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Earnings Per OP Unit of MAALP (Tables)
 3 Months Ended
Mar. 31, 2019
Earnings Per OP Unit of MAALP [Abstract]  
Schedule of Earnings Per Unit, Basic and Diluted [Table Text Block]
For the three months ended March 31, 2019 and 2018, MAA's diluted earnings per common unit was computed using the treasury stock method and the two-class method, respectively, as presented below (dollars and units in thousands, except per unit amounts):

 
Three months ended March 31,
 
2019
 
2018
Calculation of Earnings per Common Unit - basic
 
 
 
Net income
$
65,958

 
$
50,820

Unvested restricted stock (allocation of earnings)
(87
)
 
(79
)
Preferred unit distributions
(922
)
 
(922
)
Net income available for common unitholders, adjusted
$
64,949

 
$
49,819

 
 
 
 
Weighted average common units - basic
117,837

 
117,689

Earnings per common unit - basic
$
0.55

 
$
0.42

 
 
 
 
Calculation of Earnings per Common Unit - diluted
 
 
 
Net income
$
65,958

 
$
50,820

Unvested restricted stock (allocation of earnings) (1)
—

 
(79
)
Preferred unit distributions
(922
)
 
(922
)
Net income available for common unitholders, adjusted
$
65,036

 
$
49,819

 
 
 
 
Weighted average common units - basic
117,837

 
117,689

Effect of dilutive securities (1)
207

 
—

Weighted average common units - diluted
118,044

 
117,689

Earnings per common unit - diluted
$
0.55

 
$
0.42


(1) For the three months ended March 31, 2018, 0.2 million potentially dilutive securities and their related income are not included in the diluted earnings per share calculation as they are not dilutive.