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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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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.

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