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Shares - Share purchase program (Details) - CAD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Apr. 09, 2021 | Dec. 31, 2022 | Apr. 11, 2022
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares purchased and subsequently cancelled during period (in shares) |  | 2,195,646 |
2022 NCIB |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Maximum number of shares to be purchased (in shares) |  |  | 2,113,054
Common shares |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares purchased and subsequently cancelled during period (in shares) |  | 2,195,646 |
Common shares | 2022 NCIB |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares purchased and subsequently cancelled during period (in shares) |  | 2,113,054 |
Increase (decrease) as a result of the retirement of shares |  | $ 16,824 |
Common shares | 2021 NCIB |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares purchased and subsequently cancelled during period (in shares) | 82,592 |  |
Increase (decrease) as a result of the retirement of shares | $ 665 |  |
Additional paid-in capital | 2022 NCIB |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Increase (decrease) as a result of the retirement of shares |  | $ 15,827 |
Additional paid-in capital | 2021 NCIB |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Increase (decrease) as a result of the retirement of shares | $ 816 |  |

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