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Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2023
Accounting Policies [Abstract]  
Schedule of Revenue by Segment Newmark recognized revenues as follows (in thousands): 
 Three Months Ended March 31,
 20232022
Management services, servicing fees and other$212,292 $233,120 
Leasing and other commissions193,306 198,952 
Investment sales 71,993 152,113 
Commercial mortgage origination, net43,208 94,062 
Revenues$520,799 $678,247