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Expendable parts and supplies
 12 Months Ended
Dec. 31, 2017
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Expendable parts and supplies
11.

Expendable parts and supplies

 

     2017      2016  

Material for repair and maintenance

    $ 79,424      $ 71,876  

Other inventories

      3,058        3,101  
  

 

 

     

 

 

  
     82,482        74,977  

Allowance for obsolescence

      (657 )       (475 ) 
  

 

 

     

 

 

  
   $ 81,825      $ 74,502  
  

 

 

     

 

 

  

Expendable parts and supplies recognized as an expense in the accompanying consolidated statement of profit or loss under “Maintenance, materials and repairs” amount to $ 28.1 million, $24.7 million and $27.2 million, for the years ended December 31, 2017, 2016 and 2015, respectively.