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Property and equipment (Tables)
12 Months Ended
Dec. 31, 2011
Property and Equipment

Property and equipment were comprised of the following:

 

     December 31,  
     2011     2010  

Land

   $ 23,004      $ 23,182   

Buildings

     34,173        33,937   

Leasehold improvements

     1,266,499        1,106,935   

Equipment and information systems

     1,269,343        1,107,778   

New center and capital asset projects in progress

     144,124        38,721   
  

 

 

   

 

 

 
     2,737,143        2,310,553   

Less accumulated depreciation and amortization

     (1,304,492     (1,139,745
  

 

 

   

 

 

 
   $ 1,432,651      $ 1,170,808