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INVENTORIES (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2018
Aug. 31, 2017
Aug. 31, 2016
Inventory Disclosure [Abstract]      
Raw materials $ 177,700 $ 116,800  
Inventory write-downs $ 1,407 $ 21,529 $ 15,555