SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) visit	Mar. 31, 2017	Dec. 31, 2017 USD ($)
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Episode of care as episodic-based revenue (days)	60 days
Net service revenue episode payment rate (days)	60 days
Percentage of total reimbursement of outlier payment	10.00%
Low utilization payment adjustment, maximum number of visits	5
First threshold of therapy services required (visits)	6
Second threshold of therapy services required (visits)	14
Third threshold of therapy services required (visits)	20
Historical collection rate from Medicare	99.00%
Hospice Medicare revenue rate accounted for routine care	99.00%	98.00%
Minimum
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Non-Medicare revenue term rates	90.00%
Maximum
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Non-Medicare revenue term rates	100.00%
Home Health
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Historical collection rate from Medicare	99.00%
Hospice
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Historical collection rate from Medicare	99.00%
Cap Year 2013 Through 2018
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Estimated amounts due back to Medicare | $	$ 0.8		$ 0.9
Medicare Revenue | Net Service Revenue
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Percent of net services revenue	74.00%	77.00%