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MAA Equity | 3 Months Ended
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Mar. 31, 2017
MAA Equity [Abstract] |
Consolidated Statements of Equity [Text Block] | MAA Equity Changes in total equity and its components for the three-month periods ended March 31, 2017 and 2016 were as follows (dollars in thousands, except per share and per unit data):
| Mid-America Apartment Communities, Inc. Shareholders' Equity |  |  |  |  |  |
| Preferred Stock Amount |  | Common Stock Amount |  | Additional Paid-In Capital |  | Accumulated Distributions in Excess of Net Income |  | Accumulated Other Comprehensive Income (Loss) |  | Noncontrolling Interest Operating Partnership |  | Noncontrolling Interest - Consolidated Real Estate Entity |  | Total Equity
EQUITY BALANCE DECEMBER 31, 2016 | $ | 9 |  |  | $ | 1,133 |  |  | $ | 7,109,012 |  |  | $ | (707,479 | ) |  | $ | 1,144 |  |  | $ | 235,976 |  |  | $ | 2,306 |  |  | $ | 6,642,101 |
Net income attributable to controlling interest | — |  |  | — |  |  | — |  |  | 41,905 |  |  | — |  |  | 1,511 |  |  | — |  |  | 43,416 |
Other comprehensive income - derivative instruments (cash flow hedges) | — |  |  | — |  |  | — |  |  | — |  |  | 3,079 |  |  | 113 |  |  | — |  |  | 3,192 |
Issuance and registration of common shares | — |  |  | 1 |  |  | 67 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 68 |
Issuance and registration of preferred shares | — |  |  | — |  |  | 2,007 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 2,007 |
Shares repurchased and retired | — |  |  | — |  |  | (4,734 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (4,734 | )
Shares issued in exchange for common units | — |  |  | — |  |  | 167 |  |  | — |  |  | — |  |  | (167 | ) |  | — |  |  | — |
Shares issued in exchange for redeemable stock | — |  |  | — |  |  | 1,482 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,482 |
Redeemable stock fair market value adjustment | — |  |  | — |  |  | — |  |  | (298 | ) |  | — |  |  | — |  |  | — |  |  | (298 | )
Adjustment for noncontrolling interest ownership in operating partnership | — |  |  | — |  |  | 305 |  |  | — |  |  | — |  |  | (305 | ) |  | — |  |  | — |
Amortization of unearned compensation | — |  |  | — |  |  | 3,139 |  |  | (114 | ) |  | — |  |  | — |  |  | — |  |  | 3,025 |
Dividends on preferred stock | — |  |  | — |  |  | — |  |  | (922 | ) |  | — |  |  | — |  |  | — |  |  | (922 | )
Dividends on common stock ($0.87 per share) | — |  |  | — |  |  | — |  |  | (98,841 | ) |  | — |  |  | — |  |  | — |  |  | (98,841 | )
Dividends on noncontrolling interest units ($0.87 per unit) | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (3,664 | ) |  | — |  |  | (3,664 | )
EQUITY BALANCE MARCH 31, 2017 | $ | 9 |  |  | $ | 1,134 |  |  | $ | 7,111,445 |  |  | $ | (765,749 | ) |  | $ | 4,223 |  |  | $ | 233,464 |  |  | $ | 2,306 |  |  | $ | 6,586,832 |
| Mid-America Apartment Communities, Inc. Shareholders' Equity |  |  |  |  |  |
| Preferred Stock Amount |  | Common Stock Amount |  | Additional Paid-In Capital |  | Accumulated Distributions in Excess of Net Income |  | Accumulated Other Comprehensive Income (Loss) |  | Noncontrolling Interest Operating Partnership |  | Noncontrolling Interest - Consolidated Real Estate Entity |  | Total Equity
EQUITY BALANCE DECEMBER 31, 2015 | $ | — |  |  | $ | 753 |  |  | $ | 3,627,074 |  |  | $ | (634,141 | ) |  | $ | (1,589 | ) |  | $ | 165,726 |  |  | $ | — |  |  | $ | 3,157,823 |
Net income attributable to controlling interest | — |  |  | — |  |  | — |  |  | 43,413 |  |  | — |  |  | 2,395 |  |  | — |  |  | 45,808 |
Other comprehensive loss - derivative instruments (cash flow hedges) | — |  |  | — |  |  | — |  |  | — |  |  | (2,387 | ) |  | (132 | ) |  | — |  |  | (2,519 | )
Issuance and registration of common shares | — |  |  | 1 |  |  | 89 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 90 |
Shares repurchased and retired | — |  |  | — |  |  | (1,730 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | (1,730 | )
Shares issued in exchange for common units | — |  |  | — |  |  | 33 |  |  | — |  |  | — |  |  | (33 | ) |  | — |  |  | — |
Shares issued in exchange for redeemable stock | — |  |  | — |  |  | 123 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 123 |
Redeemable stock fair market value adjustment | — |  |  | — |  |  | — |  |  | (1,100 | ) |  | — |  |  | — |  |  | — |  |  | (1,100 | )
Adjustment for noncontrolling interest ownership in operating partnership | — |  |  | — |  |  | 40 |  |  | — |  |  | — |  |  | (40 | ) |  | — |  |  | — |
Amortization of unearned compensation | — |  |  | — |  |  | 2,078 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 2,078 |
Dividends on common stock ($0.82 per share) | — |  |  | — |  |  | — |  |  | (61,928 | ) |  | — |  |  | — |  |  | — |  |  | (61,928 | )
Dividends on noncontrolling interest units ($0.82 per unit) | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (3,412 | ) |  | — |  |  | (3,412 | )
EQUITY BALANCE MARCH 31, 2016 | $ | — |  |  | $ | 754 |  |  | $ | 3,627,707 |  |  | $ | (653,756 | ) |  | $ | (3,976 | ) |  | $ | 164,504 |  |  | $ | — |  |  | $ | 3,135,233 |

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- Definition Consolidated Statements of Equity [Text Block] + References No definition available. + Details
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Namespace Prefix: | maa_
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- Definition MAA Equity [Abstract] + References No definition available. + Details
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Namespace Prefix: | maa_
Data Type: | xbrli:stringItemType
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Period Type: | duration