Portion of the loan assumed by a third party.

No definition available.

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- Definition

Amount of contractual principal due at origination of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column F
-Subsection 29

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 948
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Column F))
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
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-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Amount, after accumulated amortization, of debt premium.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
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Balance Type:	credit
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-SubTopic 30
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-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

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Period Type:	instant

- Details

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- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mac_GreenAcresCommonsMember
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- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mac_KingsPlazaShoppingCenterMember
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- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mac_SantaMonicaPlaceMortgageMember
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Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mac_SanTanVillageRegionalCenterMortgageMember
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Name:	us-gaap_DebtInstrumentAxis=mac_FreeholdRacewayMallAndChandlerFashionCenterMember
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- Details

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Mortgage Notes Payable - Footnotes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 03, 2019	Jun. 27, 2019	Jun. 03, 2019	Feb. 13, 2019	Jan. 10, 2019	Dec. 31, 2018
Mortgage loans payable on real estate
Unamortized deferred finance costs	$ 16,042						$ 13,053
Chandler Fashion Center
Mortgage loans payable on real estate
Mortgage loan			$ 256,000
Effective interest rate (as a percent)	4.18%		4.18%
Fashion Outlets of Chicago
Mortgage loans payable on real estate
Mortgage loan						$ 300,000
Effective interest rate (as a percent)	4.61%					4.61%
Green Acres Commons
Mortgage loans payable on real estate
Effective interest rate (as a percent)	4.40%						5.06%
Kings Plaza Shopping Center
Mortgage loans payable on real estate
Mortgage loan		$ 540,000
Effective interest rate (as a percent)		3.71%
Santa Monica Place
Mortgage loans payable on real estate
Effective interest rate (as a percent)	3.34%
SanTan Village Regional Center
Mortgage loans payable on real estate
Effective interest rate (as a percent)	4.34%
Freehold Raceway Mall and Chandler Fashion Center \| Joint venture
Mortgage loans payable on real estate
Interest in the loan assumed by a third party (as a percent)	49.90%
Fashion Outlets of Niagara Falls USA
Mortgage loans payable on real estate
Debt premiums	$ 773						$ 1,701
Green Acres Commons
Mortgage loans payable on real estate
Variable interest rate spread (as a percent)	2.15%
Santa Monica Place
Mortgage loans payable on real estate
Effective interest rate (as a percent)							4.01%
Variable interest rate spread (as a percent)	1.35%
Santa Monica Place \| Maximum \| Interest rate cap
Mortgage loans payable on real estate
Variable interest rate spread (as a percent)	4.00%
SanTan Village Regional Center
Mortgage loans payable on real estate
Mortgage loan				$ 220,000	$ 220,000