Real Estate and Other Activities - Disposals - 2024 Activity - Additional Information (Detail) $ in Thousands						3 Months Ended			9 Months Ended
	Aug. 14, 2024 USD ($) Freestanding	Jul. 23, 2024 USD ($) Bed Freestanding	Apr. 18, 2024 USD ($)	Apr. 12, 2024 USD ($) Hospital	Apr. 09, 2024 USD ($) Property	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2025 USD ($) Facility	Sep. 30, 2024 USD ($) Facility
Debt Instrument [Line Items]
Number of facilities sold | Facility									5
Proceeds from sale of investments									$ 100,000
Gain (loss) on real estate dispositions									4,000
Gain (loss) on sale of real estate						$ (9,115)	$ 91,795		$ 4,156	$ 475,196
Springstone Health Opco, LLC [Member]
Debt Instrument [Line Items]
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable								$ 12,000
Prime Healthcare Services, Inc. Facilities [Member]
Debt Instrument [Line Items]
Number of properties sold | Property					5
Number of facilities sold | Facility										4
Number of ancillary facilities sold | Facility										2
Proceeds from sale of investments					$ 250,000
Profit (loss) from real estate operations										$ 9,000
Gain (loss) on real estate dispositions					53,000					$ (2,000)
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%
Arizona General Hospital [Member] | Dignity Health [Member]
Debt Instrument [Line Items]
Number of bed sold | Bed		50
Freestanding Emergency Departments [Member] | Dignity Health [Member]
Debt Instrument [Line Items]
Number of facilities sold | Freestanding		7
Freestanding Emergency Departments [Member] | UCHealth [Member]
Debt Instrument [Line Items]
Number of facilities sold | Freestanding	11
General Hospital and Freestanding Emergency Departments [Member]
Debt Instrument [Line Items]
Gain (loss) on sale of real estate		$ 85,000	$ 40,000
Non-cash straight-line rent receivables	$ 16,000	20,000
General Hospital and Freestanding Emergency Departments [Member] | Dignity Health [Member]
Debt Instrument [Line Items]
Proceeds from sale of investments		$ 160,000
General Hospital and Freestanding Emergency Departments [Member] | UCHealth [Member]
Debt Instrument [Line Items]
Proceeds from sale of investments	$ 86,000
Institutional Asset Manager [Member]
Debt Instrument [Line Items]
Number of utah hospitals sold | Hospital				5
Gain (loss) on real estate dispositions				$ 380,000