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MAA Equity - Summary of Changes in Total Equity and its Components (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance |  |  | $ 6,125,434 |
Ending Balance | $ 5,994,079 |  | 5,994,079 |
Mid America Apartment Communities Inc. Shareholders Equity [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 6,069,265 | $ 6,186,232 | 6,125,434 | $ 6,279,955
Net income | 102,044 | 118,230 | 399,325 | 370,502
Other comprehensive income - derivative instruments | 430 | 428 | 1,288 | 1,448
Issuance and registration of common shares | 144 | 8 | (805) | (789)
Shares repurchased and retired | (29) |  | (3,100) | (4,974)
Exercise of stock options |  |  | 38 |
Shares issued in exchange for redeemable stock |  |  | 2,109 | 2,069
Redeemable stock fair market value adjustment | 1,189 | (2,282) | 2,018 | (3,325)
Amortization of unearned compensation | 3,620 | 3,539 | 13,296 | 13,869
Dividends on preferred stock | (922) | (922) | (2,766) | (2,766)
Dividends on common stock | (177,377) | (171,814) | (531,945) | (515,359)
Distributions on noncontrolling interests units | (4,457) | (4,521) | (13,563) | (13,638)
Contribution from noncontrolling interest | 172 | 2,696 | 2,750 | 4,602
Ending Balance | 5,994,079 | 6,131,594 | 5,994,079 | 6,131,594
Mid America Apartment Communities Inc. Shareholders Equity [Member] | Preferred Stock [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 9 | 9 | 9 | 9
Ending Balance | 9 | 9 | 9 | 9
Mid America Apartment Communities Inc. Shareholders Equity [Member] | Common Stock [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 1,168 | 1,166 | 1,166 | 1,168
Issuance and registration of common shares |  |  | 1 | 2
Shares repurchased and retired |  |  |  | (1)
Shares issued in exchange for common units |  |  | 1 | 1
Shares issued in exchange for redeemable stock |  |  |  | (4)
Ending Balance | 1,168 | 1,166 | 1,168 | 1,166
Mid America Apartment Communities Inc. Shareholders Equity [Member] | Additional Paid-in Capital [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 7,431,627 | 7,409,258 | 7,417,453 | 7,399,921
Issuance and registration of common shares | 144 | 8 | (806) | (791)
Shares repurchased and retired | (29) |  | (3,100) | (4,973)
Exercise of stock options |  |  | 38 |
Shares issued in exchange for common units | 391 | 926 | 6,758 | 3,528
Shares issued in exchange for redeemable stock |  |  | 2,109 | 2,073
Adjustment for noncontrolling interests in Operating Partnership | (56) | (57) | (51) | 47
Amortization of unearned compensation | 3,620 | 3,539 | 13,296 | 13,869
Ending Balance | 7,435,697 | 7,413,674 | 7,435,697 | 7,413,674
Mid America Apartment Communities Inc. Shareholders Equity [Member] | Accumulated Distributions in Excess of Net Income [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | (1,535,340) | (1,398,993) | (1,469,557) | (1,298,263)
Net income attributable to MAA | 99,538 | 115,195 | 389,338 | 360,897
Redeemable stock fair market value adjustment | 1,189 | (2,282) | 2,018 | (3,325)
Dividends on preferred stock | (922) | (922) | (2,766) | (2,766)
Dividends on common stock | (177,377) | (171,814) | (531,945) | (515,359)
Ending Balance | (1,612,912) | (1,458,816) | (1,612,912) | (1,458,816)
Mid America Apartment Communities Inc. Shareholders Equity [Member] | Accumulated Other Comprehensive Loss [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | (6,110) | (7,775) | (6,940) | (8,764)
Other comprehensive income - derivative instruments | 418 | 416 | 1,248 | 1,405
Ending Balance | (5,692) | (7,359) | (5,692) | (7,359)
Mid America Apartment Communities Inc. Shareholders Equity [Member] | Noncontrolling Interests - Operating Partnership [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 147,439 | 157,905 | 155,409 | 163,128
Net Income attributable to noncontrolling interest | 2,506 | 3,035 | 9,987 | 9,605
Other comprehensive income - derivative instruments | 12 | 12 | 40 | 43
Shares issued in exchange for common units | (391) | (926) | (6,759) | (3,529)
Adjustment for noncontrolling interests in Operating Partnership | 56 | 57 | 51 | (47)
Distributions on noncontrolling interests units | (4,457) | (4,521) | (13,563) | (13,638)
Ending Balance | 145,165 | 155,562 | 145,165 | 155,562
Mid America Apartment Communities Inc. Shareholders Equity [Member] | Noncontrolling Interests - Consolidated Real Estate Entities [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 30,472 | 24,662 | 27,894 | 22,756
Contribution from noncontrolling interest | 172 | 2,696 | 2,750 | 4,602
Ending Balance | $ 30,644 | $ 27,358 | $ 30,644 | $ 27,358

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