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MAA Equity - Summary of Changes in Total Equity and its Components (Details) - Mid America Apartment Communities Inc. Shareholders Equity [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | $ 6,350,072 | $ 6,168,116 | $ 6,189,748 | $ 6,153,907
Net Income Including Portion Attributable to Noncontrolling Interest | 113,732 | 125,703 | 402,963 | 455,840
Other comprehensive income - derivative instruments | 279 | 279 | 835 | 835
Issuance and registration of common shares | 158 | 156 | 203,214 | (276)
Shares repurchased and retired | (26) | (12) | (7,866) | (14,043)
Exercise of stock options |  |  |  | 28
Shares issued in exchange for redeemable stock |  |  | 581 |
Redeemable stock fair market value adjustment | 3,242 | 2,537 | 3,906 | 9,297
Amortization of unearned compensation | 4,128 | 4,203 | 14,299 | 15,532
Dividends, Preferred Stock, Cash | (922) | (922) | (2,766) | (2,766)
Dividends on common stock | (163,362) | (144,309) | (490,044) | (414,138)
Dividends on noncontrolling interest units | (4,408) | (3,996) | (13,242) | (11,477)
Acquisition of noncontrolling interest |  |  |  | (43,070)
Contribution from noncontrolling interest | 696 |  | 1,961 | 2,086
Ending Balance | 6,303,589 | 6,151,755 | 6,303,589 | 6,151,755
Preferred Stock [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 9 | 9 | 9 | 9
Ending Balance | 9 | 9 | 9 | 9
Common Stock [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 1,168 | 1,152 | 1,152 | 1,151
Issuance and registration of common shares |  |  | 12 | 1
Shares issued in exchange for redeemable stock |  |  | 4 |
Ending Balance | 1,168 | 1,152 | 1,168 | 1,152
Additional Paid-in Capital [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 7,405,572 | 7,191,920 | 7,202,834 | 7,230,956
Issuance and registration of common shares | 158 | 156 | 203,202 | (277)
Shares repurchased and retired | (26) | (12) | (7,866) | (14,043)
Exercise of stock options |  |  |  | 28
Shares issued in exchange for common units | 363 | 307 | 894 | 500
Shares issued in exchange for redeemable stock |  |  | 577 |
Adjustment for noncontrolling interests in Operating Partnership | (86) | (70) | (3,831) | 1,251
Amortization of unearned compensation | 4,128 | 4,203 | 14,299 | 15,532
Acquisition of noncontrolling interest |  |  |  | (37,443)
Ending Balance | 7,410,109 | 7,196,504 | 7,410,109 | 7,196,504
Accumulated Distributions in Excess of Net Income [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | (1,235,118) | (1,199,216) | (1,188,854) | (1,255,807)
Net income attributable to MAA | 110,732 | 122,311 | 392,330 | 443,815
Redeemable stock fair market value adjustment | 3,242 | 2,537 | 3,906 | 9,297
Dividends, Preferred Stock, Cash | (922) | (922) | (2,766) | (2,766)
Dividends on common stock | (163,362) | (144,309) | (490,044) | (414,138)
Ending Balance | (1,285,428) | (1,219,599) | (1,285,428) | (1,219,599)
Accumulated Other Comprehensive Loss [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | (9,514) | (10,591) | (10,052) | (11,132)
Other comprehensive income - derivative instruments | 270 | 270 | 808 | 811
Ending Balance | (9,244) | (10,321) | (9,244) | (10,321)
Noncontrolling Interests - Operating Partnership [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 165,626 | 165,062 | 163,595 | 165,116
Net Income Attributable to Noncontrolling Interest | 3,000 | 3,392 | 10,633 | 12,318
Other comprehensive income - derivative instruments | 9 | 9 | 27 | 24
Shares issued in exchange for common units | (363) | (307) | (894) | (500)
Adjustment for noncontrolling interests in Operating Partnership | 86 | 70 | 3,831 | (1,251)
Dividends on noncontrolling interest units | (4,408) | (3,996) | (13,242) | (11,477)
Ending Balance | 163,950 | 164,230 | 163,950 | 164,230
Noncontrolling Interests - Consolidated Real Estate Entities [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 22,329 | 19,780 | 21,064 | 23,614
Net Income Attributable to Noncontrolling Interest |  |  |  | (293)
Acquisition of noncontrolling interest |  |  |  | (5,627)
Contribution from noncontrolling interest | 696 |  | 1,961 | 2,086
Ending Balance | $ 23,025 | $ 19,780 | $ 23,025 | $ 19,780

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