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Fixed Assets, Net (Tables)
9 Months Ended
Sep. 30, 2024
Property, Plant and Equipment [Abstract]  
Schedule of Components of Fixed Assets, Net
Fixed assets, net consisted of the following (in thousands):
September 30, 2024December 31, 2023
Computer and communications equipment$110,346 $103,621 
Software, including software development costs393,373 360,047 
Leasehold improvements and other fixed assets105,630 99,034 
609,349 562,702 
Less: accumulated depreciation and amortization(421,156)(384,402)
Fixed assets, net$188,193 $178,300