Income Taxes - Reconciliation to Federal Statutory Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Income Tax Disclosure [Abstract]
Federal income taxes at statutory rate	$ 76,613	$ 28,793	$ 9,747
State income taxes, net of federal income tax benefit	14,730	4,000	4,054
Impact of foreign rate differences	(2,827)	(1,055)	(2,861)
Impact of rate difference on impairment of goodwill	0	0	7,630
Net change in valuation allowance	350	578	9,070
Equity-based compensation	(1,659)	(1,012)	(1,196)
GILTI	1,076	1,911	704
Financing structure	0	(2,315)	(5,361)
Other	3,094	634	1,157
Total provision for income taxes	$ 91,377	$ 31,534	$ 22,944