Condensed Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net Sales	$ 293,834	$ 287,765	$ 911,968	$ 906,619
Cost of Sales	221,929	214,841	665,690	682,134
Gross Profit	71,905	72,924	246,278	224,485
Selling, General and Administrative Expenses	32,253	28,980	96,514	86,538
Multiemployer Pension Settlement and Related Costs	17,639	0	17,639	0
Operating Income	22,013	43,944	132,125	137,947
Other, Net	144	125	437	42
Income Before Income Taxes	22,157	44,069	132,562	137,989
Taxes Based on Income	7,686	15,058	45,735	46,839
Net Income	$ 14,471	$ 29,011	$ 86,827	$ 91,150
Net Income Per Common Share:
Basic (in dollars per share)	$ 0.53	$ 1.06	$ 3.17	$ 3.33
Diluted (in dollars per share)	0.53	1.06	3.16	3.32
Cash Dividends Per Common Share (in dollars per share)	$ 0.55	$ 0.50	$ 1.60	$ 6.46
Weighted Average Common Shares Outstanding:
Basic (in shares)	27,379	27,338	27,369	27,329
Diluted (in shares)	27,442	27,376	27,438	27,365