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Co-Venture Arrangement (Details) ft² in Thousands, $ in Thousands	Sep. 30, 2009 USD ($) ft²	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Co-Venture Arrangement
Co-venture obligation | $		$ 59,118	$ 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: