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Share Based Compensation Plans - Additional Information (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 CAD ($) shares | Dec. 31, 2020 CAD ($) shares
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Option vesting period | 3 years |
Option expiration term | 7 years |
Stock-based compensation expense | $ (56,513) | $ (4,355)
Net earnings (loss) | $ (177,386) | (120,138)
Number of other equity instruments exercised or vested in share-based payment arrangement | shares | 131,950 |
Restricted Share Units (RSUs) [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Shares granted to eligible employees vest term | 3 years |
Stock-based compensation expense | $ (17,168) | $ (3,119)
Number of other equity instruments exercised or vested in share-based payment arrangement | shares | 216,820 | 127,884
Performance Share Units (PSUs) [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Shares granted to eligible employees vest term | 3 years |
Stock-based compensation expense | $ (18,634) | $ (2,787)
Number of other equity instruments exercised or vested in share-based payment arrangement | shares | 40,515 | 39,028
U.S. Share Options [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Stock-based compensation expense | $ 200 | $ 1,000
Executive Performance Share Units [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Share unit vesting period | 3 years |
Stock-based compensation expense | $ (17,646) |
Net earnings (loss) | $ 18,000 | $ 15,000
Number of other equity instruments exercised or vested in share-based payment arrangement | shares | 96,355 | 57,442
Share based compensation number of shares vested | shares | 263,900 |

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