Segment Information (Financial Information By Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Sales	$ 782,684	$ 683,644	$ 1,552,943	$ 1,318,175
Depreciation and amortization	2,258	1,446	4,840	2,956
Operating income	32,087	33,538	63,715	58,386
Capital expenditures	3,174	3,865	5,513	5,715
North American Distribution [Member]
Segment Reporting Information [Line Items]
Sales	574,475	528,539	1,158,058	1,029,903
Depreciation and amortization	999	1,028	2,042	2,162
Operating income	26,756	29,288	56,030	50,708
Capital expenditures	2,137	3,809	4,328	5,524
International Distribution [Member]
Segment Reporting Information [Line Items]
Sales	219,761	160,769	416,548	300,975
Depreciation and amortization	1,259	418	2,798	794
Operating income	5,331	4,250	7,685	7,678
Capital expenditures	1,037	56	1,185	191
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Sales	$ (11,552)	$ (5,664)	$ (21,663)	$ (12,703)