Selected Quarterly Financial Data ( Schedule Of Quarterly Financial Information) (Details) (USD $)	3 Months Ended																12 Months Ended
	Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2010		Sep. 30, 2010		Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2010
Net Sales	$ 273,959,000		$ 271,098,000		$ 311,786,000		$ 274,516,000		$ 256,034,000		$ 252,623,000		$ 316,238,000		$ 265,051,000		$ 1,131,359,000	[1]	$ 1,089,946,000	[1]	$ 1,056,608,000	[1]
Gross Margin	61,020,000		53,802,000		69,859,000		55,430,000		53,580,000		52,534,000		78,244,000		58,071,000		240,111,000		242,429,000		270,332,000
Net Income	25,955,000		18,222,000		30,373,000	[2]	21,258,000		29,293,000	[3]	19,441,000		34,863,000	[4]	22,767,000		95,808,000		106,364,000		114,969,000
Diluted Net Income per Share	$ 0.95	[5]	$ 0.67	[5]	$ 1.11	[2],[5]	$ 0.78	[5]	$ 1.07	[3],[5]	$ 0.71	[5]	$ 1.25	[4],[5]	$ 0.81	[5]	$ 3.51	[5]	$ 3.84	[5]	$ 4.07
CDSOA [Member]
CDSOA receipts, net of tax					$ 1,800,000				$ 8,900,000				$ 600,000
CDSOA receipts, per share amount					$ 0.06				$ 0.33				$ 0.02

[1] Net sales and long-lived assets are predominantly domestic.

[2] 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.

[3] Included in the fourth quarter earnings is income of approximately $8.9 million, net of taxes, or approximately $.33 per share, related to additional funds received under CDSOA.

[4] Included in the second quarter earnings is income of approximately $0.6 million, net of taxes, or approximately $.02 per share, related to funds received under CDSOA.

[5] 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.