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Investments, at Fair Value - Alternative Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Mar. 31, 2025
--- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | $ 211,324 | $ 259,113
Unfunded Commitments | 37,022 | 41,644
Private Equity |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 109,837 | 120,008
Unfunded Commitments | 31,313 | 34,252
Venture Capital |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 81,643 | 109,361
Unfunded Commitments | 1,217 | 1,324
Natural Resources |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 12,097 | 12,691
Unfunded Commitments | 2,453 | 2,663
Private Real Estate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 6,567 | 6,454
Unfunded Commitments | 1,663 | 2,777
Hedge Funds |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 3,517 | 3,931
Unfunded Commitments | 0 | 245
Other |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | (2,337) | 6,668
Unfunded Commitments | $ 376 | $ 383

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