Selected Quarterly Financial Data (Schedule Of Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2017		Jun. 30, 2016		Jun. 30, 2015
Quarterly Financial Information Disclosure [Abstract]
Net Sales	$ 289,874		$ 293,834		$ 326,773		$ 291,361		$ 284,490		$ 287,765		$ 324,769		$ 294,085		$ 1,201,842		$ 1,191,109		$ 1,104,514
Gross Profit	72,486		71,905		93,739		80,634		75,144		72,924		83,594		67,967		318,764		299,629		257,692
Net Income	$ 28,487		$ 14,471	[1]	$ 38,956		$ 33,400		$ 30,614		$ 29,011		$ 34,511		$ 27,628		$ 115,314	[1]	$ 121,764		$ 101,686
Diluted Net Income Per Common Share (in dollars per share)	$ 1.04	[2]	$ 0.53	[1],[2]	$ 1.42	[2]	$ 1.22	[2]	$ 1.12	[2]	$ 1.06	[2]	$ 1.25	[2]	$ 1.01	[2]	$ 4.20	[1],[2]	$ 4.44	[2]	$ 3.72
After-tax amount included in net income related to a multiemployer pension settlement and other benefit-related costs			$ 11,500
After-tax per share amount included in diluted net income per common share related to a multiemployer pension settlement and other benefit-related costs (in dollars per share)			$ 0.42

[1] Included in the third quarter and fiscal year net income is expense of $11.5 million, net of taxes, or approximately $0.42 per diluted share, related to a multiemployer pension settlement and other benefit-related costs.

[2] Diluted net income per common share amounts are calculated independently for each of the quarters presented. Accordingly, the sum of the quarterly net income per common share amounts may not agree with the fiscal year.