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Earnings Per Share (Tables)
6 Months Ended
Nov. 30, 2015
Earnings Per Share [Abstract]  
Schedule of weighted average number of shares
The following table sets forth the computation of diluted weighted-average shares outstanding for the three and six months ended November 30, 2015 and November 30, 2014 (in thousands):
 
Three Months Ended
 
Six Months Ended
 
November 30, 2015
 
November 30, 2014
 
November 30, 2015
 
November 30, 2014
 
 
 
 
 
 
 
 
Basic weighted-average shares outstanding
129,505

 
134,754

 
129,919

 
135,528

Plus: Dilutive effect of stock options and other share-based awards
848

 
720

 
833

 
830

Diluted weighted-average shares outstanding
130,353

 
135,474

 
130,752

 
136,358