.497-0.3891.8923.6275.1952.407-3.5371.5983.886-0.911-0.4244.9543.607-0.489-2.2114.4692.7346.881-1.7456.9241.6876.696-4.9414.509-0.562-3.394
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements us-gaap:AwardType

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:EmployeeStockOption


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2424200.02367400.059543.01810600.01065100.01862600.0167750.01990000.01435700.01217800.0-94538.01055000.0938320.01024800.0492160.0950760.0929810.0249130.0149800.0155540.010392.05473.0-23887.0284320.0237020.0176880.0-15421.0205100.0211720.0268920.0-50235.0275250.0467980.0580190.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PerformanceShares


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-314930.0629860.085536.0145800.00577370.0-19683.00551120.0551120.0255150.00
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements-13.026.6143.78.10.031.0-11.70.038.445.3-269.90.0

us-gaap:InterestCostsCapitalized

us-gaap:InterestCostsCapitalized


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value17171414151615151516151515151513131313131313131313131416161816151413
Percentage of InterestCostsCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsIncurred

us-gaap:InterestCostsIncurred


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value171714141516151515161515151515131313131313131313131314161619161515141010101011141818181818
Percentage of InterestCostsIncurred100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeInterestAndDividend us-gaap:StatementBusinessSegments

us-gaap:InvestmentIncomeInterestAndDividend

mdc:HomebuildingSegment


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.8680.9670.8680.7560.721.8891.5792.3362.7642.3912.1321.9531.7741.859-52.008542.8472.3271.6541.8692.5531.851.2970.838
Percentage of InvestmentIncomeInterestAndDividend100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseCost

us-gaap:LeaseCost


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1956000.01938000.01905000.02045000.02082000.02008000.01841000.01804000.01952000.01943000.0
Percentage of LeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForFuturePolicyBenefitsPaymentForBenefits

us-gaap:LiabilityForFuturePolicyBenefitsPaymentForBenefits


Liability
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value3105000.0334000.01867000.0859000.01155000.01883000.02178000.02614000.02147000.01554000.01311000.0264000.05421000.01595000.01872000.01535000.04589000.01219000.0758000.0635000.01425000.0820000.01825000.02356000.02702000.01728000.0
Percentage of LiabilityForFuturePolicyBenefitsPaymentForBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForFuturePolicyBenefitsPeriodExpense

us-gaap:LiabilityForFuturePolicyBenefitsPeriodExpense


Liability
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value5.3884.2834.8414.0583.5862.9184.3383.1022.7452.4653.3112.8652.7332.3042.8132.3832.3852.1162.3091.8881.9461.3881.9511.6521.5761.2731.7391.531.7371.311.8781.8851.7751.527-7.1551.0370.909-0.6440.5930.6450.587-0.480.9470.8411.231
Percentage of LiabilityForFuturePolicyBenefitsPeriodExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap: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
Value1995000.01977000.01944000.02083000.02120000.02046000.01879000.01841000.01990000.01980000.0
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
Value1887000.01858000.01955000.01792000.01741000.01906000.01858000.01834000.01792000.01771000.0
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted


Participating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value133000.0158000.0179000.0148000.0121000.0135000.0123000.0122000.0110000.0111000.0106000.0106000.096000.0105000.061000.068000.061000.068000.039000.045000.039000.040000.025000.025000.023000.025000.046000.048000.049000.052000.0
Percentage of ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsOfFinancingCosts


Payments
Period End2021-06-302021-03-312017-12-31
Value0819000.035000.0
Percentage of PaymentsOfFinancingCosts0.0100.0100.0

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:PaymentsToAcquireMarketableSecurities


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.00.01.0229.7821.3685.2240.3314.7851.6672.5245.8988.761495.5616.6825.36119129.9445.4826.936121420182725356355716115081104107185752636440-261.6774268453
Percentage of PaymentsToAcquireMarketableSecurities0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireOtherPropertyPlantAndEquipment

us-gaap:PaymentsToAcquireOtherPropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value7.6985.7495.8927.9176.4566.5124.5866.2687.4746.3867.2676.8486.7356.3160.6220.5530.2421.1220.6030.7481.1731.9440.6610.4090.0810.341.3230.5650.8090.5450.5070.280.0720.9260.310.290.3040.3640.14
Percentage of PaymentsToAcquireOtherPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromDebtNetOfIssuanceCosts us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:ProceedsFromDebtNetOfIssuanceCosts

mdc:SeniorNotesDueJanuary2030, us-gaap:SubsequentEvent


Proceeds
Period End2021-01-11
Value347
Percentage of ProceedsFromDebtNetOfIssuanceCosts100.0

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312010-12-312010-09-30
Value0.03470.00.00.02980.00.00.00.00.02480.00.0992470.00.0
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt0.0100.00.00.00.0100.00.00.00.00.00.0100.00.00.0100.0100.00.00.0

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions


Proceeds
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1.009-1.14928-6.8628.194-0.963-1.024107.0870.001
Percentage of ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit


Proceeds
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-52.8011533-40.872597.432-1.817-31.959269.965-9.307-22.21447-4.024-1.415-43.94322-1.28633-28.3944-6.2459.963-20.78529-0.416-7.142-23.734
Percentage of ProceedsFromRepaymentsOfLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities


