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MAA Equity (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Accumulated Distributions in Excess of Net Income [Member] |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning Balance |  |  |  | $ (634,141,000) |
Net income attributable to MAA |  |  |  | 172,836,000 |
Redeemable stock fair market value |  |  |  | (296,000) |
Dividends on common stock |  |  |  | (185,789,000) |
Ending Balance |  | $ (647,390,000) |  | (647,390,000) |
Common Stock [Member] |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning Balance |  |  |  | 753,000 |
Issuance and registration of common shares |  |  |  | 1,000 |
Shares repurchased and retired |  |  |  | 0 |
Shares issued in exchange for units |  |  |  | 0 |
Ending Balance |  | 754,000 |  | 754,000 |
Additional Paid-in Capital [Member] |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning Balance |  |  |  | 3,627,074,000 |
Issuance and registration of common shares |  |  |  | (739,000) |
Shares repurchased and retired |  |  |  | (1,811,000) |
Shares issued in exchange for units |  |  |  | 780,000 |
Shares issued in exchange for redeemable stock |  |  |  | 122,000 |
Adjustment for noncontrolling interest ownership in operating partnership |  |  |  | (38,000) |
Amortization of unearned compensation |  |  |  | 6,625,000 |
Ending Balance |  | 3,632,013,000 |  | 3,632,013,000 |
Noncontrolling Interest [Member] |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning Balance |  |  |  | 165,726,000 |
Net Income Attributable to Noncontrolling Interest |  |  |  | 9,508,000 |
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) |  |  |  | (25,000) |
Shares issued in exchange for units |  |  |  | (780,000) |
Adjustment for noncontrolling interest ownership in operating partnership |  |  |  | 38,000 |
Dividends on common stock |  |  |  | 0 |
Dividends on noncontrolling interest units |  |  |  | (10,217,000) |
Ending Balance |  | 164,250,000 |  | 164,250,000 |
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning Balance |  |  |  | (1,589,000) |
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) |  |  |  | (456,000) |
Ending Balance |  | (2,045,000) |  | (2,045,000) |
Parent Company [Member] |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | $ 118,958,000 | $ 88,906,000 | $ 212,529,000 | $ 182,344,000 |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | 6,548,320,000 |  | 6,548,320,000 |  | $ 6,639,795,000
Noncontrolling Interest in Joint Ventures | $ 2,306,000 |  | $ 2,306,000 |  | 2,306,000
Common Stock, Dividends, Per Share, Declared | $ 0.87 | $ 0.82 | $ 2.61 | $ 2.46 |
Distribution Made to Limited Partner, Distributions Declared, Per Unit |  |  | $ 2.61 | $ 2.46 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Issuance and registration of common shares |  |  | $ 2,007,000 |  |
Proceeds from Issuance of Common Stock |  |  | 1,007,000 | $ (216,000) |
Dividends, Preferred Stock, Cash |  |  | (2,766,000) | 0 |
Parent Company [Member] | Accumulated Distributions in Excess of Net Income [Member] |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning Balance |  |  | (707,479,000) |  |
Net income attributable to MAA |  |  | 204,929,000 |  |
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) |  |  | 0 |  |
Issuance and registration of common shares |  |  | 0 |  |
Shares repurchased and retired |  |  | 0 |  |
Stock Issued During Period, Value, Stock Options Exercised |  |  | 0 |  |
Shares issued in exchange for units |  |  | 0 |  |
Redeemable stock fair market value |  |  | (870,000) |  |
Adjustment for noncontrolling interest ownership in operating partnership |  |  | 0 |  |
Amortization of unearned compensation |  |  | (114,000) |  |
Dividends, Preferred Stock, Cash |  |  | (2,766,000) |  |
Dividends on common stock |  |  | (296,535,000) |  |
Dividends on noncontrolling interest units |  |  | 0 |  |
Ending Balance | $ (802,835,000) |  | (802,835,000) |  |
Parent Company [Member] | Preferred Stock [Member] |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | 9,000 |  | 9,000 |  | $ 9,000
Parent Company [Member] | Common Stock [Member] |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning Balance |  |  | 1,133,000 |  |
Issuance and registration of common shares |  |  | 1,000 |  |
Shares repurchased and retired |  |  | 0 |  |
Stock Issued During Period, Value, Stock Options Exercised |  |  | 0 |  |
Shares issued in exchange for units |  |  | 0 |  |
Ending Balance | 1,134,000 |  | 1,134,000 |  |
Parent Company [Member] | Additional Paid-in Capital [Member] |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  |  | 0 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning Balance |  |  | 7,109,012,000 |  |
