XML 66 R39.htm IDEA: XBRL DOCUMENT v3.20.4
RESTRICTED CASH AND INVESTMENTS (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 27, 2020
Dec. 29, 2019
Dec. 30, 2018
Restricted Cash and Investments [Line Items]      
Cash collateral held by insurance carriers $ 26,025 $ 24,612  
Cash and cash equivalents held in Trust 29,410 23,681  
Investments held in Trust 152,247 149,373  
Deferred compensation investments 5,915 13,670  
Company-owned life insurance policies 26,267 13,126  
Other restricted cash and cash equivalents 670 6,470  
Total restricted cash and investments 240,534 230,932  
Amortized cost 152,247 149,373  
Gross unrealized gain 6,090 3,394  
Gross unrealized losses (41) (36)  
Fair value 158,296 152,731  
Amortized cost      
Total held-to-maturity investments 152,247 149,373  
Fair value      
Total held-to-maturity investments 158,296 152,731  
Unrealized gains (losses) 723 2,814 $ (3,400)
Municipal debt securities      
Restricted Cash and Investments [Line Items]      
Amortized cost 67,287 72,017  
Gross unrealized gain 3,436 2,219  
Gross unrealized losses 0 0  
Fair value 70,723 74,236  
Amortized cost      
Total held-to-maturity investments 67,287 72,017  
Fair value      
Total held-to-maturity investments 70,723 74,236  
Corporate debt securities      
Restricted Cash and Investments [Line Items]      
Amortized cost 83,467 75,000  
Gross unrealized gain 2,511 1,102  
Gross unrealized losses (41) (34)  
Fair value 85,937 76,068  
Amortized cost      
Total held-to-maturity investments 83,467 75,000  
Fair value      
Total held-to-maturity investments 85,937 76,068  
Agency mortgage-backed securities      
Restricted Cash and Investments [Line Items]      
Amortized cost 493 1,357  
Gross unrealized gain 19 21  
Gross unrealized losses 0 (2)  
Fair value 512 1,376  
Amortized cost      
Total held-to-maturity investments 493 1,357  
Fair value      
Total held-to-maturity investments 512 1,376  
U.S. government and agency securities      
Restricted Cash and Investments [Line Items]      
Amortized cost 1,000 999  
Gross unrealized gain 124 52  
Gross unrealized losses 0 0  
Fair value 1,124 1,051  
Amortized cost      
Total held-to-maturity investments 1,000 999  
Fair value      
Total held-to-maturity investments 1,124 $ 1,051  
Restricted Cash and Investments      
Restricted Cash and Investments [Line Items]      
Amortized cost 152,247    
Fair value 158,296    
Amortized cost      
Due in one year or less 20,307    
Due after one year through five years 115,421    
Due after five years through ten years 16,519    
Total held-to-maturity investments 152,247    
Fair value      
Due in one year or less 20,446    
Due after one year through five years 119,981    
Due after five years through ten years 17,869    
Total held-to-maturity investments $ 158,296