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MAA Equity (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Dividends, Preferred Stock, Cash |  |  |  | $ 0 |
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 |  |  |  | 88,557,000 |
Redeemable stock fair market value |  |  |  | (1,518,000) |
Dividends on common stock |  |  |  | (123,852,000) |
Ending Balance |  | $ (670,954,000) |  | (670,954,000) |
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 |  |  |  | 185,000 |
Shares repurchased and retired |  |  |  | (1,742,000) |
Shares issued in exchange for units |  |  |  | 158,000 |
Shares issued in exchange for redeemable stock |  |  |  | 123,000 |
Adjustment for noncontrolling interest ownership in operating partnership |  |  |  | (87,000) |
Amortization of unearned compensation |  |  |  | 4,383,000 |
Ending Balance |  | 3,630,094,000 |  | 3,630,094,000 |
Noncontrolling Interest [Member] |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning Balance |  |  |  | 165,726,000 |
Net Income Attributable to Noncontrolling Interest |  |  |  | 4,881,000 |
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) |  |  |  | (141,000) |
Shares issued in exchange for units |  |  |  | (158,000) |
Adjustment for noncontrolling interest ownership in operating partnership |  |  |  | 87,000 |
Dividends on common stock |  |  |  | 0 |
Dividends on noncontrolling interest units |  |  |  | (6,820,000) |
Ending Balance |  | 163,575,000 |  | 163,575,000 |
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) |  |  |  | (2,561,000) |
Ending Balance |  | (4,150,000) |  | (4,150,000) |
Parent Company [Member] |  |  |  |  |
Equity [Line Items] |  |  |  |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | $ 50,155,000 | 47,630,000 | $ 93,571,000 | 93,438,000 |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | 6,529,936,000 |  | 6,529,936,000 |  | $ 6,639,795,000
Noncontrolling Interest in Joint Ventures | 2,306,000 |  | 2,306,000 |  | 2,306,000
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  | 783,000 | 628,000 |
Dividends, Preferred Stock, Cash |  |  | (1,844,000) |  |
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 |  |  | 90,220,000 |  |
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 |  |  | (719,000) |  |
Adjustment for noncontrolling interest ownership in operating partnership |  |  | 0 |  |
Amortization of unearned compensation |  |  | (114,000) |  |
Dividends, Preferred Stock, Cash |  |  | (1,844,000) |  |
Dividends on common stock |  |  | (197,680,000) |  |
Dividends on noncontrolling interest units |  |  | 0 |  |
Ending Balance | (817,616,000) |  | (817,616,000) |  |
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 |  |  | 15,000 |  |
Shares repurchased and retired |  |  | (4,782,000) |  |
Stock Issued During Period, Value, Stock Options Exercised |  |  | 218,000 |  |
Shares issued in exchange for units |  |  | 265,000 |  |
Shares issued in exchange for redeemable stock |  |  | 1,482,000 |  |
Redeemable stock fair market value |  |  | 0 |  |
Adjustment for noncontrolling interest ownership in operating partnership |  |  | 123,000 |  |
Amortization of unearned compensation |  |  | 5,739,000 |  |
Dividends on common stock |  |  | 0 |  |
Dividends on noncontrolling interest units |  |  | 0 |  |
Ending Balance | 7,114,079,000 |  | 7,114,079,000 |  |
Parent Company [Member] | Noncontrolling Interest [Member] |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Beginning Balance |  |  | 235,976,000 |  |
Net Income Attributable to Noncontrolling Interest |  |  | 3,351,000 |  |
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) |  |  | (16,000) |  |
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 |  |  | (265,000) |  |
Redeemable stock fair market value |  |  | 0 |  |
Adjustment for noncontrolling interest ownership in operating partnership |  |  | (123,000) |  |
Amortization of unearned compensation |  |  | 0 |  |
Dividends on common stock |  |  | 0 |  |
Dividends on noncontrolling interest units |  |  | (7,328,000) |  |
Ending Balance | 231,595,000 |  | 231,595,000 |  |
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) |  |  | (409,000) |  |
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 | 735,000 |  | 735,000 |  |
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 |  |  |  | 93,438,000 |
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) |  |  |  | (2,702,000) |
Issuance and registration of common shares |  |  |  | 186,000 |
Shares repurchased and retired |  |  |  | (1,742,000) |
Shares issued in exchange for units |  |  |  | 0 |
Shares issued in exchange for redeemable stock |  |  |  | 123,000 |
Redeemable stock fair market value |  |  |  | (1,518,000) |
Adjustment for noncontrolling interest ownership in operating partnership |  |  |  | 0 |
Amortization of unearned compensation |  |  |  | 4,383,000 |
Dividends on common stock |  |  |  | (123,852,000) |
Dividends on noncontrolling interest units |  |  |  | (6,820,000) |
Ending Balance |  | $ 3,119,319,000 |  | $ 3,119,319,000 |
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 |  |  | 93,571,000 |  |
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) |  |  | (425,000) |  |
Issuance and registration of common shares |  |  | 16,000 |  |
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 |  |  | (719,000) |  |
Adjustment for noncontrolling interest ownership in operating partnership |  |  | 0 |  |
Amortization of unearned compensation |  |  | 5,625,000 |  |
Dividends on common stock |  |  | (197,680,000) |  |
Dividends on noncontrolling interest units |  |  | (7,328,000) |  |
Ending Balance | $ 6,532,242,000 |  | $ 6,532,242,000 |  |

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