SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Deferred Financing Costs and Insurance Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2023	Dec. 28, 2022	Dec. 29, 2021
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Amortization of Debt Issuance Costs	$ 201	$ 340	$ 251
Accrued insurance	11,831	11,120
Expense for payroll and benefits reserves	9,200	8,700	9,000
Other Assets
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Deferred financing fees net of accumulated amortization	700	900
Interest Expense
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Amortization of Debt Issuance Costs	$ 200	$ 300	$ 300