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Noncontrolling Interests
 12 Months Ended
Dec. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Noncontrolling Interests
Noncontrolling Interests
The following table summarizes the effect of changes in our ownership interest in subsidiaries on the equity attributable to us as follows (in thousands):
 
Year Ended December 31,
 
2012
 
2011
 
2010
Net income adjusted for noncontrolling interests
$
146,640

 
$
15,621

 
$
46,206

Transfers from the noncontrolling interests:
 
 
 
 
 
Increase in equity for operating partnership units
—

 
—

 
746

Net increase (decrease) in equity for the acquisition of
noncontrolling interests
394

 
1,668

 
(879
)
Change from net income adjusted for noncontrolling interests
and transfers from the noncontrolling interests
$
147,034

 
$
17,289

 
$
46,073