Compensation - Grant of Conversion Rights to Newmark Employees (Details) - Limited Partnership Units - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award
Notional value	$ 7,222	$ 12,836
Estimated fair value of limited partnership units	$ 7,013	$ 12,558

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