Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Net revenue	$ 139,073	$ 117,968
Costs of revenue	40,394	33,807
Gross profit	98,679	84,161
Share-based compensation recorded within Compensation and benefits	25,915	31,313
Professional services	5,695	3,870
Technology	14,811	13,118
Occupancy	917	1,094
Depreciation and amortization	5,331	3,537
Marketing and advertising	469	378
Other operating expenses	3,944	3,905
Executive chairman long-term performance award		13,121
Loss from operations	(18,538)	(49,852)
Income tax expense	235	134
Net loss	(8,260)	(36,060)
Reportable Segment
Segment Reporting Information [Line Items]
Net revenue	139,073	117,968
Costs of revenue	40,394	33,807
Gross profit	98,679	84,161
Employee compensation and benefits	60,135	63,677
Share-based compensation recorded within Compensation and benefits	25,915	31,313
Professional services	5,695	3,870
Technology	14,811	13,118
Occupancy	917	1,094
Depreciation and amortization	5,331	3,537
Marketing and advertising	469	378
Other operating expenses	3,944	3,905
Executive chairman long-term performance award	0	13,121
Loss from operations	(18,538)	(49,852)
Interest income	10,487	14,170
Other income (expense)	26	(244)
Income tax expense	235	134
Net loss	$ (8,260)	$ (36,060)