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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, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Dividends, Preferred Stock, Cash | $ (922) | $ (922) | $ (2,766) | $ (2,766)
Mid America Apartment Communities Inc. Shareholders Equity [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 6,168,116 | 6,120,667 | 6,153,907 | 6,088,408
Net Income Including Portion Attributable to Noncontrolling Interest | 125,703 | 87,047 | 455,840 | 359,786
Other comprehensive income - derivative instruments | 279 | 278 | 835 | 835
Issuance and registration of common shares | 156 | (103) | (276) | (436)
Shares repurchased and retired | (12) |  | (14,043) | (9,043)
Exercise of stock options |  | 12 | 28 | 1,478
Redeemable stock fair market value adjustment | 2,537 | (2,356) | 9,297 | (7,545)
Amortization of unearned compensation | 4,203 | 4,007 | 15,532 | 14,151
Dividends, Preferred Stock, Cash | (922) | (922) | (2,766) | (2,766)
Dividends on common stock | (144,309) | (118,018) | (414,138) | (353,168)
Dividends on noncontrolling interest units | (3,996) | (3,486) | (11,477) | (11,338)
Acquisition of noncontrolling interest |  |  | (43,070) |
Contribution from noncontrolling interest |  | 3,204 | 2,086 | 9,968
Ending Balance | 6,151,755 | 6,090,330 | 6,151,755 | 6,090,330
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 | 1,152 | 1,147 | 1,151 | 1,141
Issuance and registration of common shares |  |  | 1 | 2
Shares issued in exchange for common units |  | 2 |  | 6
Ending Balance | 1,152 | 1,149 | 1,152 | 1,149
Mid America Apartment Communities Inc. Shareholders Equity [Member] | Additional Paid-in Capital [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 7,191,920 | 7,201,885 | 7,230,956 | 7,176,793
Issuance and registration of common shares | 156 | (103) | (277) | (438)
Shares repurchased and retired | (12) |  | (14,043) | (9,043)
Exercise of stock options |  | 12 | 28 | 1,478
Shares issued in exchange for common units | 307 | 11,106 | 500 | 33,266
Adjustment for noncontrolling interests in Operating Partnership | (70) | (22) | 1,251 | 678
Amortization of unearned compensation | 4,203 | 4,007 | 15,532 | 14,151
Acquisition of noncontrolling interest |  |  | (37,443) |
Ending Balance | 7,196,504 | 7,216,885 | 7,196,504 | 7,216,885
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 | (1,199,216) | (1,272,694) | (1,255,807) | (1,294,182)
Net income attributable to MAA | 122,311 | 84,479 | 443,815 | 348,150
Redeemable stock fair market value adjustment | 2,537 | (2,356) | 9,297 | (7,545)
Dividends, Preferred Stock, Cash | (922) | (922) | (2,766) | (2,766)
Dividends on common stock | (144,309) | (118,018) | (414,138) | (353,168)
Ending Balance | (1,219,599) | (1,309,511) | (1,219,599) | (1,309,511)
Mid America Apartment Communities Inc. Shareholders Equity [Member] | Accumulated Other Comprehensive Loss [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | (10,591) | (11,632) | (11,132) | (12,128)
Other comprehensive income - derivative instruments | 270 | 248 | 811 | 744
Ending Balance | (10,321) | (11,384) | (10,321) | (11,384)
Mid America Apartment Communities Inc. Shareholders Equity [Member] | Noncontrolling Interests - Operating Partnership [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 165,062 | 185,340 | 165,116 | 206,927
Net Income Attributable to Noncontrolling Interest | 3,392 | 2,568 | 12,318 | 11,636
Other comprehensive income - derivative instruments | 9 | 30 | 24 | 91
Shares issued in exchange for common units | (307) | (11,108) | (500) | (33,272)
Adjustment for noncontrolling interests in Operating Partnership | 70 | 22 | (1,251) | (678)
Dividends on noncontrolling interest units | (3,996) | (3,486) | (11,477) | (11,338)
Ending Balance | 164,230 | 173,366 | 164,230 | 173,366
Mid America Apartment Communities Inc. Shareholders Equity [Member] | Noncontrolling Interests - Consolidated Real Estate Entities [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning Balance | 19,780 | 16,612 | 23,614 | 9,848
Net Income Attributable to Noncontrolling Interest |  |  | (293) |
Acquisition of noncontrolling interest |  |  | (5,627) |
Contribution from noncontrolling interest |  | 3,204 | 2,086 | 9,968
Ending Balance | $ 19,780 | $ 19,816 | $ 19,780 | $ 19,816

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