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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
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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

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- 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
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Namespace Prefix: | mac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- 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

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- 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

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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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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- Details
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