Segments - Long Lived Assets, Excluding Financial Instruments and Tax Assets, Classified by Controlling Countries over Ten Percent (Detail) - USD ($) $ in Thousands	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Segment Reporting Information [Line Items]
Total long-lived assets	$ 322,313	$ 304,566	$ 305,906
U.S.
Segment Reporting Information [Line Items]
Total long-lived assets	175,691	186,220	185,228
United Kingdom
Segment Reporting Information [Line Items]
Total long-lived assets	64,280	22,893	26,711
Other countries
Segment Reporting Information [Line Items]
Total long-lived assets	$ 82,342	$ 95,453	$ 93,967