Employee Stock Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Jul. 31, 2026	Jul. 31, 2025	Apr. 30, 2026
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payments of tax withholdings on restricted stock	$ 24,912	$ 18,704
Shares repurchased during the period, value	$ 24,912	$ 28,597
Treasury Stock, Common
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares repurchased during the period (in shares)	0	145,770
Shares repurchased during the period, value		$ 9,900
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employees stock purchased (in shares)	67,843	63,001
Employees stock purchased, price per share (in usd per share)	$ 59.92	$ 66.00
Shares available for future issuance (in shares)	1,300,000
Market Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding (in shares)	800,000
Total unrecognized compensation cost related to non-vested awards	$ 47,400
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding (in shares)	1,951,000		1,884,000
Total unrecognized compensation cost related to non-vested awards	$ 126,000
Expected cost recognized over weighted-average period	2 years 9 months 18 days
Shares repurchased during the period to pay for taxes (in shares)	330,514	254,047
Payments of tax withholdings on restricted stock	$ 24,900	$ 18,700

Purchase price paid by employees for common stock through an employee stock purchase plan.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.

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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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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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