Other Income and Other Expenses (Schedule Of Interest Income And Expense Of Continuing Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Other Income and Expenses [Abstract]
Interest income	$ 8,026	$ 4,497
Foreign currency gains (losses), net	9	(3)
Other income, net	1,088	48
Other income (expense), net	$ 9,123	$ 4,542