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Segment Information Segment Operating Income Reconciliation to Consolidated (Details) - USD ($)
$ in Thousands
3 Months Ended
Nov. 30, 2016
Nov. 30, 2015
Segment Reporting Information [Line Items]    
Operating income (loss) $ 587 $ (4,028)
Restructuring charges and other exit-related activities (201) (1,925)
Interest expense (1,741) (1,859)
Other income, net 437 407
Loss from continuing operations before income taxes (717) (5,480)
Operating Segments    
Segment Reporting Information [Line Items]    
Operating income (loss) 9,338 4,790
Operating Segments | Auto and Metals Recycling    
Segment Reporting Information [Line Items]    
Operating income (loss) 12,419 2,036
Operating Segments | Steel Manufacturing Business    
Segment Reporting Information [Line Items]    
Operating income (loss) (3,081) 2,754
Segment Reconciling Items    
Segment Reporting Information [Line Items]    
Restructuring charges and other exit-related activities (201) (1,925)
Corporate and eliminations    
Segment Reporting Information [Line Items]    
Operating income (loss) $ (8,550) $ (6,893)