Revenue Changes in Contract Liabilities (Details) - USD ($) $ in Thousands	4 Months Ended
	Jan. 19, 2020	Jan. 20, 2019
Movement in Deferred Revenue [Roll Forward]
Deferred franchise fees at beginning of period	$ 46,273	$ 50,018
Revenue recognized during the period	(1,632)	(1,592)
Additions during the period	895	500
Deferred franchise fees at end of period	$ 45,536	$ 48,926