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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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