PROPERTY AND EQUIPMENT - Schedule of Property and Equipment, net (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 130,349	$ 135,269
Less: accumulated depreciation	(83,070)	(80,213)
Property and equipment, net	47,279	55,056
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	62,787	35,049
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	31,144	27,292
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	6,665	5,993
Computer software purchased
Property, Plant and Equipment [Line Items]
Property and equipment, gross	10,060	9,724
Computer software developed for internal use
Property, Plant and Equipment [Line Items]
Property and equipment, gross	19,470	19,869
Fixed assets in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 223	$ 37,342