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Shareholder's capital - Share-Based Compensation Expense (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 17, 2024 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Schedule Of Employee Service Share Based Compensation Expense Allocation [Line Items] |  |  |  |  |
Total share-based compensation |  | $ 5,172 | $ 3,199 | $ 10,282 | $ 3,895
Unrecognized compensation costs, non-vested awards |  | $ 22,953 |  | $ 22,953 |
Non vested share based awards recognized over period of time |  |  |  | 1 year 4 months 24 days |
Common shares |  |  |  |  |
Schedule Of Employee Service Share Based Compensation Expense Allocation [Line Items] |  |  |  |  |
Number of shares issued pursuant to public offering (in shares) | 76,909,700 |  |  |  |
PSUs and RSUs |  |  |  |  |
Schedule Of Employee Service Share Based Compensation Expense Allocation [Line Items] |  |  |  |  |
Granted (in shares) |  |  |  | 2,302,209 |
Share based awards settled for cash value as payment for tax withholding (in shares) |  |  |  | 128,313 |
PSUs and RSUs | Common shares |  |  |  |  |
Schedule Of Employee Service Share Based Compensation Expense Allocation [Line Items] |  |  |  |  |
Number of shares issued pursuant to public offering (in shares) |  |  |  | 170,943 |
PSUs and RSUs | Public Stock Offering | Common shares |  |  |  |  |
Schedule Of Employee Service Share Based Compensation Expense Allocation [Line Items] |  |  |  |  |
Number of shares issued pursuant to public offering (in shares) |  |  |  | 299,256 |
Bonus Deferral Restricted Stock Units |  |  |  |  |
Schedule Of Employee Service Share Based Compensation Expense Allocation [Line Items] |  |  |  |  |
Shares issued during period (in shares) |  |  |  | 45,218 |
Awards vested (percent) |  |  |  | 100.00% |
Deferred Share Units |  |  |  |  |
Schedule Of Employee Service Share Based Compensation Expense Allocation [Line Items] |  |  |  |  |
Share based awards settled for cash value as payment for tax withholding (in shares) |  |  |  | 186,929 |
Exercise of share-based awards settled (in shares) |  |  |  | 108,752 |
Common shares issued from treasury (in shares) |  |  |  | 181,374 |
Deferred Share Units | Common shares |  |  |  |  |
Schedule Of Employee Service Share Based Compensation Expense Allocation [Line Items] |  |  |  |  |
Exchange of common shares ( in shares) |  |  |  | 368,303 |

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