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Amount of income (loss) for proportionate share of equity method investee's income (loss), net of tax.

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Cash outflow related to additional contribution for the acquisition or continued holding of limited partnership interests held for investment purposes.

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No definition available.

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Represents the number of periods contributions will be made.

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No definition available.

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The amount of tax expense (benefit) on income (loss) from equity method investments.

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No definition available.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Cash outflow related to the acquisition or continued holding of limited partnership interests held for investment purposes.

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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.

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Equity Method Investments - Investment in Limited Partnership Fund (Details) - USD ($)	1 Months Ended			12 Months Ended
	May 31, 2026	Mar. 31, 2022	Jul. 31, 2019	Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2022	Apr. 30, 2021
Equity Method Investments
Equity method investment gain (loss), net of tax				$ 17,441,000	$ 4,837,000	$ (1,674,000)
Limited Partnership Fund
Equity Method Investments
Capital contributions				528,000			$ 10,000,000	$ 10,000,000
Contribution commitments							$ 0
Limited Partnership Fund \| Equity method investment loss, net of tax
Equity Method Investments
Equity method investment gain (loss), net of tax				17,441,000	4,816,000	(1,782,000)
Income tax expense from equity method investments				0	0	0
Limited Partnership Fund \| Long term investments
Equity Method Investments
Carrying value of equity method investments				51,880,000	30,423,000
Limited Partnership Fund, Technologies and Start-Up
Equity Method Investments
Capital contributions		$ 20,000,000		$ 4,543,000	$ 5,674,000	$ 3,074,000
Expected years contributions will be made		5 years	2 years
Additional capital contributions			$ 931,000
Limited Partnership Fund, Technologies and Start-Up \| Subsequent Event
Equity Method Investments
Capital contributions	$ 20,000,000
Expected years contributions will be made	5 years