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Related Party Transactions - Service Agreements (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Related Party Transaction [Line Items] |  |  |
Total revenues | $ 2,025,401 | $ 1,795,302 | $ 2,015,364
Tower Bridge International Services LP | BGC Partners, Inc. |  |  |
Related Party Transaction [Line Items] |  |  |
Company ownership of Tower Bridge | 52.00% |  |
Tower Bridge International Services LP | Cantor |  |  |
Related Party Transaction [Line Items] |  |  |
Ownership percentage by noncontrolling owners | 48.00% |  |
Related Party |  |  |
Related Party Transaction [Line Items] |  |  |
Mark-up cost of services | 7.50% |  |
Less: Net income (loss) from continuing operations attributable to noncontrolling interest in subsidiaries | $ 2,800 | 700 | 2,500
Total revenues | 16,000 | 14,700 | 14,900
Service charges | 97,400 | 84,900 | 81,900
Compensation to leased employees | $ 64,700 | $ 59,200 | $ 57,900

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