Selected Quarterly Financial Data (Schedule Of Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2014
Quarterly Financial Information Disclosure [Abstract]
Net Sales	$ 284,490		$ 287,765		$ 324,769		$ 294,085		$ 277,716		$ 263,400		$ 303,411		$ 259,987		$ 1,191,109		$ 1,104,514		$ 1,041,075
Gross Profit	75,144		72,924		83,594		67,967		64,990		56,625		78,653		57,424		299,629		257,692		248,568
Net Income	$ 30,614		$ 29,011		$ 34,511		$ 27,628		$ 25,568		$ 20,403		$ 32,954		$ 22,761		$ 121,764		$ 101,686		$ 74,986
Diluted Net Income Per Common Share (in dollars per share)	$ 1.12	[1]	$ 1.06	[1]	$ 1.25	[1]	$ 1.01	[1]	$ 0.93	[1]	$ 0.75	[1]	$ 1.20	[1]	$ 0.83	[1]	$ 4.44	[1]	$ 3.72	[1]	$ 2.74

[1] 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.