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Co-Venture Arrangement (Details) ft² in Thousands, $ in Thousands | Sep. 30, 2009 USD ($) ft² | Jun. 30, 2017 USD ($) | Dec. 31, 2016 USD ($)
--- | --- | --- | ---
Co-Venture Arrangement |  |  |
Co-venture obligation | $ |  | $ 59,647 | $ 58,973
Freehold Raceway Mall and Chandler Fashion Center |  |  |
Co-Venture Arrangement |  |  |
Percentage of loan assumed by third party | 49.90% |  |
Co-venture obligation | $ | $ 168,154 |  |
Freehold Raceway Mall |  |  |
Co-Venture Arrangement |  |  |
Property area (in square feet) | ft² | 1,671 |  |
Chandler Fashion Center |  |  |
Co-Venture Arrangement |  |  |
Property area (in square feet) | ft² | 1,318 |  |

X
- Definition The percentage of ownership interest in the joint venture sold by the entity during the period. + References No definition available. + Details
Name: | mac_JointVentureOwnershipPercentageSold
Namespace Prefix: | mac_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | mac_ScheduleOfJointVenturesLineItems
Namespace Prefix: | mac_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of gain on the sale of property that does not qualify for gain recognition as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_DeferredGainOnSaleOfProperty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mac_FreeholdRacewayMallAndChandlerFashionCenterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mac_FreeholdRacewayMallMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mac_ChandlerFashionCenterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |