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v3.25.3

Investments, at Fair Value - Narrative (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2025 USD ($) underlyingInvestment investmentFund | Jun. 30, 2024 USD ($) | Mar. 31, 2025 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Return of investments in alternative assets held by Customer ExAlt Trusts | $ 3,711,000 | $ 7,248,000 | $ 27,600,000
Income (loss) from equity method investments | $ 11,800,000 |  |
Alternative investment funds | investmentFund | 204 |  |
Underlying investments | underlyingInvestment | 592 |  |
Percent of underlying investments in private companies | 91.00% |  |
Credit-related loss on investment in debt securities available-for-sale | $ 0 | (500,000) |
Equity securities without readily determinable fair value | 26,500,000 |  | 26,500,000
Equity impairment loss | 0 | $ 0 |
Other Public Companies | Class A common stock, par value $0.001 per share |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Fair value of common stock | $ 4,000,000.0 |  | $ 4,100,000

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