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Incentive Plans - Schedule of LFI and Other Similar Deferred Compensation Arrangements (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
USD ($)
Prepaid Compensation Asset  
Prepaid compensation asset, beginning balance $ 115,972
Prepaid compensation asset, granted 40,227
Prepaid compensation asset, settled 0
Prepaid compensation asset, amortization and the impact of forfeitures (104,056)
Prepaid compensation asset, change in fair value of underlying investments 0
Prepaid compensation asset, other (88)
Prepaid compensation asset, ending balance $ 52,055
Lazard Fund Interest and Similar Deferred Compensation Arrangements  
Deferred Compensation Arrangement With Individual Excluding Share Based Payments And Postretirement Benefits [Line Items]  
Unrecognized compensation expense, period 1 year 2 months 12 days
LFI and other similar deferred compensation arrangements  
Compensation Liability  
Derivative liability, beginning balance $ 365,420
Derivative liability, granted 40,227
Derivative liability, settled (143,718)
Derivative liability, amortization and the impact of forfeitures (3,647)
Derivative liability, change in fair value of underlying investments 16,176
Derivative liability, other (3,611)
Derivative liability, ending balance $ 270,847