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Fixed Assets, Net (Tables)
6 Months Ended
Jun. 30, 2023
Property, Plant and Equipment [Abstract]  
Components of Fixed Assets, Net
Fixed assets, net consisted of the following (in thousands):
June 30, 2023December 31, 2022
Computer and communications equipment$100,539 $95,730 
Software, including software development costs340,323 320,275 
Leasehold improvements and other fixed assets95,675 94,875 
536,537 510,880 
Less: accumulated depreciation and amortization(353,913)(327,402)
Fixed assets, net$182,624 $183,478