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Related Party Transactions - Schedule of fees charged to unconsolidated joint ventures (Details) - Unconsolidated Joint Ventures and Third Party Managed Properties - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Related Party Transaction [Line Items]
Management fees	$ 4,679	$ 4,480
Development and leasing fees	3,604	5,270
Fees charged to unconsolidated joint ventures	$ 8,283	$ 9,750

X

- Definition

Revenue, comprised of fees related to the development and leasing of joint venture properties and third-party managed properties.

+ References

No definition available.

+ Details

Name:	mac_DevelopmentAndLeasingFeesRevenue
Namespace Prefix:	mac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Revenue, comprised of base and incentive revenue, from developing, operating and managing another entity's business during the reporting period.

+ References

No definition available.

+ Details

Name:	mac_ManagementDevelopmentAndLeasingFeesRevenue
Namespace Prefix:	mac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Revenue, comprised of base and incentive revenue derived from the management of joint ventures, managing third-party properties, or another entity's operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(d))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mac_UnconsolidatedJointVenturesAndThirdPartyManagedPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: