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MAALP Capital | 3 Months Ended
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Mar. 31, 2016
MAALP Capital [Abstract] |
Consolidated Statements of Changes in Capital [Text Block] | MAALP Capital Total capital and its components for the three-month periods ended March 31, 2016 and 2015 were as follows (dollars in thousands, except per unit data):
| Mid-America Apartments, L.P. Unitholders |  |
| Limited Partner |  | General Partner |  | Accumulated Other Comprehensive Income (Loss) |  | Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2015 | $ | 165,726 |  |  | $ | 2,993,696 |  |  | $ | (1,618 | ) |  | $ | 3,157,804 |
Net income | 2,395 |  |  | 43,413 |  |  | — |  |  | 45,808 |
Other comprehensive loss - derivative instruments (cash flow hedges) | — |  |  | — |  |  | (2,519 | ) |  | (2,519 | )
Issuance of units | — |  |  | 90 |  |  | — |  |  | 90 |
Units repurchased and retired | — |  |  | (1,730 | ) |  | — |  |  | (1,730 | )
General partner units issued in exchange for limited partner units | (33 | ) |  | 33 |  |  | — |  |  | — |
Units issued in exchange for redeemable units | — |  |  | 123 |  |  | — |  |  | 123 |
Redeemable units fair market value adjustment | — |  |  | (1,100 | ) |  | — |  |  | (1,100 | )
Adjustment for limited partners' capital at redemption value | (172 | ) |  | 172 |  |  | — |  |  | — |
Amortization of unearned compensation | — |  |  | 2,078 |  |  | — |  |  | 2,078 |
Distributions ($0.82 per unit) | (3,412 | ) |  | (61,928 | ) |  | — |  |  | (65,340 | )
CAPITAL BALANCE MARCH 31, 2016 | $ | 164,504 |  |  | $ | 2,974,847 |  |  | $ | (4,137 | ) |  | $ | 3,135,214 |
| Mid-America Apartments, L.P. Unitholders |  |
| Limited Partner |  | General Partner |  | Accumulated Other Comprehensive Income (Loss) |  | Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2014 | $ | 161,310 |  |  | $ | 2,890,858 |  |  | $ | (376 | ) |  | $ | 3,051,792 |
Net income | 3,410 |  |  | 61,267 |  |  | — |  |  | 64,677 |
Other comprehensive income - derivative instruments (cash flow hedges) | — |  |  | — |  |  | (2,155 | ) |  | (2,155 | )
Issuance of units | — |  |  | 8 |  |  | — |  |  | 8 |
Units repurchased and retired | — |  |  | (937 | ) |  | — |  |  | (937 | )
General partner units issued in exchange for limited partner units | (46 | ) |  | 46 |  |  | — |  |  | — |
Redeemable units fair market value adjustment | — |  |  | (209 | ) |  | — |  |  | (209 | )
Adjustment for limited partners' capital at redemption value | (128 | ) |  | 128 |  |  | — |  |  | — |
Amortization of unearned compensation | — |  |  | 1,462 |  |  | — |  |  | 1,462 |
Distributions ($0.77 per unit) | (3,226 | ) |  | (58,034 | ) |  | — |  |  | (61,260 | )
CAPITAL BALANCE MARCH 31, 2015 | $ | 161,320 |  |  | $ | 2,894,589 |  |  | $ | (2,531 | ) |  | $ | 3,053,378 |

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- Definition Consolidated Statements of Changes in Capital [Text Block] + References No definition available. + Details
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- Definition MAALP Capital [Abstract] + References No definition available. + Details
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Data Type: | xbrli:stringItemType
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Period Type: | duration