Selected Quarterly Financial Data (Schedule Of Quarterly Financial Information) (Details) (USD $)	3 Months Ended																12 Months Ended
	Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2011
Net Sales	$ 269,267,000		$ 279,511,000		$ 326,155,000		$ 290,976,000		$ 273,959,000		$ 271,098,000		$ 311,786,000		$ 274,516,000		$ 1,165,909,000		$ 1,131,359,000		$ 1,089,946,000
Gross Margin	60,912,000		58,824,000		81,656,000		65,717,000		61,020,000		53,802,000		69,859,000		55,430,000		267,109,000		240,111,000		242,429,000
Net Income	25,477,000		21,833,000		35,277,000		26,662,000		25,955,000		18,222,000		30,373,000	[1]	21,258,000		109,249,000		95,808,000		106,364,000
Diluted Net Income per Share	$ 0.93	[2]	$ 0.80	[2]	$ 1.28	[2]	$ 0.98	[2]	$ 0.95	[2]	$ 0.67	[2]	$ 1.11	[1],[2]	$ 0.78	[2]	$ 3.99	[2]	$ 3.51	[2]	$ 3.84
CDSOA [Member]
CDSOA receipts, net of tax													$ 1,800,000
CDSOA receipts, per share amount													$ 0.06

[1] Included in the second quarter earnings is income of approximately $1.8 million, net of taxes, or approximately $.06 per share, related to funds received under CDSOA.

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