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Shareholders' Equity of MAA - Additional Information (Detail) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Statement [Line Items]      
Common stock, shares outstanding 75,542,583 75,379,381  
Total common shares and operating partnership units outstanding 79,685,786 79,564,446  
Treasury Stock, Shares, Acquired 19,727 11,914  
Noncontrolling Interest [Member]      
Statement [Line Items]      
Common Shares Issuable Upon Conversion Of Convertible Stock 4,143,203 4,185,065  
Parent Company [Member]      
Statement [Line Items]      
Common stock, shares outstanding 75,542,583   75,408,571
Proceeds from Stock Options Exercised $ 0 $ 420  
Employee Stock Option [Member]      
Statement [Line Items]      
Common stock shares, outstanding option 39,084 58,112  
Equity Option [Member]      
Statement [Line Items]      
Stock Issued During Period, Shares, New Issues 0 7,342