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Weighted Average Shares Outstanding (Tables)
 12 Months Ended
Dec. 31, 2018
Investments accounted for using equity method [abstract]  
Schedule of Basic and Diluted Common Shares Outstanding, Calculated on Weighted Average Basis

The number of basic shares outstanding and diluted common shares, calculated on a weighted average basis, is as follows:

 

     December 31        December 31  
                             2018                              2017  
       #        #  

Basic shares outstanding

      113,733,118        113,991,507  

Share options (dilutive effect of 507,066 options; 2017 – 4,426,237 options)

      89,200        361,413  

Diluted shares

      113,822,318        114,352,920