Real Estate and Other Activities - 2023 Activity - Additional Information (Detail) $ in Thousands, £ in Millions						1 Months Ended	3 Months Ended			12 Months Ended
	May 23, 2023 USD ($)	Apr. 14, 2023 GBP (£) Facility	Feb. 07, 2023 USD ($) Facility	Jul. 29, 2022 USD ($)	Apr. 25, 2022 USD ($) Facility	Aug. 31, 2019 USD ($) Hospital	Jun. 30, 2023 GBP (£) Facility	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) Facility	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Business Acquisition [Line Items]
Net impairment charge								$ 86,000
Additional mortgage loan									$ 1,332,962	$ 235,187	$ 1,332,962		$ 5,350,239
PHP Holdings [Member]
Business Acquisition [Line Items]
Capital restructuring costs										654,000
Equity investment										68,000
Convertible loan										$ 586,000
PHP Holdings [Member] | Maximum [Member]
Business Acquisition [Line Items]
First lien secured loan	$ 75,000
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]
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									151,000
Prospect [Member] | Pennsylvania [Member]
Business Acquisition [Line Items]
Carrying value of lease requiring residual value guarantee									170,000		170,000
Unbilled rent accruals										$ 112,000
Prospect [Member] | Pennsylvania [Member] | Maximum [Member]
Business Acquisition [Line Items]
Carrying value of lease requiring residual value guarantee									$ 250,000		$ 250,000
General Acute Care Hospitals [Member]
Business Acquisition [Line Items]
Purchase price of acquisition				$ 26,000	$ 80,000
Number of facilities acquired | Facility			8		2						6
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					3
Payment for acquisition | £		£ 44					£ 70
Number of leased facilities | Facility		5
Springstone Health Opco, LLC [Member]
Business Acquisition [Line Items]
Purchase price of acquisition			$ 250,000
Additional mortgage loan			$ 205,000
Springstone Health Opco, LLC [Member] | Behavioral Health Hospitals [Member]
Business Acquisition [Line Items]
Number of facilities acquired | Facility			18