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Compensation - Summary of the BGC Holdings and Newmark Holdings LPUs held by BGC Employees (Detail) - LPUs - shares | Mar. 31, 2023 | Dec. 31, 2022
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Balance outstanding (in shares) | 103,926,000 | 110,348,000
Newmark |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Balance outstanding (in shares) | 9,248,000 | 9,351,000
Regular Units |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Balance outstanding (in shares) | 73,543,000 |
Regular Units | Newmark |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Balance outstanding (in shares) | 7,081,000 |
Preferred Units |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Balance outstanding (in shares) | 30,383,000 |
Preferred Units | Newmark |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Balance outstanding (in shares) | 2,167,000 |

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- Definition Number of equity instruments other than options outstanding, including both vested and non-vested instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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