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v2.4.1.9

Related Party Transactions: (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014 note | Nov. 13, 2014 sqft
Related party transactions |  |  |  |
Interest expense, related party | $ 2,729 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty | $ 3,708 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty |  |
Due from affiliates | 79,582 us-gaap_DueFromAffiliates |  | 80,232 us-gaap_DueFromAffiliates |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 6.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners |  | 6.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners |
Related parties note receivable, AWE Talisman Company |  |  |  |
Related party transactions |  |  |  |
Number of notes receivable (in notes) |  |  | 2 mac_NumberOfNotesReceivable / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = mac_RelatedPartiesNoteReceivableAweTalismanCompanyMember |
Related parties note receivable, RED Consolidated Holdings, LLC |  |  |  |
Related party transactions |  |  |  |
Interest income, related party | 137 us-gaap_RevenueFromRelatedParties / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = mac_RelatedPartiesNoteReceivableRedConsolidatedHoldingsLlcMember | 160 us-gaap_RevenueFromRelatedParties / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = mac_RelatedPartiesNoteReceivableRedConsolidatedHoldingsLlcMember |  |
Due from affiliates | 10,591 us-gaap_DueFromAffiliates / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = mac_RelatedPartiesNoteReceivableRedConsolidatedHoldingsLlcMember |  | 11,027 us-gaap_DueFromAffiliates / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = mac_RelatedPartiesNoteReceivableRedConsolidatedHoldingsLlcMember |
Note receivable, interest rate (as a percent) | 5.25%mac_NotesReceivableInterestRate / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = mac_RelatedPartiesNoteReceivableRedConsolidatedHoldingsLlcMember |  |  |
Unconsolidated joint ventures and third-party managed properties |  |  |  |
Related party transactions |  |  |  |
Management fees | 2,701 us-gaap_ManagementFeesRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = mac_UnconsolidatedJointVenturesAndThirdPartyManagedPropertiesMember | 4,825 us-gaap_ManagementFeesRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = mac_UnconsolidatedJointVenturesAndThirdPartyManagedPropertiesMember |  |
Development and leasing fees | 2,072 mac_DevelopmentAndLeasingFeesRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = mac_UnconsolidatedJointVenturesAndThirdPartyManagedPropertiesMember | 2,496 mac_DevelopmentAndLeasingFeesRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = mac_UnconsolidatedJointVenturesAndThirdPartyManagedPropertiesMember |  |
Fees charged to unconsolidated joint ventures and third-party managed properties | 4,773 mac_ManagementDevelopmentAndLeasingFeesRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = mac_UnconsolidatedJointVenturesAndThirdPartyManagedPropertiesMember | 7,321 mac_ManagementDevelopmentAndLeasingFeesRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = mac_UnconsolidatedJointVenturesAndThirdPartyManagedPropertiesMember |  |
Northwestern Mutual Life (NML) |  |  |  |
Related party transactions |  |  |  |
Interest expense payable, related party | 1,119 mac_InterestExpensePayableRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = mac_NorthwesternMutualLifeMember |  | 1,125 mac_InterestExpensePayableRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = mac_NorthwesternMutualLifeMember |
Unconsolidated joint ventures |  |  |  |
Related party transactions |  |  |  |
Interest income, related party |  | 31 us-gaap_RevenueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = mac_UnconsolidatedJointVenturesMember |  |
Due from affiliates | 3,222 us-gaap_DueFromAffiliates / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = mac_UnconsolidatedJointVenturesMember |  | 3,869 us-gaap_DueFromAffiliates / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = mac_UnconsolidatedJointVenturesMember |
Affiliated Entity |  |  |  |
Related party transactions |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  | 40.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember |
Affiliated Entity | Related parties note receivable, AWE Talisman Company |  |  |  |
Related party transactions |  |  |  |
Interest income, related party |  | 154 us-gaap_RevenueFromRelatedParties / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = mac_RelatedPartiesNoteReceivableAweTalismanCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember |  |
Number of notes receivable (in notes) |  | 2 mac_NumberOfNotesReceivable / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = mac_RelatedPartiesNoteReceivableAweTalismanCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember |  |
Note receivable, interest rate (as a percent) | 5.00%mac_NotesReceivableInterestRate / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = mac_RelatedPartiesNoteReceivableAweTalismanCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember |  |  |
Fashion Outlets of Chicago | Affiliated Entity |  |  |  |
Related party transactions |  |  |  |
Property area (in square feet) |  |  | 528,000 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = mac_FashionOutletsOfChicagoMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember |
Candlestick Point |  |  |  |
Related party transactions |  |  |  |
Property area (in square feet) |  |  |  | 500,000 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = mac_CandlestickPointMember
Candlestick Point | Notes Receivable |  |  |  |
Related party transactions |  |  |  |
Description of variable rate basis | LIBOR |  |  |
Note receivable |  |  |  | 65,130 us-gaap_NotesReceivableRelatedParties / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_NotesReceivableMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = mac_CandlestickPointMember
Candlestick Point | Affiliated Entity | Notes Receivable |  |  |  |
Related party transactions |  |  |  |
Description of variable rate basis | LIBOR |  |  |
Interest Income, Related Party | 433 us-gaap_InterestIncomeRelatedParty / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_NotesReceivableMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = mac_CandlestickPointMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember |  |  |
Note receivable | $ 65,769 us-gaap_NotesReceivableRelatedParties / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_NotesReceivableMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = mac_CandlestickPointMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember |  | 65,336 us-gaap_NotesReceivableRelatedParties / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_NotesReceivableMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = mac_CandlestickPointMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember |
London Interbank Offered Rate (LIBOR) | Candlestick Point | Affiliated Entity | Notes Receivable |  |  |  |
Related party transactions |  |  |  |
Note receivable, interest rate (as a percent) | 2.00%mac_NotesReceivableInterestRate / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_NotesReceivableMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = mac_CandlestickPointMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |

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