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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of outstanding stock maximum 4.50%    
Number of shares available for issuance (in shares) 8,137,941    
Granted (in shares) 0    
Unrecognized compensation compensation, not yet recognized $ 100    
Proceeds from exercise of stock options 8,778 $ 6,545 $ 7,875
Proceeds from stock options exercised, tax benefit $ 1,300    
Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Expiration period 7 years    
Unrecognized compensation compensation, not yet recognized, period 10 months 24 days    
Deferred share units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of automatic redemption 50.00%    
Cash used to settle award $ 2,700 3,100 0
Granted and vested, fair value $ 1,400 10,700 1,900
RSUs and RSU Replacement Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Unrecognized compensation compensation, not yet recognized, period 2 years 10 months 24 days    
Cash used to settle award $ 0 4,600 900
Granted, fair value 7,200 25,400 2,700
Vested, fair value 3,300 14,100 1,600
Unrecognized compensation compensation, not yet recognized $ 2,900    
RSUs and RSU Replacement Units | Alacer      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
PSUs and PSU Replacement Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation compensation, not yet recognized, period 2 years 3 months 18 days    
Cash used to settle award $ 14,300 12,000 4,100
Granted, fair value 11,500 24,800 2,400
Vested, fair value 17,400 $ 4,400 $ 2,000
Unrecognized compensation compensation, not yet recognized $ 4,900    
PSUs and PSU Replacement Units | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance target, percentage 0.00%    
PSUs and PSU Replacement Units | Minimum | Alacer      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance target, percentage 0.00%    
PSUs and PSU Replacement Units | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance target, percentage 200.00%    
PSUs and PSU Replacement Units | Maximum | Alacer      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance target, percentage 200.00%