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Summary of Significant Accounting Policies - Deferred Charges, Segment Information and Shareholder Activism Costs (Details) | 12 Months Ended
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Dec. 31, 2024
Minimum |
Deferred Charges: |
Deferred lease costs, amortization period (in years) | 1 year
Deferred financing costs, amortization period (in years) | 1 year
Maximum |
Deferred Charges: |
Deferred lease costs, amortization period (in years) | 20 years
Deferred financing costs, amortization period (in years) | 15 years

X
- Definition Represents the term of loan agreements over which financing costs are deferred and amortized. + References No definition available. + Details
Name: | mac_DeferredFinancingCostsAmortizationPeriod
Namespace Prefix: | mac_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the initial term of tenant lease agreements over which leasing costs are deferred and amortized. + References No definition available. + Details
Name: | mac_DeferredLeasingCostsAmortizationPeriod
Namespace Prefix: | mac_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DeferredCostsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |