Debt And Capital Lease Obligations (Capital Lease And Finance Obligations) (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Mar. 01, 2014	Aug. 31, 2013
Capital Leased Assets [Line Items]
Capital leases and financing obligations for certain information technology equipment entered into	$ 254	$ 1,854
Amount due under capital leases and financing agreements	28,240	5,750
Current maturities of capital lease and financing obligations	1,571	1,684
Property and equipment acquired under capital leases and financing agreements	29,190	6,734
Fulfillment Center [Member]
Capital Leased Assets [Line Items]
Capital lease term	20 years
Non-cash financing activity related to the capital lease	24,024
Amount due under capital leases and financing agreements	$ 26,024	$ 2,000
Minimum [Member] | Fulfillment Center [Member]
Capital Leased Assets [Line Items]
Capital lease, prepayment term with no penalty	7 years
Maximum [Member] | Fulfillment Center [Member]
Capital Leased Assets [Line Items]
Capital lease, prepayment term with no penalty	20 years