Real Estate and Other Activities - Summary of Investments in Unconsolidated Real Estate Joint Ventures by Operator (Detail) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	$ 1,379,600	$ 1,156,397
Swiss Medical Network [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest	70.00%
Investments in unconsolidated real estate joint ventures	$ 603,933	483,770
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	$ 490,512	431,964
Common Spirit [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest	25.00%
Investments in unconsolidated real estate joint ventures	$ 147,165	113,202
Policlinico di Monza [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest	50.00%
Investments in unconsolidated real estate joint ventures	$ 85,110	77,592
HM Hospital [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest	45.00%
Investments in unconsolidated real estate joint ventures	$ 52,880	$ 49,869