COMMITMENTS AND CONTINGENCIES (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) lawsuit	Mar. 31, 2020 USD ($)	Sep. 30, 2020 USD ($) lawsuit	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Malpractice Insurance [Line Items]
Number of professional liability lawsuits | lawsuit	82		82
Cash expenditures for self-insured professional liability costs			$ 5,136,000	$ 5,398,000
Other Insurance
Liability for workers compensation claims	$ 520,000		520,000		$ 921,000
Workers compensation insurance, non current receivable for excess premiums paid	2,101,000		$ 2,101,000		1,575,000
Civil Investigative Demand
Malpractice Insurance [Line Items]
Settlement agreement, term			5 years
Settlement payment period			5 years
Payments made during period		$ 500,000
Current loss accrual	1,000,000		$ 1,000,000
Noncurrent loss accrual	8,000,000		8,000,000
Self Insurance Receivable, Current
Malpractice Insurance [Line Items]
Estimated insurance recovery receivables	686,000		686,000		1,011,000
Other Noncurrent Assets
Malpractice Insurance [Line Items]
Estimated insurance recovery receivables	$ 155,000		$ 155,000		1,555,000
Scheduled for trial or arbitration over next 12 months
Malpractice Insurance [Line Items]
Number of professional liability lawsuits | lawsuit	22		22
Professional malpractice liability insurance
Malpractice Insurance [Line Items]
Liability for reported and estimated future claims	$ 25,584,000		$ 25,584,000		27,390,000
Prefunded deductible policy
Malpractice Insurance [Line Items]
Insurance policy coverage limits per claim	500,000
Other Insurance
Insurance policy coverage limits per claim	500,000
Professional liability insurance, annual coverage limit per facility	3,000,000
Health insurance, maximum self-insured annual amount per individual	200,000		200,000
Liability for reported claims and estimates for incurred but unreported claims	$ 2,487,000		2,487,000		$ 1,810,000
SHC Risk Carriers, Inc | Professional malpractice liability insurance
Malpractice Insurance [Line Items]
Insurance policy coverage limits per claim			1,000,000
Malpractice insurance annual sublimit per center			3,000,000
Aggregate policy limit			5,000,000
Other Insurance
Insurance policy coverage limits per claim			$ 1,000,000