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Shareholder's capital - Performance Stock Units (Detail) - CAD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Weighted average remaining contractual term (years) |  |  |
Exercisable , weighted average remaining contractual term | 4 years 6 months |  |
PSUs and RSUs |  |  |
Number of awards |  |  |
Beginning balance (in shares) | 2,109,710 | 2,443,672 |
Granted, including dividends (in shares) | 2,841,967 | 1,090,457 |
Exercised (in shares) | (922,883) | (1,221,620) |
Forfeited (in shares) | (451,047) | (202,799) |
Ending balance (in shares) | 3,577,747 | 2,109,710 | 2,443,672
Exercisable (in shares) | 597,363 |  |
Weighted average grant-date fair value |  |  |
Beginning balance (in USD per share) | $ 18.38 | $ 18.07 |
Granted, including dividends (in USD per share) | 10.98 | 17.99 |
Exercised (in USD per share) | 18.73 | 12.62 |
Forfeited (in USD per share) | 15.07 | 18.94 |
Ending balance (in USD per share) | 18.38 | $ 18.38 | $ 18.07
Exercisable (in USD per share) | $ 19.98 |  |
Weighted average remaining contractual term (years) |  |  |
Outstanding, weighted average remaining contractual term | 1 year 9 months 3 days | 1 year 9 months 3 days | 1 year 8 months 19 days
Granted, including dividends, weighted average remaining contractual term | 2 years 7 days | 2 years |
Outstanding, aggregate intrinsic value | $ 29,910 | $ 18,608 | $ 44,646
Granted, including dividends, aggregate intrinsic value | 25,329 | 17,524 |
Exercised, aggregate intrinsic value | 10,125 | 23,636 |
Forfeited, aggregate intrinsic value | $ 3,771 | $ 418 |
Exercisable , weighted average remaining contractual term | 2 months 19 days |  |
Exercisable, aggregate intrinsic value | $ 4,994 |  |

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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (e)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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