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Other assets
 12 Months Ended
Dec. 31, 2017
Text block1 [abstract]  
Other assets
17.

Other assets

 

     2017      2016  

Current -

      

Interest receivable

    $ 10,443      $ 6,741  

Other

      1,258        909  
  

 

 

     

 

 

  
     11,701        7,650  

Non-current -

      

Guarantee deposits

      14,568        10,401  

Deposits for litigation

      12,390        12,482  

Other

      4,182        4,182  
  

 

 

     

 

 

  
     31,140        27,065  
  

 

 

     

 

 

  
   $ 42,841      $ 34,715  
  

 

 

     

 

 

  

Guarantee deposits are mainly amounts paid to fuel suppliers, as required at the inception of the agreements (see note 23).

Deposit for litigation is cash deposited into the escrow account until the related dispute is settled (see note 21).