OTHER INCOME AND OTHER EXPENSES (Schedule of Interest Income and Expense of Continuing Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Other Income and Expenses [Abstract]
Interest income	$ 123	$ 2,397	$ 2,011	$ 12,648
Foreign currency gains (losses), net	489	(139)	544	(25)
Other, net	1,755
Other, net		(379)	(2,204)	(1,118)
Other income (expense), net	$ 2,367	$ 1,879	$ 4,759	$ 13,741