Segment and Geographic Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Net sales are presented in geographic areas
Net Sales	$ 605,461	$ 565,970	$ 1,755,432	$ 1,622,988
United States [Member]
Net sales are presented in geographic areas
Net Sales	522,870	487,777	1,488,520	1,398,020
Canada [Member]
Net sales are presented in geographic areas
Net Sales	65,316	63,717	212,391	181,127
Mexico [Member]
Net sales are presented in geographic areas
Net Sales	$ 17,275	$ 14,476	$ 54,521	$ 43,841