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FAIR VALUE MEASUREMENTS (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Investments in securities:        
Investments in trading securities $ 20,667   $ 32,674  
Total assets measured at fair value 20,908   32,915  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning balance   $ 2,792    
Unrealized gains (losses) on private investments   0    
Ending balance   2,792    
Fair Value Inputs [Abstract] (Deprecated 2018-01-31)        
Long-term Investments 7,247   7,247  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value 7,184 11,841 10,133 $ 12,901
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings $ (2,949) $ (1,060)    
Unobservable input - revenue retention discount rate - maximum true true    
Unobservable input - revenue retention discount rate - weighted average true true    
Unobservable input - revenue retention discount rate - minimum true true    
Unobservable input - revenue retention volatility - weighted average true true    
Unobservable input - revenue retention volatility - maximum true true    
Unobservable input - revenue retention volatility - minimum true true    
Unobservable input - growth discount rate - weighted average true true    
Unobservable input - growth discount rate - maximum true true    
Unobservable input - growth discount rate - minimum true true    
Unobservable input - growth volatility - weighted average true true    
Unobservable input - growth volatility - maximum true true    
Unobservable input - growth volatility - minimum true true    
Asset Acquisition, Consideration Transferred, Contingent Consideration $ 7,200      
Level 1        
Investments in securities:        
Investments in trading securities 20,667   32,674  
Total assets measured at fair value 20,667   32,674  
Level 2        
Investments in securities:        
Investments in trading securities 0   0  
Total assets measured at fair value 0   0  
Level 3        
Investments in securities:        
Investments in trading securities 0   0  
Total assets measured at fair value $ 0   $ 0  
Asset Acquisition, Consideration Transferred, Contingent Consideration Level 3   Level 3  
Other Liabilities, Fair Value Disclosure $ 7,184   $ 10,133  
Investments Measured at NAV        
Investments in securities:        
Investments in trading securities 0   0  
Total assets measured at fair value $ 241   $ 241  
Fair Value, Recurring        
Investments in securities:        
Asset Acquisition, Consideration Transferred, Contingent Consideration Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member]   Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member]  
Private investment fund        
Investments in securities:        
Private $ 241   $ 241  
Private investment fund | Level 1        
Investments in securities:        
Private 0   0  
Private investment fund | Level 2        
Investments in securities:        
Private 0   0  
Private investment fund | Level 3        
Investments in securities:        
Private 0   0  
Private investment fund | Investments Measured at NAV        
Investments in securities:        
Private $ 241   $ 241