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Share Capital, Option Plans and Share-Based Payments - Long-Term Incentive Plans (Details)
$ in Millions
3 Months Ended
Sep. 30, 2016
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unvested stock awards compensation cost, weighted average recognition period 2 years 3 months 40 days
Long Term Incentive Plan  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Compensation cost related to unvested awards not yet recognized $ 21.6
Unvested stock awards compensation cost, weighted average recognition period 2 years 4 months