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FAIR VALUE MEASUREMENT - Fair Value Measurement (Details) - USD ($) $ in Thousands	Mar. 30, 2025	Dec. 29, 2024	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents, restricted cash and restricted cash equivalents	$ 64,156	$ 61,100	$ 71,720	$ 99,306
Restricted investments classified as held-to-maturity	88,503	98,592
Municipal debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	20,627	22,355
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	55,606	63,512
Agency mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	11,290	11,754
U.S. government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	980	971
Fair value, recurring | Total fair value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	23,059	22,536
Fair value, recurring | Total fair value | Restricted assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash and cash equivalents	41,097	38,564
Cash, cash equivalents, restricted cash and restricted cash equivalents	64,156	61,100
Restricted investments classified as held-to-maturity	88,503	98,592
Fair value, recurring | Total fair value | Restricted assets | Municipal debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	20,627	22,355
Fair value, recurring | Total fair value | Restricted assets | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	55,606	63,512
Fair value, recurring | Total fair value | Restricted assets | Agency mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	11,290	11,754
Fair value, recurring | Total fair value | Restricted assets | U.S. government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	980	971
Fair value, recurring | Quoted prices in active markets for identical assets (level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	23,059	22,536
Fair value, recurring | Quoted prices in active markets for identical assets (level 1) | Restricted assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash and cash equivalents	41,097	38,564
Cash, cash equivalents, restricted cash and restricted cash equivalents	64,156	61,100
Restricted investments classified as held-to-maturity	0	0
Fair value, recurring | Quoted prices in active markets for identical assets (level 1) | Restricted assets | Municipal debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	0	0
Fair value, recurring | Quoted prices in active markets for identical assets (level 1) | Restricted assets | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	0	0
Fair value, recurring | Quoted prices in active markets for identical assets (level 1) | Restricted assets | Agency mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	0	0
Fair value, recurring | Quoted prices in active markets for identical assets (level 1) | Restricted assets | U.S. government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	0	0
Fair value, recurring | Significant other observable inputs (level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Fair value, recurring | Significant other observable inputs (level 2) | Restricted assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash and cash equivalents	0	0
Cash, cash equivalents, restricted cash and restricted cash equivalents	0	0
Restricted investments classified as held-to-maturity	88,503	98,592
Fair value, recurring | Significant other observable inputs (level 2) | Restricted assets | Municipal debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	20,627	22,355
Fair value, recurring | Significant other observable inputs (level 2) | Restricted assets | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	55,606	63,512
Fair value, recurring | Significant other observable inputs (level 2) | Restricted assets | Agency mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	11,290	11,754
Fair value, recurring | Significant other observable inputs (level 2) | Restricted assets | U.S. government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	980	971
Fair value, recurring | Significant unobservable inputs (level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Fair value, recurring | Significant unobservable inputs (level 3) | Restricted assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash and cash equivalents	0	0
Cash, cash equivalents, restricted cash and restricted cash equivalents	0	0
Restricted investments classified as held-to-maturity	0	0
Fair value, recurring | Significant unobservable inputs (level 3) | Restricted assets | Municipal debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	0	0
Fair value, recurring | Significant unobservable inputs (level 3) | Restricted assets | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	0	0
Fair value, recurring | Significant unobservable inputs (level 3) | Restricted assets | Agency mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	0	0
Fair value, recurring | Significant unobservable inputs (level 3) | Restricted assets | U.S. government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments classified as held-to-maturity	$ 0	$ 0

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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