FINANCIAL STATEMENT DETAILS - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Capitalized software, leasehold improvements and equipment	$ 324,884	$ 298,428
Accumulated depreciation and amortization	(215,357)	(145,869)
Capitalized software, leasehold improvements and equipment, net	109,527	152,559
Capitalized software and computer equipment
Property, Plant and Equipment [Line Items]
Capitalized software, leasehold improvements and equipment	275,377	247,176
Leasehold improvements
Property, Plant and Equipment [Line Items]
Capitalized software, leasehold improvements and equipment	27,140	27,780
Furniture and other equipment
Property, Plant and Equipment [Line Items]
Capitalized software, leasehold improvements and equipment	10,387	10,819
Projects in progress
Property, Plant and Equipment [Line Items]
Capitalized software, leasehold improvements and equipment	$ 11,980	$ 12,653