Non-Recurring Fair Value Measurements Related to Impaired Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Nov. 21, 2012	Nov. 23, 2011	Aug. 29, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment	$ 174,360		$ 173,653
Total impairments	(90)	(175)
Continuing Operations | Company Owned Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment	20
Total impairments	(90)
Continuing Operations | Culinary Contract Services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment		57
Total impairments		(175)
Significant Unobservable Inputs (Level 3) | Continuing Operations | Company Owned Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment	20
Significant Unobservable Inputs (Level 3) | Continuing Operations | Culinary Contract Services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment		57
Corporate Assets | Discontinued operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment		802
Total impairments		(373)
Corporate Assets | Significant Unobservable Inputs (Level 3) | Discontinued operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property and equipment		$ 802