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Segment Information (Revenues and NOI for Reportable Segment) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Revenues |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Merger and Integration Related Expenses |  |  |  |  |  |  |  |  |  | $ (40,800,000) |  |
Preferred Stock Dividends, Income Statement Impact |  |  |  |  |  |  |  |  |  |  | $ 0 |
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |
Total operating revenues | $ 382,738,000 | $ 384,550,000 | $ 382,791,000 | $ 378,908,000 | $ 307,198,000 | $ 276,898,000 | $ 272,236,000 | $ 269,016,000 | $ 1,528,987,000 | 1,125,348,000 | 1,042,779,000 |
Net operating income |  |  |  |  |  |  |  |  | 952,256,000 | 701,992,000 | 642,134,000 |
Depreciation and amortization |  |  |  |  |  |  |  |  | (493,708,000) | (322,958,000) | (294,520,000) |
Property management expense |  |  |  |  |  |  |  |  | (43,588,000) | (34,093,000) | (30,990,000) |
General and administrative expense |  |  |  |  |  |  |  |  | (40,194,000) | (29,040,000) | (25,716,000) |
Business Combination, Merger and Integration Related Expenses |  |  |  |  |  |  |  |  | (19,990,000) | (40,823,000) | 0 |
Interest expense |  |  |  |  |  |  |  |  | (154,751,000) | (129,947,000) | (122,344,000) |
Gain on sale of depreciable real estate assets excluded from discontinued operations |  |  |  |  |  |  |  |  | 127,386,000 | 80,397,000 | 189,958,000 |
Income tax expense |  |  |  |  |  |  |  |  | (2,619,000) | (1,699,000) | (1,673,000) |
Gain on sale of non-depreciable real estate assets |  |  |  |  |  |  |  |  | 21,000 | 2,171,000 | 172,000 |
Other Nonoperating Income (Expense) |  |  |  |  |  |  |  |  | 14,353,000 | (1,839,000) | (6,274,000) |
Gain (loss) from real estate joint ventures |  |  |  |  |  |  |  |  | 1,370,000 | 241,000 | (2,000) |
Net income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | (12,157,000) | (12,180,000) | (18,458,000) |
Preferred Stock Dividends, Income Statement Impact |  |  |  |  |  |  |  |  | (3,688,000) | (307,000) |  |
Net income attributable to MAA | $ 122,528,000 | $ 113,787,000 | $ 47,393,000 | $ 40,983,000 | $ 39,079,000 | $ 84,279,000 | $ 45,144,000 | $ 43,413,000 | 324,691,000 | 211,915,000 | 332,287,000 |
Parent Company [Member] | Large Market Same Store |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Revenue, Net |  |  |  |  |  |  |  |  | 672,131,000 | 652,560,000 | 612,934,000 | [1]
Net operating income |  |  |  |  |  |  |  |  | 422,075,000 | 407,294,000 | 377,025,000 | [1]
Parent Company [Member] | Secondary Market Same Store |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Revenue, Net |  |  |  |  |  |  |  |  | 349,007,000 | 340,161,000 | 327,700,000 | [1]
Net operating income |  |  |  |  |  |  |  |  | 218,673,000 | 213,273,000 | 204,382,000 | [1]
Parent Company [Member] | Non Same Store And Other |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Revenue, Net |  |  |  |  |  |  |  |  | 507,849,000 | 132,627,000 | 102,145,000 | [1]
Net operating income |  |  |  |  |  |  |  |  | $ 311,508,000 | $ 81,425,000 | $ 60,727,000 | [1]
[1] | The 2015 column shows the segment break down based on the 2016 same store portfolios. A comparison using the 2017 same store portfolio would not be comparative due to the nature of the segment classifications.

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