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Per share amounts (Schedule of Earnings Per Share computation per common share) (Details) - CAD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Basic earnings (loss) per share computation
Net earnings (loss) attributable to equity holders	$ 89,382	$ (102,577)
Weighted average common shares outstanding	405,494,353	397,630,947
Basic earnings (loss) per common share	$ 0.22	$ (0.26)
Diluted earnings (loss) per share computation
Net earnings (loss) attributable to equity holders	$ 89,382	$ (102,577)
Weighted average common shares outstanding	405,494,353	397,630,947
Dilutive effect of stock options	1,641,000	0
Weighted average common shares outstanding, assuming dilution	407,135,000	397,631,000
Diluted earnings (loss) per common share	$ 0.22	$ (0.26)

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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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

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