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Noncontrolling Interests
6 Months Ended
Jun. 30, 2011
Noncontrolling Interests [Abstract]  
Noncontrolling Interests
7.      Noncontrolling Interests

Noncontrolling Interests in the Operating Partnership

Noncontrolling interests in the Operating Partnership relate to the ownership of Common Units by various individuals and entities other than the Company. The following table sets forth noncontrolling interests in the Operating Partnership:

   
Six Months Ended
June 30,
 
   
2011
 
2010
 
Beginning noncontrolling interests in the Operating Partnership
 
$
120,838
 
$
129,769
 
Adjustments of noncontrolling interests in the Operating Partnership to fair value
   
6,957
   
(20,612
)
Conversion of Common Units to Common Stock
   
(635
)
 
(2,958
)
Net income attributable to noncontrolling interests in the Operating Partnership
   
1,130
   
2,453
 
Distributions to noncontrolling interests in the Operating Partnership
   
(3,215
)
 
(3,243
)
Total noncontrolling interests in the Operating Partnership
 
$
125,075
 
$
105,409
 

The following table sets forth net income available for common stockholders and transfers from noncontrolling interests in the Operating Partnership:

   
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
   
2011
 
2010
 
2011
 
2010
 
Net income available for common stockholders                                                                               
 
$
10,112
 
$
36,224
 
$
20,248
 
$
45,895
 
Increase in additional paid in capital from conversion of Common Units to Common Stock
   
449
   
33
   
635
   
2,957
 
Change in equity from net income available for common stockholders and conversion of Common Units to Common Stock
 
$
10,561
 
$
36,257
 
$
20,883
 
$
48,852
 

Noncontrolling Interests in Consolidated Affiliates

At June 30, 2011, noncontrolling interests in consolidated affiliates relates to our joint venture partner’s 50.0% interest in office properties located in Richmond, VA. Our joint venture partner is an unrelated third party.