Consolidated Income Statements (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	$ 2,876,964	$ 3,015,296	$ 2,666,531
Cost of goods sold	2,584,090	2,713,272	2,392,224
Gross profit	292,874	302,024	274,307
Selling, general and administrative expenses	191,216	188,388	161,326
Impairment charges, including ERP and goodwill	48,772	0	0
Change in fair value of contingent consideration	1,843	120	(128)
Operating income	51,043	113,516	113,109
Interest expense	775	1,639	1,723
Interest income	(2,238)	(2,886)	(1,212)
Other expense (income), net	(520)	3,552	712
Income before income taxes	53,026	111,211	111,886
Provision for income taxes	18,364	36,923	38,363
Net income	$ 34,662	$ 74,288	$ 73,523
Per share data:
Net income per common share, basic (in dollars per share)	$ 1.25	$ 2.72	$ 2.74
Weighted-average shares outstanding, basic (in shares)	27,774	27,362	26,872
Net income per common share, diluted (in dollars per share)	$ 1.24	$ 2.68	$ 2.70
Weighted-average shares outstanding, diluted (in shares)	27,994	27,751	27,246