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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
12 Months Ended
May 31, 2016
Accounting Policies [Abstract]  
Schedule of Weighted Average Number of Shares
The following table sets forth the computation of the diluted weighted-average number of shares outstanding for the years ended May 31, 2016, 2015 and 2014:
 
2016
 
2015
 
2014
 
(in thousands)
Basic weighted-average number of shares outstanding
132,284

 
134,072

 
144,238

Plus: Dilutive effect of stock options and other share-based awards
883

 
850

 
1,138

Diluted weighted-average number of shares outstanding
133,167

 
134,922

 
145,376