XML 137 R89.htm IDEA: XBRL DOCUMENT v3.19.2
Awards and Restricted Stock Units Issued under 2007 Plan and 2014 Omnibus Plan (Detail) - 2007 Plan and 2014 Omnibus Plan - $ / shares
12 Months Ended
May 31, 2019
May 31, 2018
May 31, 2017
Weighted-Average Grant-Date Fair Value      
Beginning Balance $ 26.42    
Shares granted 60.01 $ 55.19 $ 50.99
Shares exercised 26.12    
Ending Balance $ 31.73 $ 26.42  
Shares      
Beginning Balance 702,000    
Shares granted 38,946    
Shares exercised (309,000)    
Ending Balance 432,000 702,000