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Mortgage Notes Payable - Footnotes (Details) (USD $)	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 03, 2015	Feb. 25, 2015	Sep. 30, 2009	Dec. 31, 2014	Jan. 01, 2015	Feb. 19, 2015
Mortgage loans payable on real estate
Carrying Amount of Mortgage Notes, Other	$ 5,200,053,000mac_SecuredDebtNonrelatedParty					$ 5,115,482,000mac_SecuredDebtNonrelatedParty
Related parties	286,849,000us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent					289,039,000us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent
Gain on extinguishment of debt, net	2,245,000us-gaap_GainsLossesOnExtinguishmentOfDebt	(358,000)us-gaap_GainsLossesOnExtinguishmentOfDebt
Mortgage notes payable which could become recourse	13,500,000mac_MortgageNotesPayableProbableRecourseAmount					73,165,000mac_MortgageNotesPayableProbableRecourseAmount
Interest expense capitalized	2,629,000us-gaap_InterestCostsCapitalized	2,485,000us-gaap_InterestCostsCapitalized
Fair value of mortgage notes payable	5,538,879,000us-gaap_NotesPayableFairValueDisclosure					5,455,453,000us-gaap_NotesPayableFairValueDisclosure
Fashion Outlets of Chicago
Mortgage loans payable on real estate
Carrying Amount of Mortgage Notes, Other	200,000,000mac_SecuredDebtNonrelatedParty / us-gaap_DebtInstrumentAxis = mac_FashionOutletsOfChicagoMortgageMember					119,329,000mac_SecuredDebtNonrelatedParty / us-gaap_DebtInstrumentAxis = mac_FashionOutletsOfChicagoMortgageMember
Interest rate basis	LIBOR
Interest rate spread over basis (as a percent)			1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = mac_FashionOutletsOfChicagoMortgageMember
Effective interest rate (as a percent)	1.83%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mac_FashionOutletsOfChicagoMortgageMember					2.97%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mac_FashionOutletsOfChicagoMortgageMember
Related parties	0us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_FashionOutletsOfChicagoMortgageMember					0us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_FashionOutletsOfChicagoMortgageMember
Great Northern Mall
Mortgage loans payable on real estate
Carrying Amount of Mortgage Notes, Other	34,232,000mac_SecuredDebtNonrelatedParty / us-gaap_DebtInstrumentAxis = mac_GreatNorthernMallMortgageMember					34,494,000mac_SecuredDebtNonrelatedParty / us-gaap_DebtInstrumentAxis = mac_GreatNorthernMallMortgageMember
Effective interest rate (as a percent)	6.54%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mac_GreatNorthernMallMortgageMember
Default interest rate (as a percent)							4.00%mac_DebtInstrumentDefaultInterest / us-gaap_DebtInstrumentAxis = mac_GreatNorthernMallMortgageMember
Related parties	0us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_GreatNorthernMallMortgageMember					0us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_GreatNorthernMallMortgageMember
Lakewood Center Mortgage
Mortgage loans payable on real estate
Carrying Amount of Mortgage Notes, Other	0mac_SecuredDebtNonrelatedParty / us-gaap_DebtInstrumentAxis = mac_LakewoodCenterMortgageMember					253,708,000mac_SecuredDebtNonrelatedParty / us-gaap_DebtInstrumentAxis = mac_LakewoodCenterMortgageMember
Related parties	0us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_LakewoodCenterMortgageMember					0us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_LakewoodCenterMortgageMember
Gain on extinguishment of debt, net				2,245,000us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_DebtInstrumentAxis = mac_LakewoodCenterMortgageMember
The Mall at Northgate
Mortgage loans payable on real estate
Carrying Amount of Mortgage Notes, Other	64,000,000mac_SecuredDebtNonrelatedParty / us-gaap_DebtInstrumentAxis = mac_TheMallAtNorthgateMortgageMember					64,000,000mac_SecuredDebtNonrelatedParty / us-gaap_DebtInstrumentAxis = mac_TheMallAtNorthgateMortgageMember
Interest rate basis	LIBOR
Interest rate spread over basis (as a percent)	2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = mac_TheMallAtNorthgateMortgageMember
Effective interest rate (as a percent)	3.06%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mac_TheMallAtNorthgateMortgageMember					3.05%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mac_TheMallAtNorthgateMortgageMember
Related parties	0us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_TheMallAtNorthgateMortgageMember					0us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_TheMallAtNorthgateMortgageMember
Mall of Victor Valley
Mortgage loans payable on real estate
Carrying Amount of Mortgage Notes, Other	115,000,000mac_SecuredDebtNonrelatedParty / us-gaap_DebtInstrumentAxis = mac_MallOfVictorValleyMortgageMember					115,000,000mac_SecuredDebtNonrelatedParty / us-gaap_DebtInstrumentAxis = mac_MallOfVictorValleyMortgageMember
Effective interest rate (as a percent)	4.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mac_MallOfVictorValleyMortgageMember
Related parties	0us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_MallOfVictorValleyMortgageMember					0us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_MallOfVictorValleyMortgageMember
Superstition Springs Center
Mortgage loans payable on real estate
Carrying Amount of Mortgage Notes, Other	68,000,000mac_SecuredDebtNonrelatedParty / us-gaap_DebtInstrumentAxis = mac_SuperstitionSpringsCenterMember					68,079,000mac_SecuredDebtNonrelatedParty / us-gaap_DebtInstrumentAxis = mac_SuperstitionSpringsCenterMember
Interest rate basis	LIBOR
Interest rate spread over basis (as a percent)	2.30%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = mac_SuperstitionSpringsCenterMember
Effective interest rate (as a percent)	2.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mac_SuperstitionSpringsCenterMember					1.98%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mac_SuperstitionSpringsCenterMember
Related parties	0us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_SuperstitionSpringsCenterMember					0us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_SuperstitionSpringsCenterMember
Vintage Faire Mall
Mortgage loans payable on real estate
Carrying Amount of Mortgage Notes, Other	280,000,000mac_SecuredDebtNonrelatedParty / us-gaap_DebtInstrumentAxis = mac_VintageFaireMallMortgageMember					0mac_SecuredDebtNonrelatedParty / us-gaap_DebtInstrumentAxis = mac_VintageFaireMallMortgageMember
Effective interest rate (as a percent)	3.55%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = mac_VintageFaireMallMortgageMember
Related parties	$ 0us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_VintageFaireMallMortgageMember					$ 0us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_VintageFaireMallMortgageMember		$ 280,000,000us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = mac_VintageFaireMallMortgageMember
Freehold Raceway Mall and Chandler Fashion Center
Mortgage loans payable on real estate
Percentage of loan assumed by third party (as a percent)					49.90%mac_PercentageOfLoanAssumedByThirdParty / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = mac_FreeholdRacewayMallAndChandlerFashionCenterMember

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Represents the amount of mortgage notes payable which could become recourse to the entity.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations such as mortgage loans.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Amount of interest capitalized during the period.

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-Glossary Allowance for Funds Used during Construction

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Fair value portion of notes payable.

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The amount for notes payable (written promise to pay), due to related parties.

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