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) |  |  | 0 |  |
Issuance and registration of common shares |  |  | 2,007,000 |  |
Proceeds from Issuance of Common Stock |  |  | 153,000 |  |
Shares repurchased and retired |  |  | (4,782,000) |  |
Stock Issued During Period, Value, Stock Options Exercised |  |  | 218,000 |  |
Shares issued in exchange for units |  |  | 1,133,000 |  |
Shares issued in exchange for redeemable stock |  |  | 1,482,000 |  |
Redeemable stock fair market value |  |  | 0 |  |
Adjustment for noncontrolling interest ownership in operating partnership |  |  | 54,000 |  |
Amortization of unearned compensation |  |  | 8,552,000 |  |
Dividends on common stock |  |  | 0 |  |
Dividends on noncontrolling interest units |  |  | 0 |  |
Ending Balance | 7,117,829,000 |  | 7,117,829,000 |  |
Parent Company [Member] | Noncontrolling Interest [Member] |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning Balance |  |  | 235,976,000 |  |
Net Income Attributable to Noncontrolling Interest |  |  | 7,600,000 |  |
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) |  |  | (14,000) |  |
Issuance and registration of common shares |  |  | 0 | 0 |
Shares repurchased and retired |  |  | 0 |  |
Stock Issued During Period, Value, Stock Options Exercised |  |  | 0 |  |
Shares issued in exchange for units |  |  | (1,133,000) |  |
Redeemable stock fair market value |  |  | 0 |  |
Adjustment for noncontrolling interest ownership in operating partnership |  |  | (54,000) |  |
Amortization of unearned compensation |  |  | 0 |  |
Dividends on common stock |  |  | 0 |  |
Dividends on noncontrolling interest units |  |  | (10,982,000) |  |
Ending Balance | 231,393,000 |  | 231,393,000 |  |
Parent Company [Member] | Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  |  | 0 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning Balance |  |  | 1,144,000 |  |
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) |  |  | (354,000) |  |
Issuance and registration of common shares |  |  | 0 |  |
Shares repurchased and retired |  |  | 0 |  |
Stock Issued During Period, Value, Stock Options Exercised |  |  | 0 |  |
Shares issued in exchange for units |  |  | 0 |  |
Redeemable stock fair market value |  |  | 0 |  |
Adjustment for noncontrolling interest ownership in operating partnership |  |  | 0 |  |
Amortization of unearned compensation |  |  | 0 |  |
Dividends on common stock |  |  | 0 |  |
Dividends on noncontrolling interest units |  |  | 0 |  |
Ending Balance | 790,000 |  | 790,000 |  |
Stockholders' Equity, Total [Member] |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning Balance |  |  |  | 3,157,823,000 |
Net Income Including Portion Attributable to Noncontrolling Interest |  |  |  | 182,344,000 |
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) |  |  |  | (481,000) |
Issuance and registration of common shares |  |  |  | (738,000) |
Shares repurchased and retired |  |  |  | (1,811,000) |
Shares issued in exchange for units |  |  |  | 0 |
Shares issued in exchange for redeemable stock |  |  |  | 122,000 |
Redeemable stock fair market value |  |  |  | (296,000) |
Adjustment for noncontrolling interest ownership in operating partnership |  |  |  | 0 |
Amortization of unearned compensation |  |  |  | 6,625,000 |
Dividends on common stock |  |  |  | (185,789,000) |
Dividends on noncontrolling interest units |  |  |  | (10,217,000) |
Ending Balance |  | $ 3,147,582,000 |  | $ 3,147,582,000 |
Stockholders' Equity, Total [Member] | Parent Company [Member] |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning Balance |  |  | 6,642,101,000 |  |
Net Income Including Portion Attributable to Noncontrolling Interest |  |  | 212,529,000 |  |
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) |  |  | (368,000) |  |
Issuance and registration of common shares |  |  | 154,000 |  |
Shares repurchased and retired |  |  | (4,782,000) |  |
Stock Issued During Period, Value, Stock Options Exercised |  |  | 218,000 |  |
Shares issued in exchange for units |  |  | 0 |  |
Shares issued in exchange for redeemable stock |  |  | 1,482,000 |  |
Redeemable stock fair market value |  |  | (870,000) |  |
Adjustment for noncontrolling interest ownership in operating partnership |  |  | 0 |  |
Amortization of unearned compensation |  |  | 8,438,000 |  |
Dividends on common stock |  |  | (296,535,000) |  |
Dividends on noncontrolling interest units |  |  | (10,982,000) |  |
Ending Balance | $ 6,550,626,000 |  | $ 6,550,626,000 |  |

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