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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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