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Share Capital, Option Plans and Share-Based Payments - Schedule of Outstanding Stock Options Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Options    
Outstanding at beginning of period (in shares) 8,354,816 8,750,730
Granted (in shares) 2,278,974 1,475,280
Exercised (in shares) (1,012,644) (936,590)
Forfeited or expired (in shares) (643,316) (934,604)
Outstanding at end of period (in shares) 8,977,830 8,354,816
Exercisable ending balance (in shares) 3,736,180 3,214,376
Weighted- Average Exercise Price    
Outstanding at beginning of period (in dollars per share) $ 21.94 $ 21.13
Granted (in dollars per share) 31.75 24.09
Exercised (in dollars per share) 20.47 15.57
Forfeited or expired (in dollars per share) 22.30 24.17
Outstanding at end of period (in dollars per share) 24.57 21.94
Exercisable at end of period (in dollars per share) $ 19.27 $ 18.02
Weighted- Average Remaining Contractual Term (years)    
Outstanding (in years) 4 years 3 months 7 days 4 years 6 months 23 days
Exercisable (in years) 2 years 8 months 27 days 3 years 4 months 29 days
Aggregate Intrinsic Value ($’000s)    
Outstanding $ 64,707 $ 63,862
Exercisable $ 45,830 $ 37,167