COMMITMENTS AND CONTINGENCIES (Details)	3 Months Ended		32 Months Ended
	Mar. 31, 2018 USD ($) lawsuit	Mar. 31, 2017 USD ($)	Feb. 29, 2016 civil_investigative_demand	Oct. 31, 2014 facility
Malpractice Insurance [Line Items]
Number of professional liability lawsuits | lawsuit	73
Cash expenditures for self-insured professional liability costs	$ 1,093,000	$ 2,071,000
Other Insurance
Liability for workers compensation claims	802,000
Workers compensation insurance, non current receivable for excess premiums paid	1,061,000
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	20,536,000
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	1,687,000
SHC Risk Carriers, Inc | Professional malpractice liability insurance
Malpractice Insurance [Line Items]
Insurance policy coverage limits per claim	500,000
Malpractice insurance annual sublimit per center	1,000,000
Aggregate policy limit	5,000,000
Other Insurance
Insurance policy coverage limits per claim	$ 500,000
Scheduled for trial or arbitration over next 12 months
Malpractice Insurance [Line Items]
Number of professional liability lawsuits | lawsuit	10