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Earnings Per OP Unit of MAALP - Schedule of Diluted Earnings per Common Unit (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Earnings Per Share Disclosure [Line Items] |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | $ 48,864 | $ 37,952
Dividends, Preferred Stock, Cash | (922) | (922)
Income from continuing operations available for common shareholders, adjusted | $ 46,217 | $ 35,676
Earnings per share - basic | $ 0.40 | $ 0.31
Net income available for MAA common shareholders, adjusted | $ 46,271 | $ 35,726
Effect of dilutive securities | 312,000 | 383,000
Weighted average common shares - diluted | 114,575,000 | 114,494,000
Earnings per common share - diluted | $ 0.40 | $ 0.31
Limited Partner [Member] |  |
Earnings Per Share Disclosure [Line Items] |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | $ 48,864 | $ 37,952
Income from continuing operations allocated to unvested restricted shares | (54) | (50)
Dividends, Preferred Stock, Cash | (922) | (922)
Income from continuing operations available for common shareholders, adjusted | $ 47,888 | $ 36,980
Weighted average common units - basic | 118,318 | 118,176
Earnings per share - basic | $ 0.40 | $ 0.31
Net income available for MAA common shareholders, adjusted | $ 47,942 | $ 37,030
Effect of dilutive securities | 312 | 383
Weighted average common shares - diluted | 118,630 | 118,559
Earnings per common share - diluted | $ 0.40 | $ 0.31

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