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MAA Equity - Summary of Changes in Total Equity and its Components (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Dividends, Preferred Stock, Cash | $ (922) | $ (922)
Mid America Apartment Communities Inc Shareholders Equity |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | 6,088,408 | 6,289,459
Net Income Including Portion Attributable to Noncontrolling Interest | 48,864 | 37,952
Other comprehensive income (loss) - derivatives instruments (cash flow hedges) | 279 | 253
Issuance and registration of common shares | 134 | 39
Shares repurchased and retired | (1,730) | (1,727)
Exercise of stock options | 1,466 | 71
Redeemable stock fair market value adjustment | (2,158) | 3,111
Amortization of unearned compensation | 5,993 | 5,289
Dividends, Preferred Stock, Cash | (922) | (922)
Dividends on common stock | (117,278) | (114,302)
Dividends on noncontrolling interest units | (4,156) | (4,059)
Contribution from noncontrolling interest | 633 | 401
Ending Balance | 6,019,533 | 6,215,565
Mid America Apartment Communities Inc Shareholders Equity | Preferred Stock [Member] |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | 9 | 9
Ending Balance | 9 | 9
Mid America Apartment Communities Inc Shareholders Equity | Common Stock [Member] |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | 1,141 | 1,140
Issuance and registration of common shares | 1 |
Ending Balance | 1,142 | 1,140
Mid America Apartment Communities Inc Shareholders Equity | Additional Paid-in Capital [Member] |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | 7,176,793 | 7,166,073
Issuance and registration of common shares | 133 | 39
Shares repurchased and retired | (1,730) | (1,727)
Exercise of stock options | 1,466 | 71
Shares issued in exchange for common units | 232 | 450
Adjustment for noncontrolling interests in Operating Partnership | (116) | (47)
Amortization of unearned compensation | 5,993 | 5,289
Ending Balance | 7,182,771 | 7,170,148
Mid America Apartment Communities Inc Shareholders Equity | Accumulated Distributions in Excess of Net Income [Member] |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | (1,294,182) | (1,085,479)
Net income attributable to MAA | 47,193 | 36,648
Redeemable stock fair market value adjustment | (2,158) | 3,111
Dividends, Preferred Stock, Cash | (922) | (922)
Dividends on common stock | (117,278) | (114,302)
Ending Balance | (1,367,347) | (1,160,944)
Mid America Apartment Communities Inc Shareholders Equity | Accumulated Other Comprehensive Income (Loss) [Member] |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | (12,128) | (13,178)
Other comprehensive income (loss) - derivatives instruments (cash flow hedges) | 269 | 244
Ending Balance | (11,859) | (12,934)
Mid America Apartment Communities Inc Shareholders Equity | Noncontrolling Interest Operating Partnership |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | 206,927 | 214,647
Net Income Attributable to Noncontrolling Interest | 1,671 | 1,304
Other comprehensive income (loss) - derivatives instruments (cash flow hedges) | 10 | 9
Shares issued in exchange for common units | (232) | (450)
Adjustment for noncontrolling interests in Operating Partnership | 116 | 47
Dividends on noncontrolling interest units | (4,156) | (4,059)
Ending Balance | 204,336 | 211,498
Mid America Apartment Communities Inc Shareholders Equity | Noncontrolling Interest |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | 9,848 | 6,247
Contribution from noncontrolling interest | 633 | 401
Ending Balance | $ 10,481 | $ 6,648

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