Condensed Consolidated Statements Of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Condensed Consolidated Statements Of Income [Abstract]
Net sales	$ 190,532	$ 159,760	$ 368,627	$ 308,012
Cost of sales and distribution	158,258	134,966	302,638	261,175
Gross Profit	32,274	24,794	65,989	46,837
Selling and marketing expenses	15,867	14,973	30,351	29,493
General and administrative expenses	7,590	6,624	15,991	12,263
Restructuring charges, net	31	84	113	861
Insurance proceeds	0	(399)	(94)	(399)
Operating Income	8,786	3,512	19,628	4,619
Interest expense	186	166	372	317
Other income	(31)	(25)	(57)	(84)
Income Before Income Taxes	8,631	3,371	19,313	4,386
Income tax expense	3,360	1,421	7,387	1,875
Net Income	$ 5,271	$ 1,950	$ 11,926	$ 2,511
Weighted Average Shares Outstanding
Basic	15,230,584	14,498,269	15,089,995	14,456,938
Diluted	15,581,605	14,677,640	15,479,180	14,626,899
Net earnings per share
Basic	$ 0.35	$ 0.13	$ 0.79	$ 0.17
Diluted	$ 0.34	$ 0.13	$ 0.77	$ 0.17