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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
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