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Risks and Uncertainties (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Mar. 31, 2023
Concentration Risk [Line Items] |  |
Carrying Value | $ 302,810 | $ 385,851
Alternative Investments | Industry Risk |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 302,810 | $ 385,851
Percent of Total | 100.00% | 100.00%
Alternative Investments | Industry Risk | Software and services |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 44,510 | $ 54,944
Percent of Total | 14.70% | 14.20%
Alternative Investments | Industry Risk | Food and staples retailing |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 41,721 | $ 38,210
Percent of Total | 13.80% | 9.90%
Alternative Investments | Industry Risk | Diversified financials |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 30,036 | $ 52,544
Percent of Total | 9.90% | 13.60%
Alternative Investments | Industry Risk | Utilities |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 26,993 | $ 28,043
Percent of Total | 8.90% | 7.30%
Alternative Investments | Industry Risk | Capital goods |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 22,686 | $ 27,707
Percent of Total | 7.50% | 7.20%
Alternative Investments | Industry Risk | Energy |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 21,908 | $ 26,721
Percent of Total | 7.20% | 6.90%
Alternative Investments | Industry Risk | Semiconductors and Semiconductor Equipment |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 20,142 | $ 17,935
Percent of Total | 6.70% | 4.60%
Alternative Investments | Industry Risk | Health care equipment and services |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 17,099 | $ 23,626
Percent of Total | 5.60% | 6.10%
Alternative Investments | Industry Risk | Other |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 77,715 | $ 116,121
Percent of Total | 25.70% | 30.20%
Net Assets, Geographic Area | Geographic Concentration Risk |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 302,810 | $ 385,851
Percent of Total | 100.00% | 100.00%
Net Assets, Geographic Area | Geographic Concentration Risk | North America |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 166,726 | $ 239,951
Percent of Total | 55.10% | 62.20%
Net Assets, Geographic Area | Geographic Concentration Risk | Asia |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 56,176 | $ 62,016
Percent of Total | 18.50% | 16.10%
Net Assets, Geographic Area | Geographic Concentration Risk | South America |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 43,809 | $ 41,423
Percent of Total | 14.50% | 10.70%
Net Assets, Geographic Area | Geographic Concentration Risk | Europe |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 34,980 | $ 38,874
Percent of Total | 11.50% | 10.10%
Net Assets, Geographic Area | Geographic Concentration Risk | Africa |  |
Concentration Risk [Line Items] |  |
Carrying Value | $ 1,119 | $ 3,587
Percent of Total | 0.40% | 0.90%

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