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Investments in Unconsolidated Joint Ventures: Narrative (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Oct. 08, 2013
sqft
Aug. 28, 2014
Dec. 29, 2014
Mar. 30, 2012
sqft
May 31, 2012
sqft
Aug. 10, 2012
sqft
Jun. 12, 2013
sqft
Jul. 31, 2013
sqft
May 29, 2013
sqft
Jul. 30, 2014
Oct. 26, 2012
sqft
Oct. 24, 2013
Oct. 03, 2012
sqft
Jun. 04, 2014
Nov. 14, 2014
mall
Nov. 20, 2014
Feb. 17, 2015
Sep. 17, 2013
sqft
Sep. 16, 2013
Nov. 13, 2014
sqft
Investments in unconsolidated joint ventures:                                              
Purchase price paid through assumption of debt by the Company $ 1,414,659us-gaap_NoncashOrPartNoncashAcquisitionDebtAssumed1 $ 257,064us-gaap_NoncashOrPartNoncashAcquisitionDebtAssumed1 $ 420,123us-gaap_NoncashOrPartNoncashAcquisitionDebtAssumed1                                        
(Loss) gain on sale of assets 3,643mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets 190,526mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets 29,301mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets                                        
Proceeds from sale of assets 320,123mac_ProceedsFromSaleOfPartnershipInterestsOtherAssetsAndDiscontinuedOperationsNet 416,077mac_ProceedsFromSaleOfPartnershipInterestsOtherAssetsAndDiscontinuedOperationsNet 136,707mac_ProceedsFromSaleOfPartnershipInterestsOtherAssetsAndDiscontinuedOperationsNet                                        
Mortgage notes payable settled in deed-in-lieu of foreclosure 0us-gaap_NotesReduction 84,000us-gaap_NotesReduction 185,000us-gaap_NotesReduction                                        
Payments on mortgages, bank and other notes payable 853,080us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities 3,051,072us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities 2,371,890us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities                                        
Distributions to Co-venture Partner 15,555mac_DistributionsToCoVenturePartner 19,564mac_DistributionsToCoVenturePartner 39,479mac_DistributionsToCoVenturePartner                                        
Ridgmar Mall                                              
Investments in unconsolidated joint ventures:                                              
Property square footage       1,273,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= mac_RidgmarMallMember
                                     
(Loss) gain on sale of assets       6,243mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= mac_RidgmarMallMember
                                     
Gain recognized on sale       3,121mac_EquityMethodInvestmentGainLossonSaleofPropertyProRataShare
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= mac_RidgmarMallMember
                                     
Proceeds from sale       60,900us-gaap_ProceedsFromDivestitureOfBusinesses
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= mac_RidgmarMallMember
                                     
Payments on mortgages, bank and other notes payable       51,657us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= mac_RidgmarMallMember
                                     
Distributions to Co-venture Partner       9,243mac_DistributionsToCoVenturePartner
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= mac_RidgmarMallMember
                                     
Cascade Mall                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                                 589,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= mac_CascadeMallMember
           
Wilshire Boulevard                                              
Investments in unconsolidated joint ventures:                                              
Property square footage         40,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= mac_WilshireBoulevardMember
                                   
Purchase price funded by cash payment on acquisition         15,386us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= mac_WilshireBoulevardMember
                                   
Purchase price paid through assumption of debt by the Company         1,714us-gaap_NoncashOrPartNoncashAcquisitionDebtAssumed1
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= mac_WilshireBoulevardMember
                                   
(Loss) gain on sale of assets 9,033mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= mac_WilshireBoulevardMember
      9,033mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= mac_WilshireBoulevardMember
                                   
Percentage of ownership interest sold         30.00%mac_EquityMethodInvestmentsPercentageOfOwnershipInterestSold
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= mac_WilshireBoulevardMember
                                   
Proceeds from sale         17,100us-gaap_ProceedsFromDivestitureOfBusinesses
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= mac_WilshireBoulevardMember
                                   
Camelback Colonnade                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                                         619,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_CamelbackColonnadeMember
   
Ownership percentage purchased                                         67.50%mac_BusinessCombinationStepAcquisitionAdditionalEquityInterestAcquiredPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_CamelbackColonnadeMember
   
Ownership percentage in joint ventures                                           73.20%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_CamelbackColonnadeMember
 