Proceeds
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302017-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312012-09-302011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.0499.2760.00.00.00.0-83.3150.00.00.01.512.255.32613327452.250.0161023051468.523413948
Percentage of ProceedsFromSaleAndMaturityOfMarketableSecurities0.0100.0100.00.00.00.00.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrualPayments

us-gaap:ProductWarrantyAccrualPayments


Product
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value4.5594.1763.632.6832.3663.6643.5723.4252.9762.4933.0792.7983.1962.53.612.2632.6412.3653.1892.7232.192.9153.4782.7081.6241.72.2261.7581.2370.98211-1.6491.5271.4751.0252.4331.9181.214-2.102-2.707-1.6171.499-1.209-2.944-2.611
Percentage of ProductWarrantyAccrualPayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrualPreexistingIncreaseDecrease

us-gaap:ProductWarrantyAccrualPreexistingIncreaseDecrease


Product
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value92000.0-171000.0-2000000.00240000.0389000.0-1400000.0875000.0307000.0003106000.01716000.0-425000.0050000.02400000.01825000.0250000.02987000.0402000.00-213000.000-525000.0-1275000.0
Percentage of ProductWarrantyAccrualPreexistingIncreaseDecrease100.0100.0100.00.0100.0100.0100.0100.0100.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.00.00.0100.0100.0

us-gaap:ProductWarrantyExpense

us-gaap:ProductWarrantyExpense


Product
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value5.7034.3855.1054.4933.9373.1654.8833.5573.7373.3484.4093.7573.7492.5983.0782.4482.8362.4072.7582.392.3051.4522.3231.5361.3291.1151.4711.2061.2430.9911.9191.3671.1541.1221.0941.4790.878-0.7651.0841.2651.034-0.8410.7071.4032.22
Percentage of ProductWarrantyExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateInventoryCapitalizedInterestCostsCostOfSales1

us-gaap:RealEstateInventoryCapitalizedInterestCostsCostOfSales1


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1814171617122014141318161614181517151915151014121412
Percentage of RealEstateInventoryCapitalizedInterestCostsCostOfSales1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateInventoryCapitalizedInterestCostsIncurred

us-gaap:RealEstateInventoryCapitalizedInterestCostsIncurred


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value171714141516151515161515151515131313131313131313131314161618161514131010109.7851010109.5199.0649.378.849
Percentage of RealEstateInventoryCapitalizedInterestCostsIncurred100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLinesOfCredit us-gaap:DebtInstrument

us-gaap:RepaymentsOfLinesOfCredit

mdc:MortgageRepurchaseFacility


Repayments
Period End2020-09-302019-09-30
Value11-7.432
Percentage of RepaymentsOfLinesOfCredit100.0100.0

us-gaap:RepaymentsOfSeniorDebt

us-gaap:RepaymentsOfSeniorDebt


Repayments
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312014-12-312014-09-302014-06-302014-03-312011-12-31
Value0.00.00.02500.0-0.02580.00.0259282
Percentage of RepaymentsOfSeniorDebt0.00.00.0100.00.00.0100.00.00.0100.0100.0

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
Value0830000.0001405000.02645000.0579000.0646000.0553000.01477000.0
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability0.0100.00.00.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardDate, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

mdc:August202020, us-gaap:PerformanceShares


Share
Period End2021-03-312020-12-31
Value39.791.08
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0

mdc:August52019, us-gaap:PerformanceShares


Share
Period End2021-03-312020-12-312020-09-30
Value30.1900
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue75.90.00.0

mdc:June202017, us-gaap:PerformanceShares


Share
Period End2021-03-312020-12-312020-09-30
Value25.7700
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue64.80.00.0

mdc:May232018, us-gaap:PerformanceShares


Share
Period End2021-03-312020-12-312020-09-30
Value23.6800
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue59.50.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardDate, us-gaap:AwardType, us-gaap:PlanName, us-gaap:SubsequentEventType

mdc:GrantedIn2021, us-gaap:PerformanceShares, mdc:EquityIncentivePlan2011, us-gaap:SubsequentEvent


Share
Period End2021-07-14
Value44.35
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-16.5431.00928-6.8628.194-1.023107.0874.0245.5530.282
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-16.5461.00728-6.8658.189-1.03107.0834.0225.5510.281
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.099.899.9100.099.9100.7100.099.9100.0100.099.6

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.0030.0020.0150.0030.0050.0070.0040.0040.0020.0020.001
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation-0.00.20.1-0.00.1-0.70.00.10.00.00.4

us-gaap:StockIssuedDuringPeriodValueStockDividend

us-gaap:StockIssuedDuringPeriodValueStockDividend


Stock
Period End2021-03-312019-03-31
Value-0.687-0.096
Percentage of StockIssuedDuringPeriodValueStockDividend100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockDividend us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-03-312019-03-31
Value279138
Percentage of StockIssuedDuringPeriodValueStockDividend-40695.6-144739.6

us-gaap:CommonStock


Stock
Period End2021-03-312019-03-31
Value0.0520.045
Percentage of StockIssuedDuringPeriodValueStockDividend-7.6-46.9

us-gaap:RetainedEarnings


Stock
Period End2021-03-312019-03-31
Value-280.318-139.091
Percentage of StockIssuedDuringPeriodValueStockDividend40803.2144886.5

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
Value39000.039000.039000.038000.038000.038000.038000.037000.038000.037000.0
Percentage of SubleaseIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic


Undistributed
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-312014-09-302014-06-30
Value589000.0463000.0796000.0502000.0363000.096000.0466000.0202000.0213000.0139000.0233000.0222000.0204000.0124000.066000.0244000.098000.043000.096000.049000.047000.022000.06000.015000.09000.013000.037000.0
Percentage of UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted


Undistributed
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302013-12-312013-09-302013-06-30
Value-589000.0-463000.0-796000.0-502000.0-363000.0-96000.0-466000.0-202000.0-213000.0-139000.0-233000.0-222000.0-204000.0-124000.0-66000.0-244000.0-98000.0-43000.0-96000.0-49000.0-47000.0-22000.0-6000.0-15000.0-111000.013000.037000.0-7526000.0294000.02069000.0
Percentage of UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:AccruedContributionCommittedToCharitableFoundation us-gaap:RelatedPartyTransactionsByRelatedParty

mdc:AccruedContributionCommittedToCharitableFoundation

mdc:MDCRichmondAmericanHomesFoundation


Accrued
Period End2020-12-31
Value2200000.0
Percentage of AccruedContributionCommittedToCharitableFoundation100.0

