Property and Equipment, Intangible Assets and Goodwill - Property and Equipment (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 14, 2018	Aug. 30, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 320,487	$ 317,538
Less accumulated depreciation and amortization	(150,948)	(144,724)
Property and equipment, net	169,539	172,814
Intangible assets, net	$ 18,836	19,640
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	$ 59,717	60,414
Restaurant equipment and furnishings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 77,866	73,411
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	$ 152,474	153,041
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	$ 26,588	26,953
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 3,807	3,684
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
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 35	$ 35