Operating (Gains), Losses and Other Charges, Net (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 27, 2019	Mar. 28, 2018	Dec. 26, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total restructuring charges and exit costs	$ 540	$ 360
Impairment charges	0	37
Operating (gains), losses and other charges, net	(8,935)	360
Gains on sales of assets and other, net	(9,475)	(37)
Restructuring Charges [Abstract]
Exit costs	122	24
Severance and other restructuring charges	418	336
Total restructuring charges and exit costs	540	360
Exit cost liabilities	100		$ 1,200
Accrued severance and other restructuring charges	800		$ 600
Franchisor Owned Outlet [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gains on sales of assets and other, net	(2,204)	0
Real Estate [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gains on sales of assets and other, net	$ (7,498)	$ 0

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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