mdc:ConstructionDefectClaimReserve us-gaap:StatementBusinessSegments

mdc:ConstructionDefectClaimReserve

mdc:HomebuildingSegment


Construction
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value8353000.08744000.08479000.08479000.08393000.08318000.08196000.08379000.08569000.08367000.08464000.08388000.08084000.07944000.08406000.07480000.08750000.0
Percentage of ConstructionDefectClaimReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:DebtInstrumentCovenantMaximumLeverageRatioBaseBorrowingRequired us-gaap:CreditFacility

mdc:DebtInstrumentCovenantMaximumLeverageRatioBaseBorrowingRequired

us-gaap:RevolvingCreditFacility


Debt
Period End2020-12-28
Value55.0
Percentage of DebtInstrumentCovenantMaximumLeverageRatioBaseBorrowingRequired100.0

mdc:DebtInstrumentCovenantMinimumCommonStockOutstandingOwnershipPercentage us-gaap:CreditFacility

mdc:DebtInstrumentCovenantMinimumCommonStockOutstandingOwnershipPercentage

us-gaap:RevolvingCreditFacility


Debt
Period End2020-09-30
Value50.0
Percentage of DebtInstrumentCovenantMinimumCommonStockOutstandingOwnershipPercentage100.0

mdc:LandDevelopmentAndHomeConstructionAccruals us-gaap:StatementBusinessSegments

mdc:LandDevelopmentAndHomeConstructionAccruals

mdc:HomebuildingSegment


Land
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value1512108.638.1258.8629.758.4729.3459.0648.6837.6837.397.3378.0018.695
Percentage of LandDevelopmentAndHomeConstructionAccruals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:LandOptionDeposits us-gaap:StatementBusinessSegments

mdc:LandOptionDeposits

mdc:HomebuildingSegment


Land
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value3737292519272723262123322818221615118.6837.3611
Percentage of LandOptionDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:LesseeOperatingLeaseLiabilityInterest

mdc:LesseeOperatingLeaseLiabilityInterest


Lessee
Period End2020-12-312019-12-31
Value4854000.05290000.0
Percentage of LesseeOperatingLeaseLiabilityInterest100.0100.0

mdc:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour

mdc:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour


Lessee
Period End2020-12-312019-12-31
Value4.86910
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour100.0100.0

mdc:LineOfCreditFacilityMaximumIncreaseToBorrowingCapacity us-gaap:CreditFacility, us-gaap:ShortTermDebtType

mdc:LineOfCreditFacilityMaximumIncreaseToBorrowingCapacity

mdc:MortgageRepurchaseFacility, us-gaap:WarehouseAgreementBorrowings


Line
Period End2021-04-222021-02-042020-03-302018-12-272018-12-262018-08-092018-06-262018-06-252018-03-272017-12-262017-08-10
Value17520011013075757575757575
Percentage of LineOfCreditFacilityMaximumIncreaseToBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:LineOfCreditFacilityMaximumIncreaseToBorrowingCapacity us-gaap:StatementScenario, us-gaap:CreditFacility, us-gaap:ShortTermDebtType

srt:ScenarioForecast, mdc:MortgageRepurchaseFacility, us-gaap:WarehouseAgreementBorrowings


Line
Period End2022-04-21
Value150
Percentage of LineOfCreditFacilityMaximumIncreaseToBorrowingCapacity0.0

mdc:LineOfCreditFacilityOutstandingExtendedMaturityAmount us-gaap:CreditFacility

mdc:LineOfCreditFacilityOutstandingExtendedMaturityAmount

us-gaap:RevolvingCreditFacility


Line
Period End2020-12-28
Value1125
Percentage of LineOfCreditFacilityOutstandingExtendedMaturityAmount100.0

mdc:LoansReceivableHeldForSaleMortgageUnpaidPrincipalBalance

mdc:LoansReceivableHeldForSaleMortgageUnpaidPrincipalBalance


Loans
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value222191143133136
Percentage of LoansReceivableHeldForSaleMortgageUnpaidPrincipalBalance100.0100.0100.0100.0100.0

mdc:MaximumRemainingExpenseToBeRecognized us-gaap:AwardDate, us-gaap:AwardType

mdc:MaximumRemainingExpenseToBeRecognized

mdc:August202020, us-gaap:PerformanceShares


Maximum
Period End2021-03-312020-12-312020-09-30
Value192322
Percentage of MaximumRemainingExpenseToBeRecognized100.0100.0100.0

mdc:August52019, us-gaap:PerformanceShares


Maximum
Period End2021-03-312020-12-312020-09-302020-06-30
Value5.5057.341317
Percentage of MaximumRemainingExpenseToBeRecognized27.931.659.20.0

mdc:May232018, us-gaap:PerformanceShares


Maximum
Period End2020-12-312020-09-302020-06-30
Value1.3072.6153.922
Percentage of MaximumRemainingExpenseToBeRecognized5.611.60.0

mdc:NotionalAmountOfForwardRateCommitmentsAndFuturesContractsToHedgeAgainstMortgageServicingRights us-gaap:DerivativeInstrumentRisk

mdc:NotionalAmountOfForwardRateCommitmentsAndFuturesContractsToHedgeAgainstMortgageServicingRights

mdc:CommitmentToOriginateMortgageLoans


Notional
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value306490254233221155148149152191132101110122105122122
Percentage of NotionalAmountOfForwardRateCommitmentsAndFuturesContractsToHedgeAgainstMortgageServicingRights100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mdc:ForwardSalesOfMortgageBackedSecurities


