Condensed Statements of Consolidated Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Net Sales	$ 621,654	$ 605,461	$ 1,821,690	$ 1,755,432
Cost of Sales	447,254	437,848	1,319,838	1,273,646
Gross Profit	174,400	167,613	501,852	481,786
Selling, Distribution and Administrative, including depreciation	130,923	125,594	373,488	363,165
Operating Income	43,477	42,019	128,364	118,621
Interest Expense, net	107	54	147	111
Other (Income) Expense, net	(1,027)	(1,887)	(1,913)	823
Income Before Income Taxes	44,397	43,852	130,130	117,687
Income Tax Expense	15,095	14,434	44,253	40,952
Net Income	$ 29,302	$ 29,418	$ 85,877	$ 76,735
Net Income Per Share - Basic	$ 0.70	$ 0.70	$ 2.04	$ 1.82
Net Income Per Share - Diluted	$ 0.69	$ 0.69	$ 2.02	$ 1.79
Cash dividends per common share	$ 0.23	$ 0.21	$ 0.65	$ 0.59
Weighted average common shares outstanding for basic computation	42,098	42,109	42,038	42,157
Dilutive effect of potential common shares	472	670	479	681
Weighted average common shares outstanding for diluted computation	42,570	42,779	42,517	42,838