Cost, Net of Impairment, and Accumulated Depreciation of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Nov. 21, 2012	Aug. 29, 2012
Property, Plant and Equipment [Line Items]
Property and equipment	$ 383,546	$ 379,397
Less accumulated depreciation and amortization	(209,186)	(205,744)
Property and equipment, net	174,360	173,653
Intangible assets, net	26,351	26,679
Goodwill	195	195
Expected useful life, intangible assets	21 years
Land
Property, Plant and Equipment [Line Items]
Property and equipment	59,432	59,159
Restaurant equipment and furnishings
Property, Plant and Equipment [Line Items]
Property and equipment	110,491	109,059
Restaurant equipment and furnishings | Minimum
Property, Plant and Equipment [Line Items]
Expected useful life	1 year
Restaurant equipment and furnishings | Maximum
Property, Plant and Equipment [Line Items]
Expected useful life	15 years
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment	172,689	167,346
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Expected useful life	20 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Expected useful life	33 years
Leaseholds and Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment	33,450	32,913
Expected useful life, description	Lesser of lease term or estimated useful life
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment	7,071	7,030
Office furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Expected useful life	3 years
Office furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Expected useful life	10 years
Construction in Progress
Property, Plant and Equipment [Line Items]
Property and equipment	$ 413	$ 3,890