Real Estate and Other Activities - 2023 Activity - Additional Information (Detail) $ in Thousands, £ in Millions					1 Months Ended	3 Months Ended						6 Months Ended	12 Months Ended
	May 23, 2023 USD ($)	Apr. 14, 2023 USD ($) Facility	Apr. 14, 2023 GBP (£) Facility	Feb. 07, 2023 USD ($) Facility	Aug. 31, 2019 USD ($) Hospital	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Jun. 30, 2023 USD ($) Facility	Jun. 30, 2023 GBP (£) Facility	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2022 USD ($)
Business Acquisition [Line Items]
Net impairment charge						$ 500,000	$ 225,000			$ 79,000
Additional mortgage loan						105,618		$ 235,187				$ 105,618
PHP Holdings [Member]
Business Acquisition [Line Items]
Capital restructuring costs												654,000
Equity investment						68,000						68,000
Convertible loan						$ 586,000						$ 586,000
Massachusetts [Member]
Business Acquisition [Line Items]
Advancement of redevelopment recovery receivables										50,000
Prospect [Member]
Business Acquisition [Line Items]
Purchase price of acquisition					$ 1,500,000
Term loan					$ 112,900
Net impairment charge											$ 280,000
Additional mortgage loan														$ 100,000
Investment, Type [Extensible Enumeration]						Mortgage Loans [Member]						Mortgage Loans [Member]
Pay down of debt instruments	$ 375,000
Reconstitution of asset	1,700,000
Prospect [Member] | Maximum [Member]
Business Acquisition [Line Items]
First lien secured loan	75,000
Prospect [Member] | Acute Care Campus [Member]
Business Acquisition [Line Items]
Number of facilities acquired | Hospital					14
Prospect [Member] | Mortgage Loans [Member]
Business Acquisition [Line Items]
First lien secured loan	150,000
Prospect [Member] | PHP Holdings [Member]
Business Acquisition [Line Items]
Revenue for rent and interest													$ 82,000
Unpaid rent and interest	112,900
Convertible loan										$ 50,000
Prospect [Member] | PHP Holdings [Member] | Mortgage Loans [Member]
Business Acquisition [Line Items]
Unpaid rent and interest	$ 151,000
Prospect [Member] | Pennsylvania [Member]
Business Acquisition [Line Items]
Carrying value of lease requiring residual value guarantee											170,000
Unbilled rent accruals						$ 112,000						$ 112,000
Prospect [Member] | Pennsylvania [Member] | Maximum [Member]
Business Acquisition [Line Items]
Carrying value of lease requiring residual value guarantee											$ 250,000
General Acute Care Hospitals [Member]
Business Acquisition [Line Items]
Number of facilities acquired | Facility				8
Lease extension expiration term				5 years
Lease extension expiration year				2041
Behavioral Health Hospitals [Member]
Business Acquisition [Line Items]
Number of facilities acquired | Facility		5	5					3	3
Payment for acquisition		$ 58,000	£ 44					$ 77,000	£ 70
Number of leased facilities | Facility		5	5
Springstone Health Opco, LLC [Member]
Business Acquisition [Line Items]
Purchase price of acquisition				$ 250,000
Sale of minority equity investment							$ 12,000
Additional mortgage loan				$ 205,000