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Segment Information Segment Operating Income Reconciliation to Consolidated (Details) - USD ($)
$ in Thousands
3 Months Ended
Nov. 30, 2015
Nov. 30, 2014
Segment Reporting Information [Line Items]    
Operating income (loss) $ (4,028) $ 785
Restructuring charges and other exit-related costs (1,925) (593)
Interest expense (1,859) (2,374)
Other income, net 407 932
Loss from continuing operations before income taxes (5,480) (657)
Operating Segments    
Segment Reporting Information [Line Items]    
Operating income (loss) 4,790 10,937
Operating Segments | Auto and Metals Recycling    
Segment Reporting Information [Line Items]    
Operating income (loss) 2,036 4,730
Operating Segments | Steel Manufacturing Business    
Segment Reporting Information [Line Items]    
Operating income (loss) 2,754 6,207
Segment Reconciling Items    
Segment Reporting Information [Line Items]    
Restructuring charges and other exit-related costs (1,925) (593)
Corporate and eliminations    
Segment Reporting Information [Line Items]    
Operating income (loss) $ (6,893) $ (9,559)