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Net Change In Operating Accounts
 9 Months Ended
Sep. 30, 2012
Increase (Decrease) in Operating Capital [Abstract]  
Net Change In Operating Accounts
11. Net Change in Operating Accounts
The effect of changes in the operating accounts and other on cash flows from operating activities is as follows:  
 
Nine Months Ended
  
September 30,
(in thousands)
2012
 
2011
Change in assets:
 
 
 
Other assets, net
$
(8,765
)
 
$
3,046

Change in liabilities:
 
 
 
Accounts payable and accrued expenses
11,759

 
11,343

Accrued real estate taxes
20,230

 
15,048

Other liabilities
(16,322
)
 
(13,131
)
Other
599

 
401

Change in operating accounts and other
$
7,501

 
$
16,707