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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