Proceeds from sale           92,898us-gaap_ProceedsFromDivestitureOfBusinesses
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_CamelbackColonnadeMember
                                 
Chandler Village Center, LLC                                              
Investments in unconsolidated joint ventures:                                              
Property square footage             273,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerVillageCenterLLCMember
                               
Percentage of ownership interest sold             50.00%mac_EquityMethodInvestmentsPercentageOfOwnershipInterestSold
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerVillageCenterLLCMember
                               
Consideration received on sale of joint venture interest             14,795us-gaap_EquityMethodInvestmentNetSalesProceeds
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerVillageCenterLLCMember
                               
Gain on sale of investments in unconsolidated entity             8,184us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerVillageCenterLLCMember
                               
Proceeds from sale of assets             6,045mac_ProceedsFromSaleOfPartnershipInterestsOtherAssetsAndDiscontinuedOperationsNet
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerVillageCenterLLCMember
                               
Mortgage notes payable settled in deed-in-lieu of foreclosure             8,750us-gaap_NotesReduction
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerVillageCenterLLCMember
                               
Chandler Festival                                              
Investments in unconsolidated joint ventures:                                              
Property square footage             500,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerFestivalMember
                               
Percentage of ownership interest sold             50.00%mac_EquityMethodInvestmentsPercentageOfOwnershipInterestSold
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerFestivalMember
                               
Consideration received on sale of joint venture interest             30,975us-gaap_EquityMethodInvestmentNetSalesProceeds
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerFestivalMember
                               
Gain on sale of investments in unconsolidated entity             12,347us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerFestivalMember
                               
Proceeds from sale of assets             16,183mac_ProceedsFromSaleOfPartnershipInterestsOtherAssetsAndDiscontinuedOperationsNet
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerFestivalMember
                               
Mortgage notes payable settled in deed-in-lieu of foreclosure             14,792us-gaap_NotesReduction
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerFestivalMember
                               
Chandler Gateway                                              
Investments in unconsolidated joint ventures:                                              
Property square footage               260,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerGatewayMember
                             
Percentage of ownership interest sold               50.00%mac_EquityMethodInvestmentsPercentageOfOwnershipInterestSold
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerGatewayMember
                             
Consideration received on sale of joint venture interest               14,315us-gaap_EquityMethodInvestmentNetSalesProceeds
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerGatewayMember
                             
Gain on sale of investments in unconsolidated entity     3,363us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerGatewayMember
                                       
Proceeds from sale of assets               4,921mac_ProceedsFromSaleOfPartnershipInterestsOtherAssetsAndDiscontinuedOperationsNet
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerGatewayMember
                             
Mortgage notes payable settled in deed-in-lieu of foreclosure               9,394us-gaap_NotesReduction
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_ChandlerGatewayMember
                             
Kierland Commons Investment LLC                                              
Investments in unconsolidated joint ventures:                                              
Ownership percentage in joint ventures 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_KierlandCommonsInvestmentLLCMember
                                           
NorthPark Center                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                 1,946,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_NorthParkCenterMember
                           
Consideration received on sale of joint venture interest                 118,810us-gaap_EquityMethodInvestmentNetSalesProceeds
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_NorthParkCenterMember
                           
Gain on sale of investments in unconsolidated entity                 24,590us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_NorthParkCenterMember
                           
Pacific Premier Retail LP                                              
Investments in unconsolidated joint ventures:                                              
(Loss) gain on sale of assets (7,044)mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
182,754mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
90mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
                                       
SanTan Village Power Center                                              
Investments in unconsolidated joint ventures:                                              
Property square footage             491,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_SanTanVillagePowerCenterMember
                               
(Loss) gain on sale of assets             23,294mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_SanTanVillagePowerCenterMember
                               
Loan paid off             45,000us-gaap_RepaymentsOfDebt
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_SanTanVillagePowerCenterMember
                               
Proceeds from sale of property             54,780us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_SanTanVillagePowerCenterMember
                               
Cash distributed to the partners             9,780us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsPaid
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_SanTanVillagePowerCenterMember
                               
Gain recognized on sale             11,502mac_EquityMethodInvestmentGainLossonSaleofPropertyProRataShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_SanTanVillagePowerCenterMember
                               
Gain included in net income attributable to noncontrolling interest             (3,565)mac_EquityMethodInvestmentGainLossonSaleofPropertyProRataShareAttributabletoNoncontrollingInterest
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_SanTanVillagePowerCenterMember
                               
Kitsap Mall | Pacific Premier Retail LP                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                   846,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_KitsapMallMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
                         
(Loss) gain on sale of assets                   55,150mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_KitsapMallMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
                         
Proceeds from sale of property                   127,000us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_KitsapMallMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
                         
Gain recognized on sale                   28,127mac_EquityMethodInvestmentGainLossonSaleofPropertyProRataShare
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_KitsapMallMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
                         
Redmond Town Center | Pacific Premier Retail LP                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                     695,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_RedmondTownCenterMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
582,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_RedmondTownCenterMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
                     
(Loss) gain on sale of assets                     38,447mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_RedmondTownCenterMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
89,157mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_RedmondTownCenterMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
                     
Proceeds from sale of property                     127,000us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_RedmondTownCenterMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
185,000us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_RedmondTownCenterMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
                     
Gain recognized on sale                     18,251mac_EquityMethodInvestmentGainLossonSaleofPropertyProRataShare
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_RedmondTownCenterMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
44,424mac_EquityMethodInvestmentGainLossonSaleofPropertyProRataShare
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_RedmondTownCenterMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= mac_PacificPremierRetailLPMember
                     
The Gallery                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                         1,474,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_TheGalleryMember
                   
Purchase price on acquisition                         106,800us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_TheGalleryMember
                   
Joint Venture Ownership Percentage Purchased                         50.00%mac_JointVentureOwnershipPercentagePurchased
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_TheGalleryMember
                   
Candlestick Point                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                                             500,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_CandlestickPointMember
Candlestick Point | Notes Receivable                                              
Investments in unconsolidated joint ventures:                                              
Note receivable                                             65,130us-gaap_NotesReceivableRelatedParties
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_NotesReceivableMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_CandlestickPointMember
Description of variable rate LIBOR                                            
Candlestick Point | Notes Receivable | LIBOR                                              
Investments in unconsolidated joint ventures:                                              
Interest rate (as a percent)                                             2.00%us-gaap_LoansReceivableBasisSpreadOnVariableRate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_NotesReceivableMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_CandlestickPointMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
Arrowhead Towne Center                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                           1,198,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_BusinessAcquisitionAxis
= mac_ArrowheadTowneCenterMember
                 
Ownership percentage purchased                           33.30%mac_BusinessCombinationStepAcquisitionAdditionalEquityInterestAcquiredPercentage
/ us-gaap_BusinessAcquisitionAxis
= mac_ArrowheadTowneCenterMember
                 
Purchase price on acquisition                           144,400us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= mac_ArrowheadTowneCenterMember
                 
Purchase price funded by cash payment on acquisition                           69,025us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= mac_ArrowheadTowneCenterMember
                 
Purchase price paid through assumption of debt by the Company                           75,375us-gaap_NoncashOrPartNoncashAcquisitionDebtAssumed1
/ us-gaap_BusinessAcquisitionAxis
= mac_ArrowheadTowneCenterMember
                 
Superstition Springs Land I                                              
Investments in unconsolidated joint ventures:                                              
Ownership percentage purchased                             33.30%mac_BusinessCombinationStepAcquisitionAdditionalEquityInterestAcquiredPercentage
/ us-gaap_BusinessAcquisitionAxis
= mac_SuperstitionSpringsLandIMember
               
Purchase price on acquisition                             46,162us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= mac_SuperstitionSpringsLandIMember
               
Purchase price funded by cash payment on acquisition                             23,662us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= mac_SuperstitionSpringsLandIMember
               
Purchase price paid through assumption of debt by the Company                             22,500us-gaap_NoncashOrPartNoncashAcquisitionDebtAssumed1
/ us-gaap_BusinessAcquisitionAxis
= mac_SuperstitionSpringsLandIMember
               
FlatIron Crossing                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                               1,434,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_BusinessAcquisitionAxis
= mac_FlatIronCrossingMember
             
Ownership percentage purchased 75.00%mac_BusinessCombinationStepAcquisitionAdditionalEquityInterestAcquiredPercentage
/ us-gaap_BusinessAcquisitionAxis
= mac_FlatIronCrossingMember
                            75.00%mac_BusinessCombinationStepAcquisitionAdditionalEquityInterestAcquiredPercentage
/ us-gaap_BusinessAcquisitionAxis
= mac_FlatIronCrossingMember
             
