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Earnings Per Common Share of MAA (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Earnings Per Share Disclosure [Line Items] |  |  |  |  |
Dividends, Preferred Stock, Cash |  |  |  |  | $ 0
Parent Company [Member] |  |  |  |  |
Earnings Per Share Disclosure [Line Items] |  |  |  |  |
Weighted average common shares - basic |  | 113,403 | 75,277 | 113,371 | 75,263
Weighted average partnership units outstanding | [1] | 0 | 0 | 0 | 0
Effect of dilutive securities | [2] | 211 | 0 | 279 | 239
Weighted average common shares - diluted |  | 113,614 | 75,277 | 113,650 | 75,502
Dividends, Preferred Stock, Cash |  |  |  | $ 1,844 |
Calculation of Basic Earnings per Share [Member] | Parent Company [Member] |  |  |  |  |
Earnings Per Share Disclosure [Line Items] |  |  |  |  |
Income from continuing operations |  | $ 50,155 | $ 47,630 | 93,571 | $ 93,438
Income from continuing operations attributable to noncontrolling interests |  | (1,840) | (2,486) | (3,351) | (4,881)
Income from continuing operations allocated to unvested restricted shares |  | (76) | (134) | (149) | (237)
Dividends, Preferred Stock, Cash |  | (922) | 0 | (1,844) | 0
Income from continuing operations available for common shareholders, adjusted |  | $ 47,317 | $ 45,010 | $ 88,227 | $ 88,320
Earnings per share - basic |  | $ 0.42 | $ 0.60 | $ 0.78 | $ 1.17
Calculation of Diluted Earnings per Share [Member] | Parent Company [Member] |  |  |  |  |
Earnings Per Share Disclosure [Line Items] |  |  |  |  |
Income from continuing operations |  | $ 50,155 | $ 47,630 | $ 93,571 | $ 93,438
Income from continuing operations attributable to noncontrolling interests | [1] | (1,840) | (2,486) | (3,351) | (4,881)
Income from continuing operations allocated to unvested restricted shares | [2] | 0 | (134) | 0 | 0
Dividends, Preferred Stock, Cash |  | (922) |  | (1,844) | 0
Income from continuing operations available for common shareholders, adjusted |  | $ 47,393 | $ 45,010 | $ 88,376 | $ 88,557
Earnings per share - diluted |  | $ 0.42 | $ 0.60 | $ 0.78 | $ 1.17
Limited Partnership Units [Member] | Parent Company [Member] |  |  |  |  |
Earnings Per Share Disclosure [Line Items] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  |  |  | 4,200 |
[1] | (1) For both the three and six months ended June 30, 2017 and June 30, 2016, 4.2 million OP Units and their related income are not included in the diluted earnings per share calculations as they are not dilutive.
[2] | (2) For the three months ended June 30, 2016, 0.2 million potentially dilutive securities and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

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- Definition Adjusted Income (Loss) from Continuing Operations Available for Common Shareholders, Basic + References No definition available. + Details
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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