REVENUE - Net Revenue Earned by Category of Payer (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Net revenue	$ 1,093,014	$ 1,020,918	$ 3,177,934	$ 2,917,522
Commercial payers
Disaggregation of Revenue [Line Items]
Net revenue	957,601	888,162	2,765,513	2,526,354
Government payers
Disaggregation of Revenue [Line Items]
Net revenue	124,122	122,793	370,648	357,383
Patients
Disaggregation of Revenue [Line Items]
Net revenue	$ 11,291	$ 9,963	$ 41,773	$ 33,785