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Real Estate Acquisitions and Dispositions - Schedule of Real Estate Asset Acquisitions and Dispositions (Parenthetical) (Details) | Sep. 30, 2021
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Novel West Midtown [Member] |
Acquisitionsand Disposals [Line Items] |
Joint venture interest | 80.00%

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- Definition Acquisitions and Disposals [Line Items] + References No definition available. + Details
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Namespace Prefix: | maa_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |