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Noncontrolling Interests
6 Months Ended
Jun. 30, 2012
Noncontrolling Interests [Abstract]  
Noncontrolling Interests
15. Noncontrolling Interests
The following table summarizes the effect of changes in our ownership interest in subsidiaries on the equity attributable to common shareholders for the six months ended June 30:
 
(in thousands)
2012
 
2011
Net income (loss) attributable to common shareholders
$
110,521

 
$
(9,311
)
Transfers from the noncontrolling interests:
 
 
 
Increase (decrease) in equity for conversion of operating partnership units
448

 
592

Change in common equity and net transfers from noncontrolling interests
$
110,969

 
$
(8,719
)