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Revenues - Schedule of Disaggregation of Revenue by Product Offering (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
	Sep. 30, 2021	Sep. 30, 2021		Sep. 30, 2020		Sep. 30, 2021		Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Total carried interest allocations		$ 196,386		$ 166,065		$ 422,748		$ 37,563
Management and advisory fees, net
Disaggregation of Revenue [Line Items]
Revenues		83,583		75,652		161,644		139,152
Focused commingled funds
Disaggregation of Revenue [Line Items]
Revenues		28,500		30,821		52,650		50,674
SMAs
Disaggregation of Revenue [Line Items]
Revenues		42,510		31,229		83,115		61,951
Advisory and other services
Disaggregation of Revenue [Line Items]
Revenues		12,380		13,602		25,635		26,465
Fund reimbursement revenues
Disaggregation of Revenue [Line Items]
Revenues		193		0		244		62
Total incentive fees
Disaggregation of Revenue [Line Items]
Revenues		1,796		1,196		5,978		4,785
SMAs
Disaggregation of Revenue [Line Items]
Revenues		1,793		1,168		5,905		4,757
Focused commingled funds
Disaggregation of Revenue [Line Items]
Revenues		3		28		73		28
Carried interest allocation, SMAs
Disaggregation of Revenue [Line Items]
Total carried interest allocations		129,829		127,227		302,622		21,459
Carried interest allocation, focused comingled funds
Disaggregation of Revenue [Line Items]
Total carried interest allocations		66,557		38,838		120,126		16,104
Legacy Greenspring carried interest allocations
Disaggregation of Revenue [Line Items]
Total carried interest allocations	$ 3,000	0	[1]	0	[1]	0	[1]	0	[1]
Legacy carried interest allocation, SMAs
Disaggregation of Revenue [Line Items]
Total carried interest allocations		0		0		0		0
Legacy carried interest allocation, focused comingled funds
Disaggregation of Revenue [Line Items]
Total carried interest allocations	$ 3,000	$ 0		$ 0		$ 0		$ 0
[1] Reflects the net effect of gross realized gains and the reversal of such amounts in unrealized gains. See notes 3, 5 and 14 for more information.

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