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MAA Equity (Tables) | 6 Months Ended
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Jun. 30, 2016 | Jun. 30, 2015
MAA Equity [Abstract] |  |
Shareholders' Equity [Table Text Block] | Total equity and its components for the six-month periods ended June 30, 2016 and 2015 were as follows (dollars in thousands, except per share and per unit data):
| Mid-America Apartment Communities, Inc. Shareholders' Equity |  |  |  |
| Common Stock Amount |  | Additional Paid-In Capital |  | Accumulated Distributions in Excess of Net Income |  | Accumulated Other Comprehensive Income (Loss) |  | Noncontrolling Interest |  | Total Equity
EQUITY BALANCE DECEMBER 31, 2015 | $ | 753 |  |  | $ | 3,627,074 |  |  | $ | (634,141 | ) |  | $ | (1,589 | ) |  | $ | 165,726 |  |  | $ | 3,157,823 |
Net income | — |  |  | — |  |  | 88,557 |  |  | — |  |  | 4,881 |  |  | 93,438 |
Other comprehensive loss - derivative instruments (cash flow hedges) | — |  |  | — |  |  | — |  |  | (2,561 | ) |  | (141 | ) |  | (2,702 | )
Issuance and registration of common shares | 1 |  |  | 185 |  |  | — |  |  | — |  |  | — |  |  | 186 |
Shares repurchased and retired | — |  |  | (1,742 | ) |  | — |  |  | — |  |  | — |  |  | (1,742 | )
Shares issued in exchange for OP Units | — |  |  | 158 |  |  | — |  |  | — |  |  | (158 | ) |  | — |
Shares issued in exchange from redeemable stock | — |  |  | 123 |  |  | — |  |  | — |  |  | — |  |  | 123 |
Redeemable stock fair market value adjustment | — |  |  | — |  |  | (1,518 | ) |  | — |  |  | — |  |  | (1,518 | )
Adjustment for noncontrolling interest ownership in operating partnership | — |  |  | (87 | ) |  | — |  |  | — |  |  | 87 |  |  | — |
Amortization of unearned compensation | — |  |  | 4,383 |  |  | — |  |  | — |  |  | — |  |  | 4,383 |
Dividends on common stock ($1.64 per share) | — |  |  | — |  |  | (123,852 | ) |  | — |  |  | — |  |  | (123,852 | )
Dividends on noncontrolling interest OP Units ($1.64 per OP Unit) | — |  |  | — |  |  | — |  |  | — |  |  | (6,820 | ) |  | (6,820 | )
EQUITY BALANCE JUNE 30, 2016 | $ | 754 |  |  | $ | 3,630,094 |  |  | $ | (670,954 | ) |  | $ | (4,150 | ) |  | $ | 163,575 |  |  | $ | 3,119,319 |
| Mid-America Apartment Communities, Inc. Shareholders' Equity |  |  |  |
| Common Stock Amount |  | Additional Paid-In Capital |  | Accumulated Distributions in Excess of Net Income |  | Accumulated Other Comprehensive Income (Loss) |  | Noncontrolling Interest |  | Total Equity
EQUITY BALANCE DECEMBER 31, 2014 | $ | 752 |  |  | $ | 3,619,270 |  |  | $ | (729,086 | ) |  | $ | (412 | ) |  | $ | 161,287 |  |  | $ | 3,051,811 |
Net income | — |  |  | — |  |  | 197,566 |  |  | — |  |  | 10,984 |  |  | 208,550 |
Other comprehensive income - derivative instruments (cash flow hedges) | — |  |  | — |  |  | — |  |  | 1,364 |  |  | 76 |  |  | 1,440 |
Issuance and registration of common shares | 2 |  |  | 182 |  |  | — |  |  | — |  |  | — |  |  | 184 |
Shares repurchased and retired | — |  |  | (945 | ) |  | — |  |  | — |  |  | — |  |  | (945 | )
Exercise of stock options | — |  |  | 420 |  |  |  |  |  | — |  |  | — |  |  | 420 |
Shares issued in exchange for OP Units | — |  |  | 184 |  |  | — |  |  | — |  |  | (184 | ) |  | — |
Redeemable stock fair market value adjustment | — |  |  | — |  |  | 173 |  |  | — |  |  | — |  |  | 173 |
Adjustment for noncontrolling interest ownership in operating partnership | — |  |  | 45 |  |  | — |  |  | — |  |  | (45 | ) |  | — |
Amortization of unearned compensation | — |  |  | 3,167 |  |  | — |  |  | — |  |  | — |  |  | 3,167 |
Dividends on common stock ($1.54 per share) | — |  |  | — |  |  | (116,066 | ) |  | — |  |  | — |  |  | (116,066 | )
Dividends on noncontrolling interest OP Units ($1.54 per OP Unit) | — |  |  | — |  |  | — |  |  | — |  |  | (6,449 | ) |  | (6,449 | )
EQUITY BALANCE JUNE 30, 2015 | $ | 754 |  |  | $ | 3,622,323 |  |  | $ | (647,413 | ) |  | $ | 952 |  |  | $ | 165,669 |  |  | $ | 3,142,285 |

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- Definition MAA Equity [Abstract] + References No definition available. + Details
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- Definition Shareholders' Equity [Table Text Block] + References No definition available. + Details
Name: | maa_ShareholdersEquityTableTextBlock
Namespace Prefix: | maa_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration