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Relationship with Universal Health Realty Income Trust and Other Related Party Transactions - Additional Information 1 (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2023 Bed | Dec. 31, 2021 USD ($) Bed
Relationship with Universal Health Realty Income Trust | Behavioral Health Care Facility |  |
Related Party Transaction [Line Items] |  |
Number of bed available in behavioral health care facility | Bed | 100 |
Asset Purchase and Sale Agreement | Subsidiaries |  |
Related Party Transaction [Line Items] |  |
Gain on sale of real estate assets |  | $ 4.0
Asset Purchase and Sale Agreement | Relationship with Universal Health Realty Income Trust | Subsidiaries |  |
Related Party Transaction [Line Items] |  |
Cash received for sale of real estate asset |  | 4.1
Gain on sale of real estate assets |  | 68.4
Aiken Regional Medical Center and Canyon Creek Behavioral Health | Asset Purchase and Sale Agreement | Relationship with Universal Health Realty Income Trust | Subsidiaries |  |
Related Party Transaction [Line Items] |  |
Fair market value of real estate assets sold |  | 83.7
Wildomar, California | Inland Valley Campus of Southwest Healthcare System | Asset Purchase and Sale Agreement | Relationship with Universal Health Realty Income Trust | Subsidiaries |  |
Related Party Transaction [Line Items] |  |
Fair market value of real estate assets received |  | 79.6
Aiken South Carolina | Aiken Regional Medical Center | Asset Purchase and Sale Agreement | Relationship with Universal Health Realty Income Trust | Subsidiaries |  |
Related Party Transaction [Line Items] |  |
Fair market value of real estate assets sold |  | $ 57.7
Aiken South Carolina | Aiken Regional Medical Center | Asset Purchase and Sale Agreement | Relationship with Universal Health Realty Income Trust | Subsidiaries | Acute Care Hospital Services |  |
Related Party Transaction [Line Items] |  |
Number of beds available in acute care hospital | Bed |  | 211
Aiken South Carolina | Aiken Regional Medical Center | Asset Purchase and Sale Agreement | Relationship with Universal Health Realty Income Trust | Subsidiaries | Behavioral Health Care Facility |  |
Related Party Transaction [Line Items] |  |
Number of bed available in behavioral health care facility | Bed |  | 62
Temple, Texas | Canyon Creek Behavioral Health | Asset Purchase and Sale Agreement | Relationship with Universal Health Realty Income Trust | Subsidiaries |  |
Related Party Transaction [Line Items] |  |
Fair market value of real estate assets sold |  | $ 26.0

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