Relationship with Universal Health Realty Income Trust and Other Related Party Transactions - Additional Information 1 (Detail) - Relationship with Universal Health Realty Income Trust $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024 Bed	Mar. 31, 2023 Bed	Dec. 31, 2021 USD ($) Bed
Related Party Transaction [Line Items]
Number of beds available in acute care hospital		170
Behavioral Health Care Facility
Related Party Transaction [Line Items]
Number of bed available in behavioral health care facility	100
Asset Purchase and Sale Agreement | Subsidiaries
Related Party Transaction [Line Items]
Cash received for sale of real estate asset | $			$ 4.1
Aiken South Carolina | Aiken Regional Medical Center | Asset Purchase and Sale Agreement | Subsidiaries | Acute Care Hospital Services
Related Party Transaction [Line Items]
Number of beds available in acute care hospital			211
Aiken South Carolina | Aiken Regional Medical Center | Asset Purchase and Sale Agreement | Subsidiaries | Behavioral Health Care Facility
Related Party Transaction [Line Items]
Number of bed available in behavioral health care facility			62