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Property and Equipment (Tables)
 12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Schedule of Property and Equipment

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

 

     As of December 31,  
     2018      2017  

Land

    $ —        $ 66  

Buildings

      —          218  

Leasehold improvements

      6,717        6,152  

Furniture, fixtures and equipment

      38,369        30,863  

Vehicles and equipment

      177,969        153,744  
  

 

 

     

 

 

  
     223,055        191,043  

Less: accumulated depreciation and amortization

      (132,938 )       (109,968 ) 
  

 

 

     

 

 

  
   $ 90,117      $ 81,075  
  

 

 

     

 

 

  
Schedule of Depreciation and Amortization Expense on Property and Equipment, by Income Statement Category

During the twelve months ended December 31, 2018 and 2017 we recorded the following depreciation and amortization expense on our property and equipment, by income statement category (in thousands):

 

     As of December 31,  
     2018      2017      2016  

Cost of sales

    $ 31,526      $ 26,731      $ 22,294  

Administrative

      1,779        1,554        1,276