Supplemental Consolidated Cash Flow Information (Additional Information Related To Cash Flows) (Details) - USD ($) $ in Thousands	4 Months Ended
	Jan. 21, 2018	Jan. 22, 2017
Supplemental Cash Flow Information [Abstract]
Interest, net of amounts capitalized	$ 12,632	$ 9,691
Income tax payments	1,344	47
Decrease in obligations for purchases of property and equipment	4,201	2,841
Decrease in obligations for treasury stock repurchases	0	7,208
Increase in notes receivable from the sale of company-operated restaurants	9,084	0
Franchise Tenant Improvement Allowances	5,325	0
Increase in dividends accrued or converted to common stock equivalents	78	74
Decrease in capital lease obligations from the termination of equipment and building leases	685	87
Equipment capital lease obligations incurred	$ 39	$ 59