Reportable Segments - Narrative (Details)	4 Months Ended
	Dec. 20, 2017 manager contract segment restaurant mi	Aug. 30, 2017 contract restaurant	Jul. 31, 2017 restaurant
Segment Reporting Information [Line Items]
Number of reportable segments | segment	3
Licensee [Member]
Segment Reporting Information [Line Items]
Number of restaurants			34
Company-owned restaurants [Member]
Segment Reporting Information [Line Items]
Number of reportable segments | segment	1
Number of restaurants	163	167
Culinary contract services [Member]
Segment Reporting Information [Line Items]
Number of CCS locations | contract	22	25
Franchise operations [Member]
Segment Reporting Information [Line Items]
Number of restaurants	111	113
Franchise term	20 years
Radius of exclusive territorial license of franchisee | mi	4
Minimum number of managers to successfully complete training | manager	3