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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
 3 Months Ended
Sep. 30, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Options outstanding beginning balance (in shares) 2,147,151
Options granted (in shares) 65,000
Options exercised (in shares) (102,600)
Options forfeited or expired (in shares) (98,375)
Options outstanding ending balance (in shares) 2,011,176
Options exercisable (in shares) 932,551
Options outstanding beginning balance, weighted-average exercise price (in dollars per share) $ 40.07
Options granted, weighted-average exercise price (in dollars per share) $ 54.52
Options exercised, weighted-average exercise price (in dollars per share) $ 32.92
Options forfeited or expired, weighted-average exercise price (in dollars per share) $ 43.95
Options outstanding ending balance, weighted-average exercise price (in dollars per share) $ 40.71
Options exercisable, weighted-average exercise price (in dollars per share) $ 26.26
Options outstanding, weighted-average remaining contractual term 4 years 3 months 22 days
Options exercisable, weighted-average remaining contractual term 2 years 2 months 1 day
Options outstanding, aggregate intrinsic value $ 31,242
Options exercisable, aggregate intrinsic value $ 26,951