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WORKERS' COMPENSATION INSURANCE AND RESERVES - Reconciliation of Workers' Compensation Claims Reserve (Details) - USD ($)
$ in Thousands
Jan. 01, 2017
Dec. 25, 2015
Workers' Compensation Deductible Limit [Line Items]    
Undiscounted workers’ compensation reserve $ 292,169 $ 284,306
Less discount on workers' compensation reserve 14,818 18,026
Workers' compensation reserve, net of discount 277,351 266,280
Less current portion 79,126 69,308
Long-term portion $ 198,225 $ 196,972