Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Consolidated Statements Of Operations [Abstract]
Net sales	$ 726,515	$ 630,437	$ 515,814
Cost of sales and distribution	602,338	527,781	449,339
Gross Profit	124,177	102,656	66,475
Selling and marketing expenses	59,536	57,402	58,271
General and administrative expenses	30,881	27,575	25,329
Restructuring charges, net	(234)	1,433	16,321
Insurance proceeds	(94)	(975)	0
Operating Income (Loss)	34,088	17,221	(33,446)
Interest expense	728	643	527
Other income	(310)	(162)	(685)
Income (Loss) Before Income Taxes	33,670	16,740	(33,288)
Income tax expense (benefit)	13,209	6,982	(12,502)
Net Income (Loss)	$ 20,461	$ 9,758	$ (20,786)
Earnings (loss) per share
Basic	$ 1.34	$ 0.67	$ (1.45)
Diluted	$ 1.31	$ 0.66	$ (1.45)
Cash dividends per share	$ 0.00	$ 0.00	$ 0.09