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STOCK-BASED COMPENSATION PLANS (Details) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
STOCK-BASED COMPENSATION PLANS        
Recognized employee stock-based compensation expense $ 9,100,000 $ 7,500,000 $ 6,500,000  
Employee Stock Purchase Plan        
STOCK-BASED COMPENSATION PLANS        
Shares available for grant 640,318      
Weighted-Average Grant Date Fair Value        
Shares available under the plan 3,600,000      
Offering period for the plan (in months) 3 months      
Period of interval between occurrence of purchases (in months) 3 months      
IRS regulated cap for payroll deduction to purchase common stock $ 25,000      
Purchase price expressed as a percentage of fair market value of common stock (as a percent) 90.00%      
Shares issued under ESPP 206,806      
Shares available for purchase under ESPP 640,318      
Minimum | Employee Stock Purchase Plan        
Weighted-Average Grant Date Fair Value        
Eligible service period of employees per week to participate in the plan (in hours) 20 hours      
Eligible service period of employees in a calendar year to participate in the plan (in months) 5 months      
Percentage of employees' eligible earnings as payroll deduction to purchase common stock 1.00%      
Maximum | Employee Stock Purchase Plan        
Weighted-Average Grant Date Fair Value        
Percentage of employees' eligible earnings as payroll deduction to purchase common stock 10.00%      
Restricted Stock Units        
Weighted-Average Grant Date Fair Value        
Weighted-average period to recognize unrecognized compensation cost 1 year 6 months      
Incentive Plan        
STOCK-BASED COMPENSATION PLANS        
Additional shares authorized       5,500,000
Shares available for grant 2,231,197      
Weighted-Average Grant Date Fair Value        
Total fair value RSUs vested (in dollars) $ 6,100,000 $ 4,700,000 $ 9,000,000.0  
Unrecognized compensation cost related to the RSUs $ 11,700,000      
Shares available under the plan 2,900,000      
Incentive Plan | Maximum        
STOCK-BASED COMPENSATION PLANS        
Expiration period (in years) 10 years      
Incentive Plan | Restricted Stock Units        
STOCK-BASED COMPENSATION PLANS        
Percentage of vesting through the fourth anniversary of the grant date 100.00%      
Percentage of vesting upon a termination of employment 100.00%      
RSU        
Non-vested at the beginning of the period (in shares) 3,820,000 4,020,000 6,866,000  
Granted (in shares) 2,295,000 1,527,000 1,112,000  
Vested (in shares) (1,409,000) (1,610,000) (3,680,000)  
Forfeited (in shares) (785,000) (117,000) (278,000)  
Non-vested at the end of the period (in shares) 3,921,000 3,820,000 4,020,000 6,866,000
Weighted-Average Grant Date Fair Value        
Non-vested at the beginning of the period (in dollars per share) $ 4.68 $ 3.20 $ 2.31  
Granted (in dollars per share) 4.61 6.57 6.07  
Vested (in dollars per share) 4.35 2.88 2.46  
Forfeited (in dollars per share) 2.87 3.37 2.51  
Non-vested at the end of the period (in dollars per share) $ 5.10 $ 4.68 $ 3.20 $ 2.31