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Reconciliation of Earnings Per Share Calculations - Summary of Reconciliation of Earnings Per Share Calculations (Detail)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2022
$ / shares
shares
Mar. 31, 2021
$ / shares
shares
Dec. 31, 2021
CAD ($)
$ / shares
shares
Dec. 31, 2021
$ / shares
Dec. 31, 2020
CAD ($)
$ / shares
shares
Dec. 31, 2020
$ / shares
Dec. 31, 2019
CAD ($)
$ / shares
shares
Dec. 31, 2019
$ / shares
Earnings per share [line items]                
Basic - Net earnings | $     $ (18,455)   $ 88,257   $ 152,128  
Basic - Weighted average shares outstanding | shares 89,679,811 89,678,845 89,678,845   89,678,845   89,500,829  
Basic - Per share | (per share) $ 0 $ 0.03 $ (0.21) $ (0.21) $ 0.98 $ 0.98 $ 1.7 $ 1.7
Dilutive effect of stock option conversion - Net earnings | $     $ 0   $ 0   $ 0  
Dilutive effect of stock option conversion - Weighted average shares outstanding | shares     0   0   208,916  
Dilutive effect of stock option conversion - Per share | $ / shares       0   0   0
Diluted - Net earnings | $     $ (18,455)   $ 88,257   $ 152,128  
Diluted - Weighted average shares outstanding | shares 89,679,811 89,762,110 89,678,845   89,678,845   89,709,745  
Diluted - Per share | (per share) $ 0 $ 0.03 $ (0.21) $ (0.21) $ 0.98 $ 0.98 $ 1.7 $ 1.7