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Subsequent Events (Details) - $ / shares
3 Months Ended
Aug. 31, 2017
Jul. 29, 2017
Jul. 30, 2016
Subsequent Event [Line Items]      
Cash dividend declared per share (in dollars per share)   $ 0.07 $ 0.10
Subsequent Event [Member]      
Subsequent Event [Line Items]      
Cash dividend declared per share (in dollars per share) $ 0.07