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NET INCOME (LOSS) PER SHARE OF COMMON STOCK - Schedule of Company's Basic and Diluted Net Income Per Share and Weighted Average Shares Outstanding (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Earnings Per Share [Abstract]    
Net income (loss) attributable to Lazard $ 35,755 $ (22,172)
Adjustment for earnings attributable to participating securities (1,279) (1,125)
Net income (loss) attributable to Lazard - basic 34,476 (23,297)
Adjustment for earnings attributable to participating securities 195 0
Net income (loss) attributable to Lazard - diluted $ 34,671 $ (23,297)
Weighted average number of shares of common stock outstanding (in shares) 88,547,757 85,734,443
Shares of common stock issuable on a non-contingent basis (in shares) 2,712,708 1,857,409
Weighted average number of shares of common stock outstanding - basic (in shares) 91,260,465 87,591,852
Weighted average number of incremental shares of common stock issuable from share-based incentive compensation (in shares) 8,091,304 0
Weighted average number of shares of common stock outstanding - diluted (in shares) 99,351,769 87,591,852
Net income (loss) attributable to Lazard per share of common stock:    
Basic (in USD per share) $ 0.38 $ (0.27)
Diluted (in USD per share) $ 0.35 $ (0.27)
Weighted Average    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potentially dilutive shares excluded from calculation (in shares) 2,167,520 6,046,499