CONDENSED CONSOLIDATED STATEMENTS OF INCOME - UNAUDITED - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
CONDENSED CONSOLIDATED STATEMENTS OF INCOME - UNAUDITED [Abstract]
Revenue, net	$ 431,326	$ 423,530
Costs and Expenses
Cost of sales	144,809	143,096
Operating and administrative expenses	237,369	250,170
Restructuring and related charges	2,218	10,735
Amortization of intangibles	16,891	14,970
Total Costs and Expenses	401,287	418,971
Operating Income	30,039	4,559
Interest Expense	(4,614)	(6,077)
Foreign Exchange Transaction (Losses) Gains	(82)	2,652
Interest and Other Income	4,391	2,833
Income Before Taxes	29,734	3,967
Provision for Income Taxes	13,400	343
Net Income	$ 16,334	$ 3,624
Earnings Per Share
Basic (in dollars per share)	$ 0.29	$ 0.06
Diluted (in dollars per share)	$ 0.29	$ 0.06
Weighted Average Number of Common Shares Outstanding
Basic (in shares)	55,912	56,536
Diluted (in shares)	56,193	56,905