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Segment Information (Revenues and NOI for Reportable Segment) (Details) - Parent Company [Member] - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Revenues                      
Real Estate Revenue, Net                 $ 1,042,779,000 $ 992,178,000 $ 634,843,000
Management fee income                 0 154,000 647,000
Total operating revenues $ 263,337,000 $ 261,998,000 $ 258,891,000 $ 258,552,000 $ 253,219,000 $ 249,574,000 $ 245,305,000 $ 244,234,000 1,042,779,000 992,332,000 635,490,000
Net operating income                 642,134,000 598,814,000 389,012,000
Discontinued operations NOI included above                 0 16,000 (7,802,000)
Depreciation and amortization                 (294,520,000) (301,812,000) (186,979,000)
Acquisition expense                 (2,777,000) (2,388,000) (1,393,000)
Property management expense                 (30,990,000) (32,095,000) (23,083,000)
General and administrative expense                 (25,716,000) (20,909,000) (15,569,000)
Merger related expenses                 0 (3,152,000) (32,403,000)
Integration costs                 0 (8,395,000) (5,102,000)
Interest and other non-property income                 (368,000) 770,000 466,000
Interest expense 30,834,000 30,229,000 30,433,000 30,848,000 31,378,000 29,251,000 31,337,000 31,987,000 (122,344,000) (123,953,000) (78,978,000)
Gains (Losses) on Extinguishment of Debt                 (3,602,000) (2,586,000) (426,000)
Net casualty (loss) gain after insurance and other settlement proceeds                 473,000 (476,000) (143,000)
Gain on sale of depreciable real estate assets excluded from discontinued operations                 189,958,000 42,649,000 0
Income tax expense                 (1,673,000) (2,050,000) (893,000)
Gain on sale of non-depreciable real estate assets                 172,000 350,000 0
Gain (loss) from real estate joint ventures 3,000 (1,000) (23,000) 19,000 (10,000) 3,124,000 2,919,000 (24,000) (2,000) 6,009,000 338,000
Discontinued operations                 0 5,331,000 81,587,000
Net income attributable to noncontrolling interests (2,380,000) (5,094,000) (7,574,000) (3,410,000) (1,933,000) (3,743,000) (1,773,000) (848,000) (18,458,000) (8,297,000) (3,998,000)
Net income attributable to MAA $ 42,987,000 $ 91,734,000 $ 136,299,000 $ 61,267,000 $ 34,525,000 $ 66,976,000 $ 31,613,000 $ 14,866,000 332,287,000 147,980,000 115,281,000
Large Market Same Store                      
Revenues                      
Real Estate Revenue, Net                 587,896,000 553,038,000 241,194,000 [1]
Net operating income                 361,285,000 334,255,000 142,988,000 [1]
Secondary Market Same Store                      
Revenues                      
Real Estate Revenue, Net                 324,771,000 310,281,000 242,464,000 [1]
Net operating income                 200,989,000 190,348,000 147,607,000 [1]
Non Same Store And Other                      
Revenues                      
Real Estate Revenue, Net                 130,112,000 128,859,000 151,185,000 [1]
Net operating income                 $ 79,860,000 $ 74,211,000 $ 98,417,000 [1]
[1] The 2013 column shows the segment break down based on the 2014 same store portfolios. A comparison using the 2015 same store portfolio would not be comparative due to the nature of the classifications.