COMMITMENTS AND CONTINGENCIES (Details)	3 Months Ended		32 Months Ended
	Mar. 31, 2019 USD ($) lawsuit	Mar. 31, 2018 USD ($)	Feb. 29, 2016 civil_investigative_demand	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Oct. 31, 2014 facility
Malpractice Insurance [Line Items]
Number of professional liability lawsuits | lawsuit	78
Cash expenditures for self-insured professional liability costs	$ 1,906,000	$ 1,093,000
Estimated insurance recovery receivables	2,125,000
Litigation contingency	6,400,000			$ 6,400,000	$ 6,400,000
Other Insurance
Liability for workers compensation claims	688,000			618,000
Workers compensation insurance, non current receivable for excess premiums paid	1,458,000			1,258,000
Unfavorable regulatory action | Potential violations of false claims act
Malpractice Insurance [Line Items]
Number of facilities | facility						2
Number of civil investigative demands received | civil_investigative_demand			3
Professional malpractice liability insurance
Malpractice Insurance [Line Items]
Liability for reported and estimated future claims	24,625,000			$ 27,201,000
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
Liability for reported claims and estimates for incurred but unreported claims	1,444,000
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
Scheduled for trial or arbitration over next 12 months
Malpractice Insurance [Line Items]
Number of professional liability lawsuits | lawsuit	27