Real Estate and Other Activities - Summary of Investments in Unconsolidated Real Estate Joint Ventures by Operator (Detail) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	$ 1,390,385	$ 1,399,777
Swiss Medical Network [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest	70.00%
Investments in unconsolidated real estate joint ventures	$ 609,795	611,347
Median Kliniken S.a.r.l ("MEDIAN") [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest	50.00%
Investments in unconsolidated real estate joint ventures	$ 474,120	486,695
Common Spirit [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest	25.00%
Investments in unconsolidated real estate joint ventures	$ 169,269	162,278
Policlinico di Monza [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest	50.00%
Investments in unconsolidated real estate joint ventures	$ 85,503	86,091
HM Hospital [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest	45.00%
Investments in unconsolidated real estate joint ventures	$ 51,698	$ 53,366