Revenue Changes in Contract Liabilities (Details) - USD ($) $ in Thousands	4 Months Ended
	Jan. 17, 2021	Jan. 19, 2020
Movement in Deferred Revenue [Roll Forward]
Deferred franchise fees at beginning of period	$ 43,541	$ 46,273
Revenue recognized	(1,779)	(1,632)
Additions	428	895
Deferred franchise fees at end of period	$ 42,190	$ 45,536