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Earnings Per Common Share of MAA - Schedule of Computation of Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Earnings Per Share Disclosure [Line Items] |  |  |  |  |
Income from Continuing Operations, Including Portion Attributable to Noncontrolling Interest |  | $ 62,036 | $ 81,459 | $ 177,716 | $ 211,558
Income from continuing operations attributable to noncontrolling interests |  | (2,126) | (2,814) | (6,096) | (7,336)
Income from continuing operations allocated to unvested restricted shares |  | (78) | (118) | (229) | (302)
Dividends, Preferred Stock, Cash |  | (922) | (922) | (2,766) | (2,766)
Income from continuing operations available for common shareholders, adjusted |  | $ 58,910 | $ 77,605 | $ 168,625 | $ 201,154
Weighted average common shares - basic |  | 114,216 | 113,877 | 114,177 | 113,814
Earnings per share - basic |  | $ 0.52 | $ 0.68 | $ 1.48 | $ 1.77
Income from Continuing Operations, Including Portion Attributable to Noncontrolling Interest |  | $ 62,036 | $ 81,459 | $ 177,716 | $ 211,558
Income from continuing operations attributable to noncontrolling interests | [1] | (2,126) | (2,814) | (6,096) | (7,336)
Net income available for MAA common shareholders, adjusted |  | $ 58,988 | $ 77,723 | $ 168,854 | $ 201,456
Effect of dilutive securities |  | 252 | 260 | 310 | 238
Weighted average common shares - diluted |  | 114,468 | 114,137 | 114,487 | 114,052
Earnings per share - diluted |  | $ 0.52 | $ 0.68 | $ 1.47 | $ 1.77
Limited Partnership Units [Member] |  |  |  |  |
Earnings Per Share Disclosure [Line Items] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  | 4,100 | 4,100 | 4,100 | 4,100
[1] | For the three and nine months ended September 30, 2020 and 2019, 4.1 million OP Units and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

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