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Investments in Unconsolidated Joint Ventures - Combined Condensed Statements of Operations of Unconsolidated Joint Ventures (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Revenues: |  |
Minimum rents | $ 67,522 mac_EquityMethodInvestmentSummarizedFinancialInformationMinimumLeaseRevenue | $ 98,257 mac_EquityMethodInvestmentSummarizedFinancialInformationMinimumLeaseRevenue
Percentage rents | 1,623 mac_EquityMethodInvestmentSummarizedFinancialInformationPercentageRent | 2,051 mac_EquityMethodInvestmentSummarizedFinancialInformationPercentageRent
Tenant recoveries | 32,363 mac_EquityMethodInvestmentSummarizedFinancialInformationTenantReimbursements | 48,745 mac_EquityMethodInvestmentSummarizedFinancialInformationTenantReimbursements
Other | 7,590 mac_EquityMethodInvestmentSummarizedFinancialInformationOtherRevenue | 9,619 mac_EquityMethodInvestmentSummarizedFinancialInformationOtherRevenue
Total revenues | 109,098 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue | 158,672 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue
Expenses: |  |
Shopping center and operating expenses | 42,178 mac_EquityMethodInvestmentSummarizedFinancialInformationCostOfRealEstateRevenue | 55,170 mac_EquityMethodInvestmentSummarizedFinancialInformationCostOfRealEstateRevenue
Interest expense | 20,383 mac_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense | 37,499 mac_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense
Depreciation and amortization | 29,670 mac_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization | 34,923 mac_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization
Total operating expenses | 92,231 mac_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses | 127,592 mac_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses
Loss on remeasurement, sale or write down of assets, net |  | (104)mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets
Net income | 16,867 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss | 30,976 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss
Company's equity in net income | 8,274 us-gaap_IncomeLossFromEquityMethodInvestments | 13,769 us-gaap_IncomeLossFromEquityMethodInvestments
Pacific Premier Retail LP |  |
Revenues: |  |
Minimum rents | 0 mac_EquityMethodInvestmentSummarizedFinancialInformationMinimumLeaseRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember | 26,080 mac_EquityMethodInvestmentSummarizedFinancialInformationMinimumLeaseRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember
Percentage rents | 0 mac_EquityMethodInvestmentSummarizedFinancialInformationPercentageRent / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember | 659 mac_EquityMethodInvestmentSummarizedFinancialInformationPercentageRent / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember
Tenant recoveries | 0 mac_EquityMethodInvestmentSummarizedFinancialInformationTenantReimbursements / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember | 11,740 mac_EquityMethodInvestmentSummarizedFinancialInformationTenantReimbursements / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember
Other | 0 mac_EquityMethodInvestmentSummarizedFinancialInformationOtherRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember | 1,077 mac_EquityMethodInvestmentSummarizedFinancialInformationOtherRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember
Total revenues | 0 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember | 39,556 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember
Expenses: |  |
Shopping center and operating expenses | 0 mac_EquityMethodInvestmentSummarizedFinancialInformationCostOfRealEstateRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember | 11,131 mac_EquityMethodInvestmentSummarizedFinancialInformationCostOfRealEstateRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember
Interest expense | 0 mac_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember | 10,098 mac_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember
Depreciation and amortization | 0 mac_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember | 8,798 mac_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember
Total operating expenses | 0 mac_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember | 30,027 mac_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember
Loss on remeasurement, sale or write down of assets, net |  | (86)mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember
Net income | 0 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember | 9,443 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember
Company's equity in net income | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember | 4,268 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_PacificPremierRetailLPMember
Tysons Corner LLC |  |
Revenues: |  |
Minimum rents | 17,028 mac_EquityMethodInvestmentSummarizedFinancialInformationMinimumLeaseRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember | 16,278 mac_EquityMethodInvestmentSummarizedFinancialInformationMinimumLeaseRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember
Percentage rents | 329 mac_EquityMethodInvestmentSummarizedFinancialInformationPercentageRent / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember | 424 mac_EquityMethodInvestmentSummarizedFinancialInformationPercentageRent / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember
Tenant recoveries | 12,262 mac_EquityMethodInvestmentSummarizedFinancialInformationTenantReimbursements / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember | 11,894 mac_EquityMethodInvestmentSummarizedFinancialInformationTenantReimbursements / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember
Other | 593 mac_EquityMethodInvestmentSummarizedFinancialInformationOtherRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember | 687 mac_EquityMethodInvestmentSummarizedFinancialInformationOtherRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember
Total revenues | 30,212 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember | 29,283 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember
Expenses: |  |
Shopping center and operating expenses | 9,948 mac_EquityMethodInvestmentSummarizedFinancialInformationCostOfRealEstateRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember | 10,159 mac_EquityMethodInvestmentSummarizedFinancialInformationCostOfRealEstateRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember
Interest expense | 8,129 mac_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember | 7,830 mac_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember
Depreciation and amortization | 5,450 mac_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember | 4,602 mac_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember
Total operating expenses | 23,527 mac_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember | 22,591 mac_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember
Loss on remeasurement, sale or write down of assets, net |  | 0 mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember
Net income | 6,685 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember | 6,692 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember
Company's equity in net income | 3,006 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember | 1,758 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_TysonsCornerLLCMember
Other Joint Ventures |  |
Revenues: |  |
Minimum rents | 50,494 mac_EquityMethodInvestmentSummarizedFinancialInformationMinimumLeaseRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember | 55,899 mac_EquityMethodInvestmentSummarizedFinancialInformationMinimumLeaseRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember
Percentage rents | 1,294 mac_EquityMethodInvestmentSummarizedFinancialInformationPercentageRent / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember | 968 mac_EquityMethodInvestmentSummarizedFinancialInformationPercentageRent / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember
Tenant recoveries | 20,101 mac_EquityMethodInvestmentSummarizedFinancialInformationTenantReimbursements / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember | 25,111 mac_EquityMethodInvestmentSummarizedFinancialInformationTenantReimbursements / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember
Other | 6,997 mac_EquityMethodInvestmentSummarizedFinancialInformationOtherRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember | 7,855 mac_EquityMethodInvestmentSummarizedFinancialInformationOtherRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember
Total revenues | 78,886 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember | 89,833 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember
Expenses: |  |
Shopping center and operating expenses | 32,230 mac_EquityMethodInvestmentSummarizedFinancialInformationCostOfRealEstateRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember | 33,880 mac_EquityMethodInvestmentSummarizedFinancialInformationCostOfRealEstateRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember
Interest expense | 12,254 mac_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember | 19,571 mac_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember
Depreciation and amortization | 24,220 mac_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember | 21,523 mac_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember
Total operating expenses | 68,704 mac_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember | 74,974 mac_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember
Loss on remeasurement, sale or write down of assets, net |  | (18)mac_EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSaleAndRemeasurementOfAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember
Net income | 10,182 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember | 14,841 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember
Company's equity in net income | $ 5,268 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember | $ 7,743 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = mac_OtherJointVenturesMember

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