COMMITMENTS AND CONTINGENCIES - Insurance Programs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Health insurance	$ 12.4	$ 14.1
Workers’ compensation	30.9	29.3
Professional liability	4.3	4.3
Estimated Insurance Total	47.6	47.7
Less: long-term portion	(1.1)	(1.2)
Estimated Insurance Excluding Long Term Portion	$ 46.5	$ 46.5