NOVEL CORONAVIRUS PANDEMIC ("COVID-19") (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Apr. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Oct. 01, 2020	Apr. 24, 2020	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
CARES Act Deferral Of Employer Share Social Security Tax		$ 55,400
Payroll and employee benefits		146,929	$ 120,877
Other long-term obligations		33,622	5,905
Additional Funding Distributed To Healthcare Providers					$ 20,000,000	$ 18,000,000
CARES Act Provider Relief Funds Utilized		33,300
Estimated CARES Act Provider Relief Funds Expected To Be Utilized		11,600
Estimated CARES Act Provider Relief Fund Amounts to be Repaid		60,000
CARES Act Provider Relief Funds Received by Unconsolidated Joint Ventures		1,900
Total CARES Act Provider Relief Funds Received		106,800
Provider relief fund advance		60,000	0
Estimated Future COVID19 Related Expenses		12,000
Other operating income		34,372	$ 0	$ 0
COVID-19 Deferral of Social Security Taxes [Member]
NOVEL CORONAVIRUS PANDEMIC ("COVID-19") [Line Items]
CARES Act Deferral Of Employer Share Social Security Tax		55,000
Payroll and employee benefits		28,000
Other long-term obligations		28,000
Home Health And Hospice [Member]
NOVEL CORONAVIRUS PANDEMIC ("COVID-19") [Line Items]
COVID19 Expenses Incurred		33,000
Personal Care [Member]
NOVEL CORONAVIRUS PANDEMIC ("COVID-19") [Line Items]
Funding Received From Mass HomeCare ASAP COVID19 Provider Sustainability Program		1,000
Other operating income		$ 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