Discontinued Operations (Details) $ in Thousands	3 Months Ended				9 Months Ended
	May 31, 2016 USD ($)	Feb. 29, 2016 USD ($)	May 31, 2015 USD ($) store	Feb. 28, 2015 USD ($)	May 31, 2016 USD ($)	May 31, 2015 USD ($) store
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations before income taxes	$ (130)		$ (1,812)		$ (1,225)	$ (7,070)
Income tax benefit	14		578		19	756
Loss from discontinued operations, net of tax	(116)		$ (1,234)		(1,206)	$ (6,314)
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	0		$ 1,440		0	$ 8,210
Loss from Discontinued Operations, Net of Tax
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Long-lived assets	$ 0	$ 1,000	$ 0	$ 3,000	$ 673	$ 2,666