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REVENUES - Narrative (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2024
USD ($)
Sep. 30, 2023
Sep. 30, 2024
USD ($)
offering
Sep. 30, 2023
Dec. 31, 2023
USD ($)
Jan. 01, 2023
USD ($)
Disaggregation of Revenue [Line Items]            
Number of primary offerings | offering     2      
Commissions receivable, net $ 22,901,000   $ 22,901,000   $ 19,082,000 $ 15,000,000.0
Contract with customer, liability $ 0   $ 0   $ 0 $ 0
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | The Progressive Corporation            
Disaggregation of Revenue [Line Items]            
Concentration risk (in percent) 11.00% 12.00% 10.00% 11.00%    
Financial Asset, Not Past Due            
Disaggregation of Revenue [Line Items]            
Contract with customer, liability, commissions receivable (in percent) 61.90%   61.90%   73.20%  
Financial Asset, 31 To 60 Days Past Due            
Disaggregation of Revenue [Line Items]            
Contract with customer, liability, commission receivable current (in percent) 6.70%   6.70%   8.80%