Stock-Based Compensation Stock Option Plans (Details) - USD ($)	12 Months Ended
Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2024
Weighted Average Exercise Price
Exercise of stock options		$ 1,841,000
Stock options
Shares
Outstanding at the beginning of the year (in shares)	0
Options granted (in shares)	0	0	0
Outstanding at the end of the year (in shares)		0
Weighted Average Exercise Price
Exercise of stock options		$ 1,841,000	$ 0
Intrinsic value of options
Intrinsic value of options exercised		7,312,000	$ 0
Intrinsic value of options outstanding	$ 0	$ 0
Restated 2006 Plan \| Stock options
Shares
Outstanding at the beginning of the year (in shares)		66,164	66,164
Options exercised (in shares)		(66,164)
Outstanding at the end of the year (in shares)			66,164
Weighted Average Exercise Price
Outstanding at the beginning of the year (in dollars per share)		$ 27.82	$ 27.82
Options exercised (in dollars per share)		$ 27.82
Outstanding at the end of the year (in dollars per share)			$ 27.82

Amount of cash inflow from exercise of option under share-based payment arrangement.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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