Accounts Receivable - Trade Accounts And Notes Receivable (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Apr. 30, 2021
Receivables [Abstract]
Trade receivables	$ 563,604	$ 488,002
Other receivables	100,263	76,941
Allowance for expected credit losses	(3,345)	(3,254)
Other allowances	(3,644)	(3,028)
Trade accounts and notes receivable	$ 656,878	$ 558,661