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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, 2013
Jun. 30, 2012
Options    
Options outstanding beginning balance (in shares) 2,147,151 2,277,733
Options granted (in shares) 430,045 944,500
Options exercised (in shares) (627,305) (1,022,556)
Options forfeited or expired (in shares) (144,500) (52,526)
Options outstanding ending balance (in shares) 1,805,391 2,147,151
Options exercisable (in shares) 672,846 960,151
Weighted- Average Exercise Price    
Options outstanding beginning balance, weighted-average exercise price (in dollars per share) $ 40.07 $ 24.51
Options granted, weighted-average exercise price (in dollars per share) $ 56.29 $ 54.84
Options exercised, weighted-average exercise price (in dollars per share) $ 22.64 $ 18.79
Options forfeited or expired, weighted-average exercise price (in dollars per share) $ 46.94 $ 45.05
Options outstanding ending balance, weighted-average exercise price (in dollars per share) $ 49.44 $ 40.07
Options exercisable, weighted-average exercise price (in dollars per share) $ 39.97 $ 25.92
Options outstanding, weighted-average remaining contractual term 4 years 11 months 16 days 4 years 4 months 2 days
Options exercisable, weighted-average remaining contractual term 3 years 5 months 9 days 2 years 3 months 29 days
Options outstanding, aggregate intrinsic value $ 34,355 $ 26,541
Options exercisable, aggregate intrinsic value $ 19,174 $ 23,093