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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	3 Months Ended						12 Months Ended
	Sep. 27, 2023 USD ($)	Jun. 28, 2023 USD ($)	Mar. 29, 2023 USD ($)	Sep. 28, 2022 USD ($)	Jun. 29, 2022 USD ($)	Mar. 30, 2022 USD ($)	Dec. 27, 2023 USD ($) operating_segment reportable_segment renewal_option	Dec. 28, 2022 USD ($)	Dec. 29, 2021 USD ($)
Variable Interest Entity [Line Items]
General and administrative expenses	$ 30,939	$ 31,476	$ 31,311	$ 26,931	$ 29,487	$ 31,386	$ 129,542	$ 120,009	$ 87,196
Number of operating segments | operating_segment							1
Number of reportable segments | reportable_segment							1
Capitalized implementation costs							$ 5,572	6,212
Indefinite-lived intangible assets							1,903	1,837
Gift card breakage income							327	1,472
Cumulative catch-up adjustment								1,281
Advertising and promotions							$ 12,437	12,376	5,677
Number of renewal options | renewal_option							2
Period of renewal term							5 years
Maximum
Variable Interest Entity [Line Items]
Terms of lease contract (in years)							15 years
Maximum | Furniture and fixtures
Variable Interest Entity [Line Items]
Useful life of property and equipment (in years)							7 years
Maximum | Equipment
Variable Interest Entity [Line Items]
Useful life of property and equipment (in years)							7 years
Maximum | Computer equipment and software
Variable Interest Entity [Line Items]
Useful life of property and equipment (in years)							5 years
Minimum
Variable Interest Entity [Line Items]
Terms of lease contract (in years)							10 years
Minimum | Furniture and fixtures
Variable Interest Entity [Line Items]
Useful life of property and equipment (in years)							5 years
Minimum | Equipment
Variable Interest Entity [Line Items]
Useful life of property and equipment (in years)							5 years
Minimum | Computer equipment and software
Variable Interest Entity [Line Items]
Useful life of property and equipment (in years)							2 years
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Net assets of SSE Holdings							$ 388,250	362,571
Revision of Prior Period, Reclassification, Adjustment
Variable Interest Entity [Line Items]
General and administrative expenses								$ 1,219	$ 1,200

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