NATURE OF OPERATIONS, CONSOLIDATION AND PRESENTATION OF FINANCIAL STATEMENTS - Narrative (Details) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2022 USD ($) care_center numberOfJointVentures state	Mar. 31, 2022 USD ($)	Jun. 30, 2021	Jun. 30, 2022 USD ($) care_center numberOfJointVentures state	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of states with facilities | state	38			38
Minimum ownership percentage for controlling interest (percent)	50.00%			50.00%
Maximum ownership percentage for equity method investment (percent)	50.00%			50.00%
Equity method investment, aggregate cost	$ 45,000			$ 45,000		$ 48,100
Maximum ownership percentage for cost method investment (percent)	20.00%			20.00%
Payments to Acquire Other Investments		$ 15,000		$ 15,000	$ 0
Investment Owned, at Cost	$ 20,000			20,000		5,000
Cash and cash equivalents	26,566			26,566		42,694
Patient accounts receivable	305,413			305,413		274,961
Other current assets	25,493			25,493		25,598
Total current assets	394,869			394,869		356,684
Property and equipment	17,847			17,847		18,435
Goodwill	1,289,672			1,289,672		1,196,090
Intangible assets	106,189			106,189		111,190
Total assets	2,000,986			2,000,986		1,856,968
Payroll and employee benefits	161,068			161,068		141,001
Accrued expenses	176,239			176,239		150,836
Current portion of long-term obligations	12,521			12,521		12,995
Total current liabilities	427,372			427,372		374,282
Other long-term obligations	13,408			13,408		4,979
Total liabilities	961,991			961,991		880,645
Gain on equity method investments				0	31,092
Medalogix [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Gain on equity method investments					$ 31,100
Variable Interest Entity, Primary Beneficiary
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Cash and cash equivalents	10,400			10,400		3,100
Patient accounts receivable	4,100			4,100		2,400
Other current assets	400			400		100
Total current assets	14,900			14,900		5,600
Property and equipment	200			200		100
Goodwill	8,500			8,500		0
Intangible assets	400			400		0
Total assets	24,000			24,000		5,700
Payroll and employee benefits	700			700		300
Accrued expenses	4,800			4,800		3,400
Current portion of long-term obligations	200			200		800
Total current liabilities	5,700			5,700		4,500
Other long-term obligations	0			0		0
Total liabilities	$ 5,700			$ 5,700		$ 4,500
Home Health [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of owned and operated care centers | care_center	353			353
Hospice [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of owned and operated care centers | care_center	174			174
Personal Care [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of owned and operated care centers | care_center	14			14
High Acuity Care
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of Joint Ventures | numberOfJointVentures	9			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	74.00%		75.00%	74.00%	75.00%