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ACCRUED EXPENSES - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Payables and Accruals [Abstract] |  |
Accrued health insurance | $ 14.7 | $ 9.0
Accrual loss for workers' compensation, comprehensive general liability and vehicle liability self-insurance programs | 53.9 | 47.9
Accrued compensation and benefits increase | 22.0 |
Accrued legal matters | 7.5 | 1.4
Accrued severance charges | 2.7 | $ 3.5
Derivative liability | $ 8.8 |

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