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RESTRICTED CASH AND INVESTMENTS (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 26, 2023
Mar. 27, 2022
Dec. 25, 2022
Restricted Cash and Investments [Line Items]      
Cash collateral held by insurance carriers $ 29,839   $ 29,567
Cash and cash equivalents held in Trust 31,408   30,857
Investments held in Trust 123,577   123,678
Company owned life insurance policies 26,896   26,479
Other restricted cash and cash equivalents 1,120   3,153
Restricted cash and investments 212,840   213,734
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]      
Amortized cost of held-to-maturity investments 123,577   123,678
Gross unrealized gains 36   6
Gross unrealized losses (3,372)   (4,159)
Fair value 120,241   119,525
Held-to-maturity securities, amortized cost [Abstract]      
Amortized cost of held-to-maturity investments 123,577   123,678
Held-to-maturity securities, fair value [Abstract]      
Fair value 120,241   119,525
Unrealized gains (losses) on Investments 417 $ (2,011)  
Municipal debt securities      
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]      
Amortized cost of held-to-maturity investments 41,606   42,892
Gross unrealized gains 10   2
Gross unrealized losses (286)   (463)
Fair value 41,330   42,431
Held-to-maturity securities, amortized cost [Abstract]      
Amortized cost of held-to-maturity investments 41,606   42,892
Held-to-maturity securities, fair value [Abstract]      
Fair value 41,330   42,431
Corporate debt securities      
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]      
Amortized cost of held-to-maturity investments 80,933   79,736
Gross unrealized gains 26   4
Gross unrealized losses (3,049)   (3,643)
Fair value 77,910   76,097
Held-to-maturity securities, amortized cost [Abstract]      
Amortized cost of held-to-maturity investments 80,933   79,736
Held-to-maturity securities, fair value [Abstract]      
Fair value 77,910   76,097
Agency mortgage-backed securities      
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]      
Amortized cost of held-to-maturity investments 998   50
Gross unrealized gains 0   0
Gross unrealized losses (36)   (2)
Fair value 962   48
Held-to-maturity securities, amortized cost [Abstract]      
Amortized cost of held-to-maturity investments 998   50
Held-to-maturity securities, fair value [Abstract]      
Fair value 962   48
U.S. government and agency securities      
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]      
Amortized cost of held-to-maturity investments 40   1,000
Gross unrealized gains 0   0
Gross unrealized losses (1)   (51)
Fair value 39   949
Held-to-maturity securities, amortized cost [Abstract]      
Amortized cost of held-to-maturity investments 40   1,000
Held-to-maturity securities, fair value [Abstract]      
Fair value 39   $ 949
Restricted cash and investments      
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]      
Amortized cost of held-to-maturity investments 123,577    
Fair value 120,241    
Held-to-maturity securities, amortized cost [Abstract]      
Due in one year or less 41,768    
Due after one year through five years 81,809    
Amortized cost of held-to-maturity investments 123,577    
Held-to-maturity securities, fair value [Abstract]      
Due in one year or less 41,340    
Due after one year through five years 78,901    
Fair value $ 120,241