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Inventories (Detail) - USD ($)
$ in Thousands
Nov. 30, 2017
Aug. 31, 2017
Inventories [Abstract]    
Raw materials $ 1,739,411 $ 1,574,241
Work in process 919,036 822,628
Finished goods 676,352 591,227
Reserve for excess and obsolete inventory (51,584) (46,013)
Inventories, net $ 3,283,215 $ 2,942,083