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EMPLOYEE BENEFIT PLANS (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 26, 2015
Dec. 27, 2014
Defined Benefit Plan Disclosure [Line Items]      
Deferral period 3 years    
Maximum annual contributions per employee, percent 10.00%    
Period of highest consecutive years of compensation 5 years    
Costs associated with deferred compensation plan and executive supplemental life insurance retirement plans $ 2,200 $ 2,600 $ 3,300
Life insurance policies $ 29,456 27,554  
Sensitivity of expected rate of return on plan assets, percent change 0.50%    
Sensitivity of change in expected rate of return, annual pension expense amount $ 1,300    
Employer contributions 4,000    
Expected employer contributions in 2017 4,000    
Accumulated benefit obligation 1,200 900  
Costs associated with employee savings plan $ 6,200 $ 5,300 $ 4,900
Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Weighted average target plan asset allocations 45.00%    
Fixed Income Securities      
Defined Benefit Plan Disclosure [Line Items]      
Weighted average target plan asset allocations 31.50%    
Other Securities      
Defined Benefit Plan Disclosure [Line Items]      
Weighted average target plan asset allocations 23.50%