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WORKERS' COMPENSATION - Workers' Liability (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Workers' Liability [Roll Forward]    
Beginning balance $ 7,925 $ 10,164
Claims and valuation adjustments (229) 1,748
Payments (213) (182)
Ending balance 7,483 11,730
Less: current portion 1,283 1,819
Long-term workers' compensation liability $ 6,200 $ 9,911