Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2018	Jul. 31, 2017
Income Statement [Abstract]
Net sales	$ 428,962	$ 276,827
Cost of sales and distribution	333,226	218,469
Gross Profit	95,736	58,358
Selling and marketing expenses	22,938	18,198
General and administrative expenses	29,830	9,527
Restructuring charges, net	2,441	0
Operating Income	40,527	30,633
Interest expense (income), net	9,425	(517)
Other income	(1,437)	(222)
Income Before Income Taxes	32,539	31,372
Income tax expense	7,772	9,091
Net Income	$ 24,767	$ 22,281
Weighted Average Shares Outstanding
Basic (in shares)	17,534,114	16,271,788
Diluted (in shares)	17,618,943	16,355,045
Net earnings per share
Basic (in usd per share)	$ 1.41	$ 1.37
Diluted (in usd per share)	$ 1.41	$ 1.36