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Share Capital, Option Plans and Share-Based Payments - Schedule of Share-Based Payments (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense $ 8,140 $ 6,533
Stock Options    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense 3,888 3,664
Deferred Stock Units (Directors)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense 511 634
Long Term Incentive Plan | Performance Stock Units (PSUs)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense 881 620
Long Term Incentive Plan | Restricted Stock Units (RSUs)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense 1,602 1,234
Other plans | Restricted Stock Units (RSUs)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense 752 381
Employee Share Purchase Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense $ 506 $ 0