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Share Capital, Option Plans And Share-Based Payments (Summary Of Share-Based Compensation Costs) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 1,368,410 2,206,442  
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options $ 12,200 $ 22,200 $ 14,200
Share-based compensation expense 22,047 19,906 15,575
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options $ 1,000 $ 1,800 $ 1,300
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (476,103) (1,043,646)  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 4,375,365 4,273,226 3,610,782
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price $ 42.26 $ 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  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price $ 25.54 $ 21.29  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period (790,168) (500,352)  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price $ 41.25 $ 28.72  
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  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value $ 22,153 $ 52,698  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 1,309,484 912,375  
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, 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, Exercisable, Intrinsic Value $ 13,635 $ 22,624  
Stock Options [Member]      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Share-based compensation expense $ 12,193 7,883 $ 5,751
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 4,375,365    
Performance Stock Units (PSUs) [Member]      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Share-based compensation expense $ 2,287 4,643 6,998
Deferred Stock Units (Directors) [Member]      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Share-based compensation expense 2,038 1,548 985
Restricted Stock [Member]      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Share-based compensation expense 0 0 9
Issued under Long Term Incentive Plan [Member] | Restricted Stock Units [Member]      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Share-based compensation expense 4,574 2,062 1,283
Other Issuance [Member] | Restricted Stock Units [Member]      
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]      
Share-based compensation expense $ 955 $ 470 $ 549