NOVEL CORONAVIRUS PANDEMIC "COVID-19" (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended		15 Months Ended
	Apr. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021	Mar. 27, 2020
NOVEL CORONAVIRUS PANDEMIC "COVID-19" [Line Items]
Funding for Healthcare Providers, Including Hospitals									$ 175,000,000
Funding Immediately Distributed to Healthcare Providers Based on Their 2019 Medicare Fee-For-Service Reimbursements									$ 30,000,000
Funding Received From CARES Act	$ 100,000
Provider relief fund advance		$ 58,328		$ 58,328			$ 60,000	$ 58,328
CARES Act Provider Relief Funds Utilized		4,000						46,600
Estimated CARES Act Provider Relief Fund Amounts to be Repaid		58,300		58,300				58,300
CARES Act Provider Relief Funds Received by Unconsolidated Joint Ventures		1,900		1,900				1,900
Total CARES Act Provider Relief Funds Received		106,800		106,800				106,800
Payroll and employee benefits		147,017		147,017			146,929	147,017
Other long-term obligations		31,886		31,886			33,622	31,886
Subsequent Event
NOVEL CORONAVIRUS PANDEMIC "COVID-19" [Line Items]
Extension of Temporary Suspension of Sequestration, Revenue Impact						$ 36,000
COVID-19 Deferral of Social Security
NOVEL CORONAVIRUS PANDEMIC "COVID-19" [Line Items]
CARES Act Deferral of Employer Share Social Security Tax							55,000
Payroll and employee benefits		28,000		28,000				28,000
Other long-term obligations		28,000		28,000				$ 28,000
Home Health and Hospice [Member]
NOVEL CORONAVIRUS PANDEMIC "COVID-19" [Line Items]
COVID-19 Expenses Incurred		$ 5,000	$ 21,000	$ 13,000	$ 22,000
Personal Care [Member]
NOVEL CORONAVIRUS PANDEMIC "COVID-19" [Line Items]
Funding Received From Mass Home Care ASAP COVID-19 Provider Sustainability Program							$ 1,000
AseraCare Hospice [Member]
NOVEL CORONAVIRUS PANDEMIC "COVID-19" [Line Items]
Funding Received From CARES Act	6,000
Equity Method Investments [Member]
NOVEL CORONAVIRUS PANDEMIC "COVID-19" [Line Items]
Funding Received From CARES Act	$ 2,000