v3.25.3

STOCKHOLDERS’ EQUITY AND REDEEMABLE NONCONTROLLING INTERESTS - Schedule of Share Repurchase Authorized by Board of Directors (Details)	9 Months Ended
	Sep. 30, 2025 USD ($)
Equity, Class of Treasury Stock [Line Items]
Expiration	Dec. 31, 2026
July 2024
Equity, Class of Treasury Stock [Line Items]
Repurchase Authorization	$ 200,000,000
Expiration	Dec. 31, 2026

Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

+ Details

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Namespace Prefix:	srt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Expiration date for purchase of share under share repurchase plan, in YYYY-MM-DD format. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

+ Details

Name:	srt_StockRepurchaseProgramExpirationDate
Namespace Prefix:	srt_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- 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

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

- Details

Name:	srt_ShareRepurchaseProgramAxis=laz_ShareRepurchaseProgramDateJuly2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Lazard, Inc. 10-Q