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Accounts Receivable and Net Revenue - Schedule of Net Patient Service Revenue by Type of Payor (Detail) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of net patient service revenue | 100.00% | 100.00% | 100.00% | 100.00%
Contracted Managed Care |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of net patient service revenue | 72.00% | 67.00% | 71.00% | 67.00%
Government |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of net patient service revenue | 23.00% | 25.00% | 24.00% | 25.00%
Other Third-Parties |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of net patient service revenue | 4.00% | 5.00% | 3.00% | 6.00%
Private-Pay Patients |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of net patient service revenue | 1.00% | 3.00% | 2.00% | 2.00%

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