Consolidated Income Statements (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	$ 2,913,634	$ 2,876,964	$ 3,015,296
Cost of goods sold	2,612,535	2,584,090	2,713,272
Gross profit	301,099	292,874	302,024
Selling, general and administrative expenses	192,492	191,216	188,388
Asset Impairment Charges (Legal Recovery)	(15,490)	48,772	0
Change in fair value of contingent consideration	2,311	1,843	120
Operating income	121,786	51,043	113,516
Interest expense	731	775	1,639
Interest income	(2,364)	(2,238)	(2,886)
Other (income) expense, net	312	(520)	3,552
Income before income taxes	123,107	53,026	111,211
Provision for income taxes	41,318	18,364	36,923
Net income	$ 81,789	$ 34,662	$ 74,288
Per share data:
Net income per common share, basic (in dollars per share)	$ 2.89	$ 1.25	$ 2.72
Weighted-average shares outstanding, basic (in shares)	28,337	27,774	27,362
Net income per common share, diluted (in dollars per share)	$ 2.86	$ 1.24	$ 2.68
Weighted-average shares outstanding, diluted (in shares)	28,602	27,994	27,751