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WORKERS' COMPENSATION INSURANCE AND RESERVES - Reconciliation of Workers' Compensation Claims Reserve (Details) - USD ($)
$ in Thousands
Dec. 25, 2015
Dec. 26, 2014
Workers' Compensation Deductible Limit [Line Items]    
Undiscounted workers’ compensation reserve $ 284,306 $ 256,220
Less discount on workers' compensation reserve 18,026 13,381
Workers' compensation reserve, net of discount 266,280 242,839
Less current portion 69,308 64,556
Long-term portion $ 196,972 $ 178,283