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CONSOLIDATED VIEs - Additional Information (Details) - USD ($) $ in Thousands |  | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Feb. 23, 2023 | Sep. 30, 2023 | Sep. 30, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Variable Interest Entity [Line Items] |  |  |  |  |
Investments |  |  | $ 688,411 | $ 701,964 |
Investment, Type [Extensible Enumeration] |  |  | Lazard Fund Interests | Lazard Fund Interests |
Redeemable noncontrolling interests |  |  | $ 84,467 | $ 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 |  |  | $ 71,964 | $ 113,174 |

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