Investments - Schedule of Equity Method Investments (Details) - Equity method investments in Funds - USD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 567,888	$ 453,636
Primary funds
Schedule of Equity Method Investments [Line Items]
Equity method investments	39,972	35,251
Secondary funds
Schedule of Equity Method Investments [Line Items]
Equity method investments	70,601	60,545
Direct investment funds
Schedule of Equity Method Investments [Line Items]
Equity method investments	100,116	94,257
Customized separate accounts
Schedule of Equity Method Investments [Line Items]
Equity method investments	163,090	141,088
Evergreen funds
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 194,109	$ 122,495

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

- 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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