Share Capital, Option Plans And Share-Based Payments (Summary Of Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options outstanding beginning balance (in shares)	2,277,733	2,669,142
Options granted (in shares)	944,500	78,800
Options exercised (in shares)	(1,022,556)	(439,071)
Options forfeited or expired (in shares)	(52,526)	(31,138)
Options outstanding ending balance (in shares)	2,147,151	2,277,733
Options exercisable (in shares)	960,151	1,701,308
Options outstanding beginning balance, weighted-average exercise price (in dollars per share)	$ 24.51	$ 23.55
Options granted, weighted-average exercise price (in dollars per share)	$ 54.84	$ 51.24
Options exercised, weighted-average exercise price (in dollars per share)	$ 18.79	$ 22.98
Options forfeited or expired, weighted-average exercise price (in dollars per share)	$ 45.05	$ 31.75
Options outstanding ending balance, weighted-average exercise price (in dollars per share)	$ 40.07	$ 24.51
Options exercisable, weighted-average exercise price (in dollars per share)	$ 25.92	$ 19.80
Options outstanding, weighted-average remaining contractual term	4 years 4 months 2 days	2 years 9 months
Options exercisable, weighted-average remaining contractual term	2 years 3 months 29 days	2 years 0 months 22 days
Options outstanding, aggregate intrinsic value	$ 26,541	$ 89,998
Options exercisable, aggregate intrinsic value	$ 23,093	$ 75,234