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INVENTORIES, NET (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Feb. 29, 2016
Feb. 28, 2015
Feb. 29, 2016
Feb. 28, 2015
Aug. 31, 2015
Inventory Disclosure [Abstract]          
Percentage of total net inventories valued at LIFO 56.00%   56.00%   51.00%
Percentage of FIFO Inventory 44.00%   44.00%   38.00%
Raw materials $ 60,300   $ 60,300   $ 61,500
Work in process 40,100   40,100    
Inventory write-downs $ 5,300 $ 4,100 $ 7,949 $ 4,119