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MAA Equity (Details) - USD ($)
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Equity [Line Items]      
Stock Issued During Period, Shares, New Issues 0    
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Dividends, Preferred Stock, Cash   $ 0  
Accumulated Distributions in Excess of Net Income [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance $ (707,479,000) (634,141,000)  
Net income attributable to MAA 41,905,000 43,413,000  
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) 0    
Issuance and registration of common shares 0    
Shares repurchased and retired 0    
Shares issued in exchange for units 0    
Redeemable stock fair market value (298,000) (1,100,000)  
Adjustment for noncontrolling interest ownership in operating partnership 0    
Amortization of unearned compensation (114,000)    
Dividends on common stock (98,841,000) (61,928,000)  
Dividends on noncontrolling interest units 0    
Ending Balance (765,749,000) (653,756,000)  
Preferred Stock [Member]      
Equity [Line Items]      
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 9,000   $ 9,000
Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance 1,133,000 753,000  
Issuance and registration of common shares 1,000 1,000  
Shares repurchased and retired 0 0  
Shares issued in exchange for units 0 0  
Ending Balance 1,134,000 754,000  
Additional Paid-in Capital [Member]      
Equity [Line Items]      
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 0    
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance 7,109,012,000 3,627,074,000  
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) 0    
Issuance and registration of common shares 67,000 89,000  
Shares repurchased and retired (4,734,000) (1,730,000)  
Shares issued in exchange for units 167,000 33,000  
Shares issued in exchange for redeemable stock 1,482,000 123,000  
Redeemable stock fair market value 0    
Adjustment for noncontrolling interest ownership in operating partnership 305,000 40,000  
Amortization of unearned compensation 3,139,000 2,078,000  
Dividends on common stock 0    
Dividends on noncontrolling interest units 0    
Ending Balance 7,111,445,000 3,627,707,000  
Noncontrolling Interest [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance 235,976,000 165,726,000  
Net Income Attributable to Noncontrolling Interest 1,511,000 2,395,000  
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) 113,000 (132,000)  
Issuance and registration of common shares 0    
Shares repurchased and retired 0    
Shares issued in exchange for units (167,000) (33,000)  
Redeemable stock fair market value 0    
Adjustment for noncontrolling interest ownership in operating partnership (305,000) (40,000)  
Amortization of unearned compensation 0    
Dividends on common stock 0 0  
Dividends on noncontrolling interest units (3,664,000) (3,412,000)  
Ending Balance 233,464,000 164,504,000  
Accumulated Other Comprehensive Income (Loss) [Member]      
Equity [Line Items]      
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 0    
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance 1,144,000 (1,589,000)  
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) 3,079,000 (2,387,000)  
Issuance and registration of common shares 0    
Shares repurchased and retired 0    
Shares issued in exchange for units 0    
Redeemable stock fair market value 0    
Adjustment for noncontrolling interest ownership in operating partnership 0    
Amortization of unearned compensation 0    
Dividends on common stock 0    
Dividends on noncontrolling interest units 0    
Ending Balance 4,223,000 (3,976,000)  
Parent Company [Member]      
Equity [Line Items]      
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 43,416,000 45,808,000  
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 6,584,526,000   6,639,795,000
Noncontrolling Interest in Joint Ventures 2,306,000   $ 2,306,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Dividends, Preferred Stock, Cash (922,000)    
Parent Company [Member] | Accumulated Distributions in Excess of Net Income [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Dividends, Preferred Stock, Cash (922,000)    
Parent Company [Member] | Additional Paid-in Capital [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Issuance and registration of common shares 2,007,000    
Parent Company [Member] | Noncontrolling Interest [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Issuance and registration of common shares   0  
Stockholders' Equity, Total [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance 6,642,101,000 3,157,823,000  
Net Income Including Portion Attributable to Noncontrolling Interest 43,416,000 45,808,000  
Other comprehensive (loss) income - derivatives insturments (cash flow hedges) 3,192,000 (2,519,000)  
Issuance and registration of common shares 68,000 90,000  
Shares repurchased and retired (4,734,000) (1,730,000)  
Shares issued in exchange for units 0 0  
Shares issued in exchange for redeemable stock 1,482,000 123,000  
Redeemable stock fair market value (298,000) (1,100,000)  
Adjustment for noncontrolling interest ownership in operating partnership 0 0  
Amortization of unearned compensation 3,025,000 2,078,000  
Dividends on common stock (98,841,000) (61,928,000)  
Dividends on noncontrolling interest units (3,664,000) (3,412,000)  
Ending Balance $ 6,586,832,000 $ 3,135,233,000