REVENUE RECOGNITION AND ACCOUNTS RECEIVABLE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 30, 2020	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenues		$ 119,987	$ 117,550
Total revenues, as a percent		100.00%	100.00%
Medicaid
Disaggregation of Revenue [Line Items]
Total revenues		$ 54,330	$ 53,811
Total revenues, as a percent		45.30%	45.80%
Medicare
Disaggregation of Revenue [Line Items]
Total revenues		$ 20,672	$ 20,391
Total revenues, as a percent		17.20%	17.30%
Managed Care
Disaggregation of Revenue [Line Items]
Total revenues		$ 12,596	$ 12,998
Total revenues, as a percent		10.50%	11.10%
Private Pay and other
Disaggregation of Revenue [Line Items]
Total revenues		$ 32,389	$ 30,350
Total revenues, as a percent		27.00%	25.80%
Subsequent Event
Disaggregation of Revenue [Line Items]
CARES, Medicare related to rate received	$ 900