Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Assumptions Used for Options Granted to Acquire Common Shares and Fair Value at the Date of Grant (Details)

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Share-Based Compensation - Assumptions Used for Options Granted to Acquire Common Shares and Fair Value at the Date of Grant (Details) - Omnibus Equity Incentive Plan - $ / shares
3 Months Ended 6 Months Ended
Nov. 30, 2015
Nov. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average expected term (in years) 6 years 8 months 12 days 6 years 8 months 12 days
Weighted average expected volatility 30.22% 30.22%
Weighted average risk-free interest rate 1.75% 1.75%
Expected dividend yield 0.00% 0.00%
Weighted average fair value per option granted $ 4.20 $ 4.20