Condensed Statements of Consolidated Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net Sales	$ 667,187	$ 608,123	$ 1,347,888	$ 1,232,971
Cost of Sales	478,827	435,667	967,104	882,185
Gross Profit	188,360	172,456	380,784	350,786
Selling, Distribution and Administrative, including depreciation	141,645	134,600	282,232	269,511
Operating Income	46,715	37,856	98,552	81,275
Interest Expense, net	2,139	2,100	4,305	4,246
Other Income, net	(20)	(11)	(731)	(208)
Income Before Income Taxes	44,596	35,767	94,978	77,237
Income Tax Expense	13,646	11,682	30,307	25,781
Net Income	$ 30,950	$ 24,085	$ 64,671	$ 51,456
Net Income Per Share - Basic	$ 0.80	$ 0.62	$ 1.67	$ 1.32
Net Income Per Share - Diluted	0.79	0.61	1.65	1.31
Cash dividends per common share	$ 0.29	$ 0.28	$ 0.58	$ 0.56
Weighted average common shares outstanding for basic computation	38,716	38,985	38,824	39,015
Dilutive effect of potential common shares	490	386	446	337
Weighted average common shares outstanding for diluted computation	39,206	39,371	39,270	39,352