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SHAREHOLDERS' EQUITY AND SHARE-BASED COMPENSATION - Restricted stock awards (Details) - Restricted Shares and Restricted Share Units
12 Months Ended
Dec. 31, 2021
shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]  
Outstanding, beginning of period (in shares) 878,521
Granted (in shares) 368,412
Issued (in shares) (246,382)
Forfeited/canceled (in shares) (374,913)
Outstanding, end of period (in shares) 625,638