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Financial instruments by category
 12 Months Ended
Dec. 31, 2017
Text block1 [abstract]  
Financial instruments by category
25. Financial instruments by category

Fair value

The following table provides the carrying value and the fair value of financial instruments at December 31, 2017 and December 31, 2016:

 

     December 31, 2017          December 31, 2016  
     Carrying amount      Fair value          Carrying amount      Fair value  
     $      $          $      $  

Financial Assets

              

Available-for-sale

              

  Marketable securities

      5,010        5,010          28,327        28,327  

Loans and receivables

              

  Cash and cash equivalents

      479,501        479,501          883,171        883,171  

  Term deposit

      5,508        5,508          5,292        5,292  

  Restricted cash

      310        310          240        240  

  Accounts receivable and other

      33,627        33,627          32,159        32,159  

  Other assets

      17,517        17,517          1,810        1,810  

Financial Liabilities at amortized cost

              

  Accounts payable and accrued liabilities

      110,651        110,651          90,705        90,705  

  Debt

      593,783        595,698          591,589        609,000