Fair Value Measurements - Reconciliation of Other Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Reconciliation Of Other Investments [Roll Forward]
Net gain (loss)	$ 757	$ 4,344
Level 3
Reconciliation Of Other Investments [Roll Forward]
Other investments, beginning balance	14,228	13,818
Contributions	0	0
Distributions	(50)	(164)
Net gain (loss)	(29)	(723)
Other investments, ending balance	14,149	12,931
Private equity funds
Reconciliation Of Other Investments [Roll Forward]
Other investments, ending balance	6,430
Private equity funds | Level 3
Reconciliation Of Other Investments [Roll Forward]
Other investments, beginning balance	6,664	7,024
Contributions	0	0
Distributions	(50)	(164)
Net gain (loss)	(184)	(456)
Other investments, ending balance	6,430	6,404
Direct credit investments
Reconciliation Of Other Investments [Roll Forward]
Other investments, ending balance	785
Direct credit investments | Level 3
Reconciliation Of Other Investments [Roll Forward]
Other investments, beginning balance	790	774
Contributions	0	0
Distributions	0	0
Net gain (loss)	(5)	(1)
Other investments, ending balance	785	773
Direct credit investments | Level 3 | Consolidated Funds
Reconciliation Of Other Investments [Roll Forward]
Other investments, beginning balance	21,163
Contributions	14,056
Distributions	(40)
Net gain (loss)	82
Transfer in	19,364
Other investments, ending balance	54,625
Direct equity investments
Reconciliation Of Other Investments [Roll Forward]
Other investments, ending balance	6,934
Direct equity investments | Level 3
Reconciliation Of Other Investments [Roll Forward]
Other investments, beginning balance	6,774	6,020
Contributions	0	0
Distributions	0	0
Net gain (loss)	160	(266)
Other investments, ending balance	$ 6,934	$ 5,754