Discontinued Operations (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Aug. 31, 2017 USD ($)	May 31, 2017 USD ($)	Feb. 28, 2017 USD ($)	Nov. 30, 2016 USD ($)	Aug. 31, 2016 USD ($) Property	May 31, 2016 USD ($)	Feb. 29, 2016 USD ($)	Nov. 30, 2015 USD ($)	Aug. 31, 2017 USD ($)	Aug. 31, 2016 USD ($) Property	Aug. 31, 2015 USD ($) store	Feb. 28, 2015 store
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset Impairment Charges									$ (717)	$ 20,682	$ 45,119
Capital Leased Assets, Number of Units Impaired | Property					2					2
Loss from discontinued operations, net of tax	$ (114)	$ (127)	$ (95)	$ (53)	$ (143)	$ (116)	$ (1,024)	$ (65)	(390)	$ (1,348)	$ (7,227)
Auto Parts Stores
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Stores | store											7	7
Auto Parts Stores | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Stores | store											6
Revenues									0	0	$ 8,263
Loss from discontinued operations, before income taxes									(390)	(1,348)	(7,227)
Income tax expense									0	0	0
Loss from discontinued operations, net of tax									(390)	(1,348)	(7,227)
Income (Loss) from Discontinued Operations, Net of Tax
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset Impairment Charges									$ 0	$ 947	$ 2,666