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Net Change In Operating Accounts (Tables)
 3 Months Ended
Mar. 31, 2012
Increase (Decrease) in Operating Capital [Abstract]  
Effect Of Changes In The Operating Accounts On Cash Flows From Operating Activities
The effect of changes in the operating accounts and other on cash flows from operating activities is as follows:  
 
Three Months Ended
  
March 31,
(in thousands)
2012
 
2011
Change in assets:
 
 
 
Other assets, net
$
(62
)
 
$
3,633

Change in liabilities:
 
 
 
Accounts payable and accrued expenses
9,549

 
831

Accrued real estate taxes
(4,244
)
 
(5,753
)
Other liabilities
(4,912
)
 
(381
)
Other
197

 
69

Change in operating accounts/other
$
528

 
$
(1,601
)