Condensed Consolidated Income Statements (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Net sales	$ 870,829	$ 791,720
Cost of goods sold	783,277	714,075
Gross profit	87,552	77,645
Selling, general and administrative expenses	61,547	48,155
Change in fair value of contingent consideration	1,564	513
Operating income	24,441	28,977
Interest expense	281	190
Interest income	(942)	(835)
Other (income) expense, net	680	386
Income before income taxes	24,422	29,236
Provision for income taxes	8,426	10,028
Net income	$ 15,996	$ 19,208
Per share data:
Net income per common share, basic (in dollars per share)	$ 0.58	$ 0.67
Weighted-average shares outstanding, basic (in shares)	27,702	28,544
Net income per common share, diluted (in dollars per share)	$ 0.57	$ 0.67
Weighted-average shares outstanding, diluted (in shares)	27,929	28,794