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WORKERS' COMPENSATION INSURANCE AND RESERVES - Reconciliation of Workers' Compensation Claims Reserve (Details) - USD ($)
$ in Thousands
Mar. 25, 2016
Dec. 25, 2015
Workers' Compensation Deductible Limit [Line Items]    
Undiscounted workers’ compensation reserve $ 288,234 $ 284,306
Less discount on workers' compensation reserve 18,223 18,026
Workers' compensation reserve, net of discount 270,011 266,280
Less current portion 66,325 69,308
Long-term portion $ 203,686 $ 196,972