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MAALP Capital | 6 Months Ended
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Jun. 30, 2017
MAALP Capital [Abstract] |
Consolidated Statements of Changes in Capital [Text Block] | MAALP Capital Changes in total capital and its components for the six-month periods ended June 30, 2017 and 2016 were as follows (dollars in thousands, except per unit data):
| Mid-America Apartments, L.P. Unitholders' Capital |  |  |  |
| Limited Partner |  | General Partner |  | Preferred Units |  | Accumulated Other Comprehensive Income (Loss) |  | Noncontrolling Interest - Consolidated Real Estate Entity |  | Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2016 | $ | 235,976 |  |  | $ | 6,337,721 |  |  | $ | 64,833 |  |  | $ | 1,246 |  |  | $ | 2,306 |  |  | $ | 6,642,082 |
Net income attributable to controlling interest | 3,351 |  |  | 88,376 |  |  | 1,844 |  |  | — |  |  | — |  |  | 93,571 |
Other comprehensive income - derivative instruments (cash flow hedges) | — |  |  | — |  |  | — |  |  | (425 | ) |  | — |  |  | (425 | )
Issuance of units | — |  |  | 16 |  |  | 2,007 |  |  | — |  |  | — |  |  | 2,023 |
Units repurchased and retired | — |  |  | (4,782 | ) |  | — |  |  | — |  |  | — |  |  | (4,782 | )
Exercise of unit options | — |  |  | 218 |  |  | — |  |  | — |  |  | — |  |  | 218 |
General partner units issued in exchange for limited partner units | (265 | ) |  | 265 |  |  | — |  |  | — |  |  | — |  |  | — |
Units issued in exchange for redeemable units | — |  |  | 1,482 |  |  | — |  |  | — |  |  | — |  |  | 1,482 |
Redeemable units fair market value adjustment | — |  |  | (719 | ) |  | — |  |  | — |  |  | — |  |  | (719 | )
Adjustment for limited partners' capital at redemption value | (139 | ) |  | 139 |  |  | — |  |  | — |  |  | — |  |  | — |
Amortization of unearned compensation | — |  |  | 5,625 |  |  | — |  |  | — |  |  | — |  |  | 5,625 |
Distributions to preferred unitholders | — |  |  | — |  |  | (1,844 | ) |  | — |  |  | — |  |  | (1,844 | )
Distributions ($1.74 per unit) | (7,328 | ) |  | (197,680 | ) |  | — |  |  | — |  |  | — |  |  | (205,008 | )
CAPITAL BALANCE JUNE 30, 2017 | $ | 231,595 |  |  | $ | 6,230,661 |  |  | $ | 66,840 |  |  | $ | 821 |  |  | $ | 2,306 |  |  | $ | 6,532,223 |
| Mid-America Apartments, L.P. Unitholders' Capital |  |  |  |
| Limited Partner |  | General Partner |  | Preferred Units |  | Accumulated Other Comprehensive Income (Loss) |  | Noncontrolling Interest - Consolidated Real Estate Entity |  | Total Partnership Capital
CAPITAL BALANCE DECEMBER 31, 2015 | $ | 165,726 |  |  | $ | 2,993,696 |  |  | $ | — |  |  | $ | (1,618 | ) |  | $ | — |  |  | $ | 3,157,804 |
Net income attributable to controlling interest | 4,881 |  |  | 88,557 |  |  | — |  |  | — |  |  | — |  |  | 93,438 |
Other comprehensive loss - derivative instruments (cash flow hedges) | — |  |  | — |  |  | — |  |  | (2,702 | ) |  | — |  |  | (2,702 | )
Issuance of units | — |  |  | 186 |  |  | — |  |  | — |  |  | — |  |  | 186 |
Units repurchased and retired | — |  |  | (1,742 | ) |  | — |  |  | — |  |  | — |  |  | (1,742 | )
General partner units issued in exchange for limited partner units | (158 | ) |  | 158 |  |  | — |  |  | — |  |  | — |  |  | — |
Units issued in exchange for redeemable units | — |  |  | 123 |  |  | — |  |  | — |  |  | — |  |  | 123 |
Redeemable units fair market value adjustment | — |  |  | (1,518 | ) |  | — |  |  | — |  |  | — |  |  | (1,518 | )
Adjustment for limited partners' capital at redemption value | (54 | ) |  | 54 |  |  | — |  |  | — |  |  | — |  |  | — |
Amortization of unearned compensation | — |  |  | 4,383 |  |  | — |  |  | — |  |  | — |  |  | 4,383 |
Distributions ($1.64 per unit) | (6,820 | ) |  | (123,852 | ) |  | — |  |  | — |  |  | — |  |  | (130,672 | )
CAPITAL BALANCE JUNE 30, 2016 | $ | 163,575 |  |  | $ | 2,960,045 |  |  | $ | — |  |  | $ | (4,320 | ) |  | $ | — |  |  | $ | 3,119,300 |

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- Definition MAALP Capital [Abstract] + References No definition available. + Details
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