XML 144 R121.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Regulatory Authorities - Additional Information (Details) $ in Thousands | Dec. 31, 2024 USD ($)
--- | ---
LFNY |
Regulatory Requirements [Line Items] |
Minimum net capital requirement as defined under exchange act | $ 5
Regulatory capital | 145,582
Regulatory capital in excess of minimum requirement | $ 138,248
Aggregate indebtedness to net capital ratio | 0.76
U.K. Subsidiaries |
Regulatory Requirements [Line Items] |
Regulatory capital | $ 121,483
Regulatory capital in excess of minimum requirement | 50,770
CFLF |
Regulatory Requirements [Line Items] |
Regulatory capital | 146,131
Regulatory capital in excess of minimum requirement | 61,858
Combined European Regulated Group |
Regulatory Requirements [Line Items] |
Regulatory capital | 167,784
Regulatory capital in excess of minimum requirement | 73,786
Other U.S. and Non-U.S. Subsidiaries |
Regulatory Requirements [Line Items] |
Regulatory capital | 99,765
Regulatory capital in excess of minimum requirement | $ 77,593

X
- Definition Regulatory requirements. + References No definition available. + Details
Name: | laz_RegulatoryRequirementsLineItems
Namespace Prefix: | laz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum amount of net capital required to be maintained by broker-dealer and its subsidiary, calculated under Aggregate Indebtedness Standard. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Rule 15c3-1 -Number 240 -Section 15c3-1 -Publisher SEC + Details
Name: | srt_MinimumNetCapitalRequired1
Namespace Prefix: | srt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of total capital as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1 + Details
Name: | us-gaap_Capital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of total risk-based capital exceeding minimum required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1 + Details
Name: | us-gaap_ExcessCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Indebtedness divided by net capital. + References No definition available. + Details
Name: | us-gaap_RatioOfIndebtednessToNetCapital1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=laz_LazardFreresAndCompanyLimitedLiabilityCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=laz_UnitedKingdomSubsidiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=laz_CompagnieFinanciereLazardFreresSasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=laz_CombinedEuropeanRegulatedGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=laz_OtherUSAndNonUSSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |