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Investments - Consolidated Funds Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024
Schedule of Equity Method Investments [Line Items]
Investments of consolidated funds	$ 158,222	$ 131,858
Percentage of Total Investments as of	100.00%	100.00%
Equity Securities
Schedule of Equity Method Investments [Line Items]
Investments of consolidated funds	$ 24,553	$ 17,028
Percentage of Total Investments as of	16.00%	13.00%
Purchases of investments of Consolidated Funds	$ 21,900	$ 15,600
Partnership And LLC Interests
Schedule of Equity Method Investments [Line Items]
Investments of consolidated funds	$ 133,669	$ 114,830
Percentage of Total Investments as of	84.00%	87.00%
Purchases of investments of Consolidated Funds	$ 93,300	$ 76,000

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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