v3.22.0.1
COMPENSATION PLANS - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of common shares available for grant (in shares) 1,400,000    
Share-based compensation expense $ 22,900,000 $ 16,000,000 $ 15,400,000
Income tax benefit 5,800,000 $ 4,100,000 $ 3,900,000
Unrecognized compensation cost $ 26,100,000    
Compensation cost not yet recognized, period for recognition 15 months 21 days    
Granted during the year (in shares) 0 495,000 0
Granted during the year (in USD per share) $ 0 $ 42.87 $ 0
Weighted average remaining contractual term for options outstanding 7 years 1 month 6 days    
Weighted average remaining contractual term for options exercisable 5 years 9 months 18 days    
Proceeds from exercise of common stock options $ 4,950,000 $ 643,000 $ 7,000
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Income tax benefit 6,700,000    
Unrecognized compensation cost $ 3,100,000    
Compensation cost not yet recognized, period for recognition 17 months    
Contractual term 9 years 9 years  
Granted during the year (in shares) 0 495,000 0
Granted during the year (in USD per share)   $ 42.87  
Stock Options | Year One      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage   35.00%  
Stock Options | Year Two      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage   35.00%  
Stock Options | Year Three      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage   30.00%  
Stock Appreciation Rights (SARs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost $ 0    
Vesting period 4 years    
Contractual term 9 years    
Granted during the year (in shares) 0 0 0
Granted during the year (in USD per share) $ 0 $ 0 $ 0
Share price (in USD per share) $ 80.69 $ 68.35 $ 52.43
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost $ 23,000,000    
Compensation cost not yet recognized, period for recognition 15 months 15 days    
Aggregate fair value of restricted stock vested and released (in shares) $ 11,900,000 $ 9,300,000 $ 7,000,000
Minimum | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Minimum | Restricted Stock | Performance Contingent Vesting      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 1 year    
Maximum | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 4 years    
Maximum | Restricted Stock | Time-based Cliff Vesting      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 7 years    
Maximum | Restricted Stock | Performance Contingent Vesting      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 7 years