XML 70 R53.htm IDEA: XBRL DOCUMENT v3.23.1

Investments - Schedule of Equity Securities and Trading Debt Securities Net Unrealized Investment Gains and Losses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net Realized Or Unrealized Gain Loss On Trading Securities [Abstract]
Net unrealized investment gains (losses)	$ 24,787	$ (40,867)

X

- Definition

Amount of net unrealized gain (loss) on investments in equity securities and trading debt securities.

+ References

No definition available.

+ Details

Name:	laz_NetUnrealizedGainsLossesOnInvestmentsInEquitySecuritiesAndTradingDebtSecurities
Namespace Prefix:	laz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_NetRealizedOrUnrealizedGainLossOnTradingSecuritiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration