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DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 26, 2023 USD ($) restaurant segment state	Mar. 27, 2022 USD ($)	Dec. 25, 2022 USD ($)
Change in Accounting Estimate [Line Items]
Number of restaurants | restaurant	195
Number of states | state	16
Number of restaurants opened | restaurant	9
Operating segments | segment	1
Reportable segments | segment	1
Restaurant operating costs	$ (108,125)	$ (89,200)
Impairment and closure costs	190	$ 17
Contingent consideration liability	22,348		$ 21,296
Accounts receivable	5,064		3,244
Federal deposit insurance corporation (up to)	300
Deferred costs	$ 5,600
Amortization period of deferred costs	7 years
New York City metropolitan area | Revenue | Geographic
Change in Accounting Estimate [Line Items]
Concentration risk percentage	28.00%	31.00%
Credit card processors
Change in Accounting Estimate [Line Items]
Accounts receivable	$ 2,400		$ 700
Spyce
Change in Accounting Estimate [Line Items]
Contingent consideration liability	16,400
Contingent consideration liability	22,300
One Spyce store closed
Change in Accounting Estimate [Line Items]
Impairment and closure costs	$ 200	$ 100
corporate closed store
Change in Accounting Estimate [Line Items]
Number of restaurants | restaurant	3
Occupancy and related expenses
Change in Accounting Estimate [Line Items]
Restaurant operating costs	$ (12,630)	(10,517)
Occupancy and related expenses | Revision of Prior Period, Reclassification, Adjustment
Change in Accounting Estimate [Line Items]
Restaurant operating costs		4,200
Other restaurant operating costs
Change in Accounting Estimate [Line Items]
Restaurant operating costs	$ (20,665)	(17,275)
Other restaurant operating costs | Revision of Prior Period, Reclassification, Adjustment
Change in Accounting Estimate [Line Items]
Restaurant operating costs		$ (4,200)

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