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Revenues Impact of Adoption (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 25, 2019	Sep. 25, 2019	Jun. 26, 2019	Mar. 27, 2019	Dec. 26, 2018	Sep. 26, 2018	Jun. 27, 2018	Mar. 28, 2018	Dec. 25, 2019	Dec. 26, 2018	Dec. 27, 2017	Dec. 28, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred franchise revenue included in other noncurrent liabilities	$ 21,021								$ 21,021
Other current liabilities	(57,307)				$ (61,790)				(57,307)	$ (61,790)
Deferred income taxes, net	14,718				17,333				14,718	17,333
Shareholders’ deficit	(138,064)				(133,345)				(138,064)	(133,345)	$ (97,360)	$ (71,112)
Revenue	113,836	$ 124,258	$ 151,884	$ 151,411	159,549	$ 158,023	$ 157,334	$ 155,273	541,389	630,179	529,169
Franchise and license revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue	$ 65,033	$ 60,676	$ 56,437	$ 52,866	55,160	$ 54,414	$ 54,593	$ 54,080	235,012	218,247	138,817
Advertising
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue									$ 81,144	78,308	0
Adjustments | Adjustments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other current liabilities					407					407
Accrued advertising											500
Deferred income taxes, net					(4,988)					(4,988)
Adjustments | Adjustments | Franchise and license revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred franchise revenue included in other noncurrent liabilities					21,000					21,000
Deferred income taxes, net					5,400					5,400
Shareholders’ deficit					15,600					15,600	100
Revenue					(21,162)					(82,815)
Adjustments | Adjustments | Gift Card Redemption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other current liabilities											$ 600
Adjustments | Adjustments | Advertising
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue					19,900					78,300
Adjustments | Adjustments | Franchise Fees Gross
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue					1,000					3,000
Pro Forma | Adjustments | Adjustments | Franchise and license revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue					$ 200					$ 1,500

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for advertising of the entity's goods and services.

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