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WORKERS' COMPENSATION INSURANCE AND RESERVES (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 26, 2021
Dec. 27, 2020
Dec. 29, 2019
Workers' Compensation Deductible Limit [Line Items]      
Workers' compensation claim deductible limit $ 2,000    
Weighted average period - claim payments below deductible limit 5 years 6 months    
Undiscounted workers’ compensation reserve $ 273,000 $ 273,502  
Less discount on workers’ compensation reserve 16,806 18,009  
Workers’ compensation reserve, net of discount 256,194 255,493  
Less current portion 61,596 66,007  
Long-term portion 194,598 189,486  
Payments made against self-insured claims $ 41,900 52,800 $ 63,100
Weighted average period - claim payments and receivables above deductible limit 17 years    
Workers' compensation excess claims reserve $ 62,684 54,000  
Worker's compensation excess claim receivables, net of valuation allowance 61,386 52,934  
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Beginning balance 3,072 1,780  
Ending balance 2,368 3,072 1,780
Expected Future Workers' Compensation Payments [Abstract]      
2020 61,596    
2021 32,921    
2022 19,117    
2023 12,694    
2024 9,363    
Thereafter 57,819    
Sub-total 193,510    
Excess claims 62,684 54,000  
Total 256,194    
Workers' compensation costs 39,800 49,400 60,200
Allowance for Receivable from Insurance Provider      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Beginning balance 85 629 3,314
Charged to expense 13 13 120
Release of allowance 0 (629) (2,805)
Ending balance 98 85 629
Allowance for Receivable from Insurance Provider | Cumulative Effect, Period of Adoption, Adjustment      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Beginning balance $ 0 72 0
Ending balance   $ 0 $ 72
Below limit      
Workers' Compensation Deductible Limit [Line Items]      
Workers' compensation discount, percent 1.60% 1.80%  
Above limit [Member]      
Workers' Compensation Deductible Limit [Line Items]      
Workers' compensation discount, percent 1.80% 1.30%