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Investments - Equity Method Investments and Investments Carried Under Measurement Alternative (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Schedule of Equity Method Investments [Line Items] |  |
Equity method investments | $ 38,383 | $ 32,847
Investments carried under measurement alternative | 192 | 192
Total equity method and investments carried under measurement alternative | $ 38,575 | 33,039
Advanced Markets Holdings |  |
Schedule of Equity Method Investments [Line Items] |  |
Investment ownership percentage amount | 25.00% |
Equity method investments | $ 5,090 | 5,110
China Credit BGC Money Broking Company Limited |  |
Schedule of Equity Method Investments [Line Items] |  |
Investment ownership percentage amount | 33.00% |
Equity method investments | $ 21,104 | 16,784
Freedom International Brokerage |  |
Schedule of Equity Method Investments [Line Items] |  |
Investment ownership percentage amount | 45.00% |
Equity method investments | $ 9,659 | 9,794
Other |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investments | $ 2,530 | $ 1,159

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