GOODWILL AND INTANGIBLE ASSETS - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite Lived Assets
Gross Carrying Amount	$ 59,550	$ 59,550
Accumulated Amortization	(49,080)	(40,436)
Net Carrying Amount	10,470	19,114
Infusion customer relationships
Finite Lived Assets
Gross Carrying Amount	25,650	25,650
Accumulated Amortization	(25,650)	(25,650)
Net Carrying Amount	0	0
Managed care contracts
Finite Lived Assets
Gross Carrying Amount	25,000	25,000
Accumulated Amortization	(14,576)	(8,403)
Net Carrying Amount	10,424	16,597
Licenses
Finite Lived Assets
Gross Carrying Amount	5,400	5,400
Accumulated Amortization	(5,400)	(3,681)
Net Carrying Amount	0	1,719
Trade name
Finite Lived Assets
Gross Carrying Amount	1,800	1,800
Accumulated Amortization	(1,800)	(1,181)
Net Carrying Amount	0	619
Non-compete agreements
Finite Lived Assets
Gross Carrying Amount	1,700	1,700
Accumulated Amortization	(1,654)	(1,521)
Net Carrying Amount	$ 46	$ 179