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v3.21.1

Financing Arrangement - Financing arrangement activity (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Schedule of Joint Ventures [Line Items] |  |
Interest income (expense) | $ 1,319 | $ (44,243)
Joint Venture | Financing Arrangement |  |
Schedule of Joint Ventures [Line Items] |  |
Distributions equal to the partner's share of net (loss) income | (1,232) | 1,464
Distributions in excess of the partner's share of net income | 3,414 | 2,677
Adjustment to fair value of financing arrangement obligation | (863) | (48,384)
Interest income (expense) | $ 1,319 | $ (44,243)

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- Definition Fair Value Adjustment of Finance Obligation + References No definition available. + Details
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Namespace Prefix: | mac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Income (Loss) from Joint Venture + References No definition available. + Details
Name: | mac_IncomeLossfromJointVenture
Namespace Prefix: | mac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Interest Income (Expense), Related Party + 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 Joint Venture, Distributions in Excess of Partner Share of Income (Loss) + 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 -- None. No documentation exists for this element. -- + References No definition available. + Details
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Namespace Prefix: | mac_
Data Type: | xbrli:stringItemType
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RelatedPartyTransactionAxis=mac_FinancingArrangementMember
Namespace Prefix: |
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Balance Type: |
Period Type: |