Discontinued Operations (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Aug. 31, 2015 USD ($) store	May. 31, 2015 USD ($)	Feb. 28, 2015 USD ($)	Nov. 30, 2014 USD ($)	Aug. 31, 2014 USD ($)	May. 31, 2014 USD ($)	Feb. 28, 2014 USD ($)	Nov. 30, 2013 USD ($)	Aug. 31, 2015 USD ($) store	Aug. 31, 2014 USD ($)	Aug. 31, 2013 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Amount of Adjustment to Prior Period Gain (Loss) on Disposal, Net of Tax										$ 1,000
Loss from discontinued operations, before income taxes									$ (7,227)	(2,888)	$ (4,725)
Income tax benefit									0	79	483
Loss from discontinued operations, net of tax	$ (913)	$ (1,234)	$ (4,242)	$ (838)	$ (493)	$ (330)	$ (1,010)	$ (976)	$ (7,227)	(2,809)	(4,242)
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								6
Revenues									$ 8,263	$ 15,682	$ 8,270