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Compensation - Grant of Conversion Rights to Newmark Employees (Details) - Limited Partnership Units - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award    
Notional Value $ 512 $ 1,254
Estimated fair value of limited partnership units $ 261 $ 1,135