INVESTMENTS - Investments and Securities Sold, Not Yet Purchased (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Investments	$ 687,507	$ 701,964
Investments, at fair value	687,507	701,964
Debt
Schedule of Investments [Line Items]
Investments	99,254	4,285
Equity
Schedule of Investments [Line Items]
Investments	54,442	54,717
Total funds
Schedule of Investments [Line Items]
Investments	533,811	642,962
Alternative investments
Schedule of Investments [Line Items]
Investments	57,679	61,680
Alternative investments | Lazard Fund Interests
Schedule of Investments [Line Items]
Investments	22,807	27,454
Debt
Schedule of Investments [Line Items]
Investments	145,151	191,325
Debt | Lazard Fund Interests
Schedule of Investments [Line Items]
Investments	128,916	175,449
Equity
Schedule of Investments [Line Items]
Investments	282,782	343,139
Equity | Lazard Fund Interests
Schedule of Investments [Line Items]
Investments	225,225	284,099
Private equity
Schedule of Investments [Line Items]
Investments	$ 48,199	$ 46,818