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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Apr. 30, 2015
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]            
Unrecognized compensation expense   $ 0   $ 0    
Shares authorized (in shares) 5,000,000          
Share-based compensation service or vesting period of grant       10 years    
Options to purchase vested (in shares)       1,600,000   1,900,000
Stock options issued in the period (in shares)       0   0
Unrecognized pre-tax non-cash compensation expense   800   $ 800    
Period of recognition of compensation expense       3 months 18 days    
Restricted Stock Units (RSUs)            
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]            
Period of recognition of compensation expense       1 year 10 months 24 days    
Unrecognized compensation expense, restricted stock   20,000 $ 29,300 $ 20,000 $ 29,300  
Granted (in shares)       144,000 207,000  
Vested (in shares)       206,000 183,000  
Performance Shares            
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]            
Share-based compensation service or vesting period of grant       5 years    
Unrecognized pre-tax non-cash compensation expense   1,300 6,800 $ 1,300 $ 6,800  
Period of recognition of compensation expense       10 months 24 days    
Aggregate target payout       $ 7,500    
Immediate vesting of shares       20.00%    
Granted (in shares)       0 76,000  
Vested (in shares)       31,000 18,000  
Vested            
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]            
Fair value of shares vested       $ 22,100 $ 9,700  
General and Administrative Expene            
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]            
Share-based payment arrangement expense   $ 5,000 $ 6,300 $ 16,200 $ 14,800  
Minimum            
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]            
Share-based compensation service or vesting period of grant       2 years    
Maximum            
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]            
Share-based compensation service or vesting period of grant       3 years    
Stock Incentive Plan            
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]            
Plan expiration term       10 years    
Percentage of provision for annual increase in shares 1500.00%          
Provisions of options permitted (in shares)       5,900,000