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Fixed Assets, Net (Tables)
3 Months Ended
Mar. 31, 2022
Property, Plant and Equipment [Abstract]  
Components of Fixed Assets, Net
Fixed assets, net consisted of the following (in thousands):
March 31, 2022December 31, 2021
Computer and communications equipment$96,968 $96,472 
Software, including software development costs288,338 280,540 
Leasehold improvements and other fixed assets105,942 105,362 
491,248 482,374 
Less: accumulated depreciation and amortization(304,792)(292,262)
Fixed assets, net$186,456 $190,112