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SIGNIFICANT ACCOUNTING POLICIES - Schedule of Service Fee Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue from External Customer [Line Items]
Revenue	$ 461,142	$ 401,968	$ 1,352,563	$ 1,196,247
Imaging Center Segment Revenue
Revenue from External Customer [Line Items]
Revenue	444,775	389,783	1,305,707	1,161,381
Commercial insurance
Revenue from External Customer [Line Items]
Revenue	255,375	218,923	752,514	652,597
Medicare
Revenue from External Customer [Line Items]
Revenue	102,852	89,981	298,001	262,719
Medicaid
Revenue from External Customer [Line Items]
Revenue	10,894	10,519	32,804	30,279
Workers' compensation/personal injury
Revenue from External Customer [Line Items]
Revenue	10,232	9,745	33,088	34,785
Other patient revenue
Revenue from External Customer [Line Items]
Revenue	10,607	10,443	34,524	30,191
Management fee revenue
Revenue from External Customer [Line Items]
Revenue	6,242	3,922	18,255	12,203
Heart and lung
Revenue from External Customer [Line Items]
Revenue	4,696	2,441	12,553	6,377
Other
Revenue from External Customer [Line Items]
Revenue	10,314	3,768	18,918	14,248
Revenue under capitation arrangements
Revenue from External Customer [Line Items]
Revenue	33,563	40,041	105,050	117,982
Digital Health
Revenue from External Customer [Line Items]
Revenue	16,367	12,185	46,856	34,866
Service Revenue
Revenue from External Customer [Line Items]
Revenue	$ 461,142	$ 401,968	$ 1,352,563	$ 1,196,247

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