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RESTRICTED CASH AND INVESTMENTS (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 29, 2024
Sep. 24, 2023
Sep. 29, 2024
Sep. 24, 2023
Dec. 31, 2023
Restricted Cash and Investments [Line Items]          
Cash collateral held by insurance carriers $ 22,215   $ 22,215   $ 23,598
Cash and cash equivalents held in Trust 12,187   12,187   12,703
Investments held in Trust 103,627   103,627   122,659
Company owned life insurance policies 41,726   41,726   32,905
Other restricted cash and cash equivalents 369   369   1,120
Restricted cash and investments 180,124   180,124   192,985
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]          
Amortized cost of held-to-maturity investments 103,627   103,627   122,659
Gross unrealized gains 1,097   1,097   533
Gross unrealized losses (964)   (964)   (2,279)
Fair value 103,760   103,760   120,913
Held-to-maturity securities, amortized cost [Abstract]          
Amortized cost of held-to-maturity investments 103,627   103,627   122,659
Held-to-maturity securities, fair value [Abstract]          
Fair value 103,760   103,760   120,913
Unrealized gains (losses) on Investments 2,099 $ (493) 4,821 $ 1,482  
Municipal debt securities          
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]          
Amortized cost of held-to-maturity investments 23,632   23,632   32,042
Gross unrealized gains 8   8   4
Gross unrealized losses (94)   (94)   (242)
Fair value 23,546   23,546   31,804
Held-to-maturity securities, amortized cost [Abstract]          
Amortized cost of held-to-maturity investments 23,632   23,632   32,042
Held-to-maturity securities, fair value [Abstract]          
Fair value 23,546   23,546   31,804
Corporate debt securities          
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]          
Amortized cost of held-to-maturity investments 67,780   67,780   76,578
Gross unrealized gains 810   810   333
Gross unrealized losses (854)   (854)   (1,999)
Fair value 67,736   67,736   74,912
Held-to-maturity securities, amortized cost [Abstract]          
Amortized cost of held-to-maturity investments 67,780   67,780   76,578
Held-to-maturity securities, fair value [Abstract]          
Fair value 67,736   67,736   74,912
Agency mortgage-backed securities          
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]          
Amortized cost of held-to-maturity investments 11,216   11,216   13,039
Gross unrealized gains 279   279   196
Gross unrealized losses 0   0   0
Fair value 11,495   11,495   13,235
Held-to-maturity securities, amortized cost [Abstract]          
Amortized cost of held-to-maturity investments 11,216   11,216   13,039
Held-to-maturity securities, fair value [Abstract]          
Fair value 11,495   11,495   13,235
U.S. government and agency securities          
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]          
Amortized cost of held-to-maturity investments 999   999   1,000
Gross unrealized gains 0   0   0
Gross unrealized losses (16)   (16)   (38)
Fair value 983   983   962
Held-to-maturity securities, amortized cost [Abstract]          
Amortized cost of held-to-maturity investments 999   999   1,000
Held-to-maturity securities, fair value [Abstract]          
Fair value 983   983   $ 962
Restricted cash and investments          
Held-to-maturity Securities, Reconciliation to Fair Value [Abstract]          
Amortized cost of held-to-maturity investments 103,627   103,627    
Fair value 103,760   103,760    
Held-to-maturity securities, amortized cost [Abstract]          
Due in one year or less 28,069   28,069    
Due after one year through five years 63,408   63,408    
Due after five years through ten years 6,212   6,212    
Due after ten years 5,938   5,938    
Amortized cost of held-to-maturity investments 103,627   103,627    
Held-to-maturity securities, fair value [Abstract]          
Due in one year or less 27,869   27,869    
Due after one year through five years 63,346   63,346    
Due after five years through ten years 6,415   6,415    
Due after ten years 6,130   6,130    
Fair value $ 103,760   $ 103,760