Dispositions (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Sep. 21, 2018	Jun. 25, 2019	Jun. 26, 2018	Jun. 25, 2019	Jun. 26, 2018
Costs and expenses:
(Loss) income from discontinued operations		$ 0	$ (170)	$ 0	$ 225
Sullivan's | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Sullivan's sale	$ 32,000
Disposal costs netted against gross proceeds	$ 2,000
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Revenues			14,322		30,279
Costs and expenses:
Cost of sales			4,419		9,356
Restaurant operating expenses			7,070		15,064
Marketing and advertising costs			331		820
General and administrative costs			514		1,055
Disposition costs			20		69
Lease termination and closing costs			434		798
Impairment charges			0		84
Depreciation and amortization			1,057		2,103
Total costs and expenses			13,845		29,349
Income from discontinued operation before income taxes			477		930
Income tax expense			647		705
(Loss) income from discontinued operations			(170)		225
Discontinued Operation, Alternative Cash Flow Information [Abstract]
Depreciation and amortization			$ 1,057		2,103
Capital expenditures					$ 462