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v3.25.0.1

Related Party Transactions - CEO Program and Other Transactions with CF&Co (Details) - USD ($) shares in Millions |  |  |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 10, 2024 | May 25, 2023 | Sep. 27, 2019 | Jul. 24, 2018 | Dec. 31, 2024 | Dec. 31, 2023 | Aug. 21, 2024 | Oct. 06, 2023 | Jul. 10, 2020 | Jun. 11, 2020
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  |  | 8.00% |  |
Long-term debt |  |  |  |  | $ 1,141,709,000 | $ 944,326,000 |  |  |  |
Debt instrument, remaining authorized purchase amount |  |  |  |  | $ 49,500,000 |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Purchased senior notes |  |  |  |  |  |  |  |  |  | $ 50,000,000.0
5.375% Senior Notes due 2023 |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Principal amount of debt component |  |  |  | $ 450,000,000.0 |  |  |  |  |  |
Stated interest rate |  |  |  | 5.375% |  |  |  |  |  |
3.750% Senior Notes due 10/1/2024 |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Principal amount of debt component |  |  | $ 300,000,000.0 |  |  |  |  |  |  |
Stated interest rate |  |  | 3.75% |  |  |  |  |  |  |
BGC Partners 4.375% Senior Notes due December 15, 2025 |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Principal amount of debt component |  |  |  |  |  |  |  |  | $ 300,000,000.0 |
Stated interest rate |  |  | 4.375% |  | 4.375% |  |  |  | 4.375% |
Long-term debt |  |  |  |  | $ 11,824,000 | 11,800,000 |  |  |  |
BGC Partners 8.000% Senior Notes due May 25, 2028 |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Principal amount of debt component |  | $ 350,000,000 |  |  |  |  |  |  |  |
Stated interest rate |  | 8.00% |  |  |  |  |  |  |  |
BGC Partners 8.000% Senior Notes due May 25, 2028 |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Principal amount of debt component |  | $ 350,000,000 |  |  |  |  |  |  |  |
Stated interest rate |  | 8.00% |  |  | 8.00% |  | 8.00% |  |  |
Debt instrument, repurchased face amount |  |  |  |  |  |  | $ 500,000 |  |  |
Long-term debt |  |  |  |  | $ 2,257,000 | $ 2,748,000 | $ 500,000 |  |  |
BGC Group 6.600% Senior Notes due June 10, 2029 |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Principal amount of debt component | $ 500,000,000 |  |  |  |  |  |  |  |  |
Stated interest rate | 6.60% |  |  |  |  |  |  |  |  |
Underwriting fees paid | $ 400,000 |  |  |  |  |  |  |  |  |
Related Party |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Issuance of common stock (in shares) |  |  |  |  | 0.0 | 0.0 |  |  |  |
Related party expenses |  |  |  |  | $ 0 | $ 0 |  |  |  |
Related Party | 5.375% Senior Notes due 2023 |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Advisory fees |  |  |  | $ 200,000 |  |  |  |  |  |
Related Party | 5.375% Senior Notes due 2023 | Underwriting fees |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Related party expenses |  |  |  | $ 300,000 |  |  |  |  |  |
Related Party | 3.750% Senior Notes due 10/1/2024 | Underwriting fees |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Related party expenses |  |  | $ 200,000 |  |  |  |  |  |  |
Related Party | BGC Partners 4.375% Senior Notes due December 15, 2025 | Underwriting fees |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Related party expenses |  |  |  |  | 200,000 |  |  |  |  |
Purchased senior notes |  |  |  |  | $ 14,500,000 |  |  |  |  |
Related Party | BGC Partners 8.000% Senior Notes due May 25, 2028 | Underwriting fees |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Related party expenses |  | $ 200,000 |  |  |  |  |  |  |  |

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