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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Service Fee Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Revenue from External Customer [Line Items] |  |  |
Total consolidated revenues | $ 1,829,664 | $ 1,616,630 | $ 1,430,061
Commercial insurance |  |  |
Revenue from External Customer [Line Items] |  |  |
Total consolidated revenues | 1,018,327 | 879,792 | 769,753
Medicare |  |  |
Revenue from External Customer [Line Items] |  |  |
Total consolidated revenues | 410,072 | 356,506 | 305,031
Medicaid |  |  |
Revenue from External Customer [Line Items] |  |  |
Total consolidated revenues | 44,736 | 42,302 | 37,530
Workers' compensation/personal injury |  |  |
Revenue from External Customer [Line Items] |  |  |
Total consolidated revenues | 43,666 | 46,406 | 50,333
Other payors |  |  |
Revenue from External Customer [Line Items] |  |  |
Total consolidated revenues | 104,888 | 87,675 | 65,911
Management fee revenue |  |  |
Revenue from External Customer [Line Items] |  |  |
Total consolidated revenues | 24,676 | 17,936 | 22,235
Other revenue |  |  |
Revenue from External Customer [Line Items] |  |  |
Total consolidated revenues | 46,724 | 32,580 | 27,223
Revenue under capitation arrangements |  |  |
Revenue from External Customer [Line Items] |  |  |
Total consolidated revenues | $ 136,575 | $ 153,433 | $ 152,045

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