XML 68 R51.htm IDEA: XBRL DOCUMENT v3.23.1

Investments - Company's Investments and Securities Sold, Not Yet Purchased (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule of Investments [Line Items]
Investments	$ 741,868	$ 698,977
Alternative Investment Funds [Member]
Schedule of Investments [Line Items]
Investments	70,233	56,947
Alternative Investment Funds [Member] | Lazard Fund Interests [Member] | Lazard Group LLC [Member]
Schedule of Investments [Line Items]
Investments	27,038	24,137
Debt Funds [Member]
Schedule of Investments [Line Items]
Investments	205,701	178,556
Debt Funds [Member] | Lazard Fund Interests [Member] | Lazard Group LLC [Member]
Schedule of Investments [Line Items]
Investments	176,210	142,632
Equity Funds [Member]
Schedule of Investments [Line Items]
Investments	358,202	350,282
Equity Funds [Member] | Lazard Fund Interests [Member] | Lazard Group LLC [Member]
Schedule of Investments [Line Items]
Investments	$ 294,278	$ 266,528

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all investments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(h))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

+ Details

Name:	us-gaap_Investments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_InvestmentTypeAxis=laz_AlternativeInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=laz_LazardFundInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=laz_LazardGroupLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_FixedIncomeFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_EquityFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: