XML 47 R36.htm IDEA: XBRL DOCUMENT v3.8.0.1
WORKERS' COMPENSATION INSURANCE AND RESERVES - Reconciliation of Workers' Compensation Claims Reserve (Details) - USD ($)
$ in Thousands
Apr. 01, 2018
Dec. 31, 2017
Workers' Compensation Insurance and Reserves [Abstract]    
Undiscounted workers’ compensation reserve $ 288,942 $ 293,600
Less discount on workers’ compensation reserve 19,198 19,277
Workers' compensation reserve, net of discount 269,744 274,323
Less current portion 75,692 77,218
Long-term portion $ 194,052 $ 197,105