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Non-controlling Interests
12 Months Ended
Dec. 31, 2014
Noncontrolling Interest [Line Items]  
Noncontrolling Interest Disclosure [Text Block]
14. Non-controlling Interests
The following table summarizes the effect of changes in our ownership interest in subsidiaries on the equity attributable to common shareholders for each of the years ended December 31:
 
 
2014
 
2013
 
2012
Net income attributable to common shareholders
$
292,089

 
$
336,364

 
$
283,390

Transfers from the non-controlling interests:
 
 
 
 
 
Increase in equity for conversion and redemption of operating partnership units
52

 
52

 
8,994

Decrease in additional paid-in-capital for acquisition of remaining non-controlling interests in three consolidated joint ventures (1)

 

 
(19,549
)
Change in common equity and net transfers from non-controlling interests
$
292,141

 
$
336,416

 
$
272,835

(1) During the year ended December 31, 2012, we purchased the remaining non-controlling ownership interest in three fully consolidated joint ventures, comprised of 680 units located in Houston, Texas and Charlotte, North Carolina.