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ORGANIZATION AND BASIS OF PRESENTATION - Additional Information (Details)
1 Months Ended 3 Months Ended
Feb. 23, 2023
USD ($)
Feb. 28, 2021
USD ($)
Mar. 31, 2024
USD ($)
Segment
Jan. 01, 2024
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Organization And Basis Of Presentation [Line Items]            
Conversion ratio       1    
Number of business segments | Segment     2      
Redeemable noncontrolling interests     $ 88,475,000   $ 87,675,000  
LGAC Warrants            
Organization And Basis Of Presentation [Line Items]            
Redemption rights and liquidating distributions relating to LGAC warrants $ 0          
LGAC            
Organization And Basis Of Presentation [Line Items]            
Initial public offering (LGAC)   $ 575,000,000        
Redeemable noncontrolling interests           $ 583,471,000
Assets held-in-trust, noncurrent 585,891,000          
LGAC | Other Revenue            
Organization And Basis Of Presentation [Line Items]            
Losses on dissolution 17,929,000          
LGAC | Non-cash Deferred Underwriting Fees            
Organization And Basis Of Presentation [Line Items]            
Deferred costs $ 20,125,000          
Lazard Group LLC            
Organization And Basis Of Presentation [Line Items]            
Percentage of common membership interests held (as a percent)     100.00%   100.00%