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Goodwill and Other Intangible Assets (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Goodwill [Line Items]    
Beginning balance $ 594,773 $ 462,382
Acquisitions and adjustments 8,186 135,107
Change in foreign currency exchange rates 5,225 (2,716)
Ending balance 608,184 594,773
EMS [Member]    
Goodwill [Line Items]    
Beginning balance 51,179 27,873
Acquisitions and adjustments   23,690
Change in foreign currency exchange rates 1,395 (384)
Ending balance 52,574 51,179
DMS [Member]    
Goodwill [Line Items]    
Beginning balance 543,594 434,509
Acquisitions and adjustments 8,186 111,417
Change in foreign currency exchange rates 3,830 (2,332)
Ending balance $ 555,610 $ 543,594