CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Net sales	$ 123,765	$ 116,508	$ 254,568	$ 245,769
Cost of sales	93,746	89,524	196,898	185,051
Gross profit	30,019	26,984	57,670	60,718
Selling, general and administrative expenses	18,970	15,067	37,253	30,831
Research and development expenses	377	1,174	1,122	1,728
Operating income	10,672	10,743	19,295	28,159
Other (expense) income:
Interest expense	(1,005)	(437)	(2,041)	(890)
Interest and other income, net	818	424	876	1,035
Other (expense) income, Total	(187)	(13)	(1,165)	145
Income before income taxes	10,485	10,730	18,130	28,304
Income tax provision	3,877	3,975	6,694	10,214
Net income	$ 6,608	$ 6,755	$ 11,436	$ 18,090
Net income per common share (in dollars per share)	$ 0.23	$ 0.24	$ 0.40	$ 0.65
Diluted net income per common share (in dollars per share)	$ 0.23	$ 0.24	$ 0.39	$ 0.64
Weighted average shares outstanding:
Basic (in shares)	28,740	27,873	28,679	27,790
Diluted (in shares)	29,204	28,467	29,191	28,404