Compensation - Compensation Expense Related to Restricted Stock Unit Held by BGC Employees (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Share-Based Payment Arrangement [Abstract] | ||
| RSU amortization | $ 47,037 | $ 39,657 |