Property And Equipment (Components Of Property And Equipment) (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Property, Plant and Equipment [Line Items]
Property and equipment net	$ 148,490	$ 184,367
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment net	44,121	50,308
Computers and other equipment
Property, Plant and Equipment [Line Items]
Property and equipment net	62,712	77,483
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment net	37,772	52,631
Purchased software
Property, Plant and Equipment [Line Items]
Property and equipment net	2,508	2,569
Land and other non-depreciable assets
Property, Plant and Equipment [Line Items]
Property and equipment net	$ 1,377	$ 1,376