Condensed Consolidated Statements Of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Income Statement [Abstract]
Net sales	$ 211,917	$ 178,095
Cost of sales and distribution	174,803	144,380
Gross Profit	37,114	33,715
Selling and marketing expenses	15,515	14,484
General and administrative expenses	8,411	8,401
Restructuring charges, net	3	82
Insurance proceeds	0	(94)
Operating Income	13,185	10,842
Interest expense	164	186
Other income	(33)	(26)
Income Before Income Taxes	13,054	10,682
Income tax expense	3,816	4,027
Net Income	$ 9,238	$ 6,655
Weighted Average Shares Outstanding
Basic (shares)	15,532,103	14,949,406
Diluted (shares)	15,768,884	15,373,260
Net earnings per share
Basic (usd per share)	$ 0.59	$ 0.45
Diluted (usd per share)	$ 0.59	$ 0.43