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Co-Venture Arrangement (Details) ft² in Thousands, $ in Thousands	Sep. 30, 2009 USD ($) ft²	Sep. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Co-Venture Arrangement
Co-venture obligation | $		$ 59,609	$ 63,756
Freehold Raceway Mall and Chandler Fashion Center
Co-Venture Arrangement
Percentage of loan assumed by third party (percent)	49.90%
Co-venture obligation | $	$ 168,154
Freehold Raceway Mall
Co-Venture Arrangement
Property area (in square feet) | ft²	1,674
Chandler Fashion Center
Co-Venture Arrangement
Property area (in square feet) | ft²	1,319

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 40
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.U.Q2)
-URI http://asc.fasb.org/extlink&oid=6955272&loc=d3e221323-122791

+ 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: