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MAALP Capital (Tables) | 9 Months Ended
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Sep. 30, 2021
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 September 30, 2021 and 2020 were as follows (dollars in thousands):
|  | Mid-America Apartments, L.P. Unitholders’ Capital |  |  |  |  |  |  |
|  | Limited Partners |  |  | General Partner |  |  | Preferred Units |  |  | Accumulated Other Comprehensive Loss |  |  | Noncontrolling Interests - Consolidated Real Estate Entities |  |  | Total Partnership Capital |
CAPITAL BALANCE JUNE 30, 2021 |  | $ | 185,340 |  |  | $ | 5,863,795 |  |  | $ | 66,840 |  |  | $ | (11,939 | ) |  | $ | 16,612 |  |  | $ | 6,120,648 |
Net income |  |  | 2,568 |  |  |  | 83,557 |  |  |  | 922 |  |  |  | — |  |  |  | — |  |  |  | 87,047 |
Other comprehensive income - derivative instruments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 278 |  |  |  | — |  |  |  | 278 |
Issuance of units |  |  | — |  |  |  | (103 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (103 | )
Exercise of unit options |  |  | — |  |  |  | 12 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 12 |
General partnership units issued in exchange for limited partnership units |  |  | (11,108 | ) |  |  | 11,108 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Redeemable units fair market value adjustment |  |  | — |  |  |  | (2,356 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (2,356 | )
Adjustment for limited partners’ capital at redemption value |  |  | 52 |  |  |  | (52 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Amortization of unearned compensation |  |  | — |  |  |  | 4,007 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 4,007 |
Distributions to preferred unitholders |  |  | — |  |  |  | — |  |  |  | (922 | ) |  |  | — |  |  |  | — |  |  |  | (922 | )
Distributions to common unitholders ($1.025 per unit) |  |  | (3,486 | ) |  |  | (118,018 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (121,504 | )
Contribution from noncontrolling interest |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3,204 |  |  |  | 3,204 |
CAPITAL BALANCE SEPTEMBER 30, 2021 |  | $ | 173,366 |  |  | $ | 5,841,950 |  |  | $ | 66,840 |  |  | $ | (11,661 | ) |  | $ | 19,816 |  |  | $ | 6,090,311 |
|  | Mid-America Apartments, L.P. Unitholders’ Capital |  |  |  |  |  |  |
|  | Limited Partners |  |  | General Partner |  |  | Preferred Units |  |  | Accumulated Other Comprehensive Loss |  |  | Noncontrolling Interests - Consolidated Real Estate Entities |  |  | Total Partnership Capital |
CAPITAL BALANCE JUNE 30, 2020 |  | $ | 209,894 |  |  | $ | 5,901,028 |  |  | $ | 66,840 |  |  | $ | (13,053 | ) |  | $ | 6,849 |  |  | $ | 6,171,558 |
Net income |  |  | 2,126 |  |  |  | 58,988 |  |  |  | 922 |  |  |  | — |  |  |  | — |  |  |  | 62,036 |
Other comprehensive income - derivative instruments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 279 |  |  |  | — |  |  |  | 279 |
Issuance of units |  |  | — |  |  |  | 33 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 33 |
General partnership units issued in exchange for limited partnership units |  |  | (21 | ) |  |  | 21 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Redeemable units fair market value adjustment |  |  | — |  |  |  | (155 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (155 | )
Adjustment for limited partners’ capital at redemption value |  |  | (61 | ) |  |  | 61 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Amortization of unearned compensation |  |  | — |  |  |  | 4,380 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 4,380 |
Distributions to preferred unitholders |  |  | — |  |  |  | — |  |  |  | (922 | ) |  |  | — |  |  |  | — |  |  |  | (922 | )
Distributions to common unitholders ($1.000 per unit) |  |  | (3,866 | ) |  |  | (114,369 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (118,235 | )
Contribution from noncontrolling interest |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 262 |  |  |  | 262 |
CAPITAL BALANCE SEPTEMBER 30, 2020 |  | $ | 208,072 |  |  | $ | 5,849,987 |  |  | $ | 66,840 |  |  | $ | (12,774 | ) |  | $ | 7,111 |  |  | $ | 6,119,236 |
Changes in MAALP’s total capital and its components for the nine months ended September 30, 2021 and 2020 were as follows (dollars in thousands):
|  | Mid-America Apartments, L.P. Unitholders’ Capital |  |  |  |  |  |  |
|  | Limited Partners |  |  | General Partner |  |  | Preferred Units |  |  | Accumulated Other Comprehensive Loss |  |  | Noncontrolling Interests - Consolidated Real Estate Entities |  |  | Total Partnership Capital |
CAPITAL BALANCE DECEMBER 31, 2020 |  | $ | 206,927 |  |  | $ | 5,817,270 |  |  | $ | 66,840 |  |  | $ | (12,496 | ) |  | $ | 9,848 |  |  | $ | 6,088,389 |
Net income |  |  | 11,636 |  |  |  | 345,384 |  |  |  | 2,766 |  |  |  | — |  |  |  | — |  |  |  | 359,786 |
Other comprehensive income - derivative instruments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 835 |  |  |  | — |  |  |  | 835 |
Issuance of units |  |  | — |  |  |  | (436 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (436 | )
Units repurchased and retired |  |  | — |  |  |  | (9,043 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (9,043 | )
Exercise of unit options |  |  | — |  |  |  | 1,478 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,478 |
General partnership units issued in exchange for limited partnership units |  |  | (33,272 | ) |  |  | 33,272 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Redeemable units fair market value adjustment |  |  | — |  |  |  | (7,545 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (7,545 | )
Adjustment for limited partners’ capital at redemption value |  |  | (587 | ) |  |  | 587 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Amortization of unearned compensation |  |  | — |  |  |  | 14,151 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 14,151 |
Distributions to preferred unitholders |  |  | — |  |  |  | — |  |  |  | (2,766 | ) |  |  | — |  |  |  | — |  |  |  | (2,766 | )
Distributions to common unitholders ($3.075 per unit) |  |  | (11,338 | ) |  |  | (353,168 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (364,506 | )
Contribution from noncontrolling interest |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 9,968 |  |  |  | 9,968 |
CAPITAL BALANCE SEPTEMBER 30, 2021 |  | $ | 173,366 |  |  | $ | 5,841,950 |  |  | $ | 66,840 |  |  | $ | (11,661 | ) |  | $ | 19,816 |  |  | $ | 6,090,311 |
|  | Mid-America Apartments, L.P. Unitholders’ Capital |  |  |  |  |  |  |
|  | Limited Partners |  |  | General Partner |  |  | Preferred Units |  |  | Accumulated Other Comprehensive Loss |  |  | Noncontrolling Interests - Consolidated Real Estate Entities |  |  | Total Partnership Capital |
CAPITAL BALANCE DECEMBER 31, 2019 |  | $ | 214,647 |  |  | $ | 6,015,290 |  |  | $ | 66,840 |  |  | $ | (13,584 | ) |  | $ | 6,247 |  |  | $ | 6,289,440 |
Net income |  |  | 6,096 |  |  |  | 168,854 |  |  |  | 2,766 |  |  |  | — |  |  |  | — |  |  |  | 177,716 |
Other comprehensive income - derivative instruments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 810 |  |  |  | — |  |  |  | 810 |
Issuance of units |  |  | — |  |  |  | (344 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (344 | )
Units repurchased and retired |  |  | — |  |  |  | (5,657 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (5,657 | )
Exercise of unit options |  |  | — |  |  |  | 71 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 71 |
General partnership units issued in exchange for limited partnership units |  |  | (471 | ) |  |  | 471 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Redeemable units fair market value adjustment |  |  | — |  |  |  | 1,659 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,659 |
Adjustment for limited partners’ capital at redemption value |  |  | (216 | ) |  |  | 216 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Amortization of unearned compensation |  |  | — |  |  |  | 12,533 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 12,533 |
Distributions to preferred unitholders |  |  | — |  |  |  | — |  |  |  | (2,766 | ) |  |  | — |  |  |  | — |  |  |  | (2,766 | )
Distributions to common unitholders ($3.000 per unit) |  |  | (11,984 | ) |  |  | (343,106 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (355,090 | )
Contribution from noncontrolling interest |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 864 |  |  |  | 864 |
CAPITAL BALANCE SEPTEMBER 30, 2020 |  | $ | 208,072 |  |  | $ | 5,849,987 |  |  | $ | 66,840 |  |  | $ | (12,774 | ) |  | $ | 7,111 |  |  | $ | 6,119,236 |

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- Definition MAALP Capital [Abstract] + References No definition available. + Details
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- Definition Partners' Capital [Table Text Block] + References No definition available. + Details
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Namespace Prefix: | maa_
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