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Share Capital, Option Plans And Share-Based Payments (Summary Of Option Activity) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Options    
Options granted (in shares) 1,368,410 2,206,442
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (476,103) (1,043,646)
Options forfeited or expired (in shares) (790,168) (500,352)
Options outstanding beginning balance (in shares) 4,273,226 3,610,782
Options outstanding ending balance (in shares) 4,375,365 4,273,226
Weighted- Average Exercise Price    
Options outstanding beginning balance, weighted-average exercise price (in dollars per share) $ 36.35 $ 24.72
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price 54.33 46.52
Options exercised, weighted-average exercise price (in dollars per share) 25.54 21.29
Options forfeited or expired, weighted-average exercise price (in dollars per share) 41.25 28.72
Options outstanding ending balance, weighted-average exercise price (in dollars per share) 42.26 36.35
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price $ 32.32 $ 23.14
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 4 years 11 months 16 days 5 years 3 months 29 days
Options exercisable, weighted-average remaining contractual term 3 years 5 months 23 days 3 years 5 months 19 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value $ 22,153 $ 52,698
Options exercisable, aggregate intrinsic value $ 13,635 $ 22,624
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 1,309,484 912,375