GOODWILL AND OTHER INTANGIBLE ASSETS (Changes in the Carrying Amount of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Feb. 28, 2015
Goodwill [Roll Forward]
Balance at August 31, 2014	$ 74,319
Foreign currency translation	(556)
Balance at February 28, 2015	73,763
Americas Recycling
Goodwill [Roll Forward]
Balance at August 31, 2014	7,267
Foreign currency translation	0
Balance at February 28, 2015	7,267
Americas Mills
Goodwill [Roll Forward]
Balance at August 31, 2014	4,970
Foreign currency translation	0
Balance at February 28, 2015	4,970
Americas Fabrication
Goodwill [Roll Forward]
Balance at August 31, 2014	57,144
Foreign currency translation	0
Balance at February 28, 2015	57,144
International Mill
Goodwill [Roll Forward]
Balance at August 31, 2014	2,776
Foreign currency translation	(375)
Balance at February 28, 2015	2,401
International Marketing and Distribution
Goodwill [Roll Forward]
Balance at August 31, 2014	2,162
Foreign currency translation	(181)
Balance at February 28, 2015	$ 1,981