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Fair Value Measurements - Narrative (Details) | 3 Months Ended | 6 Months Ended | 21 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2025 USD ($) $ / shares security | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) $ / shares security | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) $ / shares security | Jun. 30, 2025 | Mar. 31, 2025 USD ($) $ / shares | Jun. 30, 2024
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Alternative assets | $ 211,324,000 |  | $ 211,324,000 |  | $ 211,324,000 |  | $ 259,113,000 |
Investment income (loss), net | (3,162,000) | $ 8,541,000 | (15,938,000) | $ 19,569,000 |  |  |  |
Equity securities without readily determinable fair value | $ 26,500,000 |  | $ 26,500,000 |  | $ 26,500,000 |  | $ 26,500,000 |
Number of securities with an upward adjustment | security | 1 |  | 1 |  | 1 |  |  |
Equity securities, cumulative upward adjustment | $ 10,800,000 |  | $ 10,800,000 |  | $ 10,800,000 |  |  |
Equity securities, upward adjustment | 0 | 0 | 0 | 0 |  |  |  |
Loss on impairment of goodwill | $ 0 | $ 298,000 | $ 0 | $ 3,692,000 | $ 2,400,000,000 |  |  |
Long-term growth rate | 3.00% | 3.00% | 3.00% | 3.00% | 3.00% | 3.00% |  | 3.00%
Yorkville | Measurement Input, Share Price |  |  |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Debt instrument, measurement input | $ / shares | 0.95 |  | 0.95 |  | 0.95 |  | 0.31 |
Yorkville | Measurement Input, Exercise Price |  |  |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Debt instrument, measurement input | $ / shares | 2.63 |  | 2.63 |  | 2.63 |  | 2.63 |
Yorkville | Measurement Input, Price Volatility |  |  |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Debt instrument, measurement input | $ / shares | 34.7 |  | 34.7 |  | 34.7 |  | 0.901 |
Yorkville | Measurement Input, Expected Dividend Rate |  |  |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Debt instrument, measurement input | 0.000 |  | 0.000 |  | 0.000 |  | 0 |
Yorkville | Measurement Input, Risk Free Interest Rate |  |  |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Debt instrument, measurement input | 3.4 |  | 3.4 |  | 3.4 |  | 0.0370 |
Minimum |  |  |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Discount rates |  |  |  |  |  |  |  | 28.00%
Minimum | Yorkville | Measurement Input, Expected Term |  |  |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Debt instrument, measurement input | 1.85 |  | 1.85 |  | 1.85 |  | 2.35 |
Maximum |  |  |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Discount rates |  | 29.30% |  | 29.30% |  |  |  |
Maximum | Yorkville | Measurement Input, Expected Term |  |  |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |  |  |
Debt instrument, measurement input | 2.12 |  | 2.12 |  | 2.12 |  | 2.62 |

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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/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 107 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-107 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 103 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-103 Reference 10: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 11: 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 12: 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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