Purchase price on acquisition                               310,397us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= mac_FlatIronCrossingMember
             
Purchase price funded by cash payment on acquisition                               195,900us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= mac_FlatIronCrossingMember
             
Purchase price paid through assumption of debt by the Company                               114,497us-gaap_NoncashOrPartNoncashAcquisitionDebtAssumed1
/ us-gaap_BusinessAcquisitionAxis
= mac_FlatIronCrossingMember
             
Cascade Mall                                              
Investments in unconsolidated joint ventures:                                              
Ownership percentage purchased                                 49.00%mac_BusinessCombinationStepAcquisitionAdditionalEquityInterestAcquiredPercentage
/ us-gaap_BusinessAcquisitionAxis
= mac_CascadeMallMember
           
Purchase price on acquisition                                 15,233us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= mac_CascadeMallMember
           
PPRLP Queens Portfolio                                              
Investments in unconsolidated joint ventures:                                              
Ownership percentage purchased                                   49.00%mac_BusinessCombinationStepAcquisitionAdditionalEquityInterestAcquiredPercentage
/ us-gaap_BusinessAcquisitionAxis
= mac_PPRLPQueensPortfolioMember
         
Purchase price on acquisition                                   1,838,886us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= mac_PPRLPQueensPortfolioMember
         
Purchase price paid through assumption of debt by the Company                                   672,109us-gaap_NoncashOrPartNoncashAcquisitionDebtAssumed1
/ us-gaap_BusinessAcquisitionAxis
= mac_PPRLPQueensPortfolioMember
         
Number of shopping centers                                   5mac_NumberOfRegionalShoppingCentersOwnedByInvestee
/ us-gaap_BusinessAcquisitionAxis
= mac_PPRLPQueensPortfolioMember
         
Equity issued (in shares)                                   1,166,777us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
/ us-gaap_BusinessAcquisitionAxis
= mac_PPRLPQueensPortfolioMember
         
PPRLP Queens Portfolio | Lakewood Center                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                                   2,066,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_BusinessAcquisitionAxis
= mac_PPRLPQueensPortfolioMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_LakewoodCenterMember
         
PPRLP Queens Portfolio | Los Cerritos Center                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                                   1,113,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_BusinessAcquisitionAxis
= mac_PPRLPQueensPortfolioMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_LosCerritosCenterMember
         
PPRLP Queens Portfolio | Queens Center                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                                   967,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_BusinessAcquisitionAxis
= mac_PPRLPQueensPortfolioMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_QueensCenterMember
         
PPRLP Queens Portfolio | Stonewood Center                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                                   932,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_BusinessAcquisitionAxis
= mac_PPRLPQueensPortfolioMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_StonewoodCenterMember
         
PPRLP Queens Portfolio | Washington Square                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                                   1,441,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_BusinessAcquisitionAxis
= mac_PPRLPQueensPortfolioMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= mac_WashingtonSquareMember
         
443 Wabash MAB LLC                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                                     65,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_BusinessAcquisitionAxis
= mac_A443WabashMABLLCMember
       
Purchase price on acquisition                                     18,900us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= mac_A443WabashMABLLCMember
       
Joint Venture Ownership Percentage Purchased                                     45.00%mac_JointVentureOwnershipPercentagePurchased
/ us-gaap_BusinessAcquisitionAxis
= mac_A443WabashMABLLCMember
       
Subsequent Event | Inland Center                                              
Investments in unconsolidated joint ventures:                                              
Property square footage                                       933,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_BusinessAcquisitionAxis
= mac_InlandCenterMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Ownership percentage purchased                                       50.00%mac_BusinessCombinationStepAcquisitionAdditionalEquityInterestAcquiredPercentage
/ us-gaap_BusinessAcquisitionAxis
= mac_InlandCenterMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Purchase price on acquisition                                       51,250us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= mac_InlandCenterMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Purchase price funded by cash payment on acquisition                                       26,250us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= mac_InlandCenterMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Purchase price paid through assumption of debt by the Company                                       25,000us-gaap_NoncashOrPartNoncashAcquisitionDebtAssumed1
/ us-gaap_BusinessAcquisitionAxis
= mac_InlandCenterMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Loan paid off                                       $ 50,000us-gaap_RepaymentsOfDebt
/ us-gaap_BusinessAcquisitionAxis
= mac_InlandCenterMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember