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Consolidated Statements of Equity - USD ($)
shares in Thousands
Total
Limited Partners' Capital Account [Member]
General Partners' Capital Account [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Common Stock
Additional Paid-in Capital
Accumulated Distributions in Excess of Net Income
Accumulated Other Comprehensive Income (Loss) [Member]
Noncontrolling Interest
Stockholders' Equity, Total [Member]
Parent Company [Member]
Parent Company [Member]
Common Stock
Parent Company [Member]
Additional Paid-in Capital
Parent Company [Member]
Accumulated Distributions in Excess of Net Income
Parent Company [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Parent Company [Member]
Noncontrolling Interest
Parent Company [Member]
Stockholders' Equity, Total [Member]
Parent Company [Member]
Redeemable Stock
Limited Partner [Member]
Limited Partner [Member]
Limited Partners' Capital Account [Member]
Limited Partner [Member]
General Partners' Capital Account [Member]
Limited Partner [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Limited Partner [Member]
Total Partnership Capital [Member]
Limited Partner [Member]
Redeemable Stock
Shares, Outstanding at Dec. 31, 2012                       42,243                        
Common stock shares issued (shares)                       32,325                        
Common stock repurchased and retired (shares)                       10                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period                       111                        
Stock Issued During Period, Shares, Conversion of Units                       79                        
Shares, Outstanding at Dec. 31, 2013                       74,748                        
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2012                       $ 422,000 $ 1,542,999,000 $ (603,315,000) $ (26,054,000) $ 31,058,000 $ 945,110,000              
Net Income Attributable to Parent                           115,281,000                    
Net Income Attributable to Noncontrolling Interest                               3,998,000                
Net income                     $ 119,279,000           119,279,000   $ 107,544,000       $ 107,544,000  
Other comprehensive income - derivative instruments (cash flow hedges)                             26,162,000 892,000 27,054,000         $ 27,055,000 27,055,000  
Issuance and registration of common shares                       325,000 2,026,913,000     161,069,000 2,188,307,000 $ 692,000            
Shares repurchased and retired                       0 (702,000)       (702,000)              
Exercise of stock options                       0 6,212,000       6,212,000              
Shares issued in exchange for units                       0 2,519,000     (2,519,000) 0              
Notes To Financial Statements [Abstract]                                                
Redeemable stock fair market value                           355,000     355,000 (355,000)     $ (355,000)   (355,000) $ (355,000)
Correction of classification of equity accounts (Note 1)                         0 0   0 0              
Adjustment for Noncontrolling Interest Ownership in operating partnership                         19,340,000     (19,340,000) 0     $ (25,505,000) 43,324,000   17,819,000  
Amortization of unearned compensation                         2,268,000       2,268,000       2,268,000   2,268,000  
Dividends on common stock                           (165,914,000)     (165,914,000)              
Dividends on noncontrolling interest units                               (8,432,000) (8,432,000)              
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2013                       $ 747,000 3,599,549,000 (653,593,000) 108,000 $ 166,726,000 3,113,537,000              
Redeemable stock at Dec. 31, 2012                                   4,713,000           4,713,000
Redeemable stock at Dec. 31, 2013                                   5,050,000           5,050,000
Partners' Capital at Dec. 31, 2012                                       38,154,000 927,734,000 (26,881,000) 939,007,000  
Notes To Financial Statements [Abstract]                                                
Net Income (Loss) Allocated to Limited Partners                                       3,979,000        
Net Income (Loss) Allocated to General Partners                                         103,565,000      
Issuance of units                                       161,069,000 2,027,237,000   2,188,306,000 692,000
Units repurchased and retired                                         (702,000)   (702,000)  
Exercise of unit options                                         6,212,000   6,212,000  
General partnership units issued in exchange for limited partnership units                                       (2,519,000) (2,519,000)   0  
Distributions                                       (8,432,000) (165,914,000)   (174,346,000)  
Partners' Capital at Dec. 31, 2013                                       166,746,000 2,946,598,000 174,000 3,113,518,000  
Common stock shares issued (shares)                       138                        
Common stock repurchased and retired (shares)                       12                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period                       270                        
Stock Issued During Period, Shares, Conversion of Units                       36                        
Shares, Outstanding at Dec. 31, 2014                       75,180                        
Net Income Attributable to Parent             $ 147,980,000                                  
Net Income Attributable to Noncontrolling Interest                 $ 8,297,000                              
Net income                     156,277,000           156,277,000   156,277,000       156,277,000  
Other comprehensive income - derivative instruments (cash flow hedges)       $ (550,000)       $ (520,000) (30,000)               (550,000)           (550,000)  
Issuance and registration of common shares         $ 2,000 $ 1,040,000                   1,042,000 874,000            
Shares repurchased and retired         0 465,000                     (465,000)              
Exercise of stock options         3,000 12,242,000                     12,245,000              
Shares issued in exchange for units         0 1,419,000     (1,419,000)               0              
Notes To Financial Statements [Abstract]                                                
Stock Issued in Exchange for Redeemable Stock           998,000       $ (998,000)               (998,000)            
Redeemable stock fair market value     $ 985,000       985,000                   (985,000) 985,000         985,000 985,000
Adjustment for Noncontrolling Interest Ownership in operating partnership   $ 117,000 (117,000)     (144,000)     144,000               0           0  
Amortization of unearned compensation     4,631,000     4,631,000                     4,631,000           4,631,000  
Dividends on common stock             222,488,000                   (222,488,000)              
Dividends on noncontrolling interest units                 12,431,000               (12,431,000)              
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2014                     3,051,811,000 $ 752,000 3,619,270,000 (729,086,000) (412,000) $ 161,287,000 3,051,811,000              
Redeemable stock at Dec. 31, 2014                     5,911,000             5,911,000 5,911,000         5,911,000
Notes To Financial Statements [Abstract]                                                
Net Income (Loss) Allocated to Limited Partners   8,297,000                                            
Net Income (Loss) Allocated to General Partners     147,980,000                                          
Issuance of units     1,042,000                                 0     1,042,000 874,000
Units repurchased and retired     (465,000)                                       (465,000)  
Exercise of unit options     12,245,000                                       12,245,000  
General partnership units issued in exchange for limited partnership units   1,419,000 (1,419,000)                                       0  
Partnership units issued in exchange for redeemable units     998,000                                         (998,000)
Distributions   (12,431,000) (222,488,000)                                       (234,919,000)  
Partners' Capital at Dec. 31, 2014                                       161,310,000 2,890,858,000 (376,000) 3,051,792,000  
Development and capital improvements in progress                     80,772,000               80,772,000          
Common stock shares issued (shares)                       116                        
Common stock repurchased and retired (shares)                       13                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period                       7                        
Stock Issued During Period, Shares, Conversion of Units                       28                        
Shares, Outstanding at Dec. 31, 2015                       75,318                        
Net Income Attributable to Parent             332,287,000                                  
Net Income Attributable to Noncontrolling Interest                 18,458,000                              
Net income                     350,745,000           350,745,000   350,745,000       350,745,000  
Other comprehensive income - derivative instruments (cash flow hedges)       $ (1,242,000)       $ (1,177,000) (65,000)               (1,242,000)           (1,242,000)  
Issuance and registration of common shares         1,000 621,000                   0 622,000 $ 924,000            
Shares repurchased and retired         0 958,000                     (958,000)              
Exercise of stock options         0 420,000                     420,000              
Shares issued in exchange for units         $ 0 1,121,000     (1,121,000)               0              
Notes To Financial Statements [Abstract]                                                
SHAREHOLDER’S EQUITY
SHAREHOLDERS' EQUITY OF MAA
 
On December 31, 2015, 75,408,571 shares of common stock of MAA and 4,162,996 partnership units in the Operating Partnership were issued and outstanding, representing a total of 79,571,567 shares and units. At December 31, 2014, 75,267,675 shares of common stock of MAA and 4,191,152 partnership units in the Operating Partnership were outstanding, representing a total of 79,458,827 shares and units. There were 58,112 outstanding options as of December 31, 2015 compared to 74,454 outstanding options as of December 31, 2014.

During the year ended December 31, 2015, 11,914 shares of our common stock were acquired from employees to satisfy minimum tax withholding obligations that arose upon vesting of restricted stock granted pursuant to approved plans. During the year ended December 31, 2014, 9,270 shares were acquired for these purposes.

Noncontrolling Interest

Noncontrolling interest in the accompanying Consolidated Financial Statements relates to the limited partnership interest in the Operating Partnership owned by the holders of the Class A limited partner units of the Operating Partnership, or Class A Units. MAA is the sole general partner of the Operating Partnership and holds all of the outstanding Class B general partner units of the Operating Partnership, or Class B Units. Net income is allocated to MAA and the noncontrolling interest based on their respective ownership percentages of the Operating Partnership. Issuance of additional Class A Units or Class B Units changes the ownership percentage of both the noncontrolling interest and MAA. The issuance of Class B Units generally occurs when MAA issues common stock and the issuance proceeds are contributed to the Operating Partnership in exchange for Class B Units equal to the number of shares of common stock issued. At each reporting period, the allocation between total MAA shareholders’ equity and Noncontrolling interest is adjusted to account for the change in the respective percentage ownership of the underlying equity of the Operating Partnership.

MAA’s Board of Directors established economic rights in respect to each Class A Unit that were equivalent to the economic rights in respect to each share of MAA common stock. The holders of Class A Units may redeem each of their units in exchange for one share of common stock in MAA or cash, at the option of MAA. At December 31, 2015, a total of 4,162,996 Class A Units were outstanding and redeemable to MAA by the holders of the units for 4,162,996 shares of MAA common stock or approximately $378.0 million, based on the closing price of MAA’s common stock on December 31, 2015 of $90.81 per share, at MAA’s option. At December 31, 2014, a total of 4,191,152 Class A Units were outstanding and redeemable to MAA by the holders of the units for 4,191,152 shares of MAA common stock or approximately $313.0 million, based on the closing price of MAA’s common stock on December 31, 2014 of $74.68 per share, at MAA’s option.

