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Partners' Capital of MAA LP (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2017
Schedule of Capital Structure [Line Items] |  |
Operating partnership units outstanding | 117,738,615 | 117,834,752
General partners' capital account, units outstanding | 113,518,212 | 113,643,166
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest | 96.40% |
Limited partners' capital account, units outstanding |  | 4,191,586
Noncontrolling Interest |  |
Schedule of Capital Structure [Line Items] |  |
Common Shares Issuable Upon Conversion Of Convertible Stock | 4,220,403 | 4,191,586
Redeemable Capital Shares Par Or Stated Value Per Share | $ 97.92 | $ 100.56
Limited Partners' Capital Account | $ 413.3 | $ 421.5

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