Goodwill and Other Intangible Assets, net (Details) - USD ($)				3 Months Ended			12 Months Ended
	Feb. 01, 2016	Feb. 01, 2015	Jul. 01, 2014	Aug. 31, 2016	Feb. 29, 2016	Feb. 28, 2015	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2016	Jul. 01, 2016	Feb. 01, 2016	Aug. 31, 2015	Jul. 01, 2015	Feb. 01, 2015	Jul. 01, 2014
Goodwill [Line Items]
Goodwill				$ 166,847,000			$ 175,676,000	$ 175,676,000		$ 166,847,000	$ 167,000,000		$ 175,676,000
Goodwill impairment charge					$ 9,000,000	$ 141,000,000	8,845,000	141,021,000	$ 0
Goodwill, Impaired, Accumulated Impairment Loss										471,000,000			462,000,000
Goodwill [Roll Forward]
Goodwill, beginning of period							175,676,000
Goodwill impairment charge					$ (9,000,000)	$ (141,000,000)	(8,845,000)	(141,021,000)	0
Goodwill, end of period				166,847,000			166,847,000	175,676,000
Auto Parts Business
Goodwill [Line Items]
Goodwill		$ 176,000,000													$ 176,000,000
Goodwill [Roll Forward]
Goodwill, end of period		$ 176,000,000
Auto Parts Business | Goodwill | Income Approach Valuation Technique
Goodwill [Line Items]
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount															20.00%
Weighted Average Cost of Capital		10.37%
Fair Value Inputs, Terminal Growth Rate		1.00%
Weighted Average Cost of Capital Sensitivity Analysis, Percent		0.00%
Metal Recycling Business
Goodwill [Line Items]
Goodwill		$ 141,000,000	$ 147,000,000												$ 141,000,000	$ 147,000,000
Goodwill impairment charge		141,000,000
Goodwill [Roll Forward]
Goodwill impairment charge		(141,000,000)
Goodwill, end of period		$ 141,000,000	$ 147,000,000
Metal Recycling Business | Goodwill | Income Approach Valuation Technique
Goodwill [Line Items]
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount																13.00%
Weighted Average Cost of Capital Sensitivity Analysis, Percent			1.00%
Auto and Metals Recycling
Goodwill [Line Items]
Goodwill				166,847,000			175,676,000	325,903,000	325,903,000	$ 166,847,000			$ 175,676,000
Goodwill impairment charge							8,845,000	141,021,000
Goodwill [Roll Forward]
Goodwill, beginning of period							175,676,000	325,903,000
Acquisitions								201,000
Foreign currency translation adjustment							16,000	(9,407,000)
Goodwill impairment charge							(8,845,000)	(141,021,000)
Goodwill, end of period				166,847,000			$ 166,847,000	$ 175,676,000	$ 325,903,000
Regionally Defined Reporting Unit Consisting Of One Component
Goodwill [Line Items]
Goodwill	$ 166,000,000											$ 166,000,000		$ 168,000,000
Goodwill [Roll Forward]
Goodwill, end of period	$ 166,000,000
Regionally Defined Reporting Unit Consisting Of One Component | Goodwill | Income Approach Valuation Technique
Goodwill [Line Items]
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount												27.00%
Weighted Average Cost of Capital	11.20%
Fair Value Inputs, Terminal Growth Rate	2.00%
Weighted Average Cost of Capital Sensitivity Analysis, Percent	2.00%
Regionally Defined Reporting Unit Consisting of Two Components
Goodwill [Line Items]
Goodwill	$ 9,000,000											$ 9,000,000		$ 9,000,000
Goodwill impairment charge				9,000,000
Goodwill [Roll Forward]
Goodwill impairment charge				$ (9,000,000)
Goodwill, end of period	$ 9,000,000