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Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Summary of Property and Equipment

Property and equipment consist of the following:

 

     As of December 31,  
     2017      2016  

Land

   $ 160,126      $ 127,769  

Land improvements

     25,630        23,158  

Buildings

     595,384        559,791  

Building and leasehold improvements

     117,460        105,168  

Equipment under capital leases

     5,937        5,943  

Computer equipment

     116,477        108,551  

Furniture, fixtures and equipment

     63,470        59,300  

Internally developed software

     36,173        30,407  

Other

     1,176        1,176  

Construction in progress

     32,390        19,112  
  

 

 

    

 

 

 
     1,154,223        1,040,375  

Less accumulated depreciation and amortization

     (231,939      (184,847
  

 

 

    

 

 

 

Property and equipment, net

   $ 922,284      $ 855,528