SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition by Payor Class (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Revenue by payor class as a percentage of total net service revenue	100.00%	100.00%	100.00%
Home Health Medicare [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Revenue by payor class as a percentage of total net service revenue	41.00%	44.00%	50.00%
Home Health Non-Medicare - Episodic Based [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Revenue by payor class as a percentage of total net service revenue	7.00%	9.00%	9.00%
Home Health Non-Medicare - Non-Episodic Based [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Revenue by payor class as a percentage of total net service revenue	13.00%	12.00%	12.00%
Hospice Medicare [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Revenue by payor class as a percentage of total net service revenue	34.00%	30.00%	23.00%
Hospice Non-Medicare [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Revenue by payor class as a percentage of total net service revenue	2.00%	1.00%	1.00%
Personal Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Revenue by payor class as a percentage of total net service revenue	3.00%	4.00%	5.00%