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Notes and Accounts Receivables (Tables)
 12 Months Ended
Dec. 31, 2012
Receivables [Abstract]  
Components of Notes and Accounts Receivables
At December 31, 2012 and 2011, notes and accounts receivables included the following (in thousands):
 
 
2012
 
2011
Notes receivable
$
2,885

 
$
7,580

Allowance for doubtful accounts related to notes receivable
(1,026
)
 
(4,294
)
Tenant and other receivables
8,830

 
10,063

Allowance for doubtful accounts related to tenant and other receivables
(717
)
 
(1,990
)
 
$
9,972

 
$
11,359