XML 54 R40.htm IDEA: XBRL DOCUMENT
v3.23.1

Shareholders' Equity of MAA - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Jan. 31, 2023 | Aug. 31, 2021 | Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Equity [Line Items] |  |  |  |  |
Common stock, shares outstanding |  |  | 116,600,756 | 115,337,466 | 115,480,336
Total common shares and operating partnership units outstanding |  |  | 119,756,455 | 118,539,843 |
Settled share amount | $ 1.1 |  |  |  |
Forward price per share | $ 185.23 |  |  |  |
Net proceeds | $ 203.7 |  |  |  |
Equity Forward Sale Agreements [Member] |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  | 1,100,000 |  |  |
Common stock, price per share |  | $ 190.56 |  |  |
Common stock settlement under agreement |  |  |  |  | 0
At The Market Offering [Member] |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Common stock shares sold |  |  | 0 | 0 |
Remaining common stock to be issued |  |  | 4,000,000.0 |  |
Maximum [Member] | At The Market Offering [Member] |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  |  | 4,000,000.0 |  |
Noncontrolling Interest [Member] |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Common Shares Issuable Upon Conversion Of Convertible Stock |  |  | 3,155,699 | 3,202,377 |

X
- Definition Common Shares and Operating Partnership Units, Outstanding + References No definition available. + Details
Name: | maa_CommonSharesAndOperatingPartnershipUnitsOutstanding
Namespace Prefix: | maa_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Common Shares Issuable upon Conversion of Convertible Stock + References No definition available. + Details
Name: | maa_CommonSharesIssuableUponConversionOfConvertibleStock
Namespace Prefix: | maa_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Common stock settlement under agreement. + References No definition available. + Details
Name: | maa_CommonStockSettlementUnderAgreement
Namespace Prefix: | maa_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Equity [Line Items] + References No definition available. + Details
Name: | maa_EquityLineItems
Namespace Prefix: | maa_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity sale, forward price per share. + References No definition available. + Details
Name: | maa_EquitySaleForwardPricePerShare
Namespace Prefix: | maa_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity sale settled shares amount. + References No definition available. + Details
Name: | maa_EquitySaleSettledSharesAmount
Namespace Prefix: | maa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of shares remaining for issuance. + References No definition available. + Details
Name: | maa_NumberOfSharesRemainingForIssuance
Namespace Prefix: | maa_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares authorized for issuance under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | us-gaap_SharesIssuedPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=maa_EquityForwardSaleAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=maa_AtTheMarketOfferingMember
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: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_NoncontrollingInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |