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SIGNIFICANT ACCOUNTING POLICIES - Schedule of Service Fee Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue from External Customer [Line Items]
Revenue	$ 431,707	$ 390,564
Imaging Center Segment Revenue
Revenue from External Customer [Line Items]
Revenue	417,046	379,487
Commercial insurance
Revenue from External Customer [Line Items]
Revenue	240,628	213,061
Medicare
Revenue from External Customer [Line Items]
Revenue	93,525	84,970
Medicaid
Revenue from External Customer [Line Items]
Revenue	10,887	9,959
Workers' compensation/personal injury
Revenue from External Customer [Line Items]
Revenue	11,794	12,433
Other patient revenue
Revenue from External Customer [Line Items]
Revenue	11,470	9,559
Management fee revenue
Revenue from External Customer [Line Items]
Revenue	5,908	4,248
Heart and lung
Revenue from External Customer [Line Items]
Revenue	3,921	1,813
Other
Revenue from External Customer [Line Items]
Revenue	4,395	5,300
Revenue under capitation arrangements
Revenue from External Customer [Line Items]
Revenue	34,518	38,144
Digital Health
Revenue from External Customer [Line Items]
Revenue	14,661	11,077
Service Revenue
Revenue from External Customer [Line Items]
Revenue	$ 431,707	$ 390,564

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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