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Leasehold Improvements, Equipment, Land and Construction in Progress, net (Tables)
 12 Months Ended
Dec. 31, 2013
Leasehold Improvements, Equipment, Land and Construction in Progress, net  
Summary of leasehold improvements, equipment, and construction in progress and related accumulated depreciation and amortization

 

 

 
    
   December 31  
 
   Ranges of Estimated Useful Life   2013   2012  

Equipment

   2 - 5 Years   $ 30,563   $ 28,498  

Software

   3 - 10 Years     19,063     15,031  

Vehicles

   4 Years     8,075     9,353  

Other

   10 Years     282     367  

Leasehold improvements

   Shorter of lease term or economic life up to 10 years     18,642     17,920  

Construction in progress

         5,212     2,086  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​

 

         81,837     73,255  

Less accumulated depreciation and amortization

         (38,202 )   (35,152 )
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​

 

         43,635     38,103  

Land

         1,250     2,299  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Leasehold improvements, equipment, land and construction in progress, net

       $ 44,885   $ 40,402  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​ ​ ​