NATURE OF OPERATIONS, CONSOLIDATION AND PRESENTATION OF FINANCIAL STATEMENTS - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) care_center numberOfJointVentures state	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of states with facilities | state	38
Minimum ownership percentage for controlling interest (percent)	50.00%
Maximum ownership percentage for equity method investment (percent)	50.00%
Equity method investment, aggregate cost	$ 45,000		$ 48,100
Maximum ownership percentage for cost method investment (percent)	20.00%
Payments to Acquire Other Investments	$ 15,000	$ 0
Investment Owned, at Cost	20,000		5,000
Cash and cash equivalents	67,834		42,694
Patient accounts receivable	293,579		274,961
Other current assets	10,776		25,598
Total current assets	392,485		356,684
Property and equipment	17,295		18,435
Goodwill	1,204,638		1,196,090
Intangible assets	106,534		111,190
Total assets	1,908,392		1,856,968
Payroll and employee benefits	151,279		141,001
Accrued expenses	148,044		150,836
Current portion of long-term obligations	12,309		12,995
Total current liabilities	380,154		374,282
Other long-term obligations	4,923		4,979
Total liabilities	887,740		880,645
Variable Interest Entity, Primary Beneficiary
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Cash and cash equivalents	10,700		3,100
Patient accounts receivable	2,800		2,400
Other current assets	100		100
Total current assets	13,600		5,600
Property and equipment	100		100
Goodwill	8,500		0
Intangible assets	400		0
Total assets	22,600		5,700
Payroll and employee benefits	500		300
Accrued expenses	3,500		3,400
Current portion of long-term obligations	200		800
Total current liabilities	4,200		4,500
Other long-term obligations	0		0
Total liabilities	$ 4,200		$ 4,500
Home Health [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of owned and operated care centers | care_center	333
Hospice [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of owned and operated care centers | care_center	175
Personal Care [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of owned and operated care centers | care_center	14
High Acuity Care
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of Joint Ventures | numberOfJointVentures	9
Revenue from Contract with Customer [Member] | Product Concentration Risk | Medicare Revenue [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Percent of net services revenue	75.00%	75.00%