Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Income Statement [Abstract]
Net sales	$ 427,365	$ 428,962
Cost of sales and distribution	332,846	333,226
Gross Profit	94,519	95,736
Selling and marketing expenses	20,687	22,938
General and administrative expenses	29,432	29,830
Restructuring charges, net	(19)	2,441
Operating Income	44,419	40,527
Interest expense, net	8,088	9,425
Other income, net	(7)	(1,437)
Income Before Income Taxes	36,338	32,539
Income tax expense	9,457	7,772
Net Income	$ 26,881	$ 24,767
Weighted Average Shares Outstanding
Basic (in shares)	16,864,870	17,534,114
Diluted (in shares)	16,907,463	17,618,943
Net earnings per share
Basic (in usd per share)	$ 1.59	$ 1.41
Diluted (in usd per share)	$ 1.59	$ 1.41