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Share-based Compensation - Summary of Changes in RSUs and DSUs (Details) - shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Restricted Share Units    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]    
Beginning balance 48,883  
Granted 3,002,213 107,543
Forfeited (43,813) (700)
Exercised (1,350,367) (57,960)
Ending balance 1,656,916 48,883
Deferred Share Units    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]    
Beginning balance 367,924  
Granted 3,265,503 378,080
Forfeited (310,164) (7,617)
Settled   (2,539)
Ending balance 3,323,263 367,924