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Limited Partnership Interests in BGC Holdings and Newmark Holdings - Narrative (Detail) shares in Millions | 6 Months Ended
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Jun. 30, 2023 installment partnership shares
Related Party Transaction [Line Items] |
Number of operating partnerships | partnership | 2
Number of installments | installment | 4
LPUs |
Related Party Transaction [Line Items] |
Limited partnership interests exchange ratio | 0.9235
Newmark Holdings |
Related Party Transaction [Line Items] |
Calculation of contribution ratio, denominator | 2.2
Limited partnership interest, conversion ratio | 1
Percentage of preferred partnership units awarded | 0.6875%
Percentage of preferred partnership units awarded per calendar year | 2.75%
BGC Holdings |
Related Party Transaction [Line Items] |
Limited partnership interest, conversion ratio | 1
Percentage of preferred partnership units awarded | 0.6875%
Percentage of preferred partnership units awarded per calendar year | 2.75%
Cantor rights to purchase exchangeable units |
Related Party Transaction [Line Items] |
Right to exchange from Class A to Class B common stock (up to) (in shares) | shares | 23.6

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- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)(2)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)(2)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(g)(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 + Details
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