Revenue Changes in Contract Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 05, 2020	Jul. 07, 2019
Movement in Deferred Revenue [Roll Forward]
Deferred franchise fees at beginning of period	$ 46,272	$ 50,018
Revenue recognized	(4,249)	(3,953)
Additions	1,923	970
Deferred franchise fees at end of period	$ 43,946	$ 47,035