Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2018
Income Statement [Abstract]
Net sales	$ 1,650,333	$ 1,645,319	$ 1,250,274
Cost of sales and distribution	1,321,147	1,298,846	994,871
Gross Profit	329,186	346,473	255,403
Selling and marketing expenses	83,608	89,875	77,843
General and administrative expenses	113,334	112,917	69,855
Restructuring charges, net	(18)	1,987	0
Operating Income	132,262	141,694	107,705
Interest expense, net	29,027	35,652	13,054
Other (income) expense, net	2,687	(4,846)	(109)
Income Before Income Taxes	100,548	110,888	94,760
Income tax expense	25,687	27,200	31,619
Net Income	$ 74,861	$ 83,688	$ 63,141
Earnings per share
Basic (usd per share)	$ 4.43	$ 4.84	$ 3.80
Diluted (usd per share)	$ 4.42	$ 4.83	$ 3.77