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Real Estate and Other Activities - 2025 Activity - Additional Information (Detail) $ in Thousands, SFr in Millions	1 Months Ended		3 Months Ended		6 Months Ended
	Apr. 30, 2025 USD ($)	Apr. 30, 2025 CHF (SFr)	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)
Debt Instrument [Line Items]
Cash paid for acquisitions of real estate assets					$ 29,322	$ 102,329
Gain (loss) on real estate dispositions					(1,000)	13,300
Investments in unconsolidated real estate joint ventures					$ 1,371,657		$ 1,399,777
Profit (loss) from real estate operations						$ 48,000
Steward Health Care System LLC [Member]
Debt Instrument [Line Items]
Total assets acquired				$ 39,000
Swiss Medical Network [Member]
Debt Instrument [Line Items]
Cash paid for acquisitions of real estate assets	$ 63,000	SFr 52
Proceeds from short-term loan	$ 30,000	SFr 25
Behavioral Health Hospitals [Member]
Debt Instrument [Line Items]
Profit (loss) from real estate operations			$ 10,700	$ 10,500