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Goodwill and Other Intangibles (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Aug. 31, 2016
Aug. 31, 2015
May 31, 2016
Goodwill and Other Intangibles (Details) [Line Items]      
Amortizable intangible assets acquired $ 0.2 $ 0.5 $ 2.4
Amortization expense $ 0.6 0.5 2.2
Useful life 3 years 6 months    
Finite-Lived Intangible Assets      
Goodwill and Other Intangibles (Details) [Line Items]      
Amortization expense $ 0.6 $ 0.5  
U.S. Based Book Fair Business | Finite-Lived Intangible Assets      
Goodwill and Other Intangibles (Details) [Line Items]      
Amortizable intangible assets acquired $ 0.2   0.5
U.K. Based Book Fair Business | Finite-Lived Intangible Assets      
Goodwill and Other Intangibles (Details) [Line Items]      
Amortizable intangible assets acquired     $ 1.9