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MAALP Capital (Tables) | 6 Months Ended
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Jun. 30, 2024
M A A L P Capital [Abstract] |
Summary of Changes in Total Capital and its Components | Changes in MAALP’s total capital and its components for the three months ended June 30, 2024 and 2023 were as follows (dollars in thousands):
|  | Mid-America Apartments, L.P. Unitholders’ Capital |  |  |  |  |  |  |
|  | General Partner |  |  | Limited Partners |  |  | Preferred Units |  |  | Accumulated Other Comprehensive Loss |  |  | Noncontrolling Interests - Consolidated Real Estate Entities |  |  | Total Partnership Capital |
CAPITAL BALANCE MARCH 31, 2024 |  | $ | 6,014,015 |  |  | $ | 161,909 |  |  | $ | 66,840 |  |  | $ | (8,425 | ) |  | $ | 23,032 |  |  | $ | 6,257,371 |
Net income |  |  | 101,031 |  |  |  | 2,709 |  |  |  | 922 |  |  |  | — |  |  |  | — |  |  |  | 104,662 |
Other comprehensive income - derivative instruments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 503 |  |  |  | — |  |  |  | 503 |
Issuance of units |  |  | (890 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (890 | )
Units repurchased and retired |  |  | (4,132 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (4,132 | )
General partner units issued in exchange for limited partner units |  |  | 2,009 |  |  |  | (2,009 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Units issued in exchange for redeemable stock |  |  | 2,069 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,069 |
Redeemable units fair market value adjustment |  |  | (1,445 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (1,445 | )
Adjustment for limited partners’ capital at redemption value |  |  | 191 |  |  |  | (191 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Amortization of unearned compensation |  |  | 3,805 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3,805 |
Distributions to preferred unitholders |  |  | — |  |  |  | — |  |  |  | (922 | ) |  |  | — |  |  |  | — |  |  |  | (922 | )
Distributions to common unitholders ($1.4700 per unit) |  |  | (171,925 | ) |  |  | (4,513 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (176,438 | )
Contribution from noncontrolling interest |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,630 |  |  |  | 1,630 |
CAPITAL BALANCE JUNE 30, 2024 |  | $ | 5,944,728 |  |  | $ | 157,905 |  |  | $ | 66,840 |  |  | $ | (7,922 | ) |  | $ | 24,662 |  |  | $ | 6,186,213 |
|  | Mid-America Apartments, L.P. Unitholders’ Capital |  |  |  |  |  |  |
|  | General Partner |  |  | Limited Partners |  |  | Preferred Units |  |  | Accumulated Other Comprehensive Loss |  |  | Noncontrolling Interests - Consolidated Real Estate Entities |  |  | Total Partnership Capital |
CAPITAL BALANCE MARCH 31, 2023 |  | $ | 6,126,498 |  |  | $ | 166,309 |  |  | $ | 66,840 |  |  | $ | (9,990 | ) |  | $ | 21,320 |  |  | $ | 6,370,977 |
Net income |  |  | 144,766 |  |  |  | 3,969 |  |  |  | 922 |  |  |  | — |  |  |  | — |  |  |  | 149,657 |
Other comprehensive income - derivative instruments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 278 |  |  |  | — |  |  |  | 278 |
Issuance of units |  |  | (841 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (841 | )
Units repurchased and retired |  |  | (5,920 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (5,920 | )
General partner units issued in exchange for limited partner units |  |  | 52 |  |  |  | (52 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Redeemable units fair market value adjustment |  |  | (129 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (129 | )
Adjustment for limited partners’ capital at redemption value |  |  | 182 |  |  |  | (182 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Amortization of unearned compensation |  |  | 3,792 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3,792 |
Distributions to preferred unitholders |  |  | — |  |  |  | — |  |  |  | (922 | ) |  |  | — |  |  |  | — |  |  |  | (922 | )
Distributions to common unitholders ($1.4000 per unit) |  |  | (163,430 | ) |  |  | (4,418 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (167,848 | )
Contribution from noncontrolling interest |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,009 |  |  |  | 1,009 |
CAPITAL BALANCE JUNE 30, 2023 |  | $ | 6,104,970 |  |  | $ | 165,626 |  |  | $ | 66,840 |  |  | $ | (9,712 | ) |  | $ | 22,329 |  |  | $ | 6,350,053 |
Changes in MAALP’s total capital and its components for the six months ended June 30, 2024 and 2023 were as follows (dollars in thousands):
|  | Mid-America Apartments, L.P. Unitholders’ Capital |  |  |  |  |  |  |
|  | General Partner |  |  | Limited Partners |  |  | Preferred Units |  |  | Accumulated Other Comprehensive Loss |  |  | Noncontrolling Interests - Consolidated Real Estate Entities |  |  | Total Partnership Capital |
CAPITAL BALANCE DECEMBER 31, 2023 |  | $ | 6,036,154 |  |  | $ | 163,128 |  |  | $ | 66,840 |  |  | $ | (8,942 | ) |  | $ | 22,756 |  |  | $ | 6,279,936 |
Net income |  |  | 243,858 |  |  |  | 6,570 |  |  |  | 1,844 |  |  |  | — |  |  |  | — |  |  |  | 252,272 |
Other comprehensive income - derivative instruments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,020 |  |  |  | — |  |  |  | 1,020 |
Issuance of units |  |  | (797 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (797 | )
Units repurchased and retired |  |  | (4,974 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (4,974 | )
General partner units issued in exchange for limited partner units |  |  | 2,603 |  |  |  | (2,603 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Units issued in exchange for redeemable stock |  |  | 2,069 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,069 |
Redeemable units fair market value adjustment |  |  | (1,043 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (1,043 | )
Adjustment for limited partners’ capital at redemption value |  |  | 73 |  |  |  | (73 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Amortization of unearned compensation |  |  | 10,330 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 10,330 |
Distributions to preferred unitholders |  |  | — |  |  |  | — |  |  |  | (1,844 | ) |  |  | — |  |  |  | — |  |  |  | (1,844 | )
Distributions to common unitholders ($2.9400 per unit) |  |  | (343,545 | ) |  |  | (9,117 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (352,662 | )
Contribution from noncontrolling interest |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,906 |  |  |  | 1,906 |
CAPITAL BALANCE JUNE 30, 2024 |  | $ | 5,944,728 |  |  | $ | 157,905 |  |  | $ | 66,840 |  |  | $ | (7,922 | ) |  | $ | 24,662 |  |  | $ | 6,186,213 |
|  | Mid-America Apartments, L.P. Unitholders’ Capital |  |  |  |  |  |  |
|  | General Partner |  |  | Limited Partners |  |  | Preferred Units |  |  | Accumulated Other Comprehensive Loss |  |  | Noncontrolling Interests - Consolidated Real Estate Entities |  |  | Total Partnership Capital |
CAPITAL BALANCE DECEMBER 31, 2022 |  | $ | 5,948,498 |  |  | $ | 163,595 |  |  | $ | 66,840 |  |  | $ | (10,268 | ) |  | $ | 21,064 |  |  | $ | 6,189,729 |
Net income |  |  | 279,754 |  |  |  | 7,633 |  |  |  | 1,844 |  |  |  | — |  |  |  | — |  |  |  | 289,231 |
Other comprehensive income - derivative instruments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 556 |  |  |  | — |  |  |  | 556 |
Issuance of units |  |  | 203,056 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 203,056 |
Units repurchased and retired |  |  | (7,840 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (7,840 | )
General partner units issued in exchange for limited partner units |  |  | 531 |  |  |  | (531 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Units issued in exchange for redeemable stock |  |  | 581 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 581 |
Redeemable units fair market value adjustment |  |  | 664 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 664 |
Adjustment for limited partners’ capital at redemption value |  |  | (3,763 | ) |  |  | 3,763 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Amortization of unearned compensation |  |  | 10,171 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 10,171 |
Distributions to preferred unitholders |  |  | — |  |  |  | — |  |  |  | (1,844 | ) |  |  | — |  |  |  | — |  |  |  | (1,844 | )
Distributions to common unitholders ($2.8000 per unit) |  |  | (326,682 | ) |  |  | (8,834 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (335,516 | )
Contribution from noncontrolling interest |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,265 |  |  |  | 1,265 |
CAPITAL BALANCE JUNE 30, 2023 |  | $ | 6,104,970 |  |  | $ | 165,626 |  |  | $ | 66,840 |  |  | $ | (9,712 | ) |  | $ | 22,329 |  |  | $ | 6,350,053 |

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- Definition MAALP Capital [Abstract] + References No definition available. + Details
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Namespace Prefix: | maa_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Partners' Capital [Table Text Block] + References No definition available. + Details
Name: | maa_PartnersCapitalTableTextBlock
Namespace Prefix: | maa_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration