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Relationship with Universal Health Realty Income Trust and Other Related Party Transactions - Additional Information (Detail) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Related Party Transaction [Line Items]              
Net revenues $ 4,283,816,000 $ 3,907,604,000 $ 8,383,536,000 $ 7,751,186,000      
Acute Care Hospital Services              
Related Party Transaction [Line Items]              
Net revenues 2,401,034,000 2,178,686,000 $ 4,750,263,000 4,363,767,000      
Relationship with Universal Health Realty Income Trust              
Related Party Transaction [Line Items]              
Percentage of advisory fee on average invested real estate assets     0.70%   0.70% 0.70% 0.70%
Pre-tax share of income from the Trust 268,000 314,000 $ 568,000 614,000      
Dividends received from the Trust 583,000 575,000 1,200,000 1,100,000      
Carrying value of investment in Trust 5,200,000   5,200,000   $ 5,800,000    
Market value of investment in Trust $ 31,500,000   $ 31,500,000   $ 29,300,000    
Relationship with Universal Health Realty Income Trust | Other Related Party Transactions              
Related Party Transaction [Line Items]              
Trust outstanding shares held, percentage 5.70%   5.70%        
Relationship with Universal Health Realty Income Trust | Advisory Fee              
Related Party Transaction [Line Items]              
Net revenues $ 1,400,000 $ 1,400,000 $ 2,800,000 $ 2,700,000