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

Property and equipment consists of the following (in thousands):

 

     December 31,  
     2017      2016  

Building

   $ 33,024      $ 26,572  

Land

     6,683        6,683  

Equipment and other

     253,453        213,521  
  

 

 

    

 

 

 
     293,160        246,776  

Accumulated depreciation

     (169,624      (143,708
  

 

 

    

 

 

 
   $ 123,536      $ 103,068