Credit Losses - Summary of Activity in Allowance for Credit Losses on Trade Receivables (Detail) - USD ($) $ in Thousands	9 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Credit Loss [Abstract]
Beginning Balance	$ 23,795
Provision for credit losses	11,561	$ 10,958
Write-offs	(7,966)
Recoveries of amounts previously written off	276
Foreign currency translation	1,508
Ending Balance	$ 29,174