Accounts Receivable - Trade Accounts And Notes Receivable (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Receivables [Abstract]
Trade receivables	$ 488,002	$ 398,739
Other receivables	76,941	47,328
Allowance for expected credit losses	(3,254)	(2,861)
Other allowances	(3,028)	(2,280)
Trade accounts and notes receivable	$ 558,661	$ 440,926