Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Finance lease cost:
Amortization of right-of-use assets	$ 22,295	$ 23,769	$ 24,352
Interest on lease liabilities	8,179	11,164	13,316
Operating lease cost	47,778	42,383	42,846
Variable lease cost	17,825	12,914	12,555
Total lease cost	$ 96,077	$ 90,230	$ 93,069