Relationship with Universal Health Realty Income Trust and Other Related Party Transactions - Additional Information 3 (Detail) $ in Thousands	1 Months Ended	3 Months Ended				6 Months Ended
	Oct. 31, 2024 USD ($)	Jun. 30, 2025 USD ($) Facility	Jun. 30, 2024 USD ($)	Sep. 30, 2023 USD ($) SquareFoot	Mar. 31, 2023 Bed SquareFoot	Jun. 30, 2025 USD ($) Facility	Jun. 30, 2024 USD ($)
Related Party Transaction [Line Items]
Lease and rental expense		$ 35,240	$ 36,175			$ 72,053	$ 71,625
Relationship with Universal Health Realty Income Trust
Related Party Transaction [Line Items]
Number of free-standing emergency departments to be acquired | Facility		2				2
Number of square feet to be acquired | SquareFoot				79,500
Percentage of master lease rentable square feet				100.00%
Lease and rental expense		$ 5,000	$ 5,000			$ 11,000	$ 11,000
Number of square feet to be constructed | SquareFoot					86,000
Number of beds available in acute care hospital | Bed					170
Two Free-standing Emergency Departments
Related Party Transaction [Line Items]
Renewal options term at fair market lease rates	5 years
Lease expiration date	Jan. 31, 2025
Lease and rental expense	$ 1,070
Percentage of annual rental increase on cumulative and compound basis	2.00%
Two Free-standing Emergency Departments | First Three Renewal Options
Related Party Transaction [Line Items]
Percentage of annual rental increase on cumulative and compound basis	2.00%
Minimum | Relationship with Universal Health Realty Income Trust
Related Party Transaction [Line Items]
Lease and rental expense				$ 624,000,000
Minimum | Two Free-standing Emergency Departments
Related Party Transaction [Line Items]
Operating leases additional renewal options at fair market value lease rates expiration date	Feb. 01, 2025
Minimum | Two Free-standing Emergency Departments | First Three Renewal Options
Related Party Transaction [Line Items]
Operating leases additional renewal options at fair market value lease rates expiration year						2030
Minimum | Two Free-standing Emergency Departments | Remaining Two Renewal Options
Related Party Transaction [Line Items]
Operating leases additional renewal options at fair market value lease rates expiration year						2045
Maximum | Relationship with Universal Health Realty Income Trust
Related Party Transaction [Line Items]
Percentage of master lease rentable square feet					68.00%
Maximum | Two Free-standing Emergency Departments
Related Party Transaction [Line Items]
Operating leases additional renewal options at fair market value lease rates expiration date	Jan. 31, 2030
Maximum | Two Free-standing Emergency Departments | First Three Renewal Options
Related Party Transaction [Line Items]
Operating leases additional renewal options at fair market value lease rates expiration year						2044
Maximum | Two Free-standing Emergency Departments | Remaining Two Renewal Options
Related Party Transaction [Line Items]
Operating leases additional renewal options at fair market value lease rates expiration year						2054
Limited Liability Companies | Minimum | Relationship with Universal Health Realty Income Trust
Related Party Transaction [Line Items]
Non-controlling ownership interests		95.00%				95.00%
Limited Liability Companies | Maximum | Relationship with Universal Health Realty Income Trust
Related Party Transaction [Line Items]
Non-controlling ownership interests		100.00%				100.00%