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Share Capital, Option Plans and Share-Based Payments - Schedule of Outstanding Stock Options Activity (Details)
$ / shares in Units, $ in Thousands
 9 Months Ended
Mar. 31, 2018
USD ($)
$ / shares
shares
Options  
Outstanding at beginning of period (in shares) | shares 8,977,830
Granted (in shares) | shares 848,830
Exercised (in shares) | shares (2,683,814)
Forfeited or expired (in shares) | shares (296,166)
Outstanding at end of period (in shares) | shares 6,846,680
Exercisable ending balance (in shares) | shares 2,303,668
Weighted- Average Exercise Price  
Outstanding at beginning of period (in dollars per share) | $ / shares $ 24.57
Granted (in dollars per share) | $ / shares 34.55
Exercised (in dollars per share) | $ / shares 18.68
Forfeited or expired (in dollars per share) | $ / shares 30.48
Outstanding at end of period (in dollars per share) | $ / shares 27.86
Exercisable at end of period (in dollars per share) | $ / shares $ 23.91
Weighted- Average Remaining Contractual Term (years)  
Outstanding (in years) 4 years 5 months 24 days
Exercisable (in years) 3 years 2 months 19 days
Aggregate Intrinsic Value ($’000s)  
Outstanding | $ $ 47,591
Exercisable | $ $ 25,095