SIGNIFICANT ACCOUNTING POLICIES - Schedule of Service Fee Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total service revenue	$ 622,720	$ 498,230	$ 1,198,351	$ 969,629
Commercial insurance
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total service revenue	339,401	278,902	655,367	541,410
Medicare
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total service revenue	150,821	116,331	287,923	224,499
Medicaid
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total service revenue	14,452	12,597	28,468	24,283
Workers' compensation/personal injury
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total service revenue	13,533	10,642	25,830	21,114
Other payors
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total service revenue	36,831	29,394	70,383	57,087
Management fee revenue
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total service revenue	7,858	6,688	15,339	12,967
Other revenue
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total service revenue	29,693	13,509	54,497	26,052
Revenue under capitation arrangements
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total service revenue	$ 30,131	$ 30,167	$ 60,544	$ 62,217