Income Taxes - Reconciliation to Federal Statutory Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Income Tax Disclosure [Abstract]
Federal income taxes at statutory rate	$ 78,538	$ 93,976	$ 76,613
State income taxes, net of federal income tax benefit	19,008	16,847	14,730
Impact of foreign rate differences	(1,672)	1,052	(2,827)
Net change in valuation allowance	954	443	350
Equity-based compensation	(3,024)	(1,942)	(1,659)
Other permanent items	3,704	2,670	2,649
GILTI	39	1,452	1,076
Other	540	14	445
Total provision for income taxes	$ 98,087	$ 114,512	$ 91,377