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Net Change In Operating Accounts
 12 Months Ended
Dec. 31, 2012
Increase (Decrease) in Operating Capital [Abstract]  
Net Change In Operating Accounts
13. Net Change in Operating Accounts
The effect of changes in the operating accounts and other on cash flows from operating activities is as follows:
 
 
Year Ended December 31,
(in thousands)
2012
 
2011
 
2010
Change in assets:
 
 
 
 
 
Other assets, net
$
(2,443
)
 
$
5,183

 
$
(895
)
Change in liabilities:
 
 
 
 
 
Accounts payable and accrued expenses
2,320

 
2,026

 
2,209

Accrued real estate taxes
5,640

 
(122
)
 
(1,269
)
Other liabilities
(16,192
)
 
(17,152
)
 
4,188

Other
816

 
596

 
275

Change in operating accounts and other
$
(9,859
)
 
$
(9,469
)
 
$
4,508