CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Net sales	$ 558,524	$ 546,951	$ 510,179
Cost of sales	415,739	411,517	395,476
Gross profit	142,785	135,434	114,703
Selling, general and administrative expenses	76,820	73,159	65,209
Research and development expenses	7,937	5,942	5,222
Operating income	58,028	56,333	44,272
Other (expense) income:
Interest expense	(6,997)	(3,954)	(2,100)
Interest and other income, net	2,823	1,486	2,502
Other (expense) income, Total	(4,174)	(2,468)	402
Income before income taxes	53,854	53,865	44,674
Provision for income taxes	19,088	20,382	15,674
Net income	$ 34,766	$ 33,483	$ 29,000
Basic income per common share (in dollars per share)	$ 1.19	$ 1.17	$ 1.04
Diluted income per common share (in dollars per share)	$ 1.18	$ 1.14	$ 1.02
Weighted average shares outstanding:
Basic (in shares)	29,110	28,731	28,001
Diluted (in shares)	29,581	29,247	28,563