XML 78 R64.htm IDEA: XBRL DOCUMENT v3.22.4

Fair Value Measurements - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value Option Quantitative Disclosures [Line Items]
Transfers into or out of Level 3 in the fair value measurement hierarchy	$ 0	$ 0	$ 0
Unfunded Commitments	5,455,000	$ 5,597,000
EGCP III [Member]
Fair Value Option Quantitative Disclosures [Line Items]
Unfunded Commitments	$ 5,093,000
End of the investment period	Oct. 12, 2016
Remaining obligation date	Oct. 12, 2023

X

- Definition

End of investment funding period for new investments.

+ References

No definition available.

+ Details

Name:	laz_EndOfInvestmentFundingPeriod
Namespace Prefix:	laz_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of fair value transfers into or out of level 3.

+ References

No definition available.

+ Details

Name:	laz_FairValueTransfersIntoOrOutOfLevel3
Namespace Prefix:	laz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Remaining obligation date to make capital contributions to fund follow up investments or to pay fund expenses.

+ References

No definition available.

+ Details

Name:	laz_RemainingCommitmentDate
Namespace Prefix:	laz_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 6A
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=SL6742756-110258

+ Details

Name:	us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_FairValueOptionQuantitativeDisclosuresLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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