Notional
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value18932020120516213110512110211010485106104888580
Percentage of NotionalAmountOfForwardRateCommitmentsAndFuturesContractsToHedgeAgainstMortgageServicingRights61.965.478.988.273.384.870.881.067.457.479.084.095.885.183.669.265.6

mdc:SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceAwardMaximumPotentialExposure us-gaap:AwardDate, us-gaap:AwardType

mdc:SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceAwardMaximumPotentialExposure

mdc:August202020, us-gaap:PerformanceShares


Sharebased
Period End2021-03-312020-12-312020-09-30
Value232322
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceAwardMaximumPotentialExposure100.0100.0100.0

mdc:July252016, us-gaap:PerformanceShares


Sharebased
Period End2020-12-312020-09-302020-06-302019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value10101010834000101010101010101010
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceAwardMaximumPotentialExposure46.747.90.00.00.00.00.00.00.00.00.00.00.0

mdc:June202017, us-gaap:PerformanceShares


Sharebased
Period End2021-03-312020-12-312020-09-302020-06-302019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1616161616070000161616161616161515
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceAwardMaximumPotentialExposure69.369.371.00.00.00.00.00.00.00.00.00.00.00.0

mdc:May232018, us-gaap:PerformanceShares


Sharebased
Period End2021-03-312020-12-312020-09-302020-06-302019-09-302019-06-30
Value141414141491500014
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceAwardMaximumPotentialExposure64.364.365.90.00.00.0

mdc:SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceAwardThresholdGoalRevenue us-gaap:AwardDate, us-gaap:AwardType

mdc:SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceAwardThresholdGoalRevenue

mdc:July252016, us-gaap:PerformanceShares


Sharebased
Period End2020-12-312020-09-302020-06-30
Value207320732074
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceAwardThresholdGoalRevenue100.0100.0100.0

mdc:StockDividendRatePerSharesOwnedNumber us-gaap:SubsequentEventType

mdc:StockDividendRatePerSharesOwnedNumber

us-gaap:SubsequentEvent


Stock
Period End2021-01-25
Value12.5
Percentage of StockDividendRatePerSharesOwnedNumber100.0

mdc:SuretyBondsOutstandingAmount

mdc:SuretyBondsOutstandingAmount


Surety
Period End2021-06-302021-03-312020-12-312020-09-30
Value295306261256
Percentage of SuretyBondsOutstandingAmount100.0100.0100.0100.0

mdc:SuretyBondsOutstandingAmount us-gaap:LineOfCreditFacility

mdc:HomeAmerican


Surety
Period End2021-06-302021-03-312020-12-312020-09-30
Value114108102100
Percentage of SuretyBondsOutstandingAmount38.635.239.139.4

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent us-gaap:StatementBusinessSegments

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent

mdc:FinancialServicesSegment


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value9910195847070686260585854535453514951505652
Percentage of AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableAndOtherAccruedLiabilities us-gaap:StatementBusinessSegments

us-gaap:AccountsPayableAndOtherAccruedLiabilities

mdc:FinancialServicesSegment


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value31363425141716131211119.927108.5678.8218.6818.1688.0428.538.7816.303
Percentage of AccountsPayableAndOtherAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableCurrentAndNoncurrent us-gaap:StatementBusinessSegments

us-gaap:AccountsPayableCurrentAndNoncurrent

mdc:HomebuildingSegment


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value135120981039597877958585052525339494852425440
Percentage of AccountsPayableCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableNet us-gaap:StatementBusinessSegments

us-gaap:AccountsReceivableNet

mdc:HomebuildingSegment


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value13310772908869655854675256545253423736424323
Percentage of AccountsReceivableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedIncomeTaxes us-gaap:StatementBusinessSegments

us-gaap:AccruedIncomeTaxes

mdc:HomebuildingSegment


Accrued
Period End2021-06-302021-03-312020-12-31
Value6.468438.285
Percentage of AccruedIncomeTaxes100.0100.0100.0

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent us-gaap:StatementBusinessSegments

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent

mdc:HomebuildingSegment


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value330333300259278233245189186185196175168155166151148141144122122
Percentage of AccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


Cash
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value503560424474348459476470418433407514386343324286184
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockCapitalSharesReservedForFutureIssuance us-gaap:AwardType, us-gaap:PlanName

us-gaap:CommonStockCapitalSharesReservedForFutureIssuance

us-gaap:EmployeeStockOption, mdc:EquityIncentivePlan2011


Common
Period End2020-12-312019-12-31
Value7100000.08600000.0
Percentage of CommonStockCapitalSharesReservedForFutureIssuance100.0100.0

us-gaap:CommonStockCapitalSharesReservedForFutureIssuance us-gaap:PlanName

mdc:DirectorStockOptionPlan2011


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value600000.0800000.01000000.01000000.01200000.01100000.0800000.0800000.0
Percentage of CommonStockCapitalSharesReservedForFutureIssuance8.59.30.00.00.00.00.00.0

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerAssetNet


Contract
Period End2020-12-312019-12-312018-12-312018-09-302018-06-302018-03-312018-01-01
Value49463437303232
Percentage of ContractWithCustomerAssetNet100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiability us-gaap:StatementBusinessSegments

us-gaap:ContractWithCustomerLiability

mdc:HomebuildingSegment


Contract
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
Value848267594343394842363436
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value138413841037103710371036989989988988987987987986986842842841841841841840840846846846846109610961095109510951095995744744744
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:DebtInstrument

mdc:SeniorNotes2500DueJanuary2031


Debt
Period End2021-06-302021-03-31
Value346346
Percentage of DebtInstrumentCarryingAmount25.125.1

mdc:SeniorNotes3Point850PercentDueJanuary2030


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value2972972972972970.0
Percentage of DebtInstrumentCarryingAmount21.521.528.728.728.70.0

mdc:SeniorNotes5Point5PercentDueJanuary2024


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value249249249249249249249248248248248248248248248248248248248
Percentage of DebtInstrumentCarryingAmount18.018.024.024.024.024.025.225.225.225.225.225.225.225.225.229.529.529.529.5

mdc:SeniorNotes6PercentDueJanuary2043


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value4904904904904900.4905550.490508490490490490490490490490346346346346
Percentage of DebtInstrumentCarryingAmount35.435.447.347.347.30.00.049.649.649.649.649.649.749.749.741.141.141.141.2

us-gaap:DebtInstrumentCarryingAmount us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis

mdc:SeniorNotes2500DueJanuary2031, us-gaap:CarryingReportedAmountFairValueDisclosure


Debt
Period End2021-06-302021-03-31
Value346346
Percentage of DebtInstrumentCarryingAmount25.125.1

mdc:SeniorNotes3850DueJanuary2030, us-gaap:CarryingReportedAmountFairValueDisclosure


Debt
Period End2020-12-312020-09-302020-06-302019-12-31
Value2972972970.0
Percentage of DebtInstrumentCarryingAmount28.728.728.70.0

mdc:SeniorNotes3Point850PercentDueJanuary2030, us-gaap:CarryingReportedAmountFairValueDisclosure


Debt
Period End2021-06-302021-03-312020-12-31
Value297297297
Percentage of DebtInstrumentCarryingAmount21.521.528.7

mdc:SeniorNotes5Point5PercentDueJanuary2024, us-gaap:CarryingReportedAmountFairValueDisclosure


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value249249249249249249249248248248248248248248248248
Percentage of DebtInstrumentCarryingAmount18.018.024.024.024.024.025.225.225.225.225.225.225.225.225.229.5

mdc:SeniorNotes6PercentDueJanuary2043, us-gaap:CarryingReportedAmountFairValueDisclosure


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value490490490490490490490490490490490490490490490346
Percentage of DebtInstrumentCarryingAmount35.435.447.347.347.347.349.649.649.649.649.649.649.749.749.741.2

us-gaap:DebtInstrumentCarryingAmount us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value138413841037103710371036989989988988987987987986986841
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:DebtInstrumentFaceAmount

mdc:SeniorNotesDueJanuary2030, us-gaap:SubsequentEvent


Debt
Period End2021-01-112020-01-09
Value350300
Percentage of DebtInstrumentFaceAmount100.0100.0

us-gaap:DebtInstrumentFairValue us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis

us-gaap:DebtInstrumentFairValue

mdc:SeniorNotes2500DueJanuary2031, us-gaap:EstimateOfFairValueFairValueDisclosure


Debt
Period End2021-06-302021-03-31
Value326332
Percentage of DebtInstrumentFairValue100.0100.0

mdc:SeniorNotes3850DueJanuary2030, us-gaap:EstimateOfFairValueFairValueDisclosure


Debt
Period End2020-12-312020-09-302020-06-302019-12-31
Value3313132890.0
Percentage of DebtInstrumentFairValue0.00.00.00.0

mdc:SeniorNotes3Point850PercentDueJanuary2030, us-gaap:EstimateOfFairValueFairValueDisclosure


Debt
Period End2021-06-302021-03-312020-12-31
Value322314331
Percentage of DebtInstrumentFairValue98.894.80.0

mdc:SeniorNotes5Point5PercentDueJanuary2024, us-gaap:EstimateOfFairValueFairValueDisclosure


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value274275275270266228272274267258242251251254263258
Percentage of DebtInstrumentFairValue84.182.90.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mdc:SeniorNotes6PercentDueJanuary2043, us-gaap:EstimateOfFairValueFairValueDisclosure


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value639628667605527466528516467434386428430464493297
Percentage of DebtInstrumentFairValue195.7189.20.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DebtInstrumentFairValue us-gaap:FairValueByMeasurementBasis

us-gaap:EstimateOfFairValueFairValueDisclosure


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value15621550127411891084965105110429879468829369389771018821
Percentage of DebtInstrumentFairValue478.7466.80.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:DebtInstrumentUnamortizedDiscount

mdc:SeniorNotesDueJanuary2030, us-gaap:SubsequentEvent


Debt
Period End2021-01-11
Value2300000.0
Percentage of DebtInstrumentUnamortizedDiscount100.0

us-gaap:DeferredIncomeTaxAssetsNet us-gaap:StatementBusinessSegments

us-gaap:DeferredIncomeTaxAssetsNet

mdc:HomebuildingSegment


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1412111319202127293437
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302013-12-312011-12-312010-12-31
Value2319137.375129.803161618200.810
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredOfferingCosts us-gaap:StatementBusinessSegments

us-gaap:DeferredOfferingCosts

mdc:HomebuildingSegment


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value8.0748.5299.0434.985.3635.7466.136.5136.8967.2797.6625.035.3265.6225.886.1393.7864.0634.344.7215.57
Percentage of DeferredOfferingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value39475857101121170186193201207229242255265278286288292285265245
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsInventory

us-gaap:DeferredTaxAssetsInventory


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value8938000.07228000.05863000.04260000.06498000.05894000.03257000.03183000.01914000.07021000.07064000.06504000.04450000.04022000.03930000.03833000.03466000.03466000.03466000.03264000.05368000.05368000.0
Percentage of DeferredTaxAssetsInventory100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value5.739101825263136404142404647484952535353514947
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3441000.0910000.01680000.01887000.02993000.02429000.01806000.04030000.04070000.03986000.03446000.02976000.01703000.01627000.02063000.01606000.01593000.01541000.01522000.01228000.01761000.01773000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2.9582.5922.6220.6997.337.2416.4424.9574.3131.82311
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4.546101110182022262525263029282928272626262522
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1.4163.5265.8483.7386.4565.0492.7854.7284.0994.9655.8897.1718.984111420242731353846
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312011-09-302011-06-302010-12-31
Value12121210149.4712121415151515141418232427
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value5102000.03764000.03261000.02380000.02583000.02081000.01624000.01545000.01461000.01665000.01535000.01375000.01400000.01385000.04385000.04373000.04350000.04350000.04336000.04877000.04308000.04273000.0
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value119.5518.443.7054.2764.7395.0255.1615.2425.4225.5125.586.1645.7145.7534.441.0130.8040.706
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome


Deferred
Period End2020-12-312019-12-312018-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value7144000.03359000.01817000.01400000.02312000.04306000.04148000.03715000.03110000.03985000.03751000.03426000.02974000.03796000.03445000.06420000.05959000.05589000.05591000.05731000.06401000.0
Percentage of DeferredTaxLiabilitiesTaxDeferredIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Deposits us-gaap:OtherCommitments

us-gaap:Deposits

mdc:OptionContracts


Depositsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-30
Value33332522
Percentage of Deposits100.0100.0100.0100.0

us-gaap:DerivativeAverageFixedInterestRate us-gaap:FinancialInstrument

us-gaap:DerivativeAverageFixedInterestRate

us-gaap:InterestRateLockCommitments


Derivative
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value2.690.03720.04780.04150.04110.03820.03690.0413
Percentage of DerivativeAverageFixedInterestRate100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeNotionalAmount

us-gaap:DerivativeNotionalAmount


Derivative
Period End2020-12-312019-12-312018-12-31
Value20310865
Percentage of DerivativeNotionalAmount100.0100.0100.0

us-gaap:DerivativeNotionalAmount us-gaap:FinancialInstrument

us-gaap:InterestRateLockCommitments


Derivative
Period End2020-12-312019-12-312018-12-31
Value230104101
Percentage of DerivativeNotionalAmount113.596.3154.4

us-gaap:DueToRelatedPartiesCurrentAndNoncurrent us-gaap:ConsolidatedEntities

us-gaap:DueToRelatedPartiesCurrentAndNoncurrent

srt:NonGuarantorSubsidiaries


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value656565656524
Percentage of DueToRelatedPartiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0

us-gaap:EarnestMoneyDeposits

us-gaap:EarnestMoneyDeposits


Earnest
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value15146.48.83.83.82.82.21.9
Percentage of EarnestMoneyDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrentAndNoncurrent us-gaap:StatementBusinessSegments

us-gaap:EmployeeRelatedLiabilitiesCurrentAndNoncurrent

mdc:HomebuildingSegment


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value544156483426453525223935251932272016272425
Percentage of EmployeeRelatedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:RestrictedStock


Employee
Period End2020-12-312016-12-312015-12-312012-12-31
Value6.62.51.09.6
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

us-gaap:EmployeeStockOption


Employee
Period End2020-12-31
Value4900000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions100.0

us-gaap:InterestPayableCurrentAndNoncurrent us-gaap:StatementBusinessSegments

us-gaap:InterestPayableCurrentAndNoncurrent

mdc:HomebuildingSegment


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value321627132714271327132713271327112311231123
Percentage of InterestPayableCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryHomesUnderConstruction

us-gaap:InventoryHomesUnderConstruction


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value187217051486142312701036933862747821774728732836758712636512300333336345372260
Percentage of InventoryHomesUnderConstruction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryHomesUnderConstruction us-gaap:StatementBusinessSegments

mdc:HomebuildingSegment


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value187217051486142312701215103612041071950952107310771009936969909890874976747
Percentage of InventoryHomesUnderConstruction100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0

us-gaap:InventoryHomesUnderConstruction us-gaap:StatementBusinessSegments, us-gaap:Subsegments

mdc:HomebuildingSegment, mdc:ReportableSegmentEast


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value2001391191151101058898887782100109120118136136137125135127
Percentage of InventoryHomesUnderConstruction10.78.28.08.18.70.08.60.00.00.00.00.00.00.00.00.00.00.00.00.017.1

mdc:HomebuildingSegment, mdc:ReportableSegmentMountain


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value608547464463418411358415381356347400396357328343308299277306253
Percentage of InventoryHomesUnderConstruction32.532.131.232.633.00.034.60.00.00.00.00.00.00.00.00.00.00.00.00.033.9

mdc:HomebuildingSegment, mdc:ReportableSegmentWest


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value10641018902844741699589689600516521572571531489489464454470534365
Percentage of InventoryHomesUnderConstruction56.859.760.759.358.30.056.80.00.00.00.00.00.00.00.00.00.00.00.00.049.0

us-gaap:InventoryRealEstateLandAndLandDevelopmentCosts

us-gaap:InventoryRealEstateLandAndLandDevelopmentCosts


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1309131013451221123513308939481016957898936935854837838774489505517524488415262
Percentage of InventoryRealEstateLandAndLandDevelopmentCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryRealEstateLandAndLandDevelopmentCosts us-gaap:StatementBusinessSegments

mdc:HomebuildingSegment


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value1309131013451221123513011330119111561198118010349779648938638468558848701016
Percentage of InventoryRealEstateLandAndLandDevelopmentCosts100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0

us-gaap:InventoryRealEstateLandAndLandDevelopmentCosts us-gaap:StatementBusinessSegments, us-gaap:Subsegments

mdc:HomebuildingSegment, mdc:ReportableSegmentEast


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value1451411321119092897584787267555566677995114130176
Percentage of InventoryRealEstateLandAndLandDevelopmentCosts11.110.89.89.17.30.06.70.00.00.00.00.00.00.00.00.00.00.00.00.017.4

mdc:HomebuildingSegment, mdc:ReportableSegmentMountain


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value325380391412425448468417398420402358308322309305292289271252259
Percentage of InventoryRealEstateLandAndLandDevelopmentCosts24.829.129.133.734.40.035.20.00.00.00.00.00.00.00.00.00.00.00.00.025.5

mdc:HomebuildingSegment, mdc:ReportableSegmentWest


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value838788822698719760772697672699705607613586517489475470499487580
Percentage of InventoryRealEstateLandAndLandDevelopmentCosts64.060.261.157.158.20.058.00.00.00.00.00.00.00.00.00.00.00.00.00.057.1

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-312019-12-31
Value6773000.07421000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2020-12-312019-12-31
Value5051000.01343000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:LettersOfCreditOutstandingAmount


