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Relationship with Universal Health Realty Income Trust and Other Related Party Transactions - Additional Information 1 (Detail) - Relationship with Universal Health Realty Income Trust $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 Bed | Mar. 31, 2023 Bed | Dec. 31, 2021 USD ($) Bed
Related Party Transaction [Line Items] |  |  |
Number of beds available in acute care hospital |  | 170 |
Behavioral Health Care Facility |  |  |
Related Party Transaction [Line Items] |  |  |
Number of bed available in behavioral health care facility | 100 |  |
Asset Purchase and Sale Agreement | Subsidiaries |  |  |
Related Party Transaction [Line Items] |  |  |
Cash received for sale of real estate asset | $ |  |  | $ 4.1
Aiken South Carolina | Aiken Regional Medical Center | Asset Purchase and Sale Agreement | Subsidiaries | Acute Care Hospital Services |  |  |
Related Party Transaction [Line Items] |  |  |
Number of beds available in acute care hospital |  |  | 211
Aiken South Carolina | Aiken Regional Medical Center | Asset Purchase and Sale Agreement | Subsidiaries | Behavioral Health Care Facility |  |  |
Related Party Transaction [Line Items] |  |  |
Number of bed available in behavioral health care facility |  |  | 62

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