Stock Plans (Schedule Of Stock Option Activity) (Details) (USD $)	1 Months Ended			12 Months Ended
	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2010	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Stock Plans [Abstract]
Beginning outstanding options, Shares				1,936,023	2,314,949	3,469,284
New grants, Shares	72,700	95,500	171,700	90,100	119,500	211,300
Exercised, Shares				(581,686)	(484,426)	(1,353,435)
Canceled/Expired, Shares				(5,034)	(14,000)	(12,200)
Ending outstanding options, Shares				1,439,403	1,936,023	2,314,949
Exercisable at end of period, Shares				1,169,828	1,536,448	1,747,007
Beginning outstanding options, Weighted Average Exercise Price				$ 18.67	$ 17.14	$ 16.36
New grants, Weighted Average Exercise Price				$ 46.08	$ 32.06	$ 17.00
Exercised, Weighted Average Exercise Price				$ 16.07	$ 14.80	$ 15.09
Canceled/Expired, Weighted Average Exercise Price				$ 23.19	$ 14.35	$ 22.12
Ending outstanding options, Weighted Average Exercise Price				$ 21.41	$ 18.67	$ 17.14
Exercisable at end of period, Weighted Average Exercise Price				$ 19.00
Weighted average fair value per share of options granted during the year	$ 20.42	$ 14.51	$ 7.22	$ 20.47	$ 14.60	$ 7.58