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PROPERTY AND EQUIPMENT, NET (Tables)
3 Months Ended
Mar. 31, 2022
Property, Plant and Equipment [Abstract]  
Property and Equipment, Net The following is a summary of property and equipment, less accumulated depreciation and amortization (in thousands):    
  March 31, 2022December 31, 2021
Leasehold improvements$215,870 $208,228 
Computer equipment192,964 174,004 
Capitalized software132,215 116,827 
Office furniture and equipment44,134 42,393 
Total585,183 541,452 
Less: Accumulated depreciation and amortization(282,936)(259,312)
Property and equipment, net$302,247 $282,140