Property And Equipment (Components Of Property And Equipment) (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Apr. 30, 2018
Property, Plant and Equipment [Line Items]
Property and equipment net	$ 212,092	$ 231,888
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment net	59,943	62,451
Computers and other equipment
Property, Plant and Equipment [Line Items]
Property and equipment net	87,102	91,388
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment net	59,941	69,029
Purchased software
Property, Plant and Equipment [Line Items]
Property and equipment net	3,728	7,642
Land and other non-depreciable assets
Property, Plant and Equipment [Line Items]
Property and equipment net	$ 1,378	$ 1,378