Property And Equipment (Components Of Property And Equipment) (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Apr. 30, 2019
Property, Plant and Equipment [Line Items]
Property and equipment net	$ 184,367	$ 212,092
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment net	50,308	59,943
Computers and other equipment
Property, Plant and Equipment [Line Items]
Property and equipment net	77,483	87,102
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment net	52,631	59,941
Purchased software
Property, Plant and Equipment [Line Items]
Property and equipment net	2,569	3,728
Land and other non-depreciable assets
Property, Plant and Equipment [Line Items]
Property and equipment net	$ 1,376	$ 1,378