DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS - Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other current assets:
Payroll tax escrow	$ 7,900	$ 6,300
Income tax receivable	8,200	200
Due from joint ventures	3,900	2,300
Other	5,600	4,500
Other current assets	25,598	13,265
Other assets:
Workers’ compensation deposits	300	300
Health insurance deposits	900	500
Other miscellaneous deposits	1,100	1,200
Indemnity receivable	13,600	13,600
Equity method investments	53,100	14,200
Other	4,000	3,400
Other assets	73,023	33,200
Accrued expenses:
Health insurance	17,500	15,100
Workers’ compensation	40,300	35,800
Florida ZPIC audit, gross liability	17,400	17,400
Legal settlements and other audits	27,500	24,400
Charity care	1,400	3,600
Estimated Medicare cap liability	4,500	9,300
Hospice accruals (room and board, general in-patient and other)	23,600	29,200
Patient liability	4,600	8,400
Deferred operating income (CARES Act)	0	11,600
Other	14,000	11,400
Accrued expenses	150,836	166,192
Other long-term obligations:
Reserve for uncertain tax positions	3,400	3,300
Deferred compensation plan liability	1,000	1,000
Non-current social security taxes (deferred under CARES Act)	0	27,700
Other	600	1,600
Other long-term obligations	$ 4,979	$ 33,622