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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended
Feb. 29, 2024
May 31, 2018
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Number of Shares            
Payments for the purchase of shares to satisfy the employee income tax withholdings         $ 28,100,000 $ 28,100,000
Unrecognized compensation expense     $ 77,500,000   $ 77,500,000  
Unrecognized compensation expense, period for recognition         2 years  
Employee Stock            
Number of Shares            
Stock-based compensation expense     $ 600,000 $ 1,100,000 $ 1,700,000 2,400,000
Maximum percentage of annual salary that an employee is permitted to utilize to purchase stock   10.00%        
Maximum number of shares that a participant can purchase during any single offering period   312        
Maximum fair market value of stock an employee can purchase under the plan per calendar year   $ 25,000        
Exercise price per share of common stock as a percent of fair market value   85.00%        
Shares reserved for future issuance     441,140   441,140  
Number of shares of common stock made available for purchase to employees   750,000        
RSUs            
Number of Shares            
Number of shares of common stock of which unit is convertible (in shares)     1   1  
Vesting period (in years)         3 years  
Qualified retirement eligibility age for grants awarded between 2017 and 2023         55 years  
Qualified retirement eligibility number of years of service for grants awarded between 2017 and 2023         10 years  
Shares purchased to satisfy the employee income tax withholdings (in shares)         95,036  
Payments for the purchase of shares to satisfy the employee income tax withholdings         $ 20,500,000  
Shares vested, prompting share repurchases to cover employees' tax obligations         242,003  
Vested (in shares)         249,133  
RSUs | Minimum            
Number of Shares            
Period of advance notice required in or after 2024 (in months)         6 months  
PSUs            
Number of Shares            
Number of shares of common stock of which unit is convertible (in shares)     1   1  
Vesting period (in years)         3 years  
Shares purchased to satisfy the employee income tax withholdings (in shares)         35,067  
Payments for the purchase of shares to satisfy the employee income tax withholdings         $ 7,600,000  
Vested (in shares)         85,901  
PSUs | Minimum            
Number of Shares            
Risk-free interest rate (in percent) 3.71%          
Expected volatility (in percent) 20.53%          
Correlation with S&P 500 index (0.08)          
Units ultimately expected to be awarded (in percent)         0.00%  
PSUs | Maximum            
Number of Shares            
Risk-free interest rate (in percent) 4.25%          
Expected volatility (in percent) 21.11%          
Correlation with S&P 500 index 0.19          
Units ultimately expected to be awarded (in percent)         200.00%  
Employee            
Number of Shares            
Stock-based compensation expense     $ 11,400,000 9,600,000 $ 35,400,000 30,900,000
Nonemployee            
Number of Shares            
Stock-based compensation expense     $ 500,000 $ 500,000 $ 1,500,000 $ 1,200,000
Nonemployee | RSUs            
Number of Shares            
Vesting period (in years)         1 year