Summary Of Refranchisings, Franchisee Development And Acquisitions (Number Of Restaurants Sold And Developed By Franchisees And Related Gains And Fees Recognized) (Details) $ in Thousands		3 Months Ended			6 Months Ended
		Jul. 08, 2018 USD ($) restaurant	Apr. 15, 2018 USD ($) restaurant	Apr. 16, 2017 USD ($) restaurant	Apr. 15, 2018 USD ($) restaurant	Apr. 16, 2017 USD ($) restaurant
Receivable [Domain]
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items]
Proceeds from Divestiture of Businesses, Net of Cash Divested	[1]		$ 22,422
Restaurants sold to franchisees | restaurant			63	60	85	60
New restaurants opened by franchisees | restaurant			3	6	8	13
Initial franchise fees			$ 2,735	$ 2,538	$ 3,730	$ 2,828
Proceeds from Divestiture of Businesses, Net of Cash Divested	[1]			0	31,506	0
Total Proceeds from the Sale of Company-Operated Restaurants			33,675	31,251	48,350	31,389
Proceeds from Divestiture of Businesses	[2]		11,253	31,251	16,844	31,389
Net assets sold (primarily property and equipment)			(9,509)	(10,306)	(13,146)	(10,306)
Operating Leases, Rent Expense, Sublease Rentals	[3]		(863)	(7,651)	(863)	(7,651)
Goodwill related to the sale of company-operated restaurants			(3,807)	(341)	(3,960)	(342)
Disposal Group Not Discontinued Operation Other Gain Loss On Disposal	[4]		$ (14,024)	$ (5,174)	(15,969)	(5,174)
Additional proceeds from the sale of a company-operated restaurant					1,200	100
Proceeds from Sale and Collection of Notes Receivable					9,100
Disposal Group Not Discontinued Operation Other Gain Loss On Disposal related to PY					8,800
Gain (Loss) on Sale of Assets and Asset Impairment Charges					$ 200	3,100
Impairment of Long-Lived Assets to be Disposed of						$ 1,400
Number of restaurants | restaurant			2,245	2,260	2,245	2,260
Disposal Group, Held-for-sale, Not Discontinued Operations
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items]
Number of restaurants		25
Disposal Group, Held-for-sale, Not Discontinued Operations | Equipment
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items]
Number of restaurants | restaurant		21
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Equipment
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items]
Assets held for sale and leaseback			$ 3,300		$ 3,300
Forecast | Minimum
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items]
Proceeds from sale of franchisees		$ 16,000
Forecast | Maximum
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items]
Proceeds from sale of franchisees		$ 18,000
Remodel Credit
Summary Of Refranchisings, Franchisee Development And Acquisitions [Line Items]
Disposal Group Not Discontinued Operation Other Gain Loss On Disposal			$ 3,700		$ 5,200

[1] (2)We collected payments of $9.1 million related to notes due from franchisees in the first quarter of 2018.

[2] (1)Year-to-date, amounts in 2018 and 2017 include additional proceeds of $1.2 million and $0.1 million, respectively, related to restaurants sold in prior years. There were no additional proceeds and an immaterial amount of additional proceeds recognized during the quarter in 2018 and 2017

[3] (3)Charges are for operating restaurant leases with lease commitments in excess of our sublease rental income from franchisees.

[4] (4)Amounts in 2018 include an $8.8 million reduction of gains related to the modification of certain 2017 refranchising transactions. The quarter and year-to-date amounts in 2018 also include $3.7 million and $5.2 million, respectively, of costs related to franchise remodel incentives. Amounts in 2017 primarily represent impairment of $3.1 million and equipment write-offs of $1.4 million related to restaurants closed in connection with the sale of the related markets.