GOODWILL AND INTANGIBLE ASSETS - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Finite Lived Assets
Gross Carrying Amount	$ 59,550	$ 59,250
Accumulated Amortization	(40,436)	(28,207)
Net Carrying Amount	19,114	31,043
Infusion customer relationships
Finite Lived Assets
Gross Carrying Amount	25,650	25,650
Accumulated Amortization	(25,650)	(23,768)
Net Carrying Amount	0	1,882
Managed care contracts
Finite Lived Assets
Gross Carrying Amount	25,000	24,700
Accumulated Amortization	(8,403)	(1,898)
Net Carrying Amount	16,597	22,802
Licenses
Finite Lived Assets
Gross Carrying Amount	5,400	5,400
Accumulated Amortization	(3,681)	(906)
Net Carrying Amount	1,719	4,494
Trade name
Finite Lived Assets
Gross Carrying Amount	1,800	1,800
Accumulated Amortization	(1,181)	(281)
Net Carrying Amount	619	1,519
Non-compete agreements
Finite Lived Assets
Gross Carrying Amount	1,700	1,700
Accumulated Amortization	(1,521)	(1,354)
Net Carrying Amount	$ 179	$ 346