Revenue (Contract Liabilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 27, 2020	Sep. 29, 2019
Movement in Deferred Revenue [Roll Forward]
Deferred franchise fees at beginning of period	$ 46,273	$ 50,018
Revenue recognized during the period	(5,440)	(5,173)
Additions during the period	2,708	1,428
Deferred franchise fees at end of period	$ 43,541	$ 46,273