Income Tax Assets and Liabilities for Continuing and Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 29, 2012	Aug. 31, 2011
Deferred income tax assets:
Workers' compensation, employee injury, and general liability claims	$ 8	$ 11
Deferred compensation	895	396
Net operating losses	1,100	4,978
General business credits	6,445	5,695
Straight-line rent, dining cards, accruals, and other	3,253	2,446
Subtotal	11,701	13,526
Valuation allowance		(2,639)
Total deferred income tax assets	11,701	10,887
Deferred income tax liabilities:
Depreciation, amortization and impairments	100	135
Property taxes and other	1,611	1,101
Total deferred income tax liabilities	1,711	1,236
Net deferred income tax asset	$ 9,990	$ 9,651