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Accounts Receivable and Net Revenue - Schedule of Net Revenue (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Disaggregation of Revenue [Abstract] |  |  |  |
Net revenue | $ 511,158 | $ 506,612 | $ 1,510,555 | $ 1,498,197
Net patient service revenue |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net revenue | 438,675 | 437,321 | 1,293,353 | 1,290,888
Hospital contract administrative fees |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net revenue | 72,413 | 68,712 | 215,129 | 204,286
Other revenue |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net revenue | $ 70 | $ 579 | $ 2,073 | $ 3,023

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