v3.26.1
Compensation - Summary of the BGC Holdings and Newmark Holdings LPUs Held by BGC Employees (Details) - LPUs - Newmark Holdings - shares
Mar. 31, 2026
Dec. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Balance outstanding (in shares) 2,082,000 2,140,000
Regular Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Balance outstanding (in shares) 1,391,000  
Preferred Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Balance outstanding (in shares) 691,000