GOODWILL AND INTANGIBLE ASSETS - Finite-Lived Intangible Asset Useful Life (Details)	12 Months Ended
	Dec. 31, 2018
Infusion customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	5 months
Infusion customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	4 years
Managed care contracts
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	4 years
Licenses
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	2 years
Trade name
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	2 years
Non-compete agreements | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	1 year
Non-compete agreements | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives	5 years