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Share-based payment arrangements - Summary of range of exercise prices of outstanding share options (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 shares $ / shares | Dec. 31, 2020 shares $ / shares | Dec. 31, 2019 shares $ / shares
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Option outstanding, Shares | shares | 4,250,738 | 5,092,388 | 5,714,491
Option outstanding, Weighted average exercise price | $ 11.32 | $ 11.56 | $ 14.08
Employee stock option plan |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Option outstanding, Shares | shares | 4,250,738 |  |
Option outstanding, weighted average remaining contractual life (years) | 2 years 4 months 24 days |  |
Option outstanding, Weighted average exercise price | $ 11.32 |  |
Shares, exercisable (in shares) | shares | 2,254,702 |  |
Weighted average exercise price, exercisable (in CDN$ per share) | $ 11.51 |  |
Employee stock option plan | $5.00 to $5.99 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Option outstanding, Shares | shares | 1,379,016 |  |
Option outstanding, weighted average remaining contractual life (years) | 2 years 2 months 12 days |  |
Option outstanding, Weighted average exercise price | $ 5.68 |  |
Shares, exercisable (in shares) | shares | 848,105 |  |
Weighted average exercise price, exercisable (in CDN$ per share) | $ 5.68 |  |
Employee stock option plan | $5.00 to $5.99 | Bottom of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | 5.00 |  |
Employee stock option plan | $5.00 to $5.99 | Top of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | $ 5.99 |  |
Employee stock option plan | $6.00 to $6.99 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Option outstanding, Shares | shares | 422,924 |  |
Option outstanding, weighted average remaining contractual life (years) | 1 year 3 months 18 days |  |
Option outstanding, Weighted average exercise price | $ 6.20 |  |
Shares, exercisable (in shares) | shares | 422,924 |  |
Weighted average exercise price, exercisable (in CDN$ per share) | $ 6.20 |  |
Employee stock option plan | $6.00 to $6.99 | Bottom of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | 6.00 |  |
Employee stock option plan | $6.00 to $6.99 | Top of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | $ 6.99 |  |
Employee stock option plan | $10.00 to $10.99 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Option outstanding, Shares | shares | 152,941 |  |
Option outstanding, weighted average remaining contractual life (years) | 2 years 10 months 24 days |  |
Option outstanding, Weighted average exercise price | $ 10.40 |  |
Shares, exercisable (in shares) | shares | 101,960 |  |
Weighted average exercise price, exercisable (in CDN$ per share) | $ 10.40 |  |
Employee stock option plan | $10.00 to $10.99 | Bottom of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | 10.00 |  |
Employee stock option plan | $10.00 to $10.99 | Top of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | $ 10.99 |  |
Employee stock option plan | $12.00 to $12.99 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Option outstanding, Shares | shares | 683,895 |  |
Option outstanding, weighted average remaining contractual life (years) | 3 years 2 months 12 days |  |
Option outstanding, Weighted average exercise price | $ 12.90 |  |
Shares, exercisable (in shares) | shares | 222,251 |  |
Weighted average exercise price, exercisable (in CDN$ per share) | $ 12.90 |  |
Employee stock option plan | $12.00 to $12.99 | Bottom of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | 12.00 |  |
Employee stock option plan | $12.00 to $12.99 | Top of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | $ 12.99 |  |
Employee stock option plan | $13.00 to $13.99 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Option outstanding, Shares | shares | 932,028 |  |
Option outstanding, weighted average remaining contractual life (years) | 4 years 1 month 6 days |  |
Option outstanding, Weighted average exercise price | $ 13.24 |  |
Shares, exercisable (in shares) | shares | 12,879 |  |
Weighted average exercise price, exercisable (in CDN$ per share) | $ 13.50 |  |
Employee stock option plan | $13.00 to $13.99 | Bottom of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | 13.00 |  |
Employee stock option plan | $13.00 to $13.99 | Top of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | $ 13.99 |  |
Employee stock option plan | $14.00 to $14.99 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Option outstanding, Shares | shares | 33,351 |  |
Option outstanding, weighted average remaining contractual life (years) | 4 years 2 months 12 days |  |
Option outstanding, Weighted average exercise price | $ 14.60 |  |
Shares, exercisable (in shares) | shares | 0 |  |
Weighted average exercise price, exercisable (in CDN$ per share) | $ 0 |  |
Employee stock option plan | $14.00 to $14.99 | Bottom of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | 14.00 |  |
Employee stock option plan | $14.00 to $14.99 | Top of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | $ 14.99 |  |
Employee stock option plan | $22.00 to $22.99 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Option outstanding, Shares | shares | 494,650 |  |
Option outstanding, weighted average remaining contractual life (years) | 1 month 6 days |  |
Option outstanding, Weighted average exercise price | $ 22.00 |  |
Shares, exercisable (in shares) | shares | 494,650 |  |
Weighted average exercise price, exercisable (in CDN$ per share) | $ 22.00 |  |
Employee stock option plan | $22.00 to $22.99 | Bottom of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | 22.00 |  |
Employee stock option plan | $22.00 to $22.99 | Top of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | $ 22.99 |  |
Employee stock option plan | $23.00 to $23.99 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Option outstanding, Shares | shares | 151,933 |  |
Option outstanding, weighted average remaining contractual life (years) | 2 months 12 days |  |
Option outstanding, Weighted average exercise price | $ 23.18 |  |
Shares, exercisable (in shares) | shares | 151,933 |  |
Weighted average exercise price, exercisable (in CDN$ per share) | $ 23.18 |  |
Employee stock option plan | $23.00 to $23.99 | Bottom of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | 23.00 |  |
Employee stock option plan | $23.00 to $23.99 | Top of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise price (in $CDN per share) | $ 23.99 |  |

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