Restructuring Charges and Other Exit-Related Costs Restructuring and Related Costs (Details) $ in Thousands	3 Months Ended
	Nov. 30, 2016 USD ($)	Nov. 30, 2015 USD ($)	Feb. 28, 2015 store
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 24	$ 1,896
Other Exit-Related Activities	158	0
Restructuring Charges and Other Exit-Related Activities	182	1,896
Total restructuring charges to date	14,270
Total expected restructuring charges	14,400
All Other Plans
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	88	90
Restructuring Charges and Other Exit-Related Activities	88	90
Q2’15 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	(64)	1,806
Restructuring Charges and Other Exit-Related Activities	94	1,806
Total restructuring charges to date	14,270
Total expected restructuring charges	14,400
Severance costs
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	(62)	1,161
Total restructuring charges to date	10,213
Total expected restructuring charges	10,213
Severance costs | All Other Plans
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0	0
Severance costs | Q2’15 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	(62)	1,161
Contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	86	735
Total restructuring charges to date	2,008
Total expected restructuring charges	2,138
Contract termination costs | All Other Plans
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	88	90
Contract termination costs | Q2’15 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	(2)	645
Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0	0
Total restructuring charges to date	2,049
Total expected restructuring charges	2,049
Other restructuring costs | All Other Plans
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0	0
Other restructuring costs | Q2’15 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0	0
Asset Impairments and Accelerated Depreciation
Restructuring Cost and Reserve [Line Items]
Asset impairment and accelerated depreciation	158	0
Asset Impairments and Accelerated Depreciation | All Other Plans
Restructuring Cost and Reserve [Line Items]
Asset impairment and accelerated depreciation	0	0
Asset Impairments and Accelerated Depreciation | Q2’15 Plan
Restructuring Cost and Reserve [Line Items]
Asset impairment and accelerated depreciation	158	0
Other Exit-Related Activity
Restructuring Cost and Reserve [Line Items]
Other Exit-Related Activities	158	0
Other Exit-Related Activity | All Other Plans
Restructuring Cost and Reserve [Line Items]
Other Exit-Related Activities	0	0
Other Exit-Related Activity | Q2’15 Plan
Restructuring Cost and Reserve [Line Items]
Other Exit-Related Activities	158	0
Segment Reconciling Items | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Restructuring Charges and Other Exit-Related Activities	201	1,925
Segment Reconciling Items | Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	(19)	(29)
Restructuring Charges and Other Exit-Related Activities	(19)	(29)
Total restructuring charges to date	1,644
Total expected restructuring charges	1,699
Segment Reconciling Items | Other Exit-Related Activity
Restructuring Cost and Reserve [Line Items]
Other Exit-Related Activities	158	0
Segment Reconciling Items | Other Exit-Related Activity | Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Other Exit-Related Activities	$ 0	$ 0
Auto Parts Stores
Restructuring Cost and Reserve [Line Items]
Number of Stores | store			7