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Fixed Assets, Net (Tables)
9 Months Ended
Sep. 30, 2025
Property, Plant and Equipment [Abstract]  
Schedule of Components of Fixed Assets, Net
Fixed assets, net consisted of the following (in thousands):
September 30, 2025December 31, 2024
Leasehold improvements, furniture and fixtures, and other fixed assets$263,869 $254,337 
Software, including software development costs72,788 64,680 
Computer and communications equipment43,246 41,144 
Total, cost379,903 360,161 
Accumulated depreciation and amortization(222,826)(193,432)
Total, net$157,077 $166,729