PROPERTY, EQUIPMENT AND SOFTWARE, NET - Schedule of Property, Equipment and Software, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total property, equipment and software, gross	$ 466,229	$ 456,777
Less: accumulated depreciation and amortization	(409,498)	(383,196)
Property, equipment and software, net	56,731	73,581
Net carrying amount of internally-developed software	48,600	54,700
Furniture and fixtures and other
Property, Plant and Equipment [Line Items]
Total property, equipment and software, gross	3,384	5,524
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property, equipment and software, gross	18,428	23,576
Computer hardware and purchased software
Property, Plant and Equipment [Line Items]
Total property, equipment and software, gross	110,338	118,659
Internally-developed software
Property, Plant and Equipment [Line Items]
Total property, equipment and software, gross	$ 334,079	$ 309,018