COVID-19 UPDATE (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Jul. 31, 2020	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Subsequent Events [Abstract]
Repayments of CARES Act Provider Relief Fund and Medicare Advance Payment Program(Note 3)	$ 108,756		$ 111,988	$ 0
Coronavirus Aid, Relief, and Economic Security (“CARES”) Funds Received		$ 23,296	132,052
Medicare Accelerated and Advance Payment			103,924
Repayment of Medicare Accelerated and Advance Payment Program	$ 3,232
Medicare Accelerated and Advance Payment, outstanding liability		100,692	100,692
FMAP payments received		17,344	32,455
Revenue, FMAP payments received		11,691	24,825
Deferred payment of social security taxes		$ 33,231	$ 33,231