CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Income Statement [Abstract]
Net sales	$ 510,179	$ 499,690	$ 444,388
Cost of sales	395,476	401,419	362,356
Gross profit	114,703	98,271	82,032
Selling, general and administrative expenses	65,209	61,021	55,092
Research and development expenses	5,222	2,834	1,574
Operating income	44,272	34,416	25,366
Other income (expense):
Interest expense	(2,100)	(2,122)	(2,627)
Interest and other income, net	2,502	2,256	2,001
Other income (expense), Total	402	134	(626)
Income before income taxes	44,674	34,550	24,740
Provision for income taxes	15,674	12,222	7,759
Net income	$ 29,000	$ 22,328	$ 16,981
Basic income per common share (in dollars per share)	$ 1.04	$ 0.83	$ 0.64
Diluted income per common share (in dollars per share)	$ 1.02	$ 0.81	$ 0.63
Weighted average shares outstanding:
Basic (in shares)	28,001	27,050	26,587
Diluted (in shares)	28,563	27,450	26,812