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Related Party Transactions - BGC Sublease from Newmark (Details) $ in Thousands |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Nov. 30, 2018 shares | May 31, 2020 USD ($) ft² | Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 USD ($) shares | Dec. 31, 2021 USD ($) | May 31, 2021 USD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |
Total revenues |  |  | $ 2,025,401 | $ 1,795,302 | $ 2,015,364 |
LPUs | Newmark |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Aggregate exchangeable limited partnership units purchased (in shares) | shares | 1,500,000 |  |  |  |  |
Class A Common Stock |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Common stock, shares issued (in shares) | shares |  |  | 403,574,835 | 471,933,933 |  |
Class B Common Stock |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Common stock, shares issued (in shares) | shares |  |  | 109,452,953 | 45,884,380 |  |
Newmark | Class A Common Stock |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Limited partnership interests exchange ratio |  |  | 92.31% |  |  |
Related Party | Class B Common Stock | Newmark |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Common stock, shares issued (in shares) | shares | 400,000 |  |  |  |  |
Related Party |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Lessee operating lease sublease term |  | 1 year |  |  |  |
Area of sublease | ft² |  | 21,000 |  |  |  |
Operating lease cost |  | $ 1,100 |  |  |  |
Monthly rent expense |  |  |  |  |  | $ 15
Rent payment under lease term |  |  |  |  | 500 |
Total revenues |  |  | $ 16,000 | $ 14,700 | 14,900 |
Related Party | Lucera |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Total revenues |  |  | $ 0 | $ 0 | $ 200 |

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