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Net Change In Operating Accounts
 6 Months Ended
Jun. 30, 2013
Increase (Decrease) in Operating Capital [Abstract]  
Net Change In Operating Accounts
9. Net Change in Operating Accounts
The effect of changes in the operating accounts and other on cash flows from operating activities is as follows:  
 
Three Months Ended
  
June 30,
(in thousands)
2013
 
2012
Change in assets:
 
 
 
Other assets, net
$
(2,694
)
 
$
(4,884
)
Change in liabilities:
 
 
 
Accounts payable and accrued expenses
(12,485
)
 
(10,120
)
Accrued real estate taxes
7,916

 
8,718

Other liabilities
2,014

 
(9,477
)
Other
521

 
397

Change in operating accounts and other
$
(4,728
)
 
$
(15,366
)