Property and Equipment, Intangible Assets and Goodwill - Property and Equipment (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 13, 2019	Aug. 29, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 274,925	$ 278,820
Less accumulated depreciation and amortization	(144,004)	(140,533)
Property and equipment, net	130,921	138,287
Intangible assets, net	$ 17,286	18,179
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	$ 46,677	46,817
Restaurant equipment and furnishings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 70,676	69,678
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	$ 130,521	131,557
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	$ 23,638	27,172
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 3,413	$ 3,596
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