Segment Information Segment Operating Income Reconciliation to Consolidated (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Nov. 30, 2013	Nov. 30, 2012
Segment Reporting Information [Line Items]
Operating income (loss)	$ (3,625)	$ 1,213
Restructuring charges	(1,812)	(1,593)
Interest expense	(2,702)	(2,017)
Other income, net	176	321
Loss before income taxes	(6,151)	(483)
Metals Recycling Business [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	590	5,654
Restructuring charges	(1,291)	(550)
Auto Parts Business [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	5,609	6,364
Restructuring charges	(61)	(187)
Steel Manufacturing Business [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	1,744	3,404
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	7,943	15,422
Restructuring charges	(1,812)	(1,593)
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	$ (9,756)	$ (12,616)