Relationship with Universal Health Realty Income Trust and Other Related Party Transactions - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Net revenues	$ 4,099,720,000	$ 3,843,582,000
Acute Care Hospital Services
Related Party Transaction [Line Items]
Net revenues	$ 2,349,229,000	2,185,081,000
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	$ 300,000	300,000
Dividends received from the Trust	579,000	571,000
Carrying value of investment in Trust	5,400,000		$ 5,800,000
Market value of investment in Trust	$ 32,300,000		$ 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%
Relationship with Universal Health Realty Income Trust | Advisory Fee
Related Party Transaction [Line Items]
Net revenues	$ 1,400,000	$ 1,300,000