Operating (Gains), Losses and Other Charges, Net Narrative (Details) $ in Thousands		3 Months Ended
	Mar. 25, 2020 USD ($) parcel real_estate restaurant	Mar. 25, 2020 USD ($) parcel real_estate restaurant	Mar. 27, 2019 USD ($) parcel restaurant	Dec. 25, 2019 USD ($) real_estate restaurant
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gains on sales of assets and other, net		$ 1,070	$ 9,475
Number of restaurants | restaurant	1,695	1,695
Exit cost liabilities	$ 200	$ 200		$ 200
Severance and other restructuring charges	600	600		$ 900
Impairment charges		2,181	0
Property impairment		1,100
Finance lease right-of-use asset impairment (less than)		100
Operating lease right-of-use asset impairment		1,000
Impairment of franchisee rights	$ 100	$ 100
Company restaurant sales
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gains on sales of assets and other, net			$ 2,200
Number of restaurants | restaurant			3
Real Estate
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gains on sales of assets and other, net			$ 7,500
Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties | real_estate				2
Number of restaurants | restaurant	4	4		4
Carrying amount				$ 1,900
Property				1,600
Other assets				200
Goodwill				$ 100
Disposed of by sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties | real_estate	2	2
Real Estate
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties | parcel	2	2	1