Revenue Disaggregation of Revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jul. 07, 2019	Jul. 08, 2018	Jul. 07, 2019	Jul. 08, 2018
Disaggregation of Revenue [Line Items]
Initial franchise fee			$ 50,000
Royalty and marketing fee, percent of gross sales			5.00%
Revenues	$ 222,359,000	$ 187,983,000	$ 728,872,000	$ 692,218,000
Restaurant Sales [Member]
Disaggregation of Revenue [Line Items]
Revenues	78,434,000	87,574,000	257,948,000	371,149,000
Franchise [Member]
Disaggregation of Revenue [Line Items]
Franchise rental revenues	63,359,000	$ 61,622,000	208,895,000	$ 196,682,000
Royalty [Member]
Disaggregation of Revenue [Line Items]
Revenues	38,752,000		125,407,000
Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenues	37,269,000		121,078,000
Technology Service [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,117,000		10,111,000
Franchise Fees [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 1,428,000		$ 5,433,000