OTHER INCOME AND OTHER EXPENSES (Schedule of Interest Income and Expense of Continuing Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Other Income and Expenses [Abstract]
Interest income	$ 729	$ 2,225	$ 1,888	$ 10,251
Foreign currency gains (losses), net	(337)	105	55	114
Other, net	(1,211)
Other, net		409	449	1,497
Other income (expense), net	$ (819)	$ 2,739	$ 2,392	$ 11,862