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Shareholders' Equity of MAA - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Aug. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Nov. 30, 2021
Equity [Line Items] |  |  |  |  |
Common stock, shares outstanding |  | 115,336,876 | 114,373,727 |  |
Total common shares and operating partnership units outstanding |  | 118,542,994 | 118,431,384 |  |
Common stock, shares authorized |  | 145,000,000 | 145,000,000 |  |
At The Market Offering |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Common stock shares sold |  | 0 | 0 | 146,301 |
Net proceeds from share issued |  |  |  | $ 19,600 |
Remaining common stock to sale |  | 4,000,000.0 |  |  |
Maximum [Member] | At The Market Offering |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  |  |  |  | 4,000,000.0
Dividend And Distribution Reinvestment And Share Purchase Plan |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Common stock issued for shareholders to reinvest distributions (shares) |  | 6,301 | 8,259 | 16,219 |
Dividend And Distribution Reinvestment And Share Purchase Plan | Minimum [Member] |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Optional cash investments in common shares |  | $ 250 |  |  |
Dividend And Distribution Reinvestment And Share Purchase Plan | Maximum [Member] |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Optional cash investments in common shares |  | $ 5,000 |  |  |
Common stock, shares authorized |  | 1,906,762 |  |  |
Discount rate on sale of common stock (percent) |  | 5.00% |  |  |
Equity Forward Sale Agreements [Member] |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Issuance and registration of common shares, Shares | 1,100,000 |  |  |  |
Common stock, price per share | $ 190.56 |  |  |  |
Common stock settlement under agreement | 0 |  |  |  |
Common shares attributable to dilutive effect of equity forward agreements |  | 0 |  |  |
Noncontrolling Interest [Member] |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Common Shares Issuable Upon Conversion Of Convertible Stock |  | 3,206,118 | 4,057,657 |  |

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- Definition Common Shares Issuable upon Conversion of Convertible Stock + References No definition available. + Details
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- Definition Common Stock, Discount Rate + References No definition available. + Details
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- Definition Common stock settlement under agreement. + References No definition available. + Details
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- Definition Number of shares remaining for issuance. + References No definition available. + Details
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