XML 86 R68.htm IDEA: XBRL DOCUMENT v3.3.1.900
WORKERS' COMPENSATION INSURANCE AND RESERVES - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 25, 2015
Dec. 26, 2014
Dec. 27, 2013
Workers' Compensation Deductible Limit [Line Items]      
Workers' compensation claim deductible limit $ 2,000    
Weighted average period - claim payments below deductible limit 5 years    
Payments made against self-insured claims $ 70,700 $ 60,600 $ 49,100
Weighted average period - claim payments and receivables above deductible limit 16 years    
Excess claims $ 49,026 42,612  
Workers' compensation claim receivables net of valuation allowance 45,152 38,679  
Workers' compensation expense $ 98,239 $ 77,461 $ 63,237
Below limit      
Workers' Compensation Deductible Limit [Line Items]      
Weighted average rate 1.80% 1.70%