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MAA Equity - Summary of Changes in Total Equity and its Components (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
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 | 6,289,459 | 6,372,189
Net Income Including Portion Attributable to Noncontrolling Interest | 37,952 | 65,958
Other comprehensive income (loss) - derivatives instruments (cash flow hedges) | 253 | (3,201)
Issuance and registration of common shares | 39 | 1,129
Shares repurchased and retired | (1,727) | (3,023)
Exercise of stock options | 71 | 208
Redeemable stock fair market value adjustment | 3,111 | (1,351)
Amortization of unearned compensation | 5,289 | 4,785
Dividends, Preferred Stock, Cash | (922) | (922)
Dividends on common stock | (114,302) | (109,392)
Dividends on noncontrolling interest units | (4,059) | (3,941)
Contribution from noncontrolling interest | 401 | 2,860
Ending Balance | 6,215,565 | 6,325,299
Preferred Stock [Member] | Mid America Apartment Communities Inc Shareholders Equity |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | 9 | 9
Ending Balance | 9 | 9
Common Stock [Member] | Mid America Apartment Communities Inc Shareholders Equity |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | 1,140 | 1,136
Issuance and registration of common shares |  | 1
Ending Balance | 1,140 | 1,137
Additional Paid-in Capital [Member] | Mid America Apartment Communities Inc Shareholders Equity |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | 7,166,073 | 7,138,170
Issuance and registration of common shares | 39 | 1,128
Shares repurchased and retired | (1,727) | (3,023)
Exercise of stock options | 71 | 208
Shares issued in exchange for units | 450 | 336
Adjustment for noncontrolling interests in Operating Partnership | (47) | (60)
Amortization of unearned compensation | 5,289 | 4,785
Ending Balance | 7,170,148 | 7,141,544
Accumulated Distributions in Excess of Net Income [Member] | Mid America Apartment Communities Inc Shareholders Equity |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | (1,085,479) | (989,263)
Net income attributable to MAA | 36,648 | 63,660
Redeemable stock fair market value adjustment | 3,111 | (1,351)
Dividends, Preferred Stock, Cash | (922) | (922)
Dividends on common stock | (114,302) | (109,392)
Ending Balance | (1,160,944) | (1,037,268)
Accumulated Other Comprehensive Income (Loss) [Member] | Mid America Apartment Communities Inc Shareholders Equity |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | (13,178) | (212)
Other comprehensive income (loss) - derivatives instruments (cash flow hedges) | 244 | (3,088)
Ending Balance | (12,934) | (3,300)
Noncontrolling Interest Operating Partnership | Mid America Apartment Communities Inc Shareholders Equity |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | 214,647 | 220,043
Net Income Attributable to Noncontrolling Interest | 1,304 | 2,298
Other comprehensive income (loss) - derivatives instruments (cash flow hedges) | 9 | (113)
Shares issued in exchange for units | (450) | (336)
Adjustment for noncontrolling interests in Operating Partnership | 47 | 60
Dividends on noncontrolling interest units | (4,059) | (3,941)
Ending Balance | 211,498 | 218,011
Noncontrolling Interest | Mid America Apartment Communities Inc Shareholders Equity |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning Balance | 6,247 | 2,306
Contribution from noncontrolling interest | 401 | 2,860
Ending Balance | $ 6,648 | $ 5,166

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