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Share Capital, Option Plans And Share-Based Payments (Summary Of Outstanding Stock Options) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 6 Months Ended
Dec. 31, 2011
years
Share Capital, Option Plans And Share-Based Payments [Abstract]  
Options outstanding beginning balance 2,277,733
Options granted 142,000
Options exercised to date (562,931)
Options forfeited or expired (19,250)
Options outstanding ending balance 1,837,552
Options exercisable 1,333,177
Options outstanding beginning balance, weighted-average exercise price $ 24.51
Options granted, weighted-average exercise price $ 52.16
Options exercised, weighted-average exercise price $ 18.19
Options forfeited or expired, weighted-average exercise price $ 34.25
Options outstanding ending balance, weighted-average exercise price $ 28.48
Options exercisable, weighted-average exercise price $ 22.71
Options outstanding, weighted-average remaining contractual term (years) 3.20
Options exercisable, weighted-average remaining contractual term (years) 2.42
Options exercisable, aggregate intrinsic value $ 42,083
Options exercisable, aggregate intrinsic value $ 37,903