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Fee and Other Income (Tables)
9 Months Ended
Sep. 30, 2011
Fee And Other Income Tables [Abstract] 
Fee and Other Income (Table)
   For the Three Months For the Nine Months  
  (Amounts in thousands) Ended September 30, Ended September 30,  
   2011 2010 2011 2010  
 Tenant cleaning fees $ 15,647 $ 13,613 $ 46,479 $ 40,733  
 Management and leasing fees   4,361   3,555   15,456   16,075  
 Lease termination fees   4,803   2,301   12,478   10,112  
 Other income   12,195   12,797   37,826   37,918  
   $ 37,006 $ 32,266 $ 112,239 $ 104,838