Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Accumulated depreciation and amortization	$ (102,109)	$ (99,679)
Property and equipment, net	38,220	41,302
Property and equipment, gross
Property, Plant and Equipment [Line Items]
Property and equipment, gross	136,236	136,470
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	25,536	25,195
Website and software development costs
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 88,689	88,948
Website and software development costs | Minimum
Property, Plant and Equipment [Line Items]
Useful Lives (Years)	3 years
Website and software development costs | Maximum
Property, Plant and Equipment [Line Items]
Useful Lives (Years)	5 years
Computer and office equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 13,875	14,032
Computer and office equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful Lives (Years)	3 years
Computer and office equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful Lives (Years)	5 years
Software
Property, Plant and Equipment [Line Items]
Useful Lives (Years)	3 years
Property and equipment, gross	$ 1,607	1,607
Furniture
Property, Plant and Equipment [Line Items]
Useful Lives (Years)	7 years
Property and equipment, gross	$ 6,529	6,688
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 4,093	$ 4,511