Real Estate and Other Activities - Disposals - 2024 Activity Additional Information (Detail) $ in Thousands, £ in Millions				3 Months Ended				6 Months Ended
	Apr. 12, 2024 USD ($) Hospital	Apr. 09, 2024 USD ($) Property	May 01, 2023 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2024 GBP (£)	Mar. 31, 2023 Facility	Jun. 30, 2024 USD ($) Facility	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Investments in unconsolidated real estate joint ventures				$ 1,143,231				$ 1,143,231		$ 1,474,455
Revolving credit facility amount paid								(569,125)	$ (485,523)
Number of facilities sold | Facility							3
Five Prime Properties
Debt Instrument [Line Items]
Gain (loss) on real estate dispositions								23,000
Straight-line rent write-offs			$ 30,000
Institutional Asset Manager [Member]
Debt Instrument [Line Items]
Number of Utah hospitals sold | Hospital	5
Agreegate agreed valuation	$ 1,200,000
Percentage of interest sold in venture	75.00%
Percentage of interest retained in venture	25.00%
Investments in unconsolidated real estate joint ventures	$ 108,000
Proceeds from divestiture of interest in joint venture	886,000
Additional cash proceeds of non-recourse secured finance	190,000
Revolving credit facility amount paid	(1,100,000)
Gain (loss) on real estate dispositions	380,000							360,000
Write-off of unbilled straight-line rent receivables	20,000
Prime Healthcare Services, Inc. Facilities [Member]
Debt Instrument [Line Items]
Number of properties sold | Property		5
Profit (loss) from real estate operations								$ 7,000
Number of facilities sold | Facility								3
Number of ancillary facilities sold | Facility								2
Proceeds from sale of facilities		$ 250,000
Gain (loss) on real estate dispositions		53,000						$ 1,400
Proceeds from interest-bearing mortgage loan		100,000
Non-cash straight-line rent write-offs		30,000
Lease purchase option value		238,000
Lease purchase option price reverts		$ 260,000
Prime Healthcare Services, Inc. Facilities [Member] | Minimum [Member]
Debt Instrument [Line Items]
Inflation-based Percentage for Amended Lease		2.00%
Prime Healthcare Services, Inc. Facilities [Member] | Maximum [Member]
Debt Instrument [Line Items]
Inflation-based Percentage for Amended Lease		4.00%
Behavioral Health Hospitals [Member]
Debt Instrument [Line Items]
Profit (loss) from real estate operations					$ 35,400
General Acute Care Facility [Member]
Debt Instrument [Line Items]
Profit (loss) from real estate operations					$ 49,000	£ 46
CommonSpirit Health [Member]
Debt Instrument [Line Items]
Leased real estate acquire lease base	1,200,000
Derivative liability	$ 2,300
Straight-line rent write-offs			95,000	$ 95,000				$ 20,000
Amortization of Intangible Assets			$ 286,000