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Capital Stock and Stock-Based Awards (Details) - Schedule of RSU activity - Restricted Stock Units (RSUs) [Member] - $ / shares
12 Months Ended
May 31, 2016
May 31, 2015
May 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (Shares) 74,536 66,146 67,670
Weighted average grant date price per unit (in Dollars per share) $ 43.10 $ 33.80 $ 30.34