COVID-19 PANDEMIC (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Unusual or Infrequent Items, or Both [Abstract]
COVID-19, PHSSEF funds received	$ 42,274		$ 42,274
Other operating income	9,563	$ 0	14,711	$ 0
Proceeds from stimulus funds used to purchase property and equipment			898	$ 0
COVID-19, remaining stimulus funds	27,157		27,157
COVID-19, medicaid funds received	6,645		11,709
Payroll and employee benefits, less current portion	3,185		3,185
COVID-19, medicaid sequestration amount	724		1,031
COVID-19, salaries expense	6,595		9,376
COVID-19, supplies expense	5,801		7,237
COVID-19, travel expense	$ 276		$ 379