CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Net sales	$ 131,674	$ 123,765	$ 265,174	$ 254,568
Cost of sales	95,806	93,746	194,725	196,898
Gross profit	35,868	30,019	70,449	57,670
Selling, general and administrative expenses	19,246	18,970	36,879	37,253
Research and development expenses	2,531	377	3,961	1,122
Operating income	14,091	10,672	29,609	19,295
Other (expense) income:
Interest expense	(1,855)	(1,005)	(2,609)	(2,041)
Interest and other income, net	857	818	1,076	876
Other (expense) income, Total	(998)	(187)	(1,533)	(1,165)
Income before income taxes	13,093	10,485	28,076	18,130
Provision for income taxes	4,823	3,877	10,508	6,694
Net income	$ 8,270	$ 6,608	$ 17,568	$ 11,436
Basic income per common share (in dollars per share)	$ 0.28	$ 0.23	$ 0.60	$ 0.40
Diluted income per common share (in dollars per share)	$ 0.28	$ 0.23	$ 0.60	$ 0.39
Weighted average shares outstanding:
Basic (in shares)	29,115	28,740	29,049	28,679
Diluted (in shares)	29,599	29,204	29,495	29,191