Revenue - Schedule of Disaggregation of Revenue By Service Line (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Disaggregation of Revenue [Line Items]
Total revenue	$ 337,318	$ 284,288	$ 795,722	$ 668,346
Private Client Services
Disaggregation of Revenue [Line Items]
Total revenue	177,644	154,976	403,273	346,797
Business Services
Disaggregation of Revenue [Line Items]
Total revenue	120,134	93,926	286,161	228,026
Alternative Investment Funds
Disaggregation of Revenue [Line Items]
Total revenue	27,860	26,598	70,765	63,785
Valuation Services
Disaggregation of Revenue [Line Items]
Total revenue	$ 11,680	$ 8,788	$ 35,523	$ 29,738