Revenue - Disaggregation of Revenue By Product (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 150,534	$ 67,368	$ 44,902
Management and Advisory Fees
Disaggregation of Revenue [Line Items]
Total revenues	149,424	66,125	42,209
Subscriptions
Disaggregation of Revenue [Line Items]
Total revenues	641	671	788
Consulting Agreements and Referral Fees
Disaggregation of Revenue [Line Items]
Total revenues	150	55	1,479
Other Revenue
Disaggregation of Revenue [Line Items]
Total revenues	$ 319	$ 517	$ 426