Debt And Capital Lease Obligations (Capital Lease And Finance Obligations) (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	May 31, 2014	Jun. 01, 2013	Aug. 31, 2013
Capital Leased Assets [Line Items]
Amount due under capital leases and financing agreements	$ 28,984		$ 5,750
Capital leases and financing obligations for certain information technology equipment entered into	480	257	1,854
Current maturities of capital lease and financing obligations	1,664		1,684
Property and equipment acquired under capital leases and financing agreements	29,790		6,734
Fulfillment Center [Member]
Capital Leased Assets [Line Items]
Capital lease term	20 years
Amount due under capital leases and financing agreements	27,011		2,000
Non-cash financing activity related to the capital lease	$ 25,011		$ 2,437
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