Condensed Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Income Statement [Abstract]
Net sales	$ 231,198	$ 211,917
Cost of sales and distribution	181,025	174,803
Gross Profit	50,173	37,114
Selling and marketing expenses	15,719	15,515
General and administrative expenses	10,731	8,411
Restructuring charges, net	0	3
Operating Income	23,723	13,185
Interest expense	54	164
Other income	(52)	(33)
Income Before Income Taxes	23,721	13,054
Income tax expense	8,563	3,816
Net Income	$ 15,158	$ 9,238
Weighted Average Shares Outstanding
Basic (shares)	16,180,860	15,532,103
Diluted (shares)	16,421,230	15,768,884
Net earnings per share
Basic (usd per share)	$ 0.94	$ 0.59
Diluted (usd per share)	$ 0.92	$ 0.59