COMMITMENTS AND CONTINGENCIES (Details)	3 Months Ended			9 Months Ended
	Sep. 30, 2020 USD ($) review	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020 USD ($) review	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Number of independent operating subsidiaries | review	5			5
General and professional liability, retention limit	$ 250,000			$ 250,000
Workers' compensation, retention limit	$ 150,000			$ 150,000
Revenue | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk, percent	100.00%		100.00%	100.00%	100.00%
Medicare and medicaid | Receivables | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk, percent	76.30%	74.30%
Medicare and medicaid | Revenue | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk, percent	60.40%		56.80%	59.30%	55.10%