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SIGNIFICANT ACCOUNTING POLICIES - Schedule of Service Fee Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue from External Customer [Line Items]
Revenue	$ 459,714	$ 403,715	$ 891,421	$ 794,279
Imaging Center Segment Revenue
Revenue from External Customer [Line Items]
Revenue	443,886	392,112	860,933	771,599
Commercial insurance
Revenue from External Customer [Line Items]
Revenue	256,517	220,618	497,145	433,673
Medicare
Revenue from External Customer [Line Items]
Revenue	101,719	87,787	195,186	172,757
Medicaid
Revenue from External Customer [Line Items]
Revenue	11,001	9,798	21,906	19,763
Workers' compensation/personal injury
Revenue from External Customer [Line Items]
Revenue	10,997	12,580	22,837	25,017
Other patient revenue
Revenue from External Customer [Line Items]
Revenue	12,432	10,196	23,897	19,751
Management fee revenue
Revenue from External Customer [Line Items]
Revenue	6,106	4,033	12,014	8,281
Heart and lung
Revenue from External Customer [Line Items]
Revenue	3,936	2,123	7,857	3,936
Other
Revenue from External Customer [Line Items]
Revenue	4,209	5,180	8,604	10,480
Revenue under capitation arrangements
Revenue from External Customer [Line Items]
Revenue	36,969	39,797	71,487	77,941
Digital Health
Revenue from External Customer [Line Items]
Revenue	15,828	11,603	30,488	22,680
Service Revenue
Revenue from External Customer [Line Items]
Revenue	$ 459,714	$ 403,715	$ 891,421	$ 794,279

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