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Weighted Average Shares Outstanding (Tables) | 12 Months Ended
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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 |

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