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Per share amounts (Details) - CAD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Basic earnings (loss) per share computation
Net earnings (loss) attributable to equity holders	$ 74,000	$ 166,323
Weighted average common shares outstanding	395,796,677	395,792,732
Basic earnings (loss) per common share	$ 0.19	$ 0.42
Diluted earnings (loss) per share computation
Net earnings (loss) attributable to equity holders	$ 74,000	$ 166,323
Weighted average common shares outstanding	395,796,677	395,792,732
Dilutive effect of stock options	258,000	257,000
Weighted average common shares outstanding, assuming dilution	396,055,000	396,050,000
Diluted earnings (loss) per common share	$ 0.19	$ 0.42

X

- Definition

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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