Compensation - Schedule of Grant of Conversion Rights to Newmark Employees (Details) - Limited Partnership Units - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2026	Dec. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award
Notional Value	$ 512	$ 512
Estimated fair value of limited partnership units	$ 261	$ 261

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details