Real Estate and Other Activities - Summary of Investments in Unconsolidated Real Estate Joint Ventures by Operator (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	$ 1,422,010	$ 1,152,927
Median Kliniken S A R L [Member]
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	449,226	517,648
Swiss Medical Network [Member]
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	422,731	476,193
Steward (Macquarie Transaction) [Member]
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	419,040
Policlinico di Monza [Member]
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	78,057	95,468
HM Hospital [Member]
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	$ 52,956	$ 63,618