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Goodwill and Other Intangibles (Details) - Schedule of activity in goodwill - USD ($)
3 Months Ended 12 Months Ended
Aug. 31, 2016
Aug. 31, 2015
May 31, 2016
Goodwill [Roll Forward]      
Beginning balance $ 116,200,000 $ 116,300,000 $ 116,300,000
Foreign currency translation 100,000 (100,000) (100,000)
Ending balance 116,300,000 116,200,000 116,200,000
Accumulated goodwill impairment $ 39,600,000.0 $ 39,600,000 $ 39,600,000