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Number of freestanding emergency departments to be acquired in business acquisition.

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Number of square feet to be acquired in edical office building.

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Number of square feet to be constructed in medical office building.

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Operating leases additional renewal options at fair market value lease rates expiration date.

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Operating leases additional renewal options at fair market value lease rates expiration year.

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Operating leases, renewal options term at fair market value lease rates.

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Percentage of annual rental increase on cumulative and compound basis.

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Percentage of master lease rentable square feet of medical office building.

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Amount of operating lease expense. Excludes sublease income.

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Relationship with Universal Health Realty Income Trust and Other Related Party Transactions - Additional Information 3 (Detail) $ in Thousands	1 Months Ended		3 Months Ended				9 Months Ended
	Oct. 31, 2025 SquareFoot	Oct. 31, 2024 USD ($)	Sep. 30, 2025 USD ($) Facility	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($) SquareFoot	Mar. 31, 2023 Bed SquareFoot	Sep. 30, 2025 USD ($) Facility	Sep. 30, 2024 USD ($)
Related Party Transaction [Line Items]
Lease and rental expense			$ 37,295	$ 36,540			$ 109,348	$ 108,165
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			$ 16,000	$ 16,000
Number of square feet to be constructed \| SquareFoot						86,000
Number of beds available in acute care hospital \| Bed						170
Relationship with Universal Health Realty Income Trust \| Subsequent Event
Related Party Transaction [Line Items]
Number of square feet to be acquired \| SquareFoot	80,000
Lease initial terms	10 years
Percentage of master lease rentable square feet	75.00%
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
Related Party Transaction [Line Items]
Lease initial terms			5 years				5 years
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
Related Party Transaction [Line Items]
Lease initial terms			10 years				10 years
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%