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(Loss) earnings per share (Tables)
12 Months Ended
Dec. 31, 2022
Weighted average ordinary shares used in calculating basic and diluted earnings per share [abstract]  
Summary of Weighted Average Shares and Adjusted Weighted Average Shares
The weighted average number of common shares for the purposes of diluted (loss) earnings per share reconciles to the weighted average number of common shares used in the calculation of basic (loss) earnings per share as follows:
December 31, 2022December 31, 2021
Weighted average number of common shares used in the calculation of basic (loss) earnings per share183,445,861 180,296,588 
Dilutive impact of share options— 1,008,339 
Dilutive impact of restricted share units and restricted share units with performance criteria— 246,560 
Dilutive impact of performance share units— 213,420 
Weighted average number of common shares used in the calculation of diluted (loss) earnings per share183,445,861 181,764,907