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Share Capital - Summary of the Company's RSUs, PSUs, and DSUs (Details)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
RSUs    
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]    
Units, beginning of year 164,704 0
Granted 142,043 166,963
Paid 0 0
Forfeited (17,567) (2,259)
Units, end of year 289,180 164,704
Units vested, end of year 0 0
PSUs    
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]    
Units, beginning of year 875,739 744,081
Granted 320,256 379,289
Paid (234,966) (198,815)
Forfeited (91,692) (48,816)
Units, end of year 869,337 875,739
Units vested, end of year 0 0
DSUs    
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]    
Units, beginning of year 275,950 306,459
Granted 37,147 44,806
Paid (149,848) (75,315)
Forfeited 0 0
Units, end of year 163,249 275,950
Units vested, end of year 163,249 275,950