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Share-Based Compensation - RSU and PSU Activity (Details) - shares
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Restricted share units    
Number of Restricted Stock Units    
Outstanding at beginning of period (in shares) 1,050,599 651,537
Awarded (in shares) 395,759 453,560
Vested (in shares) (335,826) (164,203)
Forfeited (in shares) (19,523) (12,399)
Outstanding at end of period (in shares) 1,091,009 928,495
Performance Share Units (PSU's)    
Number of Restricted Stock Units    
Outstanding at beginning of period (in shares) 92,319 0
Awarded (in shares) 202,104 92,319
Vested (in shares) 0 0
Forfeited (in shares) 0 0
Outstanding at end of period (in shares) 294,423 92,319