Lease Accounting - Additional Information (Detail)	3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) Lease Land	Sep. 30, 2023 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Leases Disclosure [Line Items]
Lessee in connection with ground leases for land | Land					15
Right-of-use land assets	$ 10,925,000				$ 10,925,000			$ 10,946,000
Ground lease liabilities	10,925,000				10,925,000			10,946,000
Specialty Hospital In Chicago, Illinois | Chicago, Illinois
Leases Disclosure [Line Items]
Lease Demolition Cost								1,500,000
Other operating expenses demolition costs			$ 332,000	$ 1,100,000
Aiken Regional Medical Center and Canyon Creek Behavioral Health
Leases Disclosure [Line Items]
Monthly lease rent receivable	5,900,000				5,900,000				$ 5,900,000
Lease payments expected	1,400,000	$ 1,400,000			4,100,000	$ 4,100,000
Aiken Regional Medical Center and Canyon Creek Behavioral Health | Forecast
Leases Disclosure [Line Items]
Lease payments expected							$ 5,400,000
Aiken Regional Medical Center
Leases Disclosure [Line Items]
Monthly lease rent receivable	4,100,000				4,100,000				4,100,000
Canyon Creek Behavioral Health
Leases Disclosure [Line Items]
Monthly lease rent receivable	1,800,000				1,800,000				$ 1,800,000
Universal Health Services, Inc
Leases Disclosure [Line Items]
Financing receivable	$ 82,900,000				$ 82,900,000			$ 83,300,000
Universal Health Services, Inc | Wellington Regional Medical Center | Palm Beach, Florida
Leases Disclosure [Line Items]
Monthly lease rent receivable										$ 6,600,000
Financing Arrangements
Leases Disclosure [Line Items]
Number of lease property | Lease					2