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Share Capital - Schedule of RSUs and PSUs (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
$ / shares
shares
RSUs/PSUs  
Number of RSUs/PSUs  
Number of RSUs, unvested at beginning of year (in shares) 1,474,395
Number of RSUs, granted (in shares) 3,951,760
Number of RSUs, vested (in shares) (922,299)
Number of RSUs, forfeited and cancelled (in shares) (37,705)
Number of RSUs, unvested at ending of year (in shares) 4,466,151
Weighted average grant date fair value price  
Weighted average grant date fair value price, unvested at beginning of year (in usd per share) | $ / shares $ 30.26
Weighted average grant date fair value price, granted (in usd per share) | $ / shares 55.49
Weighted average grant date fair value price, vested (in usd per share) | $ / shares 22.09
Weighted average grant date fair value price, forfeited and cancelled (in usd per share) | $ / shares 54.88
Number of RSUs, unvested at ending of year (in usd per share) | $ / shares $ 54.06
Aggregate intrinsic value  
Aggregate intrinsic value, unvested at ending of year | $ $ 772,822
PSUs  
Aggregate intrinsic value  
Number of PSUs (in shares) 2,829,677
Total fair value at grant date | $ $ 139,217
PSUs | Award One  
Aggregate intrinsic value  
Number of PSUs (in shares) 2,703,852
Fair value at grant date per PSU (in usd per share) | $ / shares $ 48.16
Total fair value at grant date | $ $ 130,218
PSUs | Award Two  
Aggregate intrinsic value  
Number of PSUs (in shares) 108,113
Fair value at grant date per PSU (in usd per share) | $ / shares $ 69.37
Total fair value at grant date | $ $ 7,500
PSUs | Award Three  
Aggregate intrinsic value  
Number of PSUs (in shares) 17,712
Fair value at grant date per PSU (in usd per share) | $ / shares $ 84.68
Total fair value at grant date | $ $ 1,500