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Earnings Per Common Share of MAA (Tables)
 3 Months Ended
Mar. 31, 2015
Earnings Per Common Share of MAA [Abstract]  
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]
Basic earnings per share is computed by dividing net income attributable to common shareholders by the weighted average number of shares outstanding during the period.  All outstanding unvested restricted share awards contain rights to non-forfeitable dividends and participate in undistributed earnings with common shareholders and, accordingly, are considered participating securities that are included in the two-class method of computing basic earnings per share. Both the unvested restricted shares and other potentially dilutive common shares, and the related impact to earnings, are considered when calculating earnings per share on a diluted basis with our diluted earnings per share being the more dilutive of the treasury stock or two-class methods.  OP Units are included in dilutive earnings per share calculations when they are dilutive to earnings per share. For the three months ended March 31, 2015 and 2014, MAA's basic earnings per share is computed using the two-class method, and our diluted earnings per share is computed using the more dilutive of the treasury stock method or two-class method:

(dollars and shares in thousands, except per share amounts)
Three months ended March 31,
 
2015
 
2014
 
Shares Outstanding
 
 
 
 
Weighted average common shares - basic
75,145

 
74,803

 
Weighted average partnership units outstanding
—

(1) 
—

(1) 
Effect of dilutive securities
—

(2) 
—

(2) 
Weighted average common shares - diluted
75,145

 
74,803

 
 
 
 
 
 
Calculation of Earnings per Share - basic
 

 
 

 
Income from continuing operations
$
64,244

 
$
9,819

 
Income from continuing operations attributable to noncontrolling interests
(3,387
)
 
(534
)
 
Income from continuing operations allocated to unvested restricted shares
(130
)
 
(17
)
 
Income from continuing operations available for common shareholders, adjusted
$
60,727

 
$
9,268

 
 
 
 
 
 
Income from discontinued operations
$
433

 
$
5,895

 
Income from discontinued operations attributable to noncontrolling interest
(23
)
 
(314
)
 
Income from discontinued operations allocated to unvested restricted shares
(1
)
 
(10
)
 
Income from discontinued operations available for common shareholders, adjusted
$
409

 
$
5,571

 
 
 
 
 
 
Weighted average common shares - basic
75,145

 
74,803

 
Earnings per share - basic
$
0.81

 
$
0.20

 
 
 
 
 
 
Calculation of Earnings per Share - diluted
 

 
 

 
Income from continuing operations
$
64,244

 
$
9,819

 
Income from continuing operations attributable to noncontrolling interests
(3,387
)
(1) 
(534
)
(1) 
Income from continuing operations allocated to unvested restricted shares
(130
)
(2) 
(17
)
(2) 
Income from continuing operations available for common shareholders, adjusted
$
60,727

 
$
9,268

 
 
 
 
 
 
Income from discontinued operations
$
433

 
$
5,895

 
Income from discontinued operations attributable to noncontrolling interest
(23
)
(1) 
(314
)
(1) 
Income from discontinued operations allocated to unvested restricted shares
(1
)
(2) 
(10
)
(2) 
Income from discontinued operations available for common shareholders, adjusted
$
409

 
$
5,571

 
 
 
 
 
 
Weighted average common shares - diluted
75,145

 
74,803

 
Earnings per share - diluted
$
0.81

 
$
0.20

 

(1) For both the three months ended March 31, 2015 and 2014, 4.2 million operating partnership units and their related income are not included in the diluted earnings per share calculations as they are not dilutive.

(2) For both the three months ended March 31, 2015 and 2014, 0.1 million potentially dilutive securities and their related income are not included in the diluted earnings per share calculations as they are not dilutive.