CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Income Statement [Abstract]
Net sales	$ 499,690	$ 444,388	$ 412,428
Cost of sales	401,419	362,356	346,590
Gross profit	98,271	82,032	65,838
Selling, general and administrative expenses	63,855	56,666	49,288
Operating income	34,416	25,366	16,550
Other income (expense):
Interest expense	(2,122)	(2,627)	(1,570)
Interest and other income, net	2,256	2,001	1,982
Nonoperating income expense	134	(626)	412
Income before income taxes	34,550	24,740	16,962
Provision for income taxes	12,222	7,759	7,994
Net income (loss)	$ 22,328	$ 16,981	$ 8,968
Basic income per common share	$ 0.83	$ 0.64	$ 0.35
Diluted income per common share	$ 0.81	$ 0.63	$ 0.34
Weighted average shares outstanding:
Basic	27,050	26,587	25,906
Diluted	27,450	26,812	26,098