Condensed Consolidated Statements Of Income - 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	$ 319,665	$ 326,773	$ 618,581	$ 618,134
Cost of Sales	235,724	233,034	459,163	443,761
Gross Profit	83,941	93,739	159,418	174,373
Selling, General and Administrative Expenses	36,676	34,381	67,827	64,261
Operating Income	47,265	59,358	91,591	110,112
Other, Net	412	206	770	293
Income Before Income Taxes	47,677	59,564	92,361	110,405
Taxes Based on Income	1,757	20,608	17,055	38,049
Net Income	$ 45,920	$ 38,956	$ 75,306	$ 72,356
Net Income Per Common Share:
Basic (in dollars per share)	$ 1.67	$ 1.42	$ 2.74	$ 2.64
Diluted (in dollars per share)	1.67	1.42	2.74	2.63
Cash Dividends Per Common Share (in dollars per share)	$ 0.60	$ 0.55	$ 1.15	$ 1.05
Weighted Average Common Shares Outstanding:
Basic (in shares)	27,396	27,366	27,396	27,364
Diluted (in shares)	27,460	27,441	27,456	27,435