DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS - Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other current assets:
Payroll tax escrow	$ 6,300	$ 1,500
Income tax receivable	200	2,000
Due from joint ventures	2,300	2,000
Other	4,500	2,700
Other current assets	13,265	8,225
Other assets:
Workers’ compensation deposits	300	200
Health insurance deposits	500	500
Other miscellaneous deposits	1,200	1,000
Indemnity receivable	13,600	13,600
Equity method investments	14,200	35,700
Other	3,400	3,600
Other assets	33,200	54,612
Accrued expenses:
Health insurance	15,100	15,800
Workers’ compensation	35,800	33,400
Florida ZPIC audit, gross liability	17,400	17,400
Legal settlements and other audits	24,400	19,000
Income tax payable	0	500
Charity care	3,600	2,700
Estimated Medicare cap liability	9,300	5,700
Hospice accruals (room and board, general in-patient and other)	29,200	24,400
Patient liability	8,400	9,400
Deferred operating income (CARES Act)	11,600	0
Other	11,400	8,800
Accrued expenses	166,192	137,111
Other long-term obligations:
Reserve for uncertain tax positions	3,300	3,100
Deferred compensation plan liability	1,000	1,000
Non-current social security taxes (deferred under CARES Act)	27,700	0
Other	1,600	1,800
Other long-term obligations	$ 33,622	$ 5,905