Reportable Segments - Narrative (Details)	6 Months Ended
	Mar. 14, 2018 manager segment contract restaurant	Aug. 30, 2017 contract restaurant
Segment Reporting Information [Line Items]
Number of reportable segments | segment	3
Licensee
Segment Reporting Information [Line Items]
Number of restaurants	36
Company-owned restaurants
Segment Reporting Information [Line Items]
Number of reportable segments | segment	1
Number of restaurants | restaurant	160	167
Culinary contract services
Segment Reporting Information [Line Items]
Number of CCS locations | contract	24	25
Franchise operations
Segment Reporting Information [Line Items]
Number of restaurants | restaurant	110	113
Franchise term	20 years
Minimum number of managers to successfully complete training | manager	3