Investments - Schedule of Investments Held by Consolidated Funds (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025
Schedule of Equity Method Investments [Line Items]
Investments of Consolidated Funds	$ 715,335	$ 415,011
Investments of consolidated funds, percent of total investments	100.00%	100.00%
Equity securities
Schedule of Equity Method Investments [Line Items]
Investments of Consolidated Funds	$ 6,395	$ 70,178
Investments of consolidated funds, percent of total investments	1.00%	17.00%
Purchases of investments of Consolidated Funds	$ 16,200	$ 60,000
Debt securities
Schedule of Equity Method Investments [Line Items]
Investments of Consolidated Funds	$ 92,096	$ 0
Investments of consolidated funds, percent of total investments	13.00%	0.00%
Purchases of investments of Consolidated Funds	$ 108,600	$ 0
Fund investments
Schedule of Equity Method Investments [Line Items]
Investments of Consolidated Funds	$ 616,844	$ 344,833
Investments of consolidated funds, percent of total investments	86.00%	83.00%
Purchases of investments of Consolidated Funds	$ 488,000	$ 257,000

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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