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CONSOLIDATED VIEs - Additional Information (Details) - USD ($)
$ in Thousands
6 Months Ended
Feb. 23, 2023
Jun. 30, 2023
Jun. 30, 2024
Dec. 31, 2023
Dec. 31, 2022
Variable Interest Entity [Line Items]          
Investments     $ 687,507 $ 701,964  
Investment, Type [Extensible Enumeration]     Lazard Fund Interests Lazard Fund Interests  
Redeemable noncontrolling interests     $ 80,931 $ 87,675  
LGAC          
Variable Interest Entity [Line Items]          
Redeemable noncontrolling interests         $ 583,471
Assets held-in-trust, noncurrent $ 585,891        
LGAC | Non-cash Deferred Underwriting Fees          
Variable Interest Entity [Line Items]          
Deferred costs   $ 20,125      
LGAC | Other Revenue          
Variable Interest Entity [Line Items]          
Losses on dissolution   $ 17,929      
Lazard Group LLC          
Variable Interest Entity [Line Items]          
Investments     $ 73,053 $ 113,174