NATURE OF OPERATIONS, CONSOLIDATION AND PRESENTATION OF FINANCIAL STATEMENTS - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) care_center state numberOfJointVentures	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Organization And Nature Of Operations [Line Items]
Number of states with facilities | state	38
Minimum percent ownership for controlling interest (percent)	50.00%
Maximum ownership percentage for equity method investment (percent)	50.00%
Purchase of investment	$ 5,200	$ 875	$ 210
Equity method investment, aggregate cost	$ 53,100	14,200
Maximum ownership percentage for cost method investment (percent)	20.00%
Proceeds from sale of equity method investment	$ 0	17,876	0
Gain (loss) on equity method investments	$ 31,098	(2,980)	$ 0
Number Of Consolidated Entities Classified As Variable Interest Entities | numberOfJointVentures	7
Cash and cash equivalents	$ 42,694	81,808
Patient accounts receivable	274,961	255,145
Other current assets	25,598	13,265
Total current assets	356,684	361,984
Property and equipment	18,435	23,719
Total assets	1,856,968	1,567,198
Payroll and employee benefits	141,001	146,929
Accrued expenses	150,836	166,192
Current portion of long-term obligations	12,995	10,496
Total current liabilities	374,282	456,337
Other long-term obligations	4,979	33,622
Total liabilities	880,645	$ 756,457
Variable Interest Entity, Primary Beneficiary [Member]
Organization And Nature Of Operations [Line Items]
Cash and cash equivalents	3,100
Patient accounts receivable	2,400
Other current assets	100
Total current assets	5,600
Property and equipment	100
Total assets	5,700
Payroll and employee benefits	300
Accrued expenses	3,400
Current portion of long-term obligations	800
Total current liabilities	4,500
Other long-term obligations	0
Total liabilities	$ 4,500
Revenue Benchmark [Member] | Product Concentration Risk [Member] | Medicare Revenue [Member]
Organization And Nature Of Operations [Line Items]
Percent of net services revenue provided by Medicare	75.00%	75.00%	74.00%
Home Health [Member]
Organization And Nature Of Operations [Line Items]
Number of owned and operated care centers | care_center	331
Hospice [Member]
Organization And Nature Of Operations [Line Items]
Number of owned and operated care centers | care_center	175
Personal Care [Member]
Organization And Nature Of Operations [Line Items]
Number of owned and operated care centers | care_center	14
High Acuity Care [Member]
Organization And Nature Of Operations [Line Items]
Number Of Joint Ventures | numberOfJointVentures	8
Heritage Healthcare Innovation Fund LP [Member]
Organization And Nature Of Operations [Line Items]
Gain (loss) on equity method investments		$ 3,000
Medalogix [Member]
Organization And Nature Of Operations [Line Items]
Gain (loss) on equity method investments	$ 31,100
ConnectRN [Member]
Organization And Nature Of Operations [Line Items]
Purchase of investment	$ 5,000