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v3.22.4

Shares - Common shares (Details) - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance, outstanding (in shares) | 28,458,115 | 29,166,630
Issued upon exercise of stock options (in shares) |  | 125,000
Retired through share purchase programs (in shares) | (2,195,646) | (1,113,903)
Purchase of treasury shares (in shares) | (26,012) | (21,503)
Settlement of certain equity classified stock-based compensation (in shares) | 184,364 | 301,891
Ending balance, outstanding (in shares) | 26,420,821 | 28,458,115
Shares to satisfy recipient tax withholding requirements (in shares) | 112,583,000 | 274,359,000
Satisfaction of recipient tax withholding | $ 1,591 | $ 5,134
Common shares |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance, outstanding (in shares) | 30,022,928 | 31,011,831
Issued upon exercise of stock options (in shares) |  | 125,000
Retired through share purchase programs (in shares) | (2,195,646) | (1,113,903)
Purchase of treasury shares (in shares) | 0 | 0
Settlement of certain equity classified stock-based compensation (in shares) | 0 | 0
Ending balance, outstanding (in shares) | 27,827,282 | 30,022,928
Treasury shares |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance, outstanding (in shares) | (1,564,813) | (1,845,201)
Issued upon exercise of stock options (in shares) |  | 0
Retired through share purchase programs (in shares) | 0 | 0
Purchase of treasury shares (in shares) | (26,012) | (21,503)
Settlement of certain equity classified stock-based compensation (in shares) | 184,364 | 301,891
Ending balance, outstanding (in shares) | (1,406,461) | (1,564,813)

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