CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net sales	$ 116,508	$ 113,956	$ 245,769	$ 225,704
Cost of sales	89,524	93,248	185,051	183,491
Gross profit	26,984	20,708	60,718	42,213
Selling, general and administrative expenses	15,067	13,945	30,831	26,932
Research and development expenses	1,174	151	1,728	1,056
Operating income	10,743	6,612	28,159	14,225
Other income (expense):
Interest expense	(437)	(532)	(890)	(1,078)
Interest and other income, net	424	1,018	1,035	1,573
Other income (expense)	(13)	486	145	495
Income before income taxes	10,730	7,098	28,304	14,720
Income tax provision	3,975	2,585	10,214	5,387
Net income	$ 6,755	$ 4,513	$ 18,090	$ 9,333
Net income per common share	$ 0.24	$ 0.17	$ 0.65	$ 0.35
Diluted net income per common share	$ 0.24	$ 0.17	$ 0.64	$ 0.34
Weighted average shares outstanding:
Basic	27,873	26,959	27,790	26,882
Diluted	28,467	27,316	28,404	27,272