Property and Equipment, Intangible Assets and Goodwill - Property and Equipment (Details) $ in Thousands	12 Months Ended
	Aug. 26, 2020 USD ($)
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 241,773
Less accumulated depreciation and amortization	(141,174)
Property and equipment, net	100,599
Intangible assets, net	$ 15,343
Minimum
Property, Plant and Equipment [Line Items]
Intangible assets, net, estimated useful lives	15 years
Maximum
Property, Plant and Equipment [Line Items]
Intangible assets, net, estimated useful lives	21 years
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 42,572
Restaurant equipment and furnishings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 60,685
Restaurant equipment and furnishings | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	3 years
Restaurant equipment and furnishings | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	15 years
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 114,909
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	20 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	33 years
Leasehold and leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 20,429
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 3,178
Office furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	3 years
Office furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	10 years