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Investments, at Fair Value - Alternative Investments (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Mar. 31, 2023
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Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | $ 302,810 | $ 385,851
Unfunded Commitments | 49,429 | 61,135
Venture Capital |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 139,950 | 165,933
Unfunded Commitments | 2,366 | 2,810
Private Equity |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 123,664 | 145,073
Unfunded Commitments | 39,949 | 47,218
Natural Resources |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 20,505 | 27,756
Unfunded Commitments | 3,351 | 5,240
Private Real Estate |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 9,119 | 10,391
Unfunded Commitments | 3,134 | 4,800
Hedge Funds |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 6,135 | 24,935
Unfunded Commitments | 246 | 337
Other |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 3,437 | 11,763
Unfunded Commitments | $ 383 | $ 730

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- Definition Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 35 -Paragraph 54B -Publisher FASB -URI https://asc.fasb.org//1943274/2147482134/820-10-35-54B Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-6A + Details
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- 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. + References No definition available. + Details
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- Definition The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-6A + Details
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