Segment Information (Financial Information By Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Segment Reporting Information [Line Items]
Sales	$ 707,883	$ 613,466	$ 2,260,827	$ 1,931,641
Depreciation and amortization	2,754	1,395	7,594	4,350
Operating income	21,485	25,480	85,200	83,866
Capital expenditures	4,675	4,482	10,187	10,198
North American Distribution [Member]
Segment Reporting Information [Line Items]
Sales	541,049	467,628	1,699,106	1,497,531
Depreciation and amortization	935	1,000	2,977	3,161
Operating income	21,471	20,089	77,501	70,797
Capital expenditures	3,342	4,354	7,670	9,879
International Distribution [Member]
Segment Reporting Information [Line Items]
Sales	178,038	151,419	594,587	452,394
Depreciation and amortization	1,819	395	4,617	1,189
Operating income	14	5,391	7,699	13,069
Capital expenditures	1,333	128	2,517	319
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Sales	$ (11,204)	$ (5,581)	$ (32,866)	$ (18,284)