Letters
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312011-12-31
Value15114512712687969893898990717266536564525258705861492725263437323030301720
Percentage of LettersOfCreditOutstandingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LettersOfCreditOutstandingAmount us-gaap:CreditFacility

us-gaap:RevolvingCreditFacility


Letters
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3737252525252326262727
Percentage of LettersOfCreditOutstandingAmount24.925.719.720.129.526.623.828.429.030.930.7

us-gaap:LettersOfCreditOutstandingAmount us-gaap:LineOfCreditFacility

mdc:HomeAmerican


Letters
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value10062707566636162413936213131272932
Percentage of LettersOfCreditOutstandingAmount79.970.573.476.271.671.069.169.258.354.655.640.448.249.252.656.355.3

us-gaap:LettersOfCreditOutstandingAmount us-gaap:OtherCommitments

mdc:OptionContracts


Letters
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value109.67.37.67.48.26.25.44.54.87.08.26.05.43.63.12.12.42.72.72.82.42.52.83.43.03.7
Percentage of LettersOfCreditOutstandingAmount7.26.65.76.08.48.56.35.85.05.47.711.58.38.15.54.84.04.13.84.65.68.89.78.09.19.312.3

us-gaap:LiabilityForUncertainTaxPositionsCurrent

us-gaap:LiabilityForUncertainTaxPositionsCurrent


Liability
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value9.38.9100.50.40.40.80.30.8
Percentage of LiabilityForUncertainTaxPositionsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCredit us-gaap:CreditFacility

us-gaap:LineOfCredit

us-gaap:RevolvingCreditFacility


Line
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value10.010.010.010.010.015151515151515151515151515151515151515151510.010.00.0
Percentage of LineOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:LineOfCredit us-gaap:StatementBusinessSegments

mdc:HomebuildingSegment


Line
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value10.010.010.010.010.015151515151515151515151515151515
Percentage of LineOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:RevolvingCreditFacility


Line
Period End2021-06-302021-03-312020-12-312020-09-30
Value115011501160964
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0100.0100.0100.0

us-gaap:LitigationReserve

us-gaap:LitigationReserve


Litigation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1.61.61.62.71.93.63.15.92.39.414
Percentage of LitigationReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansReceivableHeldForSaleNetNotPartOfDisposalGroup

us-gaap:LoansReceivableHeldForSaleNetNotPartOfDisposalGroup


Loans
Period End2020-12-312019-12-312018-12-31
Value915817
Percentage of LoansReceivableHeldForSaleNetNotPartOfDisposalGroup100.0100.0100.0

us-gaap:LoansReceivableHeldForSaleNetNotPartOfDisposalGroup us-gaap:DerivativeInstrumentRisk

mdc:NoCommitmentToOriginateMortgageLoans


Loans
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value6465538543141114
Percentage of LoansReceivableHeldForSaleNetNotPartOfDisposalGroup0.00.00.00.00.00.00.00.0

us-gaap:LoansReceivableHeldForSaleNetNotPartOfDisposalGroup us-gaap:MortgageLoansOnRealEstateLoanType, us-gaap:FairValueByFairValueHierarchyLevel

mdc:NotUnderCommitmentToSell, us-gaap:FairValueInputsLevel2


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value6766955589456015121418
Percentage of LoansReceivableHeldForSaleNetNotPartOfDisposalGroup0.00.0104.60.00.00.0102.90.00.00.0103.9

mdc:UnderCommitmentToSell, us-gaap:FairValueInputsLevel2


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value11816413710584881361019796130
Percentage of LoansReceivableHeldForSaleNetNotPartOfDisposalGroup0.00.0150.70.00.00.0233.80.00.00.0734.8

us-gaap:LoansReceivableHeldForSaleNetNotPartOfDisposalGroup us-gaap:StatementBusinessSegments

mdc:FinancialServicesSegment


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value186230232160173133197117109110149
Percentage of LoansReceivableHeldForSaleNetNotPartOfDisposalGroup0.00.0255.30.00.00.0336.80.00.00.0838.3

us-gaap:MortgagesHeldForSaleFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:MortgagesHeldForSaleFairValueDisclosure

us-gaap:FairValueInputsLevel2


Mortgages
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
Value232160173133197117109110149114107113138
Percentage of MortgagesHeldForSaleFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MortgagesHeldForSaleFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Mortgages
Period End2021-06-302021-03-312020-12-31
Value186230232
Percentage of MortgagesHeldForSaleFairValueDisclosure0.00.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312017-12-31
Value5.71025
Percentage of OperatingLossCarryforwards100.0100.0100.0

us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent us-gaap:StatementBusinessSegments

us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent

mdc:HomebuildingSegment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value656566569369544442464941293931413950362926
Percentage of OtherAccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PrepaidExpenseAndOtherAssets us-gaap:StatementBusinessSegments

us-gaap:PrepaidExpenseAndOtherAssets

mdc:HomebuildingSegment


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value98107101786978784647424552453875726763606665
Percentage of PrepaidExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PrepaidExpenseCurrentAndNoncurrent us-gaap:StatementBusinessSegments

us-gaap:PrepaidExpenseCurrentAndNoncurrent

mdc:HomebuildingSegment


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value182626106.0846.9977.2948.6887.2386.6147.3248.0294.3285.6156.1286.0113.7134.4784.7357.5396.5
Percentage of PrepaidExpenseCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrual

us-gaap:ProductWarrantyAccrual


Product
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3533333230303129292928262525212020202018171615161717181920212222222323232425252831333459
Percentage of ProductWarrantyAccrual100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrual us-gaap:StatementBusinessSegments

mdc:HomebuildingSegment


Product
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value353333323030312929292826252521202020201815
Percentage of ProductWarrantyAccrual100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateInventoryCapitalizedInterestCosts

us-gaap:RealEstateInventoryCapitalizedInterestCosts


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value545552555659555958565457585857606266687477797779787979828080747474726969676358544943383632312839
Percentage of RealEstateInventoryCapitalizedInterestCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalents us-gaap:StatementBusinessSegments

us-gaap:RestrictedCashAndCashEquivalents

mdc:HomebuildingSegment


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value1417151915151416128.1366.3637.8667.4436.1988.8128.7235.0274.2293.7784.6213.75
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SelfInsuranceReserve

us-gaap:SelfInsuranceReserve


Self
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value76747067636160575656555350535250495150484646454647505049494949494748474445444951
Percentage of SelfInsuranceReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SelfInsuranceReserve us-gaap:StatementBusinessSegments

mdc:FinancialServicesSegment


Self
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value676561585553524848474644424544434143424845
Percentage of SelfInsuranceReserve89.188.287.987.486.986.586.485.484.985.184.784.384.185.184.085.284.083.682.8100.0100.0

us-gaap:SeniorNotes us-gaap:StatementBusinessSegments

us-gaap:SeniorNotes

mdc:HomebuildingSegment


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value138413841037103710371036989989988988987987987986986842842841841841840
Percentage of SeniorNotes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value38.8230.5427.6625.823.1529.7932.2732.8731.6933.1936.1536.84
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:EmployeeStockOption, mdc:EquityIncentivePlan2011


Share
Period End2020-12-312019-12-31
Value1100000.01800000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap:PlanName

mdc:DirectorStockOptionPlan2011


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value500000.0500000.0500000.0600000.0600000.0600000.0400000.0600000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant45.527.80.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice


Share
Period End2020-12-312012-12-312011-12-31
Value24.1748.8346.15
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue


Share
Period End2020-12-31
Value94
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice


Share
Period End2020-12-31
Value25.24
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested

us-gaap:RestrictedStock


Sharebased
Period End2020-12-31
Value18
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1


Sharebased
Period End2020-12-31
Value78
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value8.387.26.766.225.55.919.519.58.6310.7412.65
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value24.1722.7524.9825.2428.9633.8838.3142.8448.8346.15
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

mdc:ExercisePriceRangeFive


Sharebased
Period End2020-12-312016-12-312012-12-31
Value35.5538.0467.17
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1147.1131.4137.6

mdc:ExercisePriceRangeFour


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312012-12-31
Value32.3732.3730.6230.9431.8260.41
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1133.9142.3122.6122.6109.9123.7

mdc:ExercisePriceRangeOne


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312012-12-31
Value19.7719.919.2519.1319.9522.12
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice181.887.577.175.868.945.3

mdc:ExercisePriceRangeThree


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312012-12-31
Value28.0626.7825.6225.828.1643.84
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1116.1117.7102.6102.297.289.8

mdc:ExercisePriceRangeTwo


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312012-12-31
Value23.1423.1721.7221.7223.2533.61
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice195.7101.886.986.180.368.8

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value25.2424.025.3825.2228.2332.0137.4540.8341.2942.69
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

mdc:ExercisePriceRangeFive


Sharebased
Period End2020-12-312019-12-312016-12-312012-12-31
Value35.5535.5538.0267.17
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1140.8148.1134.7162.7

mdc:ExercisePriceRangeFour


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312012-12-31
Value32.3732.3730.731.0131.8260.41
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1128.2134.9121.0123.0112.7146.3

mdc:ExercisePriceRangeOne


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312012-12-31
Value19.7719.8919.2519.1319.9520.91
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance178.382.975.875.970.750.6

mdc:ExercisePriceRangeThree


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312012-12-31
Value27.1627.425.6225.827.4743.84
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1107.6114.2100.9102.397.3106.2

mdc:ExercisePriceRangeTwo


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312012-12-31
Value23.1423.1721.7221.7123.2129.79
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance191.796.585.686.182.272.1

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value3500000.03300000.03500000.0500000.0600000.0500000.0900000.0300000.0600000.01000000.05000000.07600000.0
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WarehouseAgreementBorrowings us-gaap:StatementBusinessSegments

us-gaap:WarehouseAgreementBorrowings

mdc:FinancialServicesSegment


Warehouse
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value1642172021301421081499083841169080901126569701149288
Percentage of WarehouseAgreementBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept


us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType
(None,)
Allocated Share Based Compensation Expenseus-gaap: Award Type
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardDate, us-gaap:AwardType, us-gaap:PlanName
(None, 'us-gaap:PerformanceShares', 'mdc:EquityIncentivePlan2011')
Allocated Share Based Compensation Expenseus-gaap: Award Date, us-gaap: Award Type, us-gaap: Plan Name
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
us-gaap:StatementBusinessSegments
(None,)
Income Loss From Continuing Operations 
Before Income Taxes Minority Interest And Income Loss From Equity Method Investmentsus-gaap: Statement Business Segments
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
('us-gaap:OperatingSegments', 'mdc:HomebuildingSegment', None)
Income Loss From Continuing Operations 
Before Income Taxes Minority Interest And Income Loss From Equity Method Investmentsus-gaap: Consolidation Items, us-gaap: Statement Business Segments, us-gaap: Subsegments
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
('us-gaap:OperatingSegments', 'mdc:FinancialServicesSegment', None)
Income Loss From Continuing Operations 
Before Income Taxes Minority Interest And Income Loss From Equity Method Investmentsus-gaap: Consolidation Items, us-gaap: Statement Business Segments, us-gaap: Subsegments
us-gaap:OtherNonoperatingIncomeExpense
us-gaap:StatementBusinessSegments
(None,)
Other Nonoperating Income Expenseus-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
('mdc:HomebuildingSegment', None)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Statement Business Segments, us-gaap: Subsegments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:StatementBusinessSegments, us-gaap:Subsegments
('mdc:FinancialServicesSegment', None)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Statement Business Segments, us-gaap: Subsegments
us-gaap:Assets
us-gaap:StatementBusinessSegments
(None,)
Assetsus-gaap: Statement Business Segments
us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments, us-gaap:Subsegments
('us-gaap:OperatingSegments', 'mdc:HomebuildingSegment', None)
Assetsus-gaap: Consolidation Items, us-gaap: Statement Business Segments, us-gaap: Subsegments
us-gaap:Liabilities
us-gaap:StatementBusinessSegments
(None,)
Liabilitiesus-gaap: Statement Business Segments
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:StatementBusinessSegments
(None,)
Cash And Cash Equivalents At Carrying Valueus-gaap: Statement Business Segments
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Accumulated Depreciation Depletion And Amortization Property Plant And Equipmentus-gaap: Property Plant And Equipment By Type
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Netus-gaap: Property Plant And Equipment By Type
us-gaap:LongTermDebt
us-gaap:DebtInstrument
(None,)
Long Term Debtus-gaap: Debt Instrument
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:IncreaseDecreaseInInventories
us-gaap:RealEstateProperties
(None,)
Increase Decrease In Inventoriesus-gaap: Real Estate Properties