SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Estimated Useful Lives of Property and Equipment (Details)	Dec. 31, 2023
Capitalized software and computer equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	2 years
Capitalized software and computer equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	3 years
Furniture and other equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	5 years
Furniture and other equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	7 years
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	5 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	25 years