COMMITMENTS AND CONTINGENCIES - Insurance Programs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Health insurance	$ 15.8	$ 12.4
Workers’ compensation	33.4	30.9
Professional liability	5.1	4.3
Estimated Insurance Total	54.3	47.6
Less: long-term portion	(1.3)	(1.1)
Estimated Insurance Excluding Long Term Portion	$ 53.0	$ 46.5