Revenue Disaggregation of Revenue (Details) - USD ($) $ in Thousands	4 Months Ended
	Jan. 20, 2019	Jan. 21, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 290,786	$ 294,463
Franchise [Member]
Disaggregation of Revenue [Line Items]
Franchise rental revenues	83,890	$ 77,217
Royalty [Member]
Disaggregation of Revenue [Line Items]
Revenues	49,507
Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenues	47,863
Technology Service [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,951
Franchise Fees [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 2,743