Comprehensive Income - Schedule of Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Jul. 31, 2025	Apr. 30, 2025	Jul. 31, 2024	Apr. 30, 2024
Accumulated Other Comprehensive Income Loss [Line Items]
Stockholders' equity	$ 1,898,813	$ 1,872,139	$ 1,759,242	$ 1,737,325
Accumulated other comprehensive loss, net
Accumulated Other Comprehensive Income Loss [Line Items]
Stockholders' equity	(87,851)	(86,243)	(104,860)	(107,671)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Stockholders' equity	(95,440)	(93,904)	(113,207)	(116,004)
Deferred compensation and pension plan adjustments, net of tax
Accumulated Other Comprehensive Income Loss [Line Items]
Stockholders' equity	7,590	7,604	8,320	8,370
Marketable securities unrealized (loss) gain, net of tax
Accumulated Other Comprehensive Income Loss [Line Items]
Stockholders' equity	$ (1)	$ 57	$ 27	$ (37)