The Operating Partnership pays the same per unit distribution in respect to the Class A Units as the per share distribution MAA pays in respect to the common stock. Operating Partnership net income for 2015, 2014 and 2013 was allocated approximately 5.2%, 5.3% and 4.6%, respectively, to holders of Class A Units and 94.8%, 94.7% and 95.4%, respectively, to MAA as the holder of all Class B Units.

Direct Stock Purchase and Distribution Reinvestment Plan

MAA has a Dividend and Distribution Reinvestment and Share Purchase Plan, or DRSPP, pursuant to which MAA’s shareholders have the ability to reinvest all or part of their distributions from MAA’s stock and holders of Class A Units have the ability to reinvest all or part of their distributions from MAALP into MAA’s common stock. The DRSPP also provides the opportunity to make optional cash investments in MAA's common stock of at least $250, but not more than $5,000 in any given month, free of brokerage commissions and charges. MAA, in its absolute discretion, may grant waivers to allow for optional cash payments in excess of $5,000. To fulfill its obligations under the DRSPP, MAA may either issue additional shares of common stock or repurchase common stock in the open market. MAA has registered with the SEC the offer and sale of up to 9,600,000 shares of common stock pursuant to the DRSPP. MAA may elect to sell shares under the DRSPP at up to a 5% discount.

Shares of common stock totaling 8,562 in 2015, 9,055 in 2014, and 10,924 in 2013 were acquired by shareholders under the DRSPP. MAA did not offer a discount for optional cash purchases in 2015, 2014 or 2013.

At the Market Offering

On December 9, 2015, we entered into distribution agreements with J.P. Morgan Securities, LLC, BMO Capital Markets Corp. and KeyBanc Capital Markets Inc. to sell up to an aggregate of 4.0 million shares of common stock, from time-to-time in at-the-market offerings or negotiated transactions through controlled equity offering programs, or ATMs. As of December 31, 2015, there were 4.0 million shares remaining under the ATM program.

During the years ended December 31, 2015 and 2014, MAA did not sell any shares of common stock under its ATMs. As of December 31, 2015, there were 4.0 million shares available for issuance under MAA's ATMs.
 
Stock Repurchase Plan

In 1999, MAA’s Board of Directors approved a stock repurchase plan to acquire up to a total of 4.0 million shares of MAA’s common stock. As of December 8, 2015, MAA had repurchased and retired approximately 1.9 million shares of common stock for a cost of approximately $42.0 million at an average price per common share of $22.54. No shares were repurchased in 2002 through 2015 under the plan. On December 8, 2015, MAA's Board of Directors authorized us to repurchase up to 4.0 million shares of MAA common stock, which represented approximately 5.3% of MAA's common stock outstanding at the time of such authorization. This December 2015 authorization replaced and superseded the 1999 plan, under which approximately 2.1 million shares remained at the time of the December 2015 authorization.  No shares were repurchased from December 8, 2015 through December 31, 2015 under the current authorization.

Exercise of Stock Options

During the years ended December 31, 2015, 2014, and 2013 we issued 7,342 shares, 270,459 shares, and 110,715 shares, respectively, related to the exercise of stock options. These exercises resulted in proceeds of $0.4 million, $12.2 million, and $6.2 million respectively.
                                              
Stock Issued in Exchange for Redeemable Stock           0                     0            
Redeemable stock fair market value     1,415,000       1,415,000                   (1,415,000) $ 1,415,000         1,415,000 1,415,000
Adjustment for Noncontrolling Interest Ownership in operating partnership   164,000 (164,000)     (252,000)     252,000               0           0  
Amortization of unearned compensation     6,852,000     $ 6,852,000                     6,852,000           6,852,000  
Dividends on common stock             $ 235,927,000                   (235,927,000)              
Dividends on noncontrolling interest units                 $ 13,085,000               (13,085,000)              
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2015                     3,157,823,000 $ 753,000 $ 3,627,074,000 $ (634,141,000) $ (1,589,000) $ 165,726,000 $ 3,157,823,000              
Redeemable stock at Dec. 31, 2015                     8,250,000             $ 8,250,000 8,250,000         8,250,000
Notes To Financial Statements [Abstract]                                                
Net Income (Loss) Allocated to Limited Partners   18,458,000                                            
Net Income (Loss) Allocated to General Partners     332,287,000                                          
Issuance of units     622,000                                 0     622,000 924,000
Units repurchased and retired     (958,000)                                       (958,000)  
Exercise of unit options     420,000                                       420,000  
General partnership units issued in exchange for limited partnership units   1,121,000 (1,121,000)                                       0  
Partnership units issued in exchange for redeemable units     0                                       0 $ 0
Distributions   $ (13,085,000) $ (235,927,000)                                       (249,012,000)  
Partners' Capital at Dec. 31, 2015                                       $ 165,726,000 $ 2,993,696,000 $ (1,618,000) $ 3,157,804,000  
Development and capital improvements in progress                     $ 44,355,000               $ 44,355,000