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Goodwill and Other Intangible Assets (Details 3) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Acquired Intangible Assets by Major Class [Line Items]    
Weighted Average Amortization Period 9 years  
Gross Carrying Amount $ 553,808 $ 529,572
Accumulated Amortization (269,212) (232,618)
Net Carrying Amount $ 284,596 296,954
Contractual agreements and customer relationships    
Acquired Intangible Assets by Major Class [Line Items]    
Weighted Average Amortization Period 11 years  
Gross Carrying Amount $ 265,148 250,451
Accumulated Amortization (132,691) (113,393)
Net Carrying Amount $ 132,457 137,058
Intellectual property [Member]    
Acquired Intangible Assets by Major Class [Line Items]    
Weighted Average Amortization Period 5 years  
Gross Carrying Amount $ 160,456 151,025
Accumulated Amortization (131,407) (114,219)
Net Carrying Amount 29,049 36,806
Trade names [Member]    
Acquired Intangible Assets by Major Class [Line Items]    
Gross Carrying Amount 5,114 5,006
Accumulated Amortization (5,114) (5,006)
Trade names [Member] | Trade names [Member]    
Acquired Intangible Assets by Major Class [Line Items]    
Gross Carrying Amount 123,090 123,090
Net Carrying Amount $ 123,090 $ 123,090