Employee Stock Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Apr. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payments of tax withholdings on restricted stock	$ 18,704	$ 16,625
Shares repurchased during the period, value	$ 28,597	$ 40,113
Treasury Stock, Common
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares repurchased during the period (in shares)	145,770	351,250
Shares repurchased during the period, value	$ 9,900	$ 23,500
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employees stock purchased (in shares)	63,001	70,309
Employees stock purchased, price per share (in usd per share)	$ 66.00	$ 60.43
Shares available for future issuance (in shares)	1,400,000
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	$ 41,500
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding (in shares)	1,913,000		1,770,000
Total unrecognized compensation cost related to non-vested awards	$ 112,200
Expected cost recognized over weighted-average period	2 years 9 months 18 days
Shares repurchased during the period to pay for taxes (in shares)	254,047	252,622
Payments of tax withholdings on restricted stock	$ 18,700	$ 16,600