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Fixed Assets, Net (Tables)
3 Months Ended
Mar. 31, 2023
Property, Plant and Equipment [Abstract]  
Summary of Components of Fixed Assets, Net
Fixed assets, net consisted of the following (in thousands):
March 31, 2023December 31, 2022
Leasehold improvements, furniture and fixtures, and other fixed assets$225,162 $207,020 
Software, including software development costs50,707 48,112 
Computer and communications equipment32,750 31,586 
Total, cost308,619 286,718 
Accumulated depreciation and amortization(137,705)(131,079)
Total, net$170,914 $155,639