Relationship with Universal Health Realty Income Trust and Other Related Party Transactions - Additional Information 3 (Detail)	1 Months Ended	3 Months Ended			9 Months Ended
	Oct. 31, 2024 USD ($)	Sep. 30, 2024 USD ($) Facility	Sep. 30, 2023 USD ($) SquareFoot	Mar. 31, 2023 USD ($) Bed SquareFoot	Sep. 30, 2024 USD ($) Facility	Sep. 30, 2023 USD ($)
Related Party Transaction [Line Items]
Lease and rental expense		$ 36,540,000	$ 35,466,000		$ 108,165,000	$ 105,775,000
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%	68.00%
Lease and rental expense		$ 5,000,000	$ 5,000,000		$ 16,000,000	$ 15,000,000
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	$ 979,000
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	$ 1,300,000